AVCodecContext Struct Reference

main external API structure. More...

#include <avcodec.h>

Data Fields
const AVClass *	av_class
	information on struct for av_log
int	log_level_offset
enum AVMediaType	codec_type
struct AVCodec *	codec
char	codec_name [32]
enum AVCodecID	codec_id
unsigned int	codec_tag
	fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
unsigned int	stream_codec_tag
	fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
void *	priv_data
struct AVCodecInternal *	internal
	Private context used for internal data.
void *	opaque
	Private data of the user, can be used to carry app specific stuff.
int	bit_rate
	the average bitrate
int	bit_rate_tolerance
	number of bits the bitstream is allowed to diverge from the reference.
int	global_quality
	Global quality for codecs which cannot change it per frame.
int	compression_level
int	flags
	CODEC_FLAG_*.
int	flags2
	CODEC_FLAG2_*.
uint8_t *	extradata
	some codecs need / can use extradata like Huffman tables.
int	extradata_size
AVRational	time_base
	This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
int	ticks_per_frame
	For some codecs, the time base is closer to the field rate than the frame rate.
int	delay
	Codec delay.
int	width
	picture width / height.
int	height
int	coded_width
	Bitstream width / height, may be different from width/height if lowres enabled.
int	coded_height
int	gop_size
	the number of pictures in a group of pictures, or 0 for intra_only
enum AVPixelFormat	pix_fmt
	Pixel format, see AV_PIX_FMT_xxx.
int	me_method
	Motion estimation algorithm used for video coding.
void(*	draw_horiz_band )(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)
	If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band.
enum AVPixelFormat(*	get_format )(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
	callback to negotiate the pixelFormat
int	max_b_frames
	maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 relative to the input.
float	b_quant_factor
	qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
int	rc_strategy
	obsolete FIXME remove
int	b_frame_strategy
float	b_quant_offset
	qscale offset between IP and B-frames
int	has_b_frames
	Size of the frame reordering buffer in the decoder.
int	mpeg_quant
	0-> h263 quant 1-> mpeg quant
float	i_quant_factor
	qscale factor between P and I-frames If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
float	i_quant_offset
	qscale offset between P and I-frames
float	lumi_masking
	luminance masking (0-> disabled)
float	temporal_cplx_masking
	temporary complexity masking (0-> disabled)
float	spatial_cplx_masking
	spatial complexity masking (0-> disabled)
float	p_masking
	p block masking (0-> disabled)
float	dark_masking
	darkness masking (0-> disabled)
int	slice_count
	slice count
int	prediction_method
	prediction method (needed for huffyuv)
int *	slice_offset
	slice offsets in the frame in bytes
AVRational	sample_aspect_ratio
	sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.
int	me_cmp
	motion estimation comparison function
int	me_sub_cmp
	subpixel motion estimation comparison function
int	mb_cmp
	macroblock comparison function (not supported yet)
int	ildct_cmp
	interlaced DCT comparison function
int	dia_size
	ME diamond size & shape.
int	last_predictor_count
	amount of previous MV predictors (2a+1 x 2a+1 square)
int	pre_me
	prepass for motion estimation
int	me_pre_cmp
	motion estimation prepass comparison function
int	pre_dia_size
	ME prepass diamond size & shape.
int	me_subpel_quality
	subpel ME quality
int	dtg_active_format
	DTG active format information (additional aspect ratio information only used in DVB MPEG-2 transport streams) 0 if not set.
int	me_range
	maximum motion estimation search range in subpel units If 0 then no limit.
int	intra_quant_bias
	intra quantizer bias
int	inter_quant_bias
	inter quantizer bias
int	slice_flags
	slice flags
int	xvmc_acceleration
	XVideo Motion Acceleration.
int	mb_decision
	macroblock decision mode
uint16_t *	intra_matrix
	custom intra quantization matrix
uint16_t *	inter_matrix
	custom inter quantization matrix
int	scenechange_threshold
	scene change detection threshold 0 is default, larger means fewer detected scene changes.
int	noise_reduction
	noise reduction strength
int	me_threshold
	Motion estimation threshold below which no motion estimation is performed, but instead the user specified motion vectors are used.
int	mb_threshold
	Macroblock threshold below which the user specified macroblock types will be used.
int	intra_dc_precision
	precision of the intra DC coefficient - 8
int	skip_top
	Number of macroblock rows at the top which are skipped.
int	skip_bottom
	Number of macroblock rows at the bottom which are skipped.
float	border_masking
	Border processing masking, raises the quantizer for mbs on the borders of the picture.
int	mb_lmin
	minimum MB lagrange multipler
int	mb_lmax
	maximum MB lagrange multipler
int	me_penalty_compensation
int	bidir_refine
int	brd_scale
int	keyint_min
	minimum GOP size
int	refs
	number of reference frames
int	chromaoffset
	chroma qp offset from luma
int	scenechange_factor
	Multiplied by qscale for each frame and added to scene_change_score.
int	mv0_threshold
	Note: Value depends upon the compare function used for fullpel ME.
int	b_sensitivity
	Adjust sensitivity of b_frame_strategy 1.
enum AVColorPrimaries	color_primaries
	Chromaticity coordinates of the source primaries.
enum AVColorTransferCharacteristic	color_trc
	Color Transfer Characteristic.
enum AVColorSpace	colorspace
	YUV colorspace type.
enum AVColorRange	color_range
	MPEG vs JPEG YUV range.
enum AVChromaLocation	chroma_sample_location
	This defines the location of chroma samples.
int	slices
	Number of slices.
enum AVFieldOrder	field_order
	Field order.
int	sample_rate
	samples per second
int	channels
	number of audio channels
enum AVSampleFormat	sample_fmt
	audio sample format
int	frame_size
	Number of samples per channel in an audio frame.
int	frame_number
	Frame counter, set by libavcodec.
int	block_align
	number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.
int	cutoff
	Audio cutoff bandwidth (0 means "automatic")
uint64_t	channel_layout
	Audio channel layout.
uint64_t	request_channel_layout
	Request decoder to use this channel layout if it can (0 for default)
enum AVAudioServiceType	audio_service_type
	Type of service that the audio stream conveys.
enum AVSampleFormat	request_sample_fmt
	desired sample format
int(*	get_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called at the beginning of each frame to get a buffer for it.
void(*	release_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called to release buffers which were allocated with get_buffer.
int(*	reget_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called at the beginning of a frame to get cr buffer for it.
float	qcompress
	amount of qscale change between easy & hard scenes (0.0-1.0)
float	qblur
	amount of qscale smoothing over time (0.0-1.0)
int	qmin
	minimum quantizer
int	qmax
	maximum quantizer
int	max_qdiff
	maximum quantizer difference between frames
float	rc_qsquish
	ratecontrol qmin qmax limiting method 0-> clipping, 1-> use a nice continuous function to limit qscale wthin qmin/qmax.
float	rc_qmod_amp
int	rc_qmod_freq
int	rc_buffer_size
	decoder bitstream buffer size
int	rc_override_count
	ratecontrol override, see RcOverride
RcOverride *	rc_override
const char *	rc_eq
	rate control equation
int	rc_max_rate
	maximum bitrate
int	rc_min_rate
	minimum bitrate
float	rc_buffer_aggressivity
float	rc_initial_cplx
	initial complexity for pass1 ratecontrol
float	rc_max_available_vbv_use
	Ratecontrol attempt to use, at maximum, of what can be used without an underflow.
float	rc_min_vbv_overflow_use
	Ratecontrol attempt to use, at least, times the amount needed to prevent a vbv overflow.
int	rc_initial_buffer_occupancy
	Number of bits which should be loaded into the rc buffer before decoding starts.
int	coder_type
	coder type
int	context_model
	context model
int	lmin
	minimum Lagrange multipler
int	lmax
	maximum Lagrange multipler
int	frame_skip_threshold
	frame skip threshold
int	frame_skip_factor
	frame skip factor
int	frame_skip_exp
	frame skip exponent
int	frame_skip_cmp
	frame skip comparison function
int	trellis
	trellis RD quantization
int	min_prediction_order
int	max_prediction_order
int64_t	timecode_frame_start
	GOP timecode frame start number.
void(*	rtp_callback )(struct AVCodecContext *avctx, void *data, int size, int mb_nb)
int	rtp_payload_size
int	mv_bits
int	header_bits
int	i_tex_bits
int	p_tex_bits
int	i_count
int	p_count
int	skip_count
int	misc_bits
int	frame_bits
	number of bits used for the previously encoded frame
char *	stats_out
	pass1 encoding statistics output buffer
char *	stats_in
	pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed here.
int	workaround_bugs
	Work around bugs in encoders which sometimes cannot be detected automatically.
int	strict_std_compliance
	strictly follow the standard (MPEG4, ...).
int	error_concealment
	error concealment flags
int	debug
	debug
int	debug_mv
	debug
int	err_recognition
	Error recognition; may misdetect some more or less valid parts as errors.
int64_t	reordered_opaque
	opaque 64bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque
struct AVHWAccel *	hwaccel
	Hardware accelerator in use.
void *	hwaccel_context
	Hardware accelerator context.
uint64_t	error [AV_NUM_DATA_POINTERS]
	error
int	dct_algo
	DCT algorithm, see FF_DCT_* below.
int	idct_algo
	IDCT algorithm, see FF_IDCT_* below.
int	bits_per_coded_sample
	bits per sample/pixel from the demuxer (needed for huffyuv).
int	bits_per_raw_sample
	Bits per sample/pixel of internal libavcodec pixel/sample format.
int	lowres
	low resolution decoding, 1-> 1/2 size, 2->1/4 size
AVFrame *	coded_frame
	the picture in the bitstream
int	thread_count
	thread count is used to decide how many independent tasks should be passed to execute()
int	thread_type
	Which multithreading methods to use.
int	active_thread_type
	Which multithreading methods are in use by the codec.
int	thread_safe_callbacks
	Set by the client if its custom get_buffer() callback can be called synchronously from another thread, which allows faster multithreaded decoding.
int(*	execute )(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
	The codec may call this to execute several independent things.
int(*	execute2 )(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
	The codec may call this to execute several independent things.
void *	thread_opaque
	thread opaque Can be used by execute() to store some per AVCodecContext stuff.
int	nsse_weight
	noise vs.
int	profile
	profile
int	level
	level
enum AVDiscard	skip_loop_filter
enum AVDiscard	skip_idct
enum AVDiscard	skip_frame
uint8_t *	subtitle_header
	Header containing style information for text subtitles.
int	subtitle_header_size
int	error_rate
	Simulates errors in the bitstream to test error concealment.
AVPacket *	pkt
	Current packet as passed into the decoder, to avoid having to pass the packet into every function.
uint64_t	vbv_delay
	VBV delay coded in the last frame (in periods of a 27 MHz clock).
AVRational	pkt_timebase
	Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
const AVCodecDescriptor *	codec_descriptor
	AVCodecDescriptor Code outside libavcodec should access this field using: av_codec_{get,set}_codec_descriptor(avctx)
int64_t	pts_correction_num_faulty_pts
	Current statistics for PTS correction.
int64_t	pts_correction_num_faulty_dts
	Number of incorrect PTS values so far.
int64_t	pts_correction_last_pts
	Number of incorrect DTS values so far.
int64_t	pts_correction_last_dts
	PTS of the last frame.
AVDictionary *	metadata
	DTS of the last frame.
char *	sub_charenc
	Character encoding of the input subtitles file.
int	sub_charenc_mode
	Subtitles character encoding mode.

Detailed Description

main external API structure.

New fields can be added to the end with minor version bumps. Removal, reordering and changes to existing fields require a major version bump. Please use AVOptions (av_opt* / av_set/get*()) to access these fields from user applications. sizeof(AVCodecContext) must not be used outside libav*.

Examples:

doc/examples/decoding_encoding.c, doc/examples/demuxing.c, doc/examples/filtering_audio.c, doc/examples/filtering_video.c, and doc/examples/muxing.c.

Definition at line 1560 of file avcodec.h.

Field Documentation

const AVClass* AVCodecContext::av_class

information on struct for av_log

• set by avcodec_alloc_context3

Definition at line 1565 of file avcodec.h.

Referenced by avcodec_get_context_defaults3().

int AVCodecContext::log_level_offset

Definition at line 1566 of file avcodec.h.

enum AVMediaType AVCodecContext::codec_type

Definition at line 1568 of file avcodec.h.

Referenced by add_av_stream(), add_codec(), add_dstream(), add_input_streams(), adts_aac_read_header(), adx_read_header(), aea_read_header(), afc_read_header(), aiff_write_header(), aiff_write_packet(), amr_read_header(), apc_read_header(), ape_read_header(), ape_tag_read_field(), aqt_read_header(), asf_read_header(), asf_read_picture(), asf_read_stream_properties(), asf_write_header1(), asf_write_packet(), ass_read_header(), ast_read_header(), audio_read_header(), av_find_best_stream(), av_find_default_stream_index(), av_interleaved_write_frame(), avcodec_default_free_buffers(), avcodec_default_get_buffer(), avcodec_default_reget_buffer(), avcodec_default_release_buffer(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), avformat_match_stream_specifier(), avi_read_header(), avi_read_seek(), avi_sync(), avi_write_counters(), avi_write_header(), avi_write_idx1(), avi_write_ix(), avi_write_packet(), avi_write_trailer(), avisynth_read_header(), avpriv_dv_init_demux(), avr_read_header(), avs_read_packet(), bfi_read_header(), bmv_read_header(), build_feed_streams(), build_frame_code(), caca_write_header(), cdata_read_header(), cdxl_read_packet(), celt_header(), choose_decoder(), choose_encoder(), cin_read_header(), compute_bandwidth(), compute_pkt_fields2(), compute_status(), configure_input_video_filter(), create_audio_stream(), create_new_audio_stream(), create_stream(), daud_header(), dc1394_read_common(), decode_stream_header(), dfa_read_header(), dirac_header(), do_streamcopy(), do_video_stats(), dshow_add_device(), dtshd_read_header(), dump_stream_format(), dv_assemble_frame(), dv_extract_audio_info(), dv_init_mux(), dxa_read_header(), ea_read_header(), epaf_read_header(), fbdev_read_header(), ff_asf_parse_packet(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_choose_timebase(), ff_compute_frame_duration(), ff_dsputil_init(), ff_id3v2_parse_apic(), ff_interleave_add_packet(), ff_interleave_compare_dts(), ff_interleave_packet_per_dts(), ff_mov_init_hinting(), ff_mov_read_stsd_entries(), ff_parse_mpeg2_descriptor(), ff_raw_audio_read_header(), ff_raw_video_read_header(), ff_rm_parse_packet(), ff_rm_read_mdpr_codecdata(), ff_rtp_get_codec_info(), ff_rtp_get_payload_type(), ff_spdif_read_packet(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), filter_codec_opts(), find_stream(), flac_header(), flac_read_header(), flush_encoders(), flv_data_packet(), flv_read_metabody(), flv_read_packet(), flv_write_header(), flv_write_packet(), flv_write_trailer(), force_codec_ids(), fourxm_read_header(), frm_read_header(), g722_read_header(), g723_1_init(), g729_read_header(), get_aiff_header(), get_attachment(), get_bit_rate(), get_sindex(), gif_read_header(), gif_write_header(), gif_write_packet(), grab_read_header(), gsm_read_header(), gxf_compare_field_nb(), gxf_interleave_packet(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_packet(), handle_file(), has_codec_parameters(), hls_write_header(), hls_write_packet(), http_prepare_data(), idcin_read_header(), iff_read_header(), iff_read_packet(), ilbc_read_header(), img_read_header(), init_input_filter(), init_muxer(), init_pts(), init_stream(), ipmovie_read_header(), ipod_get_codec_tag(), ircam_read_header(), is_intra_only(), ism_write_header(), ism_write_packet(), iss_read_header(), ivf_write_header(), jacosub_read_header(), lavfi_read_header(), lmlm4_read_header(), loas_read_header(), lvf_read_header(), lxf_read_header(), m4sl_cb(), matroska_read_header(), microdvd_read_header(), mkv_write_attachments(), mkv_write_codecprivate(), mkv_write_packet(), mkv_write_packet_internal(), mkv_write_tracks(), mmf_read_header(), modplug_read_header(), mov_build_index(), mov_create_chapter_track(), mov_create_timecode_track(), mov_get_codec_tag(), mov_read_covr(), mov_read_hdlr(), mov_read_header(), mov_read_trak(), mov_read_trun(), mov_write_audio_tag(), mov_write_esds_tag(), mov_write_ftyp_tag(), mov_write_hdlr_tag(), mov_write_header(), mov_write_iods_tag(), mov_write_isml_manifest(), mov_write_minf_tag(), mov_write_moov_tag(), mov_write_single_packet(), mov_write_stbl_tag(), mov_write_stsd_tag(), mov_write_stts_tag(), mov_write_tfhd_tag(), mov_write_tkhd_tag(), mov_write_trak_tag(), movie_common_init(), movie_config_output_props(), movie_push_frame(), movie_query_formats(), mp3_read_header(), mp4_get_codec_tag(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpeg_mux_write_packet(), mpeg_parse_packet(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pes(), mpegts_write_pmt(), mpl2_read_header(), mpsub_read_header(), msnwc_tcp_read_header(), mtv_read_header(), mv_read_header(), mxf_handle_small_eubc(), mxf_parse_dnxhd_frame(), mxf_parse_dv_frame(), mxf_parse_structural_metadata(), mxf_read_packet(), mxf_read_packet_old(), mxf_read_seek(), mxf_write_common_fields(), mxf_write_header(), mxf_write_packet(), mxg_read_header(), nc_read_header(), new_audio_stream(), new_output_stream(), new_stream(), new_subtitle_stream(), nist_read_header(), nsv_parse_NSVs_header(), nut_read_header(), nut_write_header(), nuv_header(), ogg_read_seek(), ogg_write_header(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_header(), open_input_stream(), open_output_file(), opt_map_channel(), opt_target(), opus_header(), output_packet(), parse_ffconfig(), parse_packet(), parse_picture(), pcm_read_header(), pjs_read_header(), pmp_header(), pmt_cb(), print_report(), process_frame(), process_input(), pulse_read_header(), put_frame(), pva_read_header(), pvf_read_header(), qcp_read_header(), qt_rtp_parse_packet(), r3d_read_red1(), rawvideo_read_header(), read_desc_chunk(), read_ffserver_streams(), read_frame(), read_header(), read_index(), read_packet(), realtext_read_header(), report_new_stream(), rl2_read_header(), rm_read_audio_stream_info(), rm_read_dts(), rm_read_header(), rm_write_header(), rm_write_packet(), roq_read_packet(), rpl_read_header(), rpl_read_packet(), rso_read_header(), rtp_write_header(), rv10_write_header(), sami_read_header(), sbg_read_header(), sdl_write_header(), seg_write_header(), select_reference_stream(), seq_read_header(), set_codec_from_probe_data(), show_frame(), show_packet(), show_stream(), siff_parse_vbv1(), skeleton_header(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smjpeg_write_packet(), smush_read_header(), sol_read_header(), sox_read_header(), speex_header(), srt_read_header(), srt_write_header(), str_read_packet(), stream_component_close(), stream_component_open(), stream_cycle_channel(), sub2video_prepare(), subviewer1_read_header(), subviewer_read_header(), swf_read_packet(), swf_write_header(), swf_write_packet(), swf_write_trailer(), tak_read_header(), tedcaptions_read_header(), theora_header(), thp_read_header(), tmcd_is_referenced(), tmv_read_header(), transcode_init(), try_decode_frame(), tta_read_header(), txd_read_header(), update_stream_timings(), v4l2_read_header(), vc1t_read_header(), vfw_read_header(), vid_read_packet(), vivo_read_header(), vmd_read_header(), voc_read_header(), voc_write_header(), vorbis_header(), vplayer_read_header(), vqf_read_header(), wc3_read_header(), webvtt_read_header(), write_frame(), write_header(), write_manifest(), write_stream_codec(), write_stream_codec_info(), write_stream_data(), write_streamheader(), write_streaminfo(), write_timestamp(), wsaud_read_header(), wsvqa_read_header(), wsvqa_read_packet(), wv_read_header(), x11grab_read_header(), xa_read_header(), xmv_read_header(), yop_read_header(), and yuv4_read_header().

struct AVCodec* AVCodecContext::codec

Examples:

doc/examples/muxing.c.

Definition at line 1569 of file avcodec.h.

Referenced by a64_write_header(), a64multi_init_encoder(), adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), apply_param_change(), audio_decode_frame(), avcodec_close(), avcodec_copy_context(), avcodec_decode_audio4(), avcodec_decode_subtitle2(), avcodec_decode_video2(), avcodec_encode_audio2(), avcodec_encode_subtitle(), avcodec_encode_video2(), avcodec_flush_buffers(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), check_format(), close_connection(), codec_child_next(), config(), context_to_name(), copy_frame(), decode_end(), decode_frame(), decode_init(), decode_nal_units(), do_video_out(), dpcm_decode_frame(), dpcm_decode_init(), eightsvx_decode_init(), encode_init(), execute_decode_slices(), ff_draw_horiz_band(), ff_er_frame_end(), ff_frame_thread_encoder_init(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_frame_start(), ff_init_buffer_info(), ff_mjpeg_decode_init(), ff_MPV_encode_init(), ff_MPV_frame_end(), ff_print_debug_info2(), ff_thread_can_start_frame(), ff_thread_flush(), ff_thread_get_buffer(), ff_thread_init(), ff_vc1_parse_frame_header(), ff_vdpau_mpeg4_decode_picture(), ff_vp56_init_context(), ff_wma_end(), ff_wma_init(), ffv1_close(), field_end(), flush_encoders(), frame_thread_free(), frame_thread_init(), frame_worker_thread(), get_category(), get_nb_samples(), get_pixel_format(), h261_decode_init(), h264_set_parameter_from_sps(), h264_slice_header_init(), init(), mov_write_video_tag(), movie_common_init(), mpeg_decode_init(), open_audio(), pcm_decode_frame(), pcm_decode_init(), pcm_encode_frame(), pcm_encode_init(), process_frame(), read_thread(), reap_filters(), receive_frame(), show_stream(), srt_decode_frame(), srt_encode_frame(), srt_end_cb(), srt_move_cb(), submit_packet(), svq3_decode_init(), try_decode_frame(), update_context_from_thread(), vaapi_mpeg4_decode_slice(), vaapi_mpeg4_start_frame(), validate_thread_parameters(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), vdadec_init(), vdpau_mpeg4_start_frame(), video_thread(), vp6_decode_init(), wma_decode_init(), and write_frame().

char AVCodecContext::codec_name[32]

Definition at line 1570 of file avcodec.h.

Referenced by asf_write_header1(), ff_mov_read_stsd_entries(), ico_check_attributes(), rm_read_audio_stream_info(), and skeleton_header().

enum AVCodecID AVCodecContext::codec_id

Examples:

doc/examples/demuxing.c, and doc/examples/muxing.c.

Definition at line 1571 of file avcodec.h.

Referenced by add_av_stream(), add_input_streams(), add_stream(), adts_aac_read_header(), adx_read_header(), aea_read_header(), afc_read_header(), aiff_read_header(), aiff_write_header(), amf_parse_object(), amr_decode_fix_avctx(), amr_handle_packet(), amr_read_header(), amr_read_packet(), apc_read_header(), ape_read_header(), ape_tag_read_field(), aqt_read_header(), asf_read_picture(), asf_read_stream_properties(), asf_write_header1(), ass_read_header(), ast_read_header(), ast_write_header(), audio_read_header(), audio_write_header(), av_find_best_stream(), av_get_audio_frame_duration(), avcodec_align_dimensions2(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), avi_read_header(), avi_write_header(), avi_write_packet(), avi_write_trailer(), avisynth_read_header(), avpriv_dv_init_demux(), avpriv_mpa_decode_header(), avr_read_header(), avs_read_packet(), bfi_read_header(), bmv_read_header(), caca_write_header(), caf_write_header(), caf_write_trailer(), cdata_read_header(), cdxl_read_packet(), celt_header(), choose_decoder(), choose_encoder(), choose_pix_fmts(), choose_pixel_fmt(), cin_read_header(), clone_tables(), close_input_file(), commit_bitstream_and_slice_buffer(), common_init(), compute_pkt_fields(), compute_status(), create_audio_stream(), create_new_audio_stream(), cyuv_decode_frame(), daud_header(), dc1394_read_common(), decode_end(), decode_frame(), decode_init(), decode_mb(), decode_slice(), decode_stream_header(), determinable_frame_size(), dfa_read_header(), dirac_header(), do_subtitle_out(), dshow_add_device(), dsputil_init_3dnow(), dsputil_init_mmxext(), dtshd_read_header(), dv_extract_audio_info(), dv_init_mux(), dxa_read_header(), dxva2_vc1_decode_slice(), ea_read_header(), encode_frame(), encode_init(), encode_mb(), epaf_read_header(), estimate_best_b_count(), extract_mpeg4_header(), fbdev_read_header(), ff_aac_ac3_parse(), ff_ac3_encode_init(), ff_asf_parse_packet(), ff_audio_interleave_init(), ff_draw_horiz_band(), ff_dsputil_init_pix_mmx(), ff_er_frame_end(), ff_get_audio_frame_size(), ff_h264_decode_init(), ff_h264_frame_start(), ff_id3v2_parse_apic(), ff_id3v2_write_apic(), ff_init_me(), ff_ivi_decode_close(), ff_ivi_decode_frame(), ff_load_image(), ff_mjpeg_encode_picture_header(), ff_mjpeg_find_marker(), ff_mov_read_stsd_entries(), ff_mov_write_packet(), ff_mp4_read_dec_config_descr(), ff_MPV_encode_init(), ff_parse_mpeg2_descriptor(), ff_pcm_read_seek(), ff_pnm_decode_header(), ff_psy_init(), ff_psy_preprocess_init(), ff_raw_audio_read_header(), ff_raw_video_read_header(), ff_rm_parse_packet(), ff_rm_read_mdpr_codecdata(), ff_rtp_get_codec_info(), ff_rtp_get_payload_type(), ff_rtp_parse_open(), ff_rv34_decode_init(), ff_spdif_read_packet(), ff_vc1_decode_end(), ff_vc1_decode_init_alloc_tables(), ff_vc1_parse_frame_header(), ff_voc_get_packet(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), ffserver_opt_preset(), film_read_header(), find_expected_header(), find_stream_in_feed(), flac_header(), flac_read_header(), flac_write_header(), flv_data_packet(), flv_read_packet(), flv_same_audio_codec(), flv_same_video_codec(), flv_set_audio_codec(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), flv_write_trailer(), force_codec_ids(), fourxm_read_header(), frame_worker_thread(), frm_read_header(), g722_read_header(), g723_1_init(), g729_read_header(), get_aiff_header(), get_attachment(), get_audio_flags(), get_bit_rate(), get_codec_data(), get_packet_header(), get_private_data(), get_sindex(), get_video_private_data(), gif_read_header(), grab_read_header(), gsm_decode_frame(), gsm_init(), gsm_parse(), gsm_read_header(), guess_mv(), gxf_packet(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_packet(), gxf_write_umf_media_description(), gxf_write_umf_media_mpeg(), h264_set_parameter_from_sps(), handle_file(), handle_rstn(), has_codec_parameters(), has_decode_delay_been_guessed(), ico_check_attributes(), ico_write_packet(), ico_write_trailer(), idcin_read_header(), iff_read_header(), ilbc_read_header(), ilbc_write_header(), imc_decode_block(), imc_decode_init(), img_read_header(), img_read_packet(), imx_dump_header(), init_input_stream(), init_muxer(), ipmovie_read_header(), ipod_get_codec_tag(), ircam_read_header(), ircam_write_header(), is_intra_more_likely(), is_intra_only(), ism_write_header(), iss_read_header(), ivf_write_header(), jacosub_read_header(), latm_write_header(), latm_write_packet(), lavfi_read_header(), libgsm_decode_init(), libgsm_encode_frame(), libgsm_encode_init(), libgsm_flush(), lmlm4_read_header(), loas_read_header(), lvf_read_header(), lxf_read_header(), m4sl_cb(), mace_decode_frame(), matroska_parse_block(), matroska_parse_frame(), matroska_parse_rm_audio(), matroska_read_header(), microdvd_read_header(), microdvd_write_header(), mjpega_dump_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_codecprivate(), mkv_write_header(), mkv_write_packet_internal(), mkv_write_tracks(), mmf_read_header(), modplug_read_header(), mov_find_codec_tag(), mov_get_codec_tag(), mov_read_covr(), mov_read_enda(), mov_read_extradata(), mov_read_hdlr(), mov_read_header(), mov_read_trak(), mov_read_wave(), mov_write_audio_tag(), mov_write_chan_tag(), mov_write_esds_tag(), mov_write_ftyp_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_packet(), mov_write_trailer(), mov_write_uuidprof_tag(), mov_write_video_tag(), mov_write_wave_tag(), mp3_read_header(), mp4_get_codec_tag(), mpc8_read_header(), mpc_read_header(), mpeg1_decode_sequence(), mpeg_decode_postinit(), mpeg_decode_sequence_extension(), mpeg_get_pixelformat(), mpeg_mux_init(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_push_data(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pes(), mpegts_write_pmt(), mpegvideo_extract_headers(), mpl2_read_header(), mpsub_read_header(), msnwc_tcp_read_header(), mtv_read_header(), mv_read_header(), mvc_decode_frame(), mvc_decode_init(), mxf_handle_small_eubc(), mxf_parse_structural_metadata(), mxf_set_audio_pts(), mxf_write_cdci_common(), mxf_write_d10_audio_packet(), mxf_write_generic_sound_common(), mxf_write_header(), mxf_write_packet(), mxg_read_header(), nc_read_header(), nist_read_header(), nsv_parse_NSVs_header(), nsv_read_chunk(), nut_read_header(), nuv_header(), ogg_buffer_data(), ogg_validate_keyframe(), ogg_write_header(), ogg_write_packet(), ogg_write_trailer(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_header(), open_codec_context(), open_input_file(), open_stream(), opus_header(), parse(), parse_audio_var(), parse_ffconfig(), parse_fmtp(), parse_media_type(), parse_mpeg1waveformatex(), parse_picture(), parse_video_var(), pcm_decode_frame(), pcm_decode_init(), pcm_read_header(), pjs_read_header(), pmp_header(), probe_codec(), pulse_read_header(), put_xiph_codecpriv(), pva_read_header(), pvf_read_header(), qcp_read_header(), qdm2_parse_packet(), r3d_read_red1(), rawvideo_read_header(), rdt_parse_packet(), read_access_unit(), read_desc_chunk(), read_ffserver_streams(), read_frame(), read_frame_internal(), read_header(), read_kuki_chunk(), read_major_sync(), read_matrix_params(), read_packet(), read_restart_header(), realtext_read_header(), remove_extradata(), rl2_read_header(), rm_ac3_swap_bytes(), rm_read_audio_stream_info(), rm_write_audio(), roq_read_packet(), rpl_read_header(), rso_read_header(), rso_write_header(), rtp_write_header(), rtp_write_packet(), rv10_decode_init(), rv10_write_header(), rv34_parse(), sami_read_header(), sbg_read_header(), sdl_write_header(), sdp_parse_fmtp_config_h264(), seek_frame_generic(), segment_mux_init(), seq_read_header(), set_codec_from_probe_data(), set_mv_strides(), setup_find_stream_info_opts(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smush_read_header(), sol_read_header(), sox_read_header(), sox_write_header(), sox_write_trailer(), sp5x_decode_frame(), spdif_write_header(), speex_header(), srt_read_header(), srt_write_header(), srt_write_packet(), str_read_packet(), stream_component_open(), subviewer1_read_header(), subviewer_read_header(), svq3_parse_packet(), swf_read_packet(), swf_write_header(), swf_write_video(), tak_read_header(), tb_unreliable(), tedcaptions_read_header(), theora_header(), thp_read_header(), tmv_read_header(), transcode_init(), try_decode_frame(), tta_read_header(), txd_read_header(), v408_decode_frame(), v408_encode_frame(), v4l2_read_header(), vaapi_vc1_decode_slice(), validate_codec_tag(), vc1_decode_frame(), vc1_decode_init(), vc1t_read_header(), vc1test_write_header(), vcr2_init_sequence(), vfw_read_header(), vid_read_packet(), vivo_read_header(), vmd_read_header(), voc_write_header(), vorbis_header(), vp3_decode_init(), vplayer_read_header(), vqf_read_header(), wc3_read_header(), webvtt_read_header(), write_header(), write_packet(), write_stream_codec_info(), wsaud_read_header(), wsaud_read_packet(), wsvqa_read_header(), wsvqa_read_packet(), wv_read_header(), x11grab_read_header(), xa_read_header(), xmv_read_header(), xvid_encode_init(), xwma_read_header(), yop_read_header(), and yuv4_read_header().

unsigned int AVCodecContext::codec_tag

fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').

This is used to work around some encoder bugs. A demuxer should set this to what is stored in the field used to identify the codec. If there are multiple such fields in a container then the demuxer should choose the one which maximizes the information about the used codec. If the codec tag field in a container is larger than 32 bits then the demuxer should remap the longer ID to 32 bits with a table or other structure. Alternatively a new extra_codec_tag + size could be added but for this a clear advantage must be demonstrated first.

• encoding: Set by user, if not then the default based on codec_id will be used.
• decoding: Set by user, will be converted to uppercase by libavcodec during init.

Definition at line 1586 of file avcodec.h.

Referenced by a64multi_init_encoder(), aasc_decode_frame(), add_input_streams(), aiff_write_header(), amr_read_header(), ape_read_header(), asf_read_stream_properties(), asf_write_header1(), av_get_audio_frame_duration(), avcodec_string(), avformat_find_stream_info(), avi_read_header(), avi_read_idx1(), avi_write_header(), avisynth_read_header(), avpriv_dv_frame_profile2(), cdata_read_header(), cdxl_read_packet(), cin_read_header(), daud_header(), decode_frame(), decode_init(), decode_stream_header(), dpcm_decode_frame(), dpcm_decode_init(), ea_read_header(), encode_init(), export_orphan_timecode(), ff_h264_decode_seq_parameter_set(), ff_mjpeg_decode_sos(), ff_mov_init_hinting(), ff_mov_read_stsd_entries(), ff_MPV_common_init(), ff_parse_mpeg2_descriptor(), ff_rm_read_mdpr_codecdata(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), flv_same_audio_codec(), flv_same_video_codec(), flv_set_audio_codec(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), fourxm_read_header(), frm_read_header(), get_aiff_header(), get_audio_flags(), get_codec_data(), handle_file(), idcin_read_header(), iff_read_header(), iff_read_packet(), init_muxer(), init_stream(), ipmovie_read_header(), ipod_get_codec_tag(), ivf_write_header(), lvf_read_header(), lxf_read_header(), matroska_read_header(), mkv_write_codecprivate(), mkv_write_tracks(), mov_create_timecode_track(), mov_get_codec_tag(), mov_get_rawvideo_codec_tag(), mov_read_header(), mov_read_trak(), mov_write_gmhd_tag(), mov_write_hdlr_tag(), mov_write_header(), mov_write_ms_tag(), mov_write_stbl_tag(), mov_write_stsd_tag(), mp4_get_codec_tag(), mpeg_decode_frame(), mpegts_set_stream_info(), msnwc_tcp_read_header(), mv_read_header(), new_output_stream(), nsv_parse_NSVs_header(), nut_read_header(), ogm_header(), oma_read_header(), oma_write_header(), parse_audio_var(), parse_ffconfig(), pmt_cb(), prores_encode_init(), raw_decode(), raw_encode(), raw_init_decoder(), raw_init_encoder(), read_desc_chunk(), read_header(), rl2_read_header(), rm_read_audio_stream_info(), roq_read_packet(), rpl_read_header(), rpl_read_packet(), rso_read_header(), rso_write_header(), rv10_write_header(), segment_mux_init(), seq_read_header(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smjpeg_read_header(), smush_read_header(), sol_read_header(), str_read_packet(), tb_unreliable(), thp_read_header(), transcode_init(), utvideo_decode_init(), utvideo_encode_init(), v4l2_read_header(), validate_codec_tag(), vivo_read_header(), vmd_read_header(), voc_write_header(), voc_write_packet(), vp3_decode_init(), wc3_read_header(), write_streamheader(), wsvqa_read_header(), xmv_read_header(), xsub_encoder_init(), xvid_encode_init(), xwma_read_header(), and zero12v_decode_init().

unsigned int AVCodecContext::stream_codec_tag

fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').

This is used to work around some encoder bugs.

• encoding: unused
• decoding: Set by user, will be converted to uppercase by libavcodec during init.

Definition at line 1594 of file avcodec.h.

Referenced by avi_read_header(), avisynth_read_header(), and ff_MPV_common_init().

void* AVCodecContext::priv_data

Examples:

doc/examples/decoding_encoding.c.

Definition at line 1603 of file avcodec.h.

Referenced by a64multi_close_encoder(), a64multi_encode_frame(), a64multi_init_encoder(), aac_decode_close(), aac_decode_frame(), aac_decode_frame_int(), aac_decode_init(), aac_encode_close(), aac_encode_end(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_close(), aacPlus_encode_frame(), aacPlus_encode_init(), aasc_decode_end(), aasc_decode_frame(), aasc_decode_init(), ac3_decode_end(), ac3_decode_frame(), ac3_decode_init(), ac3_fixed_encode_init(), adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_close(), adpcm_encode_init(), adpcm_swf_decode(), adx_decode_flush(), adx_decode_frame(), adx_decode_init(), adx_encode_frame(), adx_encode_header(), adx_encode_init(), alac_decode_close(), alac_decode_frame(), alac_decode_init(), alac_encode_close(), alac_encode_frame(), alac_encode_init(), allocate_tables(), amr_wb_encode_close(), amr_wb_encode_frame(), amr_wb_encode_init(), amrnb_decode_frame(), amrnb_decode_init(), amrwb_decode_frame(), amrwb_decode_init(), amv_encode_picture(), ape_decode_close(), ape_decode_frame(), ape_decode_init(), ape_flush(), apply_window_and_mdct(), ass_decode_close(), ass_decode_frame(), ass_decode_init(), atrac1_decode_end(), atrac1_decode_frame(), atrac1_decode_init(), atrac3_decode_close(), atrac3_decode_frame(), atrac3_decode_init(), aura_decode_end(), aura_decode_frame(), aura_decode_init(), avcodec_close(), avcodec_copy_context(), avcodec_get_context_defaults3(), avcodec_open2(), avpriv_h264_has_num_reorder_frames(), avs_decode_end(), avs_decode_frame(), avs_decode_init(), bethsoftvid_decode_end(), bethsoftvid_decode_frame(), bethsoftvid_decode_init(), bfi_decode_close(), bfi_decode_frame(), bfi_decode_init(), bmp_decode_end(), bmp_decode_frame(), bmp_decode_init(), bmp_encode_frame(), bmp_encode_init(), brpix_decode_frame(), brpix_end(), brpix_init(), build_color_map(), cavs_decode_frame(), cavs_flush(), cdg_decode_end(), cdg_decode_frame(), cdg_decode_init(), cdxl_decode_end(), cdxl_decode_frame(), cdxl_decode_init(), cinaudio_decode_frame(), cinaudio_decode_init(), cinepak_decode_end(), cinepak_decode_frame(), cinepak_decode_init(), cinvideo_decode_end(), cinvideo_decode_frame(), cinvideo_decode_init(), cllc_decode_close(), cllc_decode_frame(), cllc_decode_init(), close_decoder(), cmap_read_palette(), cmv_decode_end(), cmv_decode_frame(), cmv_decode_init(), cng_decode_close(), cng_decode_flush(), cng_decode_frame(), cng_decode_init(), cng_encode_close(), cng_encode_frame(), cng_encode_init(), codec_child_next(), codec_reinit(), codecctl_int(), commit_bitstream_and_slice_buffer(), common_init(), cook_decode_close(), cook_decode_frame(), cook_decode_init(), copy4h(), copy_frame(), count_colors(), cpia_decode_frame(), CustomSource::CustomSource(), cyuv_decode_end(), cyuv_decode_frame(), cyuv_decode_init(), dca_decode_end(), dca_decode_frame(), dca_decode_init(), decode(), decode_0(), decode_ac_coeffs(), decode_block(), decode_chunks(), decode_close(), decode_element(), decode_end(), decode_flush(), decode_frame(), decode_init(), decode_init_thread_copy(), decode_lowdelay_slice(), decode_packet(), decode_picture(), decode_picture_header(), decode_slice(), decode_slice_chroma(), decode_slice_luma(), decode_slice_thread(), decode_subband_arith(), decode_subband_golomb(), decode_tag(), decode_thread(), decode_update_thread_context(), decode_wmv9(), decoder_init(), determine_bitrate(), dfa_decode_end(), dfa_decode_frame(), dfa_decode_init(), dirac_decode_data_unit(), dirac_decode_flush(), dirac_decode_frame(), dirac_decode_init(), display_end_segment(), dnxhd_calc_bits_thread(), dnxhd_decode_close(), dnxhd_decode_frame(), dnxhd_decode_init(), dnxhd_encode_end(), dnxhd_encode_init(), dnxhd_encode_picture(), dnxhd_encode_thread(), dnxhd_mb_var_thread(), dnxhd_write_header(), dpcm_decode_frame(), dpcm_decode_init(), draw_char(), dv_decode_video_segment(), dv_encode_video_segment(), dvbsub_close_decoder(), dvbsub_decode(), dvbsub_display_end_segment(), dvbsub_encode(), dvbsub_init_decoder(), dvbsub_parse_clut_segment(), dvbsub_parse_display_definition_segment(), dvbsub_parse_object_segment(), dvbsub_parse_page_segment(), dvbsub_parse_pixel_data_block(), dvbsub_parse_region_segment(), dvdsub_decode(), dvdsub_init(), dvdsub_parse_extradata(), dvvideo_close(), dvvideo_decode_frame(), dxva2_h264_decode_slice(), dxva2_h264_end_frame(), dxva2_h264_start_frame(), dxva2_mpeg2_decode_slice(), dxva2_mpeg2_end_frame(), dxva2_mpeg2_start_frame(), dxva2_vc1_decode_slice(), dxva2_vc1_end_frame(), dxva2_vc1_start_frame(), eightsvx_decode_close(), eightsvx_decode_frame(), eightsvx_decode_init(), encode_close(), encode_dvd_subtitles(), encode_end(), encode_frame(), encode_gbrp10(), encode_gbrp12(), encode_init(), encode_init_ls(), encode_nals(), encode_picture_lossless(), encode_picture_ls(), encode_plane(), encode_rgb48_10bit(), encode_slice(), encode_slice_data(), encode_superframe(), end(), erase_line(), erase_screen(), escape124_decode_close(), escape124_decode_frame(), escape124_decode_init(), escape130_decode_close(), escape130_decode_frame(), escape130_decode_init(), evrc_decode_frame(), evrc_decode_init(), execute_code(), extract_header(), Faac_encode_close(), Faac_encode_frame(), Faac_encode_init(), ff_ac3_encode_close(), ff_ac3_encode_init(), ff_asv_common_init(), ff_cavs_end(), ff_cavs_init(), ff_dvvideo_init(), ff_frame_thread_encoder_init(), ff_h263_decode_end(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_decode_init(), ff_huffyuv_common_init(), ff_ivi_decode_close(), ff_ivi_decode_frame(), ff_mjpeg_decode_end(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_init(), ff_mpeg_flush(), ff_mpeg_update_thread_context(), ff_MPV_encode_end(), ff_MPV_encode_init(), ff_MPV_encode_picture(), ff_msmpeg4_decode_init(), ff_pnm_end(), ff_pnm_init(), ff_rv34_decode_end(), ff_rv34_decode_frame(), ff_rv34_decode_init(), ff_rv34_decode_init_thread_copy(), ff_rv34_decode_update_thread_context(), ff_snow_common_init_after_header(), ff_snow_release_buffer(), ff_vaapi_mpeg_end_frame(), ff_vc1_decode_end(), ff_vdpau_mpeg_end_frame(), ff_vdpau_vc1_decode_picture(), ff_vp56_decode_frame(), ff_vp56_decode_mbs(), ff_vp56_free(), ff_vp56_init(), ff_wma_end(), ff_wma_init(), ffv1_close(), ffv1_common_init(), fill_slice(), fill_slice_long(), find_quant_thread(), find_slice_quant(), finish_frame(), flac_decode_close(), flac_decode_frame(), flac_decode_init(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flashsv2_encode_end(), flashsv2_encode_frame(), flashsv2_encode_init(), flashsv_decode_block(), flashsv_decode_end(), flashsv_decode_frame(), flashsv_decode_init(), flashsv_encode_end(), flashsv_encode_frame(), flashsv_encode_init(), flic_decode_end(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flic_decode_init(), flush(), flush_dpb(), frame_configure_elements(), frame_thread_free(), frame_thread_init(), g722_decode_frame(), g722_decode_init(), g722_encode_close(), g722_encode_init(), g723_1_decode_frame(), g723_1_decode_init(), get_buffer(), get_nb_samples(), get_stats(), gif_decode_close(), gif_decode_frame(), gif_decode_init(), gif_encode_close(), gif_encode_frame(), gif_encode_init(), gif_image_write_image(), gsm_decode_block(), gsm_flush(), h261_decode_end(), h261_decode_frame(), h261_decode_init(), h264_decode_end(), hscroll(), idcin_decode_end(), idcin_decode_frame(), idcin_decode_init(), ilbc_decode_frame(), ilbc_decode_init(), ilbc_encode_frame(), ilbc_encode_init(), imc_decode_close(), imc_decode_frame(), imc_decode_init(), init(), init_ref(), ipvideo_decode_end(), ipvideo_decode_frame(), ipvideo_decode_init(), ir2_decode_end(), ir2_decode_frame(), ir2_decode_init(), j2kdec_init(), j2kenc_destroy(), j2kenc_init(), lag_decode_end(), lag_decode_frame(), lag_decode_init(), latm_decode_frame(), latm_decode_init(), libcelt_dec_close(), libcelt_dec_decode(), libcelt_dec_init(), libgsm_decode_close(), libgsm_decode_frame(), libgsm_decode_init(), libgsm_encode_close(), libgsm_encode_frame(), libgsm_encode_init(), libgsm_flush(), libopenjpeg_decode_close(), libopenjpeg_decode_frame(), libopenjpeg_decode_init(), libopenjpeg_decode_init_thread_copy(), libopenjpeg_encode_close(), libopenjpeg_encode_frame(), libopenjpeg_encode_init(), libopus_decode(), libopus_decode_close(), libopus_decode_init(), libopus_encode(), libopus_encode_close(), libopus_encode_init(), libopus_flush(), libschroedinger_decode_close(), libschroedinger_decode_frame(), libschroedinger_decode_init(), libschroedinger_encode_close(), libschroedinger_encode_frame(), libschroedinger_encode_init(), libschroedinger_flush(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), libspeex_decode_close(), libspeex_decode_flush(), libspeex_decode_frame(), libspeex_decode_init(), log_encoder_error(), mace_decode_frame(), mimic_decode_end(), mimic_decode_frame(), mimic_decode_init(), mimic_decode_update_thread_context(), mjpegb_decode_frame(), mlp_decode_init(), mm_decode_end(), mm_decode_frame(), mm_decode_init(), mov_text_encode_close(), mov_text_encode_frame(), mov_text_encode_init(), mp3lame_encode_close(), mp3lame_encode_frame(), mp3lame_encode_init(), mp_decode_end(), mp_decode_frame(), mp_decode_init(), MPA_encode_frame(), MPA_encode_init(), mpc7_decode_close(), mpc7_decode_flush(), mpc7_decode_frame(), mpc7_decode_init(), mpc8_decode_flush(), mpc8_decode_frame(), mpc8_decode_init(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg_decode_end(), mpeg_decode_frame(), mpeg_decode_gop(), mpeg_decode_init(), mpeg_decode_postinit(), mpeg_decode_update_thread_context(), mpeg_decode_user_data(), mpeg_get_pixelformat(), msrle_decode_end(), msrle_decode_frame(), msrle_decode_init(), mss1_decode_end(), mss1_decode_frame(), mss1_decode_init(), mss2_decode_end(), mss2_decode_frame(), mss2_decode_init(), mss3_decode_end(), mss3_decode_frame(), mss3_decode_init(), mss4_decode_end(), mss4_decode_frame(), mss4_decode_init(), msvideo1_decode_end(), msvideo1_decode_frame(), msvideo1_decode_init(), mvc_decode_frame(), mvc_decode_init(), mxpeg_decode_end(), mxpeg_decode_frame(), mxpeg_decode_init(), oggvorbis_decode_close(), oggvorbis_decode_frame(), oggvorbis_decode_init(), oggvorbis_encode_close(), oggvorbis_encode_frame(), oggvorbis_encode_init(), oggvorbis_init_encoder(), paf_vid_close(), paf_vid_decode(), paf_vid_init(), pam_encode_frame(), parse_palette_segment(), parse_picture_segment(), parse_presentation_segment(), pcm_decode_frame(), pcm_decode_init(), pcx_decode_frame(), pcx_encode_frame(), pcx_encode_init(), pcx_end(), pcx_init(), png_dec_end(), png_dec_init(), png_enc_init(), pnm_decode_frame(), pnm_encode_frame(), prores_encode_close(), prores_encode_init(), ptx_decode_frame(), ptx_end(), ptx_init(), put_audio_specific_config(), qcelp_decode_frame(), qcelp_decode_init(), qdm2_decode_close(), qdm2_decode_frame(), qdm2_decode_init(), qtrle_decode_end(), qtrle_decode_frame(), qtrle_decode_init(), qtrle_encode_end(), qtrle_encode_frame(), qtrle_encode_init(), queue_frames(), ra144_decode_frame(), ra144_decode_init(), ra144_encode_close(), ra144_encode_frame(), ra144_encode_init(), ra288_decode_frame(), ra288_decode_init(), raw_close_decoder(), raw_decode(), raw_init_decoder(), raw_init_encoder(), read_access_unit(), read_huffman_tree(), receive_frame(), render_charset(), rl2_decode_end(), rl2_decode_frame(), rl2_decode_init(), roq_decode_end(), roq_decode_frame(), roq_decode_init(), roq_dpcm_encode_close(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), roq_encode_end(), roq_encode_frame(), roq_encode_init(), rpza_decode_end(), rpza_decode_frame(), rpza_decode_init(), rv10_decode_end(), rv10_decode_frame(), rv10_decode_init(), rv10_decode_packet(), rv30_decode_init(), rv40_decode_init(), sami_close(), sami_decode_frame(), sami_init(), sami_paragraph_to_ass(), select_palette(), seqvideo_decode_end(), seqvideo_decode_frame(), seqvideo_decode_init(), set_chroma_format(), set_sample_rate_params(), sgi_end(), sgi_init(), shorten_decode_close(), shorten_decode_frame(), shorten_decode_init(), show_stream(), sipr_decode_frame(), sipr_decoder_init(), slice_end(), smc_decode_end(), smc_decode_frame(), smc_decode_init(), srt_encode_close(), srt_encode_frame(), srt_encode_init(), Stagefright_close(), Stagefright_decode_frame(), Stagefright_init(), submit_stats(), sunrast_decode_frame(), sunrast_encode_frame(), sunrast_encode_init(), sunrast_end(), sunrast_image_write_header(), sunrast_image_write_image(), sunrast_init(), svq1_decode_end(), svq1_decode_frame(), svq1_decode_frame_header(), svq1_decode_init(), svq1_encode_end(), svq1_encode_frame(), svq1_encode_init(), svq1_flush(), svq3_decode_end(), svq3_decode_frame(), svq3_decode_init(), svq3_decode_slice_header(), synth_frame(), synth_superframe(), tak_decode_close(), tak_decode_frame(), tak_decode_init(), targa_encode_init(), targa_end(), targa_init(), text_event_to_ass(), tgq_decode_end(), tgq_decode_frame(), tgq_decode_init(), tgv_decode_end(), tgv_decode_frame(), tgv_decode_init(), tiff_end(), tiff_init(), tmv_decode_close(), tmv_decode_frame(), tmv_decode_init(), tqi_decode_end(), tqi_decode_frame(), tqi_decode_init(), truemotion1_decode_end(), truemotion1_decode_frame(), truemotion1_decode_init(), truespeech_decode_frame(), truespeech_decode_init(), tscc2_decode_end(), tscc2_decode_frame(), tscc2_decode_init(), tta_decode_close(), tta_decode_frame(), tta_decode_init(), twin_decode_close(), twin_decode_frame(), twin_decode_init(), twolame_encode_close(), twolame_encode_frame(), twolame_encode_init(), txd_decode_frame(), txd_end(), txd_init(), ulti_decode_end(), ulti_decode_frame(), ulti_decode_init(), uninit(), unsupported(), update_frames(), utvideo_decode_close(), utvideo_decode_frame(), utvideo_decode_init(), utvideo_encode_close(), utvideo_encode_frame(), utvideo_encode_init(), vaapi_h264_decode_slice(), vaapi_h264_end_frame(), vaapi_h264_start_frame(), vaapi_mpeg2_decode_slice(), vaapi_mpeg2_start_frame(), vaapi_mpeg4_decode_slice(), vaapi_mpeg4_start_frame(), vaapi_vc1_decode_slice(), vaapi_vc1_start_frame(), vble_decode_close(), vble_decode_frame(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vcr1_common_init(), vcr1_decode_end(), vcr1_decode_frame(), vcr2_init_sequence(), vda_h264_end_frame(), vdadec_close(), vdadec_decode(), vdadec_init(), vdpau_h264_end_frame(), vdpau_h264_set_reference_frames(), vdpau_h264_start_frame(), vdpau_mpeg4_start_frame(), vdpau_mpeg_start_frame(), vdpau_vc1_start_frame(), video_encode_example(), vmdaudio_decode_frame(), vmdaudio_decode_init(), vmdvideo_decode_end(), vmdvideo_decode_frame(), vmdvideo_decode_init(), vorbis_decode_close(), vorbis_decode_flush(), vorbis_decode_frame(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_frame(), vorbis_encode_init(), vp3_decode_end(), vp3_decode_flush(), vp3_decode_frame(), vp3_decode_init(), vp3_init_thread_copy(), vp3_update_thread_context(), vp5_decode_init(), vp6_decode_free(), vp6_decode_init(), vp8_decode(), vp8_decode_flush_impl(), vp8_decode_frame(), vp8_decode_free(), vp8_decode_init(), vp8_decode_init_thread_copy(), vp8_decode_mb_row_no_filter(), vp8_decode_mb_row_sliced(), vp8_decode_mv_mb_modes(), vp8_decode_update_thread_context(), vp8_encode(), vp8_filter_mb_row(), vp8_free(), vpx_init(), vqa_decode_end(), vqa_decode_frame(), vqa_decode_init(), wavesynth_close(), wavesynth_decode(), wavesynth_init(), wavesynth_parse_extradata(), wavpack_decode_block(), wavpack_decode_end(), wavpack_decode_flush(), wavpack_decode_frame(), wavpack_decode_init(), wma_decode_init(), wma_decode_superframe(), wmavoice_decode_end(), wmavoice_decode_init(), wmavoice_decode_packet(), wmavoice_flush(), wmv2_decode_end(), wmv2_decode_init(), wmv2_encode_init(), wmv9_init(), X264_close(), X264_frame(), X264_init(), xan_decode_chroma(), xan_decode_end(), xan_decode_frame(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), XAVS_close(), XAVS_frame(), XAVS_init(), xface_decode_close(), xface_decode_frame(), xface_decode_init(), xface_encode_frame(), xvid_encode_close(), xvid_encode_frame(), xvid_encode_init(), yop_decode_close(), yop_decode_frame(), yop_decode_init(), zerocodec_decode_close(), zerocodec_decode_frame(), and zerocodec_decode_init().

struct AVCodecInternal* AVCodecContext::internal

Private context used for internal data.

Unlike priv_data, this is not codec-specific. It is used in general libavcodec functions.

Definition at line 1611 of file avcodec.h.

Referenced by audio_free_buffers(), audio_get_buffer(), avcodec_close(), avcodec_copy_context(), avcodec_decode_audio4(), avcodec_default_release_buffer(), avcodec_encode_audio2(), avcodec_encode_video2(), avcodec_is_open(), avcodec_open2(), decode_fill(), decode_init_thread_copy(), ff_alloc_packet2(), ff_frame_thread_encoder_free(), ff_frame_thread_encoder_init(), ff_MPV_common_end(), ff_rv34_decode_init_thread_copy(), ff_thread_video_encode_frame(), frame_thread_free(), frame_thread_init(), free_tables(), h264_decode_end(), libopus_decode_init(), libopus_flush(), mimic_decode_end(), video_free_buffers(), video_get_buffer(), vp3_decode_end(), vp8_decode_flush_impl(), and worker().

void* AVCodecContext::opaque

Private data of the user, can be used to carry app specific stuff.

• encoding: Set by user.
• decoding: Set by user.

Definition at line 1618 of file avcodec.h.

Referenced by codec_get_buffer(), init_input_stream(), update_context_from_user(), and video_thread().

int AVCodecContext::bit_rate

the average bitrate

• encoding: Set by user; unused for constant quantizer encoding.
• decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.

Examples:

doc/examples/decoding_encoding.c, and doc/examples/muxing.c.

Definition at line 1625 of file avcodec.h.

Referenced by aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), ac3_decode_frame(), add_av_stream(), add_codec(), add_stream(), aea_read_header(), amf_parse_object(), amr_read_packet(), amr_wb_encode_frame(), amr_wb_encode_init(), apc_read_header(), asf_read_header(), asf_write_header1(), audio_encode_example(), av_find_best_stream(), avcodec_open2(), avformat_new_stream(), avi_write_header(), avisynth_read_header(), avpriv_adx_decode_header(), avpriv_dv_init_demux(), avpriv_dv_produce_packet(), bfi_read_header(), cin_read_header(), compute_bandwidth(), compute_status(), daud_header(), dc1394_read_common(), dca_decode_frame(), decode_frame(), decode_ppc(), dv_extract_audio_info(), dv_extract_video_info(), ea_read_header(), encode_init(), estimate_timings_from_bit_rate(), Faac_encode_init(), fbdev_read_header(), ff_aac_ac3_parse(), ff_dnxhd_find_cid(), ff_dv_offset_reset(), ff_get_audio_frame_size(), ff_MPV_encode_init(), ff_pcm_read_seek(), ff_voc_get_packet(), ff_wma_init(), ff_xvid_rate_control_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), find_stream_in_feed(), flv_write_header(), fourxm_read_header(), get_aiff_header(), get_bit_rate(), get_mode(), get_sindex(), grab_read_header(), gsm_read_header(), gxf_write_header(), gxf_write_mpeg_auxiliary(), handle_file(), idcin_read_header(), iff_read_header(), ilbc_read_header(), init_bitstream_params(), ipmovie_read_header(), ism_write_header(), iss_read_header(), lame_window_init(), libgsm_encode_init(), libopus_configure_encoder(), libopus_encode_init(), libschroedinger_encode_init(), lxf_read_header(), matroska_read_header(), mlp_parse(), mmf_read_header(), modify_current_stream(), mov_build_index(), mov_read_header(), mov_write_esds_tag(), mov_write_isml_manifest(), mov_write_uuidprof_tag(), mp3_parse_vbr_tags(), mp3_write_xing(), mp3lame_encode_init(), MPA_encode_init(), mpeg_decode_postinit(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mpegts_read_header(), mpegvideo_extract_headers(), mtv_read_header(), mxf_write_d10_video_packet(), mxf_write_header(), mxf_write_mpegvideo_desc(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), oma_read_header(), optimum_dist(), optimum_use15_7(), parse_ffconfig(), parse_mpeg1waveformatex(), pcm_bluray_parse_header(), pcm_encode_init(), print_enc_params(), psy_3gpp_init(), psy_3gpp_window(), qcp_read_header(), qdm2_decode_init(), ra144_encode_init(), rawvideo_read_header(), read_desc_chunk(), read_header(), real_parse_asm_rule(), rl2_read_header(), rm_read_audio_stream_info(), rm_read_header(), rm_write_header(), roq_dpcm_encode_init(), roq_read_packet(), rv10_write_header(), s302m_parse_frame_header(), search_for_quantizers_twoloop(), seq_read_header(), show_stream(), sipr_decoder_init(), sox_read_header(), tmv_read_header(), transcode_init(), twin_decode_frame(), twin_decode_init(), twolame_encode_init(), v4l2_read_header(), validate_options(), vid_read_packet(), video_encode_example(), vivo_read_header(), vmd_read_header(), vorbis_encode_init(), vorbis_header(), vpx_init(), vqf_read_header(), vqf_read_seek(), wc3_read_header(), write_manifest(), wsaud_read_header(), x11grab_read_header(), X264_init(), xa_read_header(), XAVS_init(), xmv_read_header(), xvid_encode_init(), xwma_read_header(), and yop_read_header().

int AVCodecContext::bit_rate_tolerance

number of bits the bitstream is allowed to diverge from the reference.

      the reference can be CBR (for CBR pass1) or VBR (for pass2)

• encoding: Set by user; unused for constant quantizer encoding.
• decoding: unused

Definition at line 1633 of file avcodec.h.

Referenced by add_codec(), ff_MPV_encode_init(), ff_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), parse_ffconfig(), and XAVS_init().

int AVCodecContext::global_quality

Global quality for codecs which cannot change it per frame.

This should be proportional to MPEG-1/2/4 qscale.

• encoding: Set by user.
• decoding: unused

Definition at line 1641 of file avcodec.h.

Referenced by a64multi_init_encoder(), aac_encode_init(), config(), do_video_out(), encode_init(), Faac_encode_init(), lame_window_init(), libopenjpeg_encode_init(), libopus_configure_encoder(), libschroedinger_encode_init(), mp3lame_encode_init(), new_output_stream(), oggvorbis_init_encoder(), optimum_use15_7(), parse_ffconfig(), twolame_encode_init(), and vorbis_encode_init().

int AVCodecContext::compression_level

• encoding: Set by user.
• decoding: unused

Definition at line 1647 of file avcodec.h.

Referenced by alac_encode_init(), encode_frame(), encode_init(), flac_encode_init(), flashsv2_encode_init(), libopenjpeg_encode_init(), libopus_encode_init(), mp3lame_encode_init(), and print_enc_params().

int AVCodecContext::flags

CODEC_FLAG_*.

• encoding: Set by user.
• decoding: Set by user.

Examples:

doc/examples/decoding_encoding.c, and doc/examples/muxing.c.

Definition at line 1655 of file avcodec.h.

Referenced by aac_decode_init(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), ac3_decode_init(), add_input_streams(), add_stream(), alloc_buffer(), amv_encode_picture(), atrac1_decode_init(), atrac3_decode_init(), av_parser_change(), avcodec_encode_video2(), avcodec_string(), comp_block(), config(), configure_input_video_filter(), dca_decode_init(), dct_get(), decode_frame(), decode_init(), decode_slice_thread(), dirac_decode_init(), dnxhd_decode_macroblock(), dnxhd_encode_init(), do_video_out(), do_video_stats(), dsp_init(), dsputil_init_3dnow(), dsputil_init_mmxext(), dsputil_init_sse2(), dv_guess_dct_mode(), encode_frame(), encode_init(), encode_q_branch(), encode_slice_data(), estimate_best_b_count(), Faac_encode_init(), ff_ac3_encode_init(), ff_dnxhd_find_cid(), ff_draw_horiz_band(), ff_dsputil_init_pix_mmx(), ff_fmt_convert_init_altivec(), ff_fmt_convert_init_arm(), ff_fmt_convert_init_x86(), ff_h263_decode_frame(), ff_h264_decode_init(), ff_huffyuv_common_init(), ff_mjpeg_decode_frame(), ff_MPV_common_init(), ff_MPV_encode_init(), ff_proresdsp_x86_init(), ff_rv34_decode_init(), ff_snow_frame_start(), ff_thread_video_encode_frame(), ff_vp56_init_context(), ff_wma_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), ffv1_common_init(), flac_write_header(), get_flags(), h261_decode_frame(), idct_put(), imc_decode_init(), init_muxer(), intra_predict(), lame_window_init(), libschroedinger_encode_init(), load_input_picture(), main(), mjpeg_decode_scan(), mkv_write_attachments(), mkv_write_header(), mov_write_udta_tag(), mp3_write_xing(), mp3lame_encode_init(), mpeg_decode_init(), mxf_write_header(), mxf_write_identification(), new_output_stream(), new_video_stream(), ogg_write_header(), oggvorbis_encode_init(), oggvorbis_init_encoder(), parse_ffconfig(), print_report(), ra288_decode_init(), remove_extradata(), render_slice(), rtp_write_header(), rv10_decode_frame(), stream_component_open(), svq1_decode_frame(), svq1_encode_plane(), svq3_decode_init(), tgq_idct_put_mb(), tgq_idct_put_mb_dconly(), tqi_idct_put(), transcode_init(), twin_decode_init(), twolame_encode_init(), unpack_dct_coeffs(), update_context_from_user(), validate_thread_parameters(), vble_decode_frame(), vc1_decode_init(), video_decode_example(), video_get_buffer(), vorbis_decode_init(), vorbis_encode_init(), vp3_decode_init(), vp8_decode_frame(), vp8_decode_mb_row_no_filter(), vp8_encode(), vpx_init(), wmv9_init(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::flags2

CODEC_FLAG2_*.

• encoding: Set by user.
• decoding: Set by user.

Definition at line 1662 of file avcodec.h.

Referenced by av_parser_change(), decode_frame(), decode_nal_units(), decode_slice_header(), dump_extradata(), encode_422_bitstream(), encode_bgra_bitstream(), encode_frame(), encode_gray_bitstream(), encode_init(), ff_h263_decode_frame(), ff_h264_decode_nal(), ff_h264_decode_seq_parameter_set(), ff_mov_read_stsd_entries(), ff_MPV_common_init(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), h261_decode_frame(), mpeg_decode_init(), remove_extradata(), rv10_decode_frame(), stream_component_open(), update_context_from_user(), and validate_thread_parameters().

uint8_t* AVCodecContext::extradata

some codecs need / can use extradata like Huffman tables.

mjpeg: Huffman tables rv10: additional flags mpeg4: global headers (they can be in the bitstream or here) The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger than extradata_size to avoid prolems if it is read with the bitstream reader. The bytewise contents of extradata must not depend on the architecture or CPU endianness.

• encoding: Set/allocated/freed by libavcodec.
• decoding: Set/allocated/freed by user.

Definition at line 1675 of file avcodec.h.

Referenced by a64_write_header(), a64multi_encode_frame(), a64multi_init_encoder(), aac_adtstoasc_filter(), aac_decode_frame(), aac_decode_init(), aac_encode_close(), aac_encode_init(), aacPlus_encode_close(), aacPlus_encode_init(), aasc_decode_init(), add_av_stream1(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), adts_write_header(), adx_decode_init(), adx_read_header(), afc_read_header(), aiff_read_header(), aiff_write_header(), alac_encode_close(), alac_encode_init(), alac_set_info(), alloc_buffers(), apc_read_header(), ape_decode_init(), ape_read_header(), ape_tag_read_field(), asf_read_stream_properties(), asfrtp_parse_sdp_line(), ass_decode_init(), ass_encode_init(), atrac3_decode_init(), av_mpeg4_decode_header(), av_parser_change(), avcodec_close(), avcodec_copy_context(), avformat_find_stream_info(), avi_read_header(), avisynth_read_header(), avpriv_bprint_to_extradata(), avpriv_flac_is_extradata_valid(), avpriv_vorbis_parse_extradata(), avui_decode_frame(), avui_encode_init(), bfi_decode_frame(), bfi_read_header(), caf_write_header(), celt_header(), cmap_read_palette(), concatenate_packet(), cook_decode_init(), cook_parse(), decode_chunks(), decode_ext_header(), decode_flush(), decode_header_trees(), decode_init(), decode_init_thread_copy(), decode_stream_header(), dshow_add_device(), dump_attachment(), dump_extradata(), dvbsub_init_decoder(), dvdsub_parse_extradata(), encode_close(), encode_end(), encode_ext_header(), encode_init(), encode_intervals(), extract_header(), extract_mpeg4_header(), Faac_encode_close(), Faac_encode_init(), ff_free_stream(), ff_generate_avci_extradata(), ff_h263_decode_frame(), ff_h264_decode_init(), ff_mjpeg_decode_init(), ff_mov_read_stsd_entries(), ff_mov_write_packet(), ff_mp4_read_dec_config_descr(), ff_MPV_encode_end(), ff_mss12_decode_init(), ff_parse_mpeg2_descriptor(), ff_rm_read_mdpr_codecdata(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), flac_decode_init(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flac_header(), flac_read_header(), flic_decode_init(), flv_get_extradata(), flv_read_packet(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), fourxm_read_header(), get_aac_sample_rates(), get_codec_data(), get_private_data(), get_video_private_data(), h264_mp4toannexb_filter(), h264_parse(), idcin_decode_init(), idcin_read_header(), iff_read_header(), init(), jacosub_write_header(), latm_decode_audio_specific_config(), latm_decode_frame(), latm_write_frame_header(), latm_write_header(), latm_write_packet(), libcelt_dec_init(), libopus_decode_init(), libopus_encode_close(), libopus_encode_init(), libopus_write_header(), libspeex_decode_init(), matroska_read_header(), microdvd_init(), microdvd_read_header(), microdvd_write_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_codecprivate(), mov_create_chapter_track(), mov_read_dvc1(), mov_read_extradata(), mov_read_glbl(), mov_read_strf(), mov_read_wave(), mov_text_encode_init(), mov_write_extradata_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_subtitle_tag(), mp3_header_compress(), mp3_header_decompress(), mp_decode_frame(), mpc7_decode_init(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), mpeg_decode_frame(), mpegts_write_pmt(), msrle_decode_init(), mtv_read_header(), mvc_decode_init(), mxf_parse_structural_metadata(), new_stream(), nut_read_header(), ogg_build_opus_headers(), ogg_build_speex_headers(), ogg_write_header(), oggvorbis_decode_init(), oggvorbis_encode_close(), oggvorbis_encode_init(), ogm_header(), oma_read_header(), oma_write_header(), open_output_file(), opus_header(), parse_fmtp_config(), parse_media_type(), parse_mpeg1waveformatex(), parse_packed_headers(), parse_video_var(), put_audio_specific_config(), put_xiph_codecpriv(), qdm2_decode_init(), qdm2_parse_config(), raw_init_decoder(), read_audio_mux_element(), read_extra_header(), read_gab2_sub(), read_header(), read_kuki_chunk(), read_specific_config(), realtext_read_header(), rl2_decode_init(), rl2_read_header(), rm_read_extradata(), rv10_decode_init(), rv20_decode_picture_header(), rv30_decode_init(), rv30_parse_slice_header(), sdp_parse_fmtp_config_h264(), show_stream(), smacker_read_header(), smush_read_header(), speex_header(), Stagefright_close(), Stagefright_init(), subviewer_read_header(), svq3_decode_init(), svq3_parse_packet(), tak_read_header(), theora_header(), transcode(), transcode_init(), tta_decode_init(), tta_read_header(), twin_decode_init(), uninit(), utvideo_decode_init(), utvideo_encode_close(), utvideo_encode_init(), vc1_decode_init(), vc1t_read_header(), vc1test_write_header(), vdadec_init(), vfw_read_header(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_init(), vorbis_header(), vqa_decode_init(), vqf_read_header(), wavesynth_parse_extradata(), wavpack_decode_init(), wma_decode_init(), wmavoice_decode_init(), wmv2_encode_init(), write_extradata(), write_header(), write_streamheader(), write_trailer(), wsvqa_read_header(), wsvqa_read_packet(), X264_close(), X264_init(), XAVS_close(), XAVS_init(), xmv_process_packet_header(), xvid_encode_close(), xvid_encode_init(), xvid_strip_vol_header(), xwma_read_header(), yop_decode_init(), and yop_read_header().

int AVCodecContext::extradata_size

Definition at line 1676 of file avcodec.h.

Referenced by a64multi_init_encoder(), aac_adtstoasc_filter(), aac_decode_frame(), aac_decode_init(), aac_encode_init(), aacPlus_encode_init(), aasc_decode_init(), add_av_stream1(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), adts_write_header(), adx_decode_init(), adx_read_header(), afc_read_header(), aiff_read_header(), aiff_write_header(), alac_decode_init(), alac_encode_close(), alac_encode_init(), alac_set_info(), apc_read_header(), ape_decode_init(), ape_read_header(), ape_tag_read_field(), asf_read_stream_properties(), asf_write_header1(), asfrtp_parse_sdp_line(), ass_decode_init(), ass_encode_init(), atrac3_decode_init(), av_mpeg4_decode_header(), av_parser_change(), avcodec_copy_context(), avcodec_open2(), avformat_find_stream_info(), avi_read_header(), avisynth_read_header(), avpriv_bprint_to_extradata(), avpriv_flac_is_extradata_valid(), avpriv_vorbis_parse_extradata(), avui_decode_frame(), avui_encode_init(), bfi_decode_frame(), bfi_read_header(), caf_write_header(), celt_header(), cmap_read_palette(), concatenate_packet(), cook_decode_init(), cook_parse(), decode_ext_header(), decode_flush(), decode_header_trees(), decode_init(), decode_init_thread_copy(), decode_stream_header(), dshow_add_device(), dump_attachment(), dump_extradata(), dvbsub_init_decoder(), dvdsub_parse_extradata(), encode_close(), encode_ext_header(), encode_init(), encode_intervals(), extract_header(), extract_mpeg4_header(), Faac_encode_init(), ff_generate_avci_extradata(), ff_h263_decode_frame(), ff_h264_decode_init(), ff_mjpeg_decode_init(), ff_mov_read_stsd_entries(), ff_mov_write_packet(), ff_mp4_read_dec_config_descr(), ff_mss12_decode_init(), ff_parse_mpeg2_descriptor(), ff_rtp_send_aac(), ff_rtp_send_latm(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), flac_encode_close(), flac_encode_init(), flac_header(), flac_read_header(), flic_decode_init(), flv_get_extradata(), flv_read_packet(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), fourxm_read_header(), get_aac_sample_rates(), get_codec_data(), get_private_data(), get_video_private_data(), h264_mp4toannexb_filter(), h264_parse(), idcin_decode_init(), idcin_read_header(), iff_read_header(), init(), jacosub_write_header(), latm_decode_audio_specific_config(), latm_decode_frame(), latm_decode_init(), latm_write_frame_header(), latm_write_header(), libcelt_dec_init(), libopus_decode_init(), libopus_encode_init(), libspeex_decode_init(), m4sl_cb(), matroska_read_header(), microdvd_read_header(), microdvd_write_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_codecprivate(), mov_create_chapter_track(), mov_read_dvc1(), mov_read_extradata(), mov_read_glbl(), mov_read_strf(), mov_read_trak(), mov_read_wave(), mov_text_encode_init(), mov_write_extradata_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_subtitle_tag(), mp3_header_compress(), mp3_header_decompress(), mp_decode_init(), mpc7_decode_init(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), mpeg_decode_frame(), mpegts_write_header(), mpegts_write_pmt(), msrle_decode_init(), mtv_read_header(), mvc_decode_init(), new_stream(), nut_read_header(), ogg_build_opus_headers(), ogg_build_speex_headers(), ogg_write_header(), oggvorbis_decode_init(), oggvorbis_encode_init(), ogm_header(), oma_read_header(), oma_write_header(), open_output_file(), opus_header(), parse_fmtp_config(), parse_media_type(), parse_packed_headers(), parse_video_var(), put_audio_specific_config(), put_xiph_codecpriv(), qdm2_decode_init(), qdm2_parse_config(), raw_init_decoder(), read_extra_header(), read_header(), read_kuki_chunk(), read_specific_config(), realtext_read_header(), rl2_decode_init(), rl2_read_header(), rm_read_audio_stream_info(), rm_read_extradata(), rv10_decode_init(), rv20_decode_picture_header(), rv30_decode_init(), rv30_parse_slice_header(), sdp_parse_fmtp_config_h264(), show_stream(), smacker_read_header(), smush_read_header(), speex_header(), Stagefright_close(), Stagefright_decode_frame(), Stagefright_init(), svq3_decode_init(), svq3_parse_packet(), tak_read_header(), theora_header(), transcode_init(), tta_decode_init(), tta_read_header(), twin_decode_init(), uninit(), utvideo_decode_init(), utvideo_encode_init(), vc1_decode_init(), vc1t_read_header(), vdadec_init(), vfw_read_header(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_init(), vorbis_header(), vqa_decode_init(), vqf_read_header(), wavesynth_parse_extradata(), wavpack_decode_init(), wma_decode_init(), wmavoice_decode_init(), wmv2_encode_init(), write_extradata(), write_header(), write_streamheader(), write_trailer(), wsvqa_read_header(), wsvqa_read_packet(), X264_init(), XAVS_init(), xmv_process_packet_header(), xvid_encode_init(), xvid_strip_vol_header(), xwma_read_header(), yop_decode_init(), and yop_read_header().

AVRational AVCodecContext::time_base

This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.

For fixed-fps content, timebase should be 1/framerate and timestamp increments should be identically 1.

• encoding: MUST be set by user.
• decoding: Set by libavcodec.

Examples:

doc/examples/decoding_encoding.c, doc/examples/demuxing.c, doc/examples/filtering_video.c, and doc/examples/muxing.c.

Definition at line 1686 of file avcodec.h.

Referenced by add_av_stream(), add_codec(), add_stream(), av_mpeg4_decode_header(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), avi_write_header(), caca_write_header(), check_recording_time(), close_output_stream(), cmv_process_header(), compute_pkt_fields(), compute_pkt_fields2(), compute_status(), config(), configure_input_video_filter(), cpia_decode_init(), dc1394_read_common(), decode_audio(), decode_frame(), decode_packet(), decode_seq_header(), decode_sequence_header_adv(), decode_vol_header(), decode_vop_header(), dirac_header(), do_audio_out(), do_subtitle_out(), do_video_out(), do_video_stats(), dshow_add_device(), dump_stream_format(), dv_extract_video_info(), dvvideo_decode_frame(), encode_ext_header(), encode_init(), estimate_best_b_count(), fbdev_read_header(), ff_af_queue_add(), ff_choose_timebase(), ff_compute_frame_duration(), ff_flv_encode_picture_header(), ff_framehash_write_header(), ff_h261_encode_picture_header(), ff_h263_decode_picture_header(), ff_h263_encode_picture_header(), ff_h263_show_pict_info(), ff_h264_decode_init(), ff_mov_read_stsd_entries(), ff_mpeg4_encode_picture_header(), ff_MPV_encode_init(), ff_MPV_encode_picture(), ff_msmpeg4_encode_ext_header(), ff_raw_video_read_header(), ff_samples_to_time_base(), ff_set_mpeg4_time(), ff_vdpau_mpeg4_decode_picture(), ff_xvid_rate_control_init(), ff_xvid_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), find_frame_rate_index(), flush_encoders(), flv_write_header(), get_fps(), get_video_format_idx(), gif_write_video(), grab_read_header(), h261_decode_picture_header(), h264_slice_header_init(), init_filters(), init_muxer(), init_pts(), lavfi_read_header(), libschroedinger_encode_init(), libschroedinger_handle_first_access_unit(), main(), microdvd_decode_frame(), microdvd_write_header(), mkv_write_tracks(), mov_create_timecode_track(), mov_get_dv_codec_tag(), mov_text_decode_frame(), mov_write_dvc1_structs(), mov_write_header(), mov_write_tmcd_tag(), mov_write_uuidprof_tag(), mpeg4_encode_gop_header(), mpeg4_encode_vol_header(), mpeg_decode_postinit(), mpegts_write_header(), mpegvideo_extract_headers(), mpegvideo_parse(), mpl2_decode_frame(), mxf_write_header(), ogg_write_header(), oggvorbis_decode_init(), opt_target(), optimum_dist(), optimum_use15_7(), output_packet(), parse_ffconfig(), parse_forced_key_frames(), parse_packet(), parse_source_parameters(), parse_timecode_in_framenum_format(), reap_filters(), rm_write_header(), rtp_write_header(), sami_decode_frame(), set_frame_distances(), show_stream(), srt_decode_frame(), swf_write_header(), tb_unreliable(), text_decode_frame(), tgq_decode_init(), tgv_decode_init(), tqi_decode_init(), transcode_init(), txd_read_header(), update_context_from_thread(), vaapi_mpeg4_start_frame(), vdpau_mpeg4_start_frame(), vfw_read_header(), video_encode_example(), vpx_init(), webvtt_decode_frame(), write_streaminfo(), write_trailer(), x11grab_read_header(), X264_init(), XAVS_init(), xvid_correct_framerate(), and xvid_encode_init().

int AVCodecContext::ticks_per_frame

For some codecs, the time base is closer to the field rate than the frame rate.

Most notably, H.264 and MPEG-2 specify time_base as half of frame duration if no telecine is used ...

Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.

Definition at line 1695 of file avcodec.h.

Referenced by avformat_find_stream_info(), compute_pkt_fields2(), configure_input_video_filter(), decode_sequence_header_adv(), ff_compute_frame_duration(), ff_h264_decode_init(), ff_msmpeg4_encode_ext_header(), get_fps(), mpeg_decode_postinit(), optimum_dist(), optimum_use15_7(), output_packet(), transcode_init(), update_context_from_thread(), vc1_extract_headers(), and vp8_encode().

int AVCodecContext::delay

Codec delay.

Encoding: Number of frames delay there will be from the encoder input to the decoder output. (we assume the decoder matches the spec) Decoding: Number of frames delay in addition to what a standard decoder as specified in the spec would produce.

Video: Number of frames the decoded output will be delayed relative to the encoded input.

Audio: For encoding, this is the number of "priming" samples added to the beginning of the stream. The decoded output will be delayed by this many samples relative to the input to the encoder. Note that this field is purely informational and does not directly affect the pts output by the encoder, which should always be based on the actual presentation time, including any delay. For decoding, this is the number of samples the decoder needs to output before the decoder's output is valid. When seeking, you should start decoding this many samples prior to your desired seek point.

• encoding: Set by libavcodec.
• decoding: Set by libavcodec.

Definition at line 1723 of file avcodec.h.

Referenced by aac_encode_init(), amr_wb_encode_frame(), amr_wb_encode_init(), encode_frame(), encode_init(), encode_superframe(), Faac_encode_init(), ff_ac3_encode_init(), ff_af_queue_init(), ff_MPV_encode_init(), g722_encode_init(), libopus_decode_init(), libopus_encode_init(), libopus_write_header(), mp3_write_xing(), mp3lame_encode_init(), MPA_encode_frame(), MPA_encode_init(), ogg_write_packet(), oggvorbis_encode_frame(), ra144_encode_init(), and update_context_from_thread().

int AVCodecContext::width

picture width / height.

• encoding: MUST be set by user.
• decoding: Set by libavcodec. Note: For compatibility it is possible to set this instead of coded_width/height before decoding.

Examples:

doc/examples/decoding_encoding.c, doc/examples/demuxing.c, doc/examples/filtering_video.c, and doc/examples/muxing.c.

Definition at line 1734 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), add_av_stream(), add_codec(), add_input_streams(), add_stream(), alloc_buffer(), amf_parse_object(), apply_param_change(), asf_read_stream_properties(), asf_write_header1(), aura_decode_frame(), aura_decode_init(), av_mpeg4_decode_header(), avcodec_decode_video2(), avcodec_default_reget_buffer(), avcodec_encode_video2(), avcodec_open2(), avcodec_set_dimensions(), avcodec_string(), avi_read_header(), avi_write_header(), avisynth_read_header(), avpriv_dv_codec_profile(), avs_read_packet(), avui_decode_frame(), avui_encode_frame(), avui_encode_init(), bethsoftvid_decode_frame(), bfi_decode_frame(), bfi_decode_init(), bfi_read_header(), bink_decode_plane(), binkb_decode_plane(), bitline2chunky(), bitplanar2chunky(), bmp_decode_frame(), bmp_encode_frame(), bmv_read_header(), brpix_decode_frame(), caca_write_header(), cdg_decode_init(), cdxl_decode_frame(), cdxl_decode_ham6(), cdxl_decode_ham8(), cdxl_read_packet(), cin_read_header(), cinepak_decode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), cmv_decode_inter(), cmv_decode_intra(), cmv_process_header(), codec_get_buffer(), codec_reinit(), common_init(), compute_status(), config(), configure_output_video_filter(), copy4h(), copy_color_mask(), copy_src_mask(), CustomSource::CustomSource(), cyuv_decode_init(), dc1394_read_common(), decode_0(), decode_13(), decode_block(), decode_frame(), decode_frame_header(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_p_frame(), decode_packet(), decode_picture_header(), decode_seq_header(), decode_sequence_header_adv(), decode_stream_header(), decode_thread(), decode_update_thread_context(), decode_video(), decode_write_frame(), dfa_decode_frame(), dfa_decode_init(), dfa_read_header(), dnxhd_decode_frame(), dnxhd_encode_init(), dnxhd_mb_var_thread(), dnxhd_write_header(), do_video_stats(), draw_char(), dshow_add_device(), dump_stream_format(), dv_write_pack(), dvbsub_parse_display_definition_segment(), dvdsub_init(), dvvideo_init_encoder(), dxa_read_header(), ea_read_header(), encode_frame(), encode_gbrp10(), encode_gbrp12(), encode_init(), encode_picture_ls(), encode_rgb48_10bit(), encode_slice(), erase_screen(), escape124_decode_frame(), escape124_decode_init(), escape130_decode_frame(), escape130_decode_init(), estimate_best_b_count(), execute_code(), fbdev_read_header(), ff_asv_common_init(), ff_ccitt_unpack(), ff_create_schro_frame(), ff_dnxhd_find_cid(), ff_generate_avci_extradata(), ff_huffyuv_common_init(), ff_init_buffer_info(), ff_mov_read_stsd_entries(), ff_mpeg_update_thread_context(), ff_MPV_encode_init(), ff_MPV_frame_start(), ff_msmpeg4_decode_init(), ff_mss12_decode_init(), ff_pnm_decode_header(), ff_print_debug_info2(), ff_rm_read_mdpr_codecdata(), ff_rtp_send_jpeg(), ff_rv34_decode_init(), ff_sauce_read(), ff_snow_alloc_blocks(), ff_snow_common_init_after_header(), ff_snow_frame_start(), ff_thread_video_encode_frame(), ff_vp56_decode_frame(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), ffv1_common_init(), ffv1_init_slice_contexts(), fill_picture_parameters(), film_read_header(), find_slice_quant(), find_stream_in_feed(), flashsv2_encode_init(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), fourxm_read_header(), frm_read_header(), frm_read_packet(), get_siz(), get_video_format_idx(), get_video_page_offset(), gif_encode_frame(), gif_encode_init(), gif_image_write_header(), gif_image_write_image(), gif_read_header(), gif_write_header(), gif_write_video(), grab_read_header(), h264_slice_header_init(), halfpel_interpol(), handle_file(), has_codec_parameters(), hscroll(), ico_check_attributes(), ico_write_packet(), idcin_decode_vlcs(), idcin_read_header(), iff_read_header(), img_read_header(), img_read_packet(), init(), init_bundles(), init_filters(), init_image(), init_muxer(), init_stream(), ipmovie_read_header(), ipvideo_decode_frame(), ipvideo_decode_opcodes(), ir2_decode_frame(), ivf_write_header(), j2kenc_init(), lag_decode_arith_plane(), lag_decode_frame(), lavfi_read_header(), libopenjpeg_copy_packed16(), libopenjpeg_copy_packed8(), libopenjpeg_copy_unpacked16(), libopenjpeg_copy_unpacked8(), libopenjpeg_encode_frame(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), lvf_read_header(), main(), matroska_read_header(), mca(), mimic_decode_frame(), mj2_create_image(), mkv_write_tracks(), mm_decode_inter(), mm_decode_intra(), modplug_read_header(), motion_compensation(), mov_get_dv_codec_tag(), mov_read_trak(), mov_write_avid_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_tapt_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), mov_write_video_tag(), movie_config_output_props(), mp_decode_frame(), mp_decode_frame_helper(), mp_decode_init(), mp_decode_line(), mp_read_changes_map(), mpegvideo_extract_headers(), msrle_decode_frame(), msrle_decode_pal4(), mss1_decode_frame(), mss2_decode_frame(), mss3_decode_frame(), mss3_decode_init(), mss4_decode_frame(), mss4_decode_init(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), mtv_read_header(), mvc_decode_frame(), mvc_decode_init(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_write_cdci_common(), new_subtitle_stream(), new_video_stream(), nsv_parse_NSVs_header(), nut_read_header(), nuv_header(), ogm_dshow_header(), ogm_header(), open_output_file(), open_video(), paf_vid_decode(), paf_vid_init(), pam_encode_frame(), parse_ffconfig(), parse_h264_sdp_line(), parse_picture(), parse_picture_segment(), parse_presentation_segment(), parse_video_var(), pcx_decode_frame(), pcx_encode_frame(), pmp_header(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), print_report(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), ptx_decode_frame(), qtrle_encode_frame(), qtrle_encode_init(), r3d_read_red1(), raw_decode(), raw_encode(), raw_init_decoder(), rawvideo_read_header(), rawvideo_read_packet(), read_argb_line(), read_frame(), read_header(), read_packet(), read_rgb24_component_line(), read_seek(), receive_frame(), rl2_decode_init(), rl2_read_header(), rl2_rle_decode(), roq_decode_frame(), roq_decode_init(), roq_encode_init(), roq_read_packet(), rpl_read_header(), rpza_decode_stream(), rv10_write_header(), sdl_write_header(), sdl_write_packet(), seq_read_header(), sgirle_decode_frame(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_stream(), smjpeg_write_header(), smush_read_header(), sp5x_decode_frame(), Stagefright_init(), str_read_packet(), sub2video_prepare(), sunrast_decode_frame(), sunrast_encode_init(), sunrast_image_write_header(), sunrast_image_write_image(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_init(), swf_read_packet(), swf_write_header(), swf_write_video(), targa_encode_frame(), tgq_decode_frame(), tgv_decode_frame(), tgv_decode_inter(), theora_header(), thp_read_header(), tm2_decode_blocks(), tm2_motion_block(), tmv_decode_frame(), tmv_read_header(), to_meta_with_crop(), tqi_decode_frame(), transcode_init(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), truemotion1_decode_header(), truemotion1_decode_init(), tscc2_decode_init(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), update_dimensions(), utvideo_decode_frame(), utvideo_decode_init(), utvideo_encode_frame(), utvideo_encode_init(), v308_decode_frame(), v308_decode_init(), v308_encode_frame(), v308_encode_init(), v408_decode_frame(), v408_encode_frame(), v410_decode_frame(), v410_decode_init(), v410_encode_frame(), v410_encode_init(), v4l2_read_header(), vb_decode_framedata(), vble_decode_frame(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vc1t_read_header(), vc1test_write_header(), vcr1_decode_frame(), vcr1_decode_init(), vdadec_init(), vfw_read_header(), video_encode_example(), video_get_buffer(), vivo_read_header(), vmd_decode(), vp3_decode_init(), vp8_decode(), vpx_init(), wc3_read_header(), write_manifest(), write_packet(), write_streamheader(), write_trailer(), write_video_frame(), wsvqa_read_header(), x11grab_read_header(), X264_init(), xan_decode_chroma(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), xan_wc3_copy_pixel_run(), xan_wc3_decode_frame(), xan_wc3_output_pixel_run(), XAVS_init(), xbm_decode_frame(), xbm_encode_frame(), xface_decode_init(), xface_encode_frame(), xiph_parse_fmtp_pair(), xmv_read_header(), xvid_encode_frame(), xvid_encode_init(), xwd_decode_frame(), xwd_encode_frame(), y216_decode_frame(), y41p_decode_frame(), y41p_decode_init(), y41p_encode_frame(), y41p_encode_init(), yop_decode_frame(), yop_decode_init(), yop_read_header(), yuv4_decode_frame(), yuv4_encode_frame(), yuv4_read_header(), yuv4_read_packet(), zero12v_decode_frame(), zerocodec_decode_frame(), and zmbv_me().

int AVCodecContext::height

Examples:

doc/examples/decoding_encoding.c, doc/examples/demuxing.c, doc/examples/filtering_video.c, and doc/examples/muxing.c.

Definition at line 1734 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), add_av_stream(), add_codec(), add_input_streams(), add_stream(), alloc_buffer(), amf_parse_object(), apply_param_change(), asf_read_stream_properties(), asf_write_header1(), aura_decode_frame(), av_mpeg4_decode_header(), avcodec_decode_video2(), avcodec_default_reget_buffer(), avcodec_encode_video2(), avcodec_open2(), avcodec_set_dimensions(), avcodec_string(), avi_read_header(), avi_write_header(), avisynth_read_header(), avpriv_dv_codec_profile(), avs_read_packet(), avui_decode_frame(), avui_encode_frame(), avui_encode_init(), bethsoftvid_decode_frame(), bfi_decode_frame(), bfi_decode_init(), bfi_read_header(), bink_decode_plane(), binkb_decode_plane(), bitline2chunky(), bitplanar2chunky(), bmp_decode_frame(), bmp_encode_frame(), bmv_read_header(), brpix_decode_frame(), caca_write_header(), cdg_decode_frame(), cdg_decode_init(), cdxl_decode_frame(), cdxl_decode_ham6(), cdxl_decode_ham8(), cdxl_read_packet(), cin_read_header(), cinepak_decode_init(), cinepak_decode_vectors(), cinvideo_decode_frame(), cinvideo_decode_init(), cmv_decode_inter(), cmv_decode_intra(), cmv_process_header(), codec_get_buffer(), codec_reinit(), common_init(), comp_block(), compute_status(), config(), configure_output_video_filter(), CustomSource::CustomSource(), cyuv_decode_init(), dc1394_read_common(), decode_0(), decode_13(), decode_argb_frame(), decode_frame(), decode_frame_header(), decode_header(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_p_block(), decode_p_frame(), decode_packet(), decode_picture_header(), decode_rgb24_frame(), decode_seq_header(), decode_sequence_header_adv(), decode_stream_header(), decode_thread(), decode_update_thread_context(), decode_video(), decode_write_frame(), dfa_decode_frame(), dfa_decode_init(), dfa_read_header(), dnxhd_decode_frame(), dnxhd_encode_init(), dnxhd_get_blocks(), dnxhd_mb_var_thread(), dnxhd_write_header(), do_video_stats(), draw_char(), dshow_add_device(), dump_stream_format(), dv_write_pack(), dvbsub_parse_display_definition_segment(), dvdsub_init(), dvvideo_init_encoder(), dxa_read_header(), dxva2_h264_end_frame(), dxva2_mpeg2_end_frame(), dxva2_vc1_end_frame(), ea_read_header(), encode_frame(), encode_gbrp10(), encode_gbrp12(), encode_init(), encode_picture_ls(), encode_rgb48_10bit(), encode_slice(), erase_screen(), escape124_decode_init(), escape130_decode_frame(), escape130_decode_init(), estimate_best_b_count(), execute_code(), fbdev_read_header(), ff_asv_common_init(), ff_create_schro_frame(), ff_dnxhd_find_cid(), ff_draw_horiz_band(), ff_get_logical_cpus(), ff_h264_draw_horiz_band(), ff_huffyuv_common_init(), ff_init_buffer_info(), ff_mjpeg_decode_sof(), ff_mov_read_stsd_entries(), ff_mpeg_update_thread_context(), ff_MPV_encode_init(), ff_MPV_frame_start(), ff_msmpeg4_decode_init(), ff_mss12_decode_init(), ff_pnm_decode_header(), ff_print_debug_info2(), ff_rm_read_mdpr_codecdata(), ff_rtp_send_jpeg(), ff_rv34_decode_init(), ff_sauce_read(), ff_snow_alloc_blocks(), ff_snow_common_init_after_header(), ff_snow_frame_start(), ff_thread_video_encode_frame(), ff_vaapi_mpeg_end_frame(), ff_vdpau_h264_picture_complete(), ff_vdpau_mpeg4_decode_picture(), ff_vdpau_mpeg_end_frame(), ff_vdpau_mpeg_picture_complete(), ff_vdpau_vc1_decode_picture(), ff_vp56_decode_frame(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), ffv1_common_init(), ffv1_init_slice_contexts(), fill_picture_parameters(), film_read_header(), find_slice_quant(), find_stream_in_feed(), flashsv2_encode_init(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flip(), fourxm_read_header(), frm_read_header(), frm_read_packet(), get_siz(), get_video_format_idx(), gif_encode_frame(), gif_encode_init(), gif_image_write_header(), gif_image_write_image(), gif_read_header(), gif_write_header(), gif_write_video(), grab_read_header(), gxf_find_lines_index(), gxf_write_header(), gxf_write_mpeg_auxiliary(), h264_slice_header_init(), halfpel_interpol(), handle_file(), hscroll(), ico_check_attributes(), ico_write_packet(), idcin_decode_vlcs(), idcin_read_header(), iff_read_header(), img_read_header(), img_read_packet(), import_format(), init(), init_bundles(), init_filters(), init_image(), init_muxer(), init_stream(), ipmovie_read_header(), ipvideo_decode_frame(), ipvideo_decode_opcodes(), ir2_decode_frame(), ivf_write_header(), j2kenc_init(), lag_decode_frame(), lavfi_read_header(), libopenjpeg_copy_packed16(), libopenjpeg_copy_packed8(), libopenjpeg_copy_unpacked16(), libopenjpeg_copy_unpacked8(), libopenjpeg_encode_frame(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), lvf_read_header(), main(), matroska_read_header(), mca(), mimic_decode_frame(), mj2_create_image(), mkv_write_tracks(), mm_decode_inter(), mm_decode_intra(), modplug_read_header(), motion_compensation(), mov_get_dv_codec_tag(), mov_read_trak(), mov_write_avid_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_tapt_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), movie_config_output_props(), mp_decode_frame(), mp_decode_frame_helper(), mp_decode_init(), mp_read_changes_map(), mpegvideo_extract_headers(), msrle_decode_8_16_24_32(), msrle_decode_frame(), msrle_decode_pal4(), mss1_decode_frame(), mss2_decode_frame(), mss2_decode_init(), mss3_decode_frame(), mss3_decode_init(), mss4_decode_frame(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), mtv_read_header(), mvc_decode_frame(), mvc_decode_init(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_write_cdci_common(), new_subtitle_stream(), new_video_stream(), nsv_parse_NSVs_header(), nut_read_header(), nuv_header(), ogm_dshow_header(), ogm_header(), open_output_file(), open_video(), paf_vid_decode(), paf_vid_init(), pam_encode_frame(), parse_ffconfig(), parse_h264_sdp_line(), parse_picture(), parse_picture_segment(), parse_presentation_segment(), parse_video_var(), pcx_decode_frame(), pcx_encode_frame(), pmp_header(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), prepare_avpic(), print_report(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), ptx_decode_frame(), qtrle_decode_16bpp(), qtrle_decode_1bpp(), qtrle_decode_24bpp(), qtrle_decode_2n4bpp(), qtrle_decode_32bpp(), qtrle_decode_8bpp(), qtrle_decode_frame(), qtrle_encode_frame(), qtrle_encode_init(), r3d_read_red1(), raw_decode(), raw_encode(), raw_init_decoder(), rawvideo_read_header(), rawvideo_read_packet(), read_frame(), read_header(), read_packet(), read_seek(), receive_frame(), rl2_decode_init(), rl2_read_header(), rl2_rle_decode(), roq_decode_frame(), roq_decode_init(), roq_encode_init(), roq_read_packet(), rpl_read_header(), rpza_decode_stream(), rv10_write_header(), sdl_write_header(), sdl_write_packet(), seq_read_header(), sgirle_decode_frame(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_stream(), smjpeg_write_header(), smush_read_header(), sp5x_decode_frame(), Stagefright_init(), str_read_packet(), sub2video_prepare(), sunrast_decode_frame(), sunrast_encode_init(), sunrast_image_write_header(), sunrast_image_write_image(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_frame(), svq3_decode_init(), swf_write_header(), swf_write_video(), targa_encode_frame(), tgq_decode_frame(), tgv_decode_frame(), tgv_decode_inter(), theora_header(), thp_read_header(), tm2_decode_blocks(), tm2_motion_block(), tmv_decode_frame(), tmv_read_header(), to_meta_with_crop(), tqi_decode_frame(), transcode_init(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), truemotion1_decode_header(), tscc2_decode_init(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), update_dimensions(), utvideo_decode_frame(), utvideo_decode_init(), utvideo_encode_frame(), utvideo_encode_init(), v308_decode_frame(), v308_encode_frame(), v408_decode_frame(), v408_encode_frame(), v410_decode_frame(), v410_encode_frame(), v4l2_read_header(), vaapi_h264_end_frame(), vb_decode_framedata(), vble_decode_frame(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vc1t_read_header(), vc1test_write_header(), vcr1_decode_frame(), vcr1_decode_init(), vdadec_init(), vdpau_h264_end_frame(), vfw_read_header(), video_encode_example(), video_get_buffer(), vivo_read_header(), vmd_decode(), vp3_decode_init(), vp3_draw_horiz_band(), vp8_decode(), vpx_init(), wc3_read_header(), write_manifest(), write_packet(), write_streamheader(), write_trailer(), write_video_frame(), wsvqa_read_header(), x11grab_read_header(), X264_init(), xan_decode_chroma(), xan_decode_frame(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), xan_wc3_copy_pixel_run(), xan_wc3_decode_frame(), XAVS_init(), xbm_decode_frame(), xbm_encode_frame(), xface_decode_init(), xface_encode_frame(), xiph_parse_fmtp_pair(), xmv_read_header(), xvid_encode_frame(), xvid_encode_init(), xwd_decode_frame(), xwd_encode_frame(), y216_decode_frame(), y41p_decode_frame(), y41p_encode_frame(), yop_decode_frame(), yop_decode_init(), yop_read_header(), yuv4_decode_frame(), yuv4_encode_frame(), yuv4_read_header(), yuv4_read_packet(), zero12v_decode_frame(), zerocodec_decode_frame(), and zmbv_me().

int AVCodecContext::coded_width

Bitstream width / height, may be different from width/height if lowres enabled.

• encoding: unused
• decoding: Set by user before init if known. Codec should override / dynamically change if needed.

Definition at line 1741 of file avcodec.h.

Referenced by av_mpeg4_decode_header(), avcodec_decode_video2(), avcodec_open2(), avcodec_set_dimensions(), avpriv_dv_codec_profile(), avpriv_dv_frame_profile2(), decode_init(), decode_slice_header(), decode_update_thread_context(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_mpeg_update_thread_context(), ff_mss12_decode_init(), ff_vp56_decode_frame(), h261_decode_frame(), h261_decode_init(), h264_slice_header_init(), mpeg_decode_postinit(), mpegvideo_extract_headers(), rv10_decode_init(), sp5x_decode_frame(), update_context_from_thread(), update_dimensions(), vaapi_vc1_start_frame(), vc1_decode_frame(), vc1_decode_init(), vc1_interp_mc(), vc1_mc_1mv(), vc1_mc_4mv_chroma(), vc1_mc_4mv_chroma4(), vc1_mc_4mv_luma(), vcr2_init_sequence(), and vp56_size_changed().

int AVCodecContext::coded_height

Definition at line 1741 of file avcodec.h.

Referenced by av_mpeg4_decode_header(), avcodec_decode_video2(), avcodec_open2(), avcodec_set_dimensions(), avpriv_dv_codec_profile(), avpriv_dv_frame_profile2(), decode_init(), decode_slice_header(), decode_update_thread_context(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_mjpeg_decode_init(), ff_mpeg_update_thread_context(), ff_mss12_decode_init(), ff_vp56_decode_frame(), h261_decode_frame(), h261_decode_init(), h264_slice_header_init(), mpeg_decode_postinit(), mpegvideo_extract_headers(), rv10_decode_init(), sp5x_decode_frame(), update_context_from_thread(), update_dimensions(), vaapi_vc1_start_frame(), vc1_decode_frame(), vc1_decode_init(), vc1_interp_mc(), vc1_mc_1mv(), vc1_mc_4mv_chroma(), vc1_mc_4mv_chroma4(), vc1_mc_4mv_luma(), vcr2_init_sequence(), and vp56_size_changed().

int AVCodecContext::gop_size

the number of pictures in a group of pictures, or 0 for intra_only

• encoding: Set by user.
• decoding: unused

Examples:

doc/examples/decoding_encoding.c, and doc/examples/muxing.c.

Definition at line 1750 of file avcodec.h.

Referenced by add_av_stream(), add_stream(), config(), encode_frame(), encode_init(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), flashsv2_encode_frame(), flashsv_encode_frame(), libschroedinger_encode_init(), mxf_get_mpeg2_codec_ul(), new_video_stream(), parse_ffconfig(), qtrle_encode_frame(), recommend_keyframe(), roq_encode_frame(), svq1_encode_frame(), video_encode_example(), vpx_init(), X264_init(), XAVS_init(), and xvid_encode_init().

enum AVPixelFormat AVCodecContext::pix_fmt

Pixel format, see AV_PIX_FMT_xxx.

May be set by the demuxer if known from headers. May be overridden by the decoder if it knows better.

• encoding: Set by user.
• decoding: Set by user if known, overridden by libavcodec if known

Examples:

doc/examples/decoding_encoding.c, doc/examples/demuxing.c, doc/examples/filtering_video.c, and doc/examples/muxing.c.

Definition at line 1759 of file avcodec.h.

Referenced by aasc_decode_frame(), aasc_decode_init(), add_input_streams(), add_stream(), alloc_buffer(), aura_decode_init(), avcodec_align_dimensions(), avcodec_align_dimensions2(), avcodec_decode_video2(), avcodec_default_reget_buffer(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), avpriv_dv_codec_profile(), avs_decode_init(), avui_decode_init(), bethsoftvid_decode_init(), bfi_decode_init(), bfi_read_header(), bmp_decode_frame(), bmp_encode_frame(), bmp_encode_init(), bmv_read_header(), brpix_decode_frame(), caca_write_header(), cdg_decode_init(), cdxl_decode_frame(), choose_pix_fmts(), cinepak_decode_init(), cinvideo_decode_init(), cllc_decode_frame(), cmv_decode_init(), codec_get_buffer(), config(), copy_frame(), cpia_decode_init(), cyuv_decode_frame(), dc1394_read_common(), decode_frame(), decode_frame_header(), decode_header(), decode_init(), decode_packet(), decode_plane(), decode_slice(), decode_slice_header(), decode_slice_thread(), decode_thread(), decode_video(), decode_wmv9(), dfa_decode_init(), dirac_decode_data_unit(), dnxhd_decode_header(), dnxhd_encode_init(), dshow_add_device(), dvvideo_decode_frame(), dvvideo_init_encoder(), encode_frame(), encode_init(), encode_init_ls(), encode_picture_lossless(), encode_picture_ls(), encode_slice(), escape124_decode_init(), escape130_decode_init(), estimate_best_b_count(), extract_header(), fbdev_read_header(), ff_cavs_init(), ff_create_schro_frame(), ff_draw_horiz_band(), ff_h263_decode_init(), ff_h264_draw_horiz_band(), ff_init_buffer_info(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_sof(), ff_mjpeg_decode_sos(), ff_mjpeg_encode_picture_header(), ff_MPV_common_init(), ff_MPV_encode_init(), ff_MPV_frame_end(), ff_MPV_frame_start(), ff_pnm_decode_header(), ff_print_debug_info2(), ff_rtp_send_jpeg(), ff_rv34_decode_init(), ff_snow_common_init_after_header(), ff_thread_video_encode_frame(), ff_vp56_init_context(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), flashsv_decode_init(), flic_decode_frame(), flic_decode_init(), frm_read_header(), frm_read_packet(), get_pixel_format(), get_siz(), gif_decode_init(), gif_write_header(), grab_read_header(), gxf_write_header(), gxf_write_mpeg_auxiliary(), gxf_write_umf_media_mpeg(), h261_decode_init(), h264_slice_header_init(), has_codec_parameters(), ico_check_attributes(), ico_write_trailer(), idcin_decode_init(), iff_read_header(), img_read_header(), init(), init_decoder(), init_filters(), init_image(), ipvideo_decode_init(), ir2_decode_init(), j2kenc_init(), jpeg_put_comments(), lag_decode_arith_plane(), lag_decode_frame(), lag_pred_line(), lavfi_read_header(), libopenjpeg_decode_frame(), libopenjpeg_encode_frame(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), load_input_picture(), main(), mimic_decode_frame(), mj2_create_image(), mm_decode_init(), mov_get_dv_codec_tag(), mov_get_rawvideo_codec_tag(), movie_query_formats(), mp_decode_init(), msrle_decode_init(), mss1_decode_init(), mss2_decode_frame(), mss2_decode_init(), mss3_decode_init(), mss4_decode_init(), msvideo1_decode_8bit(), msvideo1_decode_init(), mtv_read_header(), mvc_decode_init(), mxf_parse_structural_metadata(), new_video_stream(), open_video(), paf_vid_init(), pam_encode_frame(), parse_source_parameters(), parse_video_var(), pcx_decode_frame(), pcx_encode_frame(), png_enc_init(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), prores_encode_init(), ptx_decode_frame(), put_cod(), qtrle_decode_init(), qtrle_encode_frame(), qtrle_encode_init(), qtrle_encode_line(), raw_decode(), raw_encode(), raw_init_decoder(), raw_init_encoder(), rawvideo_read_header(), rawvideo_read_packet(), read_ffserver_streams(), read_header(), rl2_decode_init(), roq_decode_frame(), roq_decode_init(), rpza_decode_init(), rv10_decode_init(), sdl_write_header(), sdl_write_packet(), seqvideo_decode_init(), set_chroma_format(), sgirle_decode_init(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_init(), Stagefright_init(), sub2video_prepare(), sunrast_decode_frame(), sunrast_encode_init(), svq1_decode_init(), svq1_encode_frame(), svq3_decode_init(), targa_encode_frame(), tgq_decode_init(), tgv_decode_init(), tiff_unpack_strip(), tmv_decode_init(), tmv_read_header(), tqi_decode_init(), transcode_init(), truemotion1_decode_header(), tscc2_decode_init(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), uses_vdpau(), utvideo_decode_frame(), utvideo_decode_init(), utvideo_encode_frame(), utvideo_encode_init(), v308_decode_init(), v408_decode_init(), v410_decode_init(), v4l2_read_header(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vcr1_decode_init(), vcr2_init_sequence(), vdadec_decode(), vdadec_init(), vfw_read_header(), video_encode_example(), video_get_buffer(), vmdvideo_decode_init(), vp3_decode_init(), vp8_decode_init(), vpx_init(), vqa_decode_init(), write_header(), write_packet(), write_video_frame(), x11grab_read_header(), X264_frame(), X264_init(), xan_decode_init(), xbm_decode_frame(), xface_decode_init(), xiph_parse_fmtp_pair(), xvid_encode_frame(), xwd_decode_frame(), xwd_encode_frame(), y216_decode_init(), y41p_decode_init(), yop_decode_init(), yuv4_decode_init(), yuv4_read_header(), yuv4_read_packet(), zero12v_decode_init(), and zerocodec_decode_init().

int AVCodecContext::me_method

Motion estimation algorithm used for video coding.

1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex), 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]

• encoding: MUST be set by user.
• decoding: unused

Definition at line 1768 of file avcodec.h.

Referenced by add_codec(), config(), encode_blocks(), encode_frame(), encode_init(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), svq1_encode_plane(), X264_init(), XAVS_init(), and xvid_encode_init().

void(* AVCodecContext::draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)

If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band.

It improves cache usage. Not all codecs can do that. You must check the codec capabilities beforehand. When multithreading is used, it may be called from multiple threads at the same time; threads might draw different parts of the same AVFrame, or multiple AVFrames, and there is no guarantee that slices will be drawn in order. The function is also used by hardware acceleration APIs. It is called at least once during frame decoding to pass the data needed for hardware render. In that mode instead of pixel data, AVFrame points to a structure specific to the acceleration API. The application reads the structure and can change some fields to indicate progress or mark state.

• encoding: unused
• decoding: Set by user.

  Parameters

  height	the height of the slice
  y	the y position of the slice
  type	1->top field, 2->bottom field, 3->frame
  offset	offset into the AVFrame.data from which the slice should be read

Definition at line 1793 of file avcodec.h.

Referenced by draw_slice(), ff_draw_horiz_band(), ff_h264_draw_horiz_band(), ff_init_block_index(), MPV_decode_mb_internal(), update_context_from_user(), and vp3_draw_horiz_band().

enum AVPixelFormat(* AVCodecContext::get_format)(struct AVCodecContext *s, const enum AVPixelFormat *fmt)

callback to negotiate the pixelFormat

Parameters

fmt	is the list of formats which are supported by the codec, it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. The first is always the native one.

Returns

the chosen format

• encoding: unused
• decoding: Set by user, if not set the native format will be chosen.

Definition at line 1806 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), decode_init(), ff_h263_decode_init(), get_pixel_format(), mpeg_get_pixelformat(), vc1_decode_init(), and vdadec_init().

int AVCodecContext::max_b_frames

maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 relative to the input.

• encoding: Set by user.
• decoding: unused

Examples:

doc/examples/decoding_encoding.c, and doc/examples/muxing.c.

Definition at line 1814 of file avcodec.h.

Referenced by add_stream(), compute_pkt_fields2(), config(), decode_sequence_header_adv(), estimate_best_b_count(), ff_MPV_encode_init(), ff_vc1_decode_sequence_header(), ff_vc1_parse_frame_header(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), vaapi_vc1_start_frame(), vc1_decode_init(), video_encode_example(), wmv9_init(), X264_init(), XAVS_frame(), XAVS_init(), and xvid_encode_init().

float AVCodecContext::b_quant_factor

qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).

If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).

• encoding: Set by user.
• decoding: unused

Definition at line 1823 of file avcodec.h.

Referenced by add_codec(), ff_xvid_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), get_qscale(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::rc_strategy

obsolete FIXME remove

Definition at line 1826 of file avcodec.h.

Referenced by ff_rate_control_init(), ff_rate_control_uninit(), and ff_rate_estimate_qscale().

int AVCodecContext::b_frame_strategy

Definition at line 1829 of file avcodec.h.

Referenced by ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), select_input_picture(), X264_init(), and XAVS_init().

float AVCodecContext::b_quant_offset

qscale offset between IP and B-frames

• encoding: Set by user.
• decoding: unused

Definition at line 1852 of file avcodec.h.

Referenced by add_codec(), ff_xvid_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), get_qscale(), and xvid_encode_init().

int AVCodecContext::has_b_frames

Size of the frame reordering buffer in the decoder.

For MPEG-2 it is 1 IPB or 0 low delay IP.

• encoding: Set by libavcodec.
• decoding: Set by libavcodec.

Definition at line 1860 of file avcodec.h.

Referenced by avcodec_decode_video2(), compute_pkt_fields(), compute_pkt_fields2(), decode(), decode_postinit(), decode_stream_header(), dirac_combine_frame(), ff_h263_decode_frame(), ff_h264_decode_init(), ff_h264_execute_ref_pic_marking(), ff_mpeg4_decode_picture_header(), ff_MPV_encode_init(), ff_rv34_decode_init(), flush(), h264_parse(), h264_set_parameter_from_sps(), has_decode_delay_been_guessed(), libschroedinger_decode_frame(), libschroedinger_encode_init(), mov_build_index(), mpeg_decode_postinit(), mpegvideo_extract_headers(), mxf_get_mpeg2_codec_ul(), nut_read_header(), output_packet(), receive_frame(), rv10_decode_init(), show_stream(), svq3_decode_init(), transcode_init(), update_context_from_thread(), update_initial_durations(), update_initial_timestamps(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), write_streamheader(), X264_init(), XAVS_frame(), and XAVS_init().

int AVCodecContext::mpeg_quant

0-> h263 quant 1-> mpeg quant

• encoding: Set by user.
• decoding: unused

Definition at line 1867 of file avcodec.h.

Referenced by ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), and xvid_encode_init().

float AVCodecContext::i_quant_factor

qscale factor between P and I-frames If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).

If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).

• encoding: Set by user.
• decoding: unused

Definition at line 1876 of file avcodec.h.

Referenced by add_codec(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), get_qscale(), X264_init(), and XAVS_init().

float AVCodecContext::i_quant_offset

qscale offset between P and I-frames

• encoding: Set by user.
• decoding: unused

Definition at line 1883 of file avcodec.h.

Referenced by ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), and get_qscale().

float AVCodecContext::lumi_masking

luminance masking (0-> disabled)

• encoding: Set by user.
• decoding: unused

Definition at line 1890 of file avcodec.h.

Referenced by adaptive_quantization(), ff_MPV_encode_init(), parse_ffconfig(), and xvid_encode_init().

float AVCodecContext::temporal_cplx_masking

temporary complexity masking (0-> disabled)

• encoding: Set by user.
• decoding: unused

Definition at line 1897 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_MPV_encode_init().

float AVCodecContext::spatial_cplx_masking

spatial complexity masking (0-> disabled)

• encoding: Set by user.
• decoding: unused

Definition at line 1904 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_MPV_encode_init().

float AVCodecContext::p_masking

p block masking (0-> disabled)

• encoding: Set by user.
• decoding: unused

Definition at line 1911 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_MPV_encode_init().

float AVCodecContext::dark_masking

darkness masking (0-> disabled)

• encoding: Set by user.
• decoding: unused

Definition at line 1918 of file avcodec.h.

Referenced by adaptive_quantization(), ff_MPV_encode_init(), and parse_ffconfig().

int AVCodecContext::slice_count

slice count

• encoding: Set by libavcodec.
• decoding: Set by user (or 0).

Definition at line 1925 of file avcodec.h.

Referenced by ff_rv34_decode_frame(), get_slice_offset(), rv10_decode_frame(), and update_context_from_user().

int AVCodecContext::prediction_method

prediction method (needed for huffyuv)

• encoding: Set by user.
• decoding: unused

Definition at line 1931 of file avcodec.h.

Referenced by encode_init(), encode_picture_lossless(), encode_picture_ls(), ff_mjpeg_encode_picture_header(), png_enc_init(), and utvideo_encode_init().

int* AVCodecContext::slice_offset

slice offsets in the frame in bytes

• encoding: Set/allocated by libavcodec.
• decoding: Set/allocated by user (or NULL).

Definition at line 1941 of file avcodec.h.

Referenced by avcodec_copy_context(), frame_thread_free(), get_slice_offset(), and update_context_from_user().

AVRational AVCodecContext::sample_aspect_ratio

sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.

Numerator and denominator must be relatively prime and smaller than 256 for some video standards.

• encoding: Set by user.
• decoding: Set by libavcodec.

Examples:

doc/examples/filtering_video.c.

Definition at line 1950 of file avcodec.h.

Referenced by add_av_stream1(), av_guess_sample_aspect_ratio(), avcodec_decode_video2(), avcodec_get_context_defaults3(), avcodec_string(), configure_input_video_filter(), decode_frame(), decode_sequence_header_adv(), decode_slice_header(), decode_vol_header(), dump_stream_format(), dv_write_pack(), dvvideo_decode_frame(), encode_frame(), encode_init(), ff_h263_decode_picture_header(), ff_h263_encode_picture_header(), ff_init_buffer_info(), ff_intel_h263_decode_picture_header(), ff_MPV_encode_init(), ff_rv34_decode_frame(), gif_read_header1(), h264_slice_header_init(), has_codec_parameters(), init_filters(), init_muxer(), jpeg_put_comments(), lavfi_read_header(), mjpeg_decode_app(), mov_write_pasp_tag(), mov_write_tapt_tag(), mov_write_video_tag(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), mpeg_decode_postinit(), new_video_stream(), parse_source_parameters(), pcx_decode_frame(), pcx_encode_frame(), reap_filters(), receive_frame(), rv20_decode_picture_header(), transcode_init(), truemotion1_decode_header(), update_context_from_thread(), X264_frame(), X264_init(), XAVS_init(), and xvid_encode_frame().

int AVCodecContext::me_cmp

motion estimation comparison function

• encoding: Set by user.
• decoding: unused

Definition at line 1957 of file avcodec.h.

Referenced by config(), encode_init(), encode_q_branch(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), filter(), get_4block_rd(), get_block_rd(), hpel_motion_search(), qpel_motion_search(), X264_init(), and XAVS_init().

int AVCodecContext::me_sub_cmp

subpixel motion estimation comparison function

• encoding: Set by user.
• decoding: unused

Definition at line 1963 of file avcodec.h.

Referenced by config(), direct_search(), encode_init(), encode_q_branch(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), filter(), hpel_motion_search(), and qpel_motion_search().

int AVCodecContext::mb_cmp

macroblock comparison function (not supported yet)

• encoding: Set by user.
• decoding: unused

Definition at line 1969 of file avcodec.h.

Referenced by check_bidir_mv(), config(), direct_search(), encode_q_branch(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), h263_mv4_search(), interlaced_search(), and sse_mb().

int AVCodecContext::ildct_cmp

interlaced DCT comparison function

• encoding: Set by user.
• decoding: unused

Definition at line 1975 of file avcodec.h.

Referenced by encode_mb_internal(), ff_dvvideo_init(), and ff_MPV_encode_init().

int AVCodecContext::dia_size

ME diamond size & shape.

• encoding: Set by user.
• decoding: unused

Definition at line 1998 of file avcodec.h.

Referenced by config(), estimate_motion_thread(), ff_init_me(), iterative_me(), and svq1_encode_plane().

int AVCodecContext::last_predictor_count

amount of previous MV predictors (2a+1 x 2a+1 square)

• encoding: Set by user.
• decoding: unused

Definition at line 2005 of file avcodec.h.

Referenced by epzs_motion_search_internal().

int AVCodecContext::pre_me

prepass for motion estimation

• encoding: Set by user.
• decoding: unused

Definition at line 2012 of file avcodec.h.

Referenced by encode_picture().

int AVCodecContext::me_pre_cmp

motion estimation prepass comparison function

• encoding: Set by user.
• decoding: unused

Definition at line 2019 of file avcodec.h.

Referenced by ff_init_me(), and ff_pre_estimate_p_frame_motion().

int AVCodecContext::pre_dia_size

ME prepass diamond size & shape.

• encoding: Set by user.
• decoding: unused

Definition at line 2026 of file avcodec.h.

Referenced by ff_init_me(), and pre_estimate_motion_thread().

int AVCodecContext::me_subpel_quality

subpel ME quality

• encoding: Set by user.
• decoding: unused

Definition at line 2033 of file avcodec.h.

Referenced by ffm2_read_header(), ffm_read_header(), ffm_write_header(), qpel_motion_search(), X264_init(), and XAVS_init().

int AVCodecContext::dtg_active_format

DTG active format information (additional aspect ratio information only used in DVB MPEG-2 transport streams) 0 if not set.

• encoding: unused
• decoding: Set by decoder.

Definition at line 2043 of file avcodec.h.

Referenced by decode_user_data_itu_t_t35(), mpeg_decode_user_data(), and update_context_from_thread().

int AVCodecContext::me_range

maximum motion estimation search range in subpel units If 0 then no limit.

• encoding: Set by user.
• decoding: unused

Definition at line 2059 of file avcodec.h.

Referenced by encode_init(), ff_fix_long_mvs(), ff_fix_long_p_mvs(), ff_get_best_fcode(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_limits(), mpeg1_encode_sequence_header(), X264_init(), and XAVS_init().

int AVCodecContext::intra_quant_bias

intra quantizer bias

• encoding: Set by user.
• decoding: unused

Definition at line 2066 of file avcodec.h.

Referenced by dnxhd_encode_init(), and ff_MPV_encode_init().

int AVCodecContext::inter_quant_bias

inter quantizer bias

• encoding: Set by user.
• decoding: unused

Definition at line 2074 of file avcodec.h.

Referenced by ff_MPV_encode_init().

int AVCodecContext::slice_flags

slice flags

• encoding: unused
• decoding: Set by user.

Definition at line 2091 of file avcodec.h.

Referenced by ff_draw_horiz_band(), ff_h264_draw_horiz_band(), mpeg_field_start(), and update_context_from_user().

int AVCodecContext::xvmc_acceleration

XVideo Motion Acceleration.

• encoding: forbidden
• decoding: set by decoder

Definition at line 2101 of file avcodec.h.

Referenced by dsputil_init_sse(), ff_er_frame_end(), ff_MPV_frame_end(), ff_MPV_frame_start(), ff_xvmc_decode_mb(), is_intra_more_likely(), mpeg_decode_mb(), mpeg_decode_slice(), mpeg_field_start(), mpeg_get_pixelformat(), MPV_decode_mb_internal(), and slice_end().

int AVCodecContext::mb_decision

macroblock decision mode

• encoding: Set by user.
• decoding: unused

Examples:

doc/examples/muxing.c.

Definition at line 2108 of file avcodec.h.

Referenced by add_stream(), avcodec_string(), clip_coeffs(), dnxhd_calc_bits_thread(), dnxhd_encode_picture(), dnxhd_init_rc(), encode_mb_hq(), encode_thread(), estimate_best_b_count(), ff_estimate_b_frame_motion(), ff_estimate_p_frame_motion(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), MPV_decode_mb_internal(), parse_ffconfig(), and xvid_encode_init().

uint16_t* AVCodecContext::intra_matrix

custom intra quantization matrix

• encoding: Set by user, can be NULL.
• decoding: Set by libavcodec.

Definition at line 2118 of file avcodec.h.

Referenced by avcodec_copy_context(), ff_MPV_encode_init(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), new_video_stream(), and xvid_encode_init().

uint16_t* AVCodecContext::inter_matrix

custom inter quantization matrix

• encoding: Set by user, can be NULL.
• decoding: Set by libavcodec.

Definition at line 2125 of file avcodec.h.

Referenced by avcodec_copy_context(), ff_MPV_encode_init(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), new_video_stream(), and xvid_encode_init().

int AVCodecContext::scenechange_threshold

scene change detection threshold 0 is default, larger means fewer detected scene changes.

• encoding: Set by user.
• decoding: unused

Definition at line 2133 of file avcodec.h.

Referenced by encode_frame(), encode_picture(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), X264_init(), and XAVS_init().

int AVCodecContext::noise_reduction

noise reduction strength

• encoding: Set by user.
• decoding: unused

Definition at line 2140 of file avcodec.h.

Referenced by ff_MPV_common_init(), ff_MPV_frame_start(), init_duplicate_context(), merge_context_after_encode(), update_noise_reduction(), vpx_init(), X264_init(), and XAVS_init().

int AVCodecContext::me_threshold

Motion estimation threshold below which no motion estimation is performed, but instead the user specified motion vectors are used.

• encoding: Set by user.
• decoding: unused

Definition at line 2163 of file avcodec.h.

Referenced by copy_picture_attributes(), do_video_out(), encode_picture(), ff_estimate_b_frame_motion(), ff_estimate_p_frame_motion(), ff_MPV_encode_init(), and transcode_init().

int AVCodecContext::mb_threshold

Macroblock threshold below which the user specified macroblock types will be used.

• encoding: Set by user.
• decoding: unused

Definition at line 2170 of file avcodec.h.

Referenced by ff_estimate_b_frame_motion(), ff_estimate_p_frame_motion(), ff_MPV_encode_init(), and vpx_init().

int AVCodecContext::intra_dc_precision

precision of the intra DC coefficient - 8

• encoding: Set by user.
• decoding: unused

Definition at line 2177 of file avcodec.h.

Referenced by ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), and new_video_stream().

int AVCodecContext::skip_top

Number of macroblock rows at the top which are skipped.

• encoding: unused
• decoding: Set by user.

Definition at line 2184 of file avcodec.h.

Referenced by ff_er_add_slice(), and ff_er_frame_end().

int AVCodecContext::skip_bottom

Number of macroblock rows at the bottom which are skipped.

• encoding: unused
• decoding: Set by user.

Definition at line 2191 of file avcodec.h.

Referenced by decode_chunks(), and ff_er_frame_end().

float AVCodecContext::border_masking

Border processing masking, raises the quantizer for mbs on the borders of the picture.

• encoding: Set by user.
• decoding: unused

Definition at line 2199 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_MPV_encode_init().

int AVCodecContext::mb_lmin

minimum MB lagrange multipler

• encoding: Set by user.
• decoding: unused

Definition at line 2206 of file avcodec.h.

Referenced by adaptive_quantization().

int AVCodecContext::mb_lmax

maximum MB lagrange multipler

• encoding: Set by user.
• decoding: unused

Definition at line 2213 of file avcodec.h.

Referenced by adaptive_quantization().

int AVCodecContext::me_penalty_compensation

• encoding: Set by user.
• decoding: unused

Definition at line 2220 of file avcodec.h.

Referenced by encode_picture().

int AVCodecContext::bidir_refine

• encoding: Set by user.
• decoding: unused

Definition at line 2227 of file avcodec.h.

Referenced by bidir_refine().

int AVCodecContext::brd_scale

• encoding: Set by user.
• decoding: unused

Definition at line 2234 of file avcodec.h.

Referenced by estimate_best_b_count().

int AVCodecContext::keyint_min

minimum GOP size

• encoding: Set by user.
• decoding: unused

Definition at line 2241 of file avcodec.h.

Referenced by encode_frame(), encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), flashsv2_encode_frame(), vpx_init(), X264_init(), and XAVS_init().

int AVCodecContext::refs

number of reference frames

• encoding: Set by user.
• decoding: Set by lavc.

Definition at line 2248 of file avcodec.h.

Referenced by config(), decode_slice_header(), encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), X264_init(), and XAVS_init().

int AVCodecContext::chromaoffset

chroma qp offset from luma

• encoding: Set by user.
• decoding: unused

Definition at line 2255 of file avcodec.h.

Referenced by X264_init(), and XAVS_init().

int AVCodecContext::scenechange_factor

Multiplied by qscale for each frame and added to scene_change_score.

• encoding: Set by user.
• decoding: unused

Definition at line 2262 of file avcodec.h.

int AVCodecContext::mv0_threshold

Note: Value depends upon the compare function used for fullpel ME.

• encoding: Set by user.
• decoding: unused

Definition at line 2270 of file avcodec.h.

Referenced by epzs_motion_search_internal().

int AVCodecContext::b_sensitivity

Adjust sensitivity of b_frame_strategy 1.

• encoding: Set by user.
• decoding: unused

Definition at line 2277 of file avcodec.h.

Referenced by select_input_picture().

enum AVColorPrimaries AVCodecContext::color_primaries

Chromaticity coordinates of the source primaries.

• encoding: Set by user
• decoding: Set by libavcodec

Definition at line 2284 of file avcodec.h.

Referenced by decode_frame_header(), decode_sequence_header_adv(), decode_slice_header(), encode_frame(), encode_init(), libschroedinger_encode_init(), mpeg_decode_sequence_display_extension(), parse_source_parameters(), and update_context_from_thread().

enum AVColorTransferCharacteristic AVCodecContext::color_trc

Color Transfer Characteristic.

• encoding: Set by user
• decoding: Set by libavcodec

Definition at line 2291 of file avcodec.h.

Referenced by decode_frame_header(), decode_sequence_header_adv(), decode_slice_header(), encode_frame(), libschroedinger_encode_init(), mpeg_decode_sequence_display_extension(), parse_source_parameters(), and update_context_from_thread().

enum AVColorSpace AVCodecContext::colorspace

YUV colorspace type.

• encoding: Set by user
• decoding: Set by libavcodec

Definition at line 2298 of file avcodec.h.

Referenced by decode_frame_header(), decode_sequence_header_adv(), decode_slice_header(), encode_frame(), get_pixel_format(), libschroedinger_encode_init(), mpeg_decode_sequence_display_extension(), parse_source_parameters(), and update_context_from_thread().

enum AVColorRange AVCodecContext::color_range

MPEG vs JPEG YUV range.

• encoding: Set by user
• decoding: Set by libavcodec

Definition at line 2305 of file avcodec.h.

Referenced by decode_sequence_header_adv(), decode_slice_header(), dshow_add_device(), ff_mjpeg_decode_sof(), get_pixel_format(), mpeg_decode_init(), parse_source_parameters(), and update_context_from_thread().

enum AVChromaLocation AVCodecContext::chroma_sample_location

This defines the location of chroma samples.

• encoding: Set by user
• decoding: Set by libavcodec

Definition at line 2312 of file avcodec.h.

Referenced by decode_init(), decode_vui_parameters(), encode_frame(), ff_dvvideo_init(), ff_h263_decode_init(), ff_h264_decode_init(), ff_mjpeg_decode_init(), mpeg_decode_init(), transcode_init(), update_context_from_thread(), vp3_decode_init(), and yuv4_read_header().

int AVCodecContext::slices

Number of slices.

Indicates number of picture subdivisions. Used for parallelized decoding.

• encoding: Set by user
• decoding: unused

Definition at line 2321 of file avcodec.h.

Referenced by encode_init(), ff_MPV_common_init(), ff_MPV_encode_init(), vpx_init(), and X264_init().

enum AVFieldOrder AVCodecContext::field_order

Field order.

• encoding: set by libavcodec
• decoding: Set by user.

Definition at line 2327 of file avcodec.h.

Referenced by avui_encode_frame(), avui_encode_init(), do_video_out(), ff_generate_avci_extradata(), ff_mjpeg_decode_init(), mov_read_fiel(), mov_write_fiel_tag(), mov_write_video_tag(), mxf_parse_structural_metadata(), raw_init_decoder(), transcode_init(), and yuv4_read_header().

int AVCodecContext::sample_rate

samples per second

Examples:

doc/examples/decoding_encoding.c, doc/examples/demuxing.c, doc/examples/filtering_audio.c, and doc/examples/muxing.c.

Definition at line 2330 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_decode_init(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), ac3_decode_frame(), add_av_stream(), add_codec(), add_input_streams(), add_stream(), adpcm_encode_init(), adx_encode_header(), adx_encode_init(), adx_read_header(), aea_read_header(), afc_read_header(), aiff_read_header(), aiff_write_header(), alac_encode_init(), amf_parse_object(), amr_decode_fix_avctx(), amr_read_header(), amr_wb_encode_init(), amrnb_decode_init(), amrwb_decode_init(), apc_read_header(), ape_read_header(), apply_param_change(), ast_read_header(), ast_write_header(), audio_encode_example(), audio_read_header(), audio_write_header(), av_get_audio_frame_duration(), avcodec_decode_audio4(), avcodec_open2(), avcodec_string(), avisynth_read_header(), avpriv_adx_decode_header(), avpriv_flac_parse_streaminfo(), avr_read_header(), bfi_read_header(), bmv_read_header(), caf_write_header(), cdata_read_header(), cdxl_read_packet(), celt_header(), cin_read_header(), cng_decode_init(), compute_status(), configure_input_audio_filter(), create_audio_stream(), create_new_audio_stream(), create_vorbis_context(), daud_header(), daud_write_header(), dca_decode_frame(), dca_parse(), decode_audio(), decode_frame(), decode_init(), decode_ppc(), decode_stream_header(), decode_tag(), decode_wave_header(), do_streamcopy(), dshow_add_device(), dv_extract_audio_info(), dv_init_mux(), dxa_read_header(), ea_read_header(), encode_init(), epaf_read_header(), Faac_encode_init(), ff_aac_ac3_parse(), ff_af_queue_add(), ff_choose_timebase(), ff_compute_frame_duration(), ff_get_audio_frame_size(), ff_init_buffer_info(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_pcm_read_seek(), ff_psy_preprocess_init(), ff_rtp_get_codec_info(), ff_rtp_get_payload_type(), ff_rtp_parse_open(), ff_samples_to_time_base(), ff_spdif_read_packet(), ff_voc_get_packet(), ff_wma_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), find_expected_header(), find_stream_in_feed(), flac_encode_init(), flac_header(), flv_read_packet(), flv_same_audio_codec(), flv_set_audio_codec(), flv_write_header(), fourxm_read_header(), g722_read_header(), g723_1_init(), g729_read_header(), get_aiff_header(), get_audio_flags(), get_best_header(), get_bit_rate(), get_codec_data(), get_sindex(), gsm_init(), gsm_read_header(), gxf_write_header(), handle_file(), has_codec_parameters(), idcin_read_header(), iff_read_header(), ilbc_decode_init(), ilbc_encode_init(), ilbc_read_header(), imc_decode_init(), init_bitstream_params(), init_filters(), init_muxer(), init_pts(), ipmovie_read_header(), ircam_read_header(), ircam_write_header(), iss_read_header(), lavfi_read_header(), libcelt_dec_init(), libgsm_decode_init(), libgsm_encode_init(), libopus_decode_init(), libopus_encode_init(), libopus_write_header(), libspeex_decode_init(), lvf_read_header(), lxf_read_header(), main(), matroska_read_header(), mkv_write_tracks(), mlp_parse(), mmf_read_header(), modplug_read_header(), mov_write_audio_tag(), mov_write_esds_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_uuidprof_tag(), movie_query_formats(), mp3_header_decompress(), mp3_write_xing(), mp3lame_encode_init(), MPA_encode_init(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mpegts_write_header(), mtv_read_header(), mv_read_header(), mxf_parse_structural_metadata(), mxf_write_generic_sound_common(), mxf_write_header(), mxf_write_wav_common(), mxg_read_header(), new_audio_stream(), nist_read_header(), nsv_read_chunk(), nut_read_header(), nut_write_header(), ogg_write_header(), ogg_write_packet(), oggvorbis_decode_init(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), oma_read_header(), oma_write_header(), open_audio(), opus_header(), output_packet(), parse_audio_var(), parse_ffconfig(), parse_packet(), pcm_bluray_parse_header(), pcm_encode_init(), pcm_read_header(), pmp_header(), psy_3gpp_init(), pulse_read_header(), pvf_read_header(), qcp_read_header(), qdm2_decode_init(), r3d_read_reda(), read_desc_chunk(), read_header(), read_major_sync(), read_packet(), read_specific_config(), rl2_read_header(), rm_read_audio_stream_info(), rm_write_header(), roq_dpcm_encode_init(), roq_read_packet(), rso_read_header(), rso_write_header(), rtp_write_header(), rv10_write_header(), s302m_parse_frame_header(), sbg_read_header(), search_for_quantizers_twoloop(), seq_read_header(), set_sample_rate_params(), show_stream(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smush_read_header(), sol_read_header(), sox_read_header(), sox_write_header(), speex_header(), str_read_packet(), stream_component_open(), stream_cycle_channel(), swf_write_header(), tak_decode_frame(), tak_read_header(), thp_read_header(), tmv_read_header(), transcode_init(), tta_decode_init(), tta_read_header(), twin_decode_frame(), twin_decode_init(), twolame_encode_init(), validate_options(), vid_read_packet(), vivo_read_header(), vmd_read_header(), vmdaudio_decode_init(), voc_write_packet(), vorbis_decode_frame(), vorbis_decode_init(), vorbis_header(), vqf_read_header(), wavesynth_parse_extradata(), wc3_read_header(), wmavoice_decode_init(), write_header(), write_manifest(), write_streamheader(), wsaud_read_header(), wsvqa_read_packet(), wv_read_header(), xa_read_header(), xmv_read_header(), xwma_read_header(), and yop_read_header().

int AVCodecContext::channels

number of audio channels

Examples:

doc/examples/decoding_encoding.c, doc/examples/demuxing.c, doc/examples/filtering_audio.c, and doc/examples/muxing.c.

Definition at line 2331 of file avcodec.h.

Referenced by aac_decode_init(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), ac3_decode_frame(), ac3_decode_init(), add_av_stream(), add_codec(), add_input_streams(), add_stream(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), adpcm_swf_decode(), adx_decode_frame(), adx_decode_init(), adx_encode_frame(), adx_encode_header(), adx_encode_init(), adx_read_packet(), aea_read_header(), afc_read_header(), aiff_write_header(), alac_decode_init(), alac_encode_frame(), alac_encode_init(), amr_decode_fix_avctx(), amr_handle_packet(), amr_read_header(), amr_wb_encode_init(), amrnb_decode_init(), amrwb_decode_init(), apc_read_header(), ape_decode_init(), ape_read_header(), apply_param_change(), apply_window_and_mdct(), ast_read_header(), ast_read_packet(), ast_write_header(), ast_write_packet(), atrac1_decode_frame(), atrac1_decode_init(), atrac3_decode_init(), audio_decode_example(), audio_encode_example(), audio_get_buffer(), audio_read_header(), audio_write_header(), av_get_audio_frame_duration(), avcodec_decode_audio4(), avcodec_encode_audio2(), avcodec_open2(), avcodec_string(), avisynth_read_header(), avpriv_adx_decode_header(), avpriv_flac_parse_streaminfo(), avr_read_header(), bfi_read_header(), bmv_aud_decode_init(), bmv_read_header(), caf_write_header(), caf_write_trailer(), cdata_read_header(), cdxl_read_packet(), celt_header(), cin_read_header(), cinaudio_decode_init(), cng_decode_init(), cng_encode_init(), compute_status(), configure_input_audio_filter(), configure_output_audio_filter(), construct_perm_table(), cook_decode_init(), cook_parse(), create_audio_stream(), create_new_audio_stream(), create_vorbis_context(), daud_header(), daud_write_header(), dca_decode_frame(), dca_decode_init(), dec_gain(), decode_audio(), decode_block(), decode_channel_transform(), decode_decorrelation_matrix(), decode_extension_payload(), decode_frame(), decode_init(), decode_ppc(), decode_stream_header(), decode_subframe(), decode_tilehdr(), decoder_init(), dpcm_decode_frame(), dpcm_decode_init(), dshow_add_device(), dump_context(), dv_extract_audio_info(), dv_init_mux(), ea_read_header(), eightsvx_decode_frame(), eightsvx_decode_init(), encode_block(), encode_frame(), encode_init(), epaf_read_header(), evrc_decode_init(), Faac_encode_frame(), Faac_encode_init(), ff_aac_ac3_parse(), ff_ac3_validate_metadata(), ff_audio_interleave_init(), ff_flac_set_channel_layout(), ff_init_buffer_info(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_pcm_read_seek(), ff_psy_init(), ff_psy_preprocess_end(), ff_psy_preprocess_init(), ff_rtp_get_codec_info(), ff_rtp_get_payload_type(), ff_voc_get_packet(), ff_wma_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), flac_encode_init(), flush(), flv_read_packet(), flv_write_header(), fourxm_read_header(), frame_configure_elements(), g722_decode_init(), g722_encode_init(), g722_read_header(), g723_1_decode_init(), g723_1_init(), g729_read_header(), get_aiff_header(), get_audio_flags(), get_best_header(), get_bit_rate(), get_codec_data(), get_nb_samples(), get_sindex(), gsm_init(), gsm_read_header(), guess_channel_layout(), guess_input_channel_layout(), gxf_write_header(), handle_file(), has_codec_parameters(), idcin_read_header(), iff_read_header(), ilbc_decode_init(), ilbc_encode_init(), ilbc_read_header(), imc_decode_block(), imc_decode_frame(), imc_decode_init(), imdct_output(), init_bitstream_params(), init_filters(), init_mdct_win(), init_muxer(), inverse_channel_transform(), ipmovie_read_header(), ircam_read_header(), ircam_write_header(), iss_read_header(), iss_read_packet(), lame_window_init(), lavfi_read_header(), libcelt_dec_decode(), libcelt_dec_init(), libgsm_decode_init(), libgsm_encode_init(), libopus_decode(), libopus_decode_init(), libopus_encode(), libopus_encode_init(), libopus_write_header(), libspeex_decode_frame(), libspeex_decode_init(), lvf_read_header(), lxf_read_header(), mace_decode_frame(), mace_decode_init(), main(), matroska_read_header(), mkv_write_tracks(), mlp_parse(), mmf_read_header(), modplug_read_header(), mov_read_dac3(), mov_read_dec3(), mov_write_audio_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_uuidprof_tag(), mp3_header_compress(), mp3_header_decompress(), mp3_write_xing(), mp3lame_encode_frame(), mp3lame_encode_init(), MPA_encode_init(), mpc7_decode_init(), mpc8_decode_frame(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mv_read_header(), mxf_get_d10_aes3_packet(), mxf_parse_structural_metadata(), mxf_set_audio_pts(), mxf_write_d10_audio_packet(), mxf_write_generic_sound_common(), mxg_read_header(), new_audio_stream(), nist_read_header(), nsv_read_chunk(), nut_read_header(), oggvorbis_decode_init(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), oma_read_header(), oma_write_header(), open_audio(), open_output_file(), opt_map_channel(), opus_header(), output_configure(), output_data(), pad_last_frame(), paf_aud_init(), parse_ffconfig(), parse_mpeg1waveformatex(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_frame(), pcm_decode_init(), pcm_encode_frame(), pcm_encode_init(), pcm_read_header(), pmp_header(), pop_output_configuration(), print_enc_params(), psy_3gpp_init(), psy_3gpp_window(), pulse_read_header(), pvf_read_header(), qcelp_decode_init(), qcp_read_header(), qdm2_decode_init(), r3d_read_red1(), ra144_decode_init(), ra144_encode_init(), ra288_decode_init(), read_and_decode_spectrum(), read_channel_data(), read_desc_chunk(), read_frame_data(), read_header(), read_index(), read_major_sync(), read_packet(), read_restart_header(), read_specific_config(), reap_filters(), revert_channel_correlation(), rl2_read_header(), rm_read_audio_stream_info(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), roq_read_packet(), rso_read_header(), rso_write_header(), rtp_write_packet(), rv10_write_header(), s302m_decode_frame(), s302m_parse_frame_header(), sbg_read_header(), search_for_quantizers_twoloop(), seq_read_header(), set_channels(), show_stream(), sipr_decoder_init(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smka_decode_frame(), smka_decode_init(), smush_read_header(), sol_read_header(), sox_read_header(), sox_write_header(), speex_header(), str_read_packet(), stream_component_open(), stream_cycle_channel(), swf_write_header(), tak_decode_frame(), tak_read_header(), thp_read_header(), tmv_read_header(), transcode_init(), truespeech_decode_init(), tta_decode_init(), tta_read_header(), twin_decode_init(), twolame_encode_init(), validate_options(), vid_read_packet(), vivo_read_header(), vmd_read_header(), vmdaudio_decode_frame(), vmdaudio_decode_init(), voc_write_packet(), vorbis_decode_frame(), vorbis_decode_init(), vorbis_encode_init(), vorbis_header(), vqf_read_header(), wavesynth_decode(), wavesynth_init(), wavpack_decode_block(), wavpack_decode_init(), wc3_read_header(), wma_decode_block(), wma_decode_frame(), wmavoice_decode_init(), write_audio_frame(), write_frame(), write_manifest(), write_packet(), write_streamheader(), ws_snd_decode_init(), wsaud_read_header(), wsaud_read_packet(), wsvqa_read_packet(), wv_read_header(), wv_unpack_mono(), wv_unpack_stereo(), xa_read_header(), xa_read_packet(), xmv_read_header(), xwma_read_header(), and yop_read_header().

enum AVSampleFormat AVCodecContext::sample_fmt

audio sample format

• encoding: Set by user.
• decoding: Set by libavcodec.sample format

Examples:

doc/examples/decoding_encoding.c, doc/examples/demuxing.c, doc/examples/filtering_audio.c, and doc/examples/muxing.c.

Definition at line 2338 of file avcodec.h.

Referenced by aac_decode_init(), ac3_decode_init(), add_input_streams(), add_stream(), adpcm_decode_init(), adx_decode_init(), alac_decode_init(), alac_encode_init(), allocate_buffers(), amr_decode_fix_avctx(), amrnb_decode_init(), amrwb_decode_init(), ape_decode_init(), atrac1_decode_init(), atrac3_decode_init(), audio_decode_example(), audio_encode_example(), audio_get_buffer(), avcodec_decode_audio4(), avcodec_encode_audio2(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), bmv_aud_decode_init(), choose_sample_fmt(), cinaudio_decode_init(), cng_decode_init(), configure_input_audio_filter(), cook_decode_init(), copy_samples(), dca_decode_frame(), dca_decode_init(), decode_element(), decode_frame(), decode_init(), decoder_init(), dpcm_decode_init(), dprint_options(), dshow_add_device(), eightsvx_decode_init(), evrc_decode_init(), ff_init_buffer_info(), flac_decode_init(), flac_encode_init(), flac_set_bps(), g722_decode_init(), g723_1_decode_init(), gsm_init(), has_codec_parameters(), ilbc_decode_init(), imc_decode_init(), init_filters(), init_offset(), init_sample_buffers(), lavfi_read_header(), libcelt_dec_init(), libgsm_decode_init(), libopus_decode(), libopus_decode_init(), libopus_encode(), libopus_encode_init(), libspeex_decode_init(), mace_decode_init(), main(), mkv_write_tracks(), mlp_parse(), movie_query_formats(), mp3lame_encode_frame(), mp3lame_encode_init(), mp_decode_frame(), mpc7_decode_init(), mpc8_decode_init(), new_audio_stream(), oggvorbis_decode_init(), open_audio(), output_data(), pad_last_frame(), paf_aud_init(), parse_streaminfo(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_init(), qcelp_decode_init(), qdm2_decode_init(), ra144_decode_init(), ra288_decode_init(), read_major_sync(), s302m_parse_frame_header(), set_bps_params(), show_stream(), sipr_decoder_init(), smka_decode_frame(), smka_decode_init(), tak_decode_frame(), transcode_init(), truespeech_decode_init(), tta_decode_init(), twin_decode_init(), twolame_encode_frame(), vmdaudio_decode_init(), vorbis_decode_init(), wavesynth_init(), wavpack_decode_block(), wavpack_decode_frame(), wavpack_decode_init(), wma_decode_init(), wmavoice_decode_init(), write_audio_frame(), write_element(), and ws_snd_decode_init().

int AVCodecContext::frame_size

Number of samples per channel in an audio frame.

• encoding: set by libavcodec in avcodec_open2(). Each submitted frame except the last must contain exactly frame_size samples per channel. May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, then the frame size is not restricted.
• decoding: may be set by some decoders to indicate constant frame size

Examples:

doc/examples/decoding_encoding.c, and doc/examples/muxing.c.

Definition at line 2350 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), adpcm_encode_init(), adx_encode_init(), alac_encode_init(), amr_wb_encode_init(), audio_encode_example(), avcodec_encode_audio2(), celt_header(), cng_decode_frame(), cng_decode_init(), cng_encode_init(), decode_audio(), decode_frame(), decoder_init(), do_streamcopy(), dprint_compression_options(), encode_frame(), encode_init(), Faac_encode_frame(), Faac_encode_init(), ff_ac3_encode_init(), ff_get_audio_frame_size(), ff_mov_write_packet(), ff_psy_preprocess(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), flac_encode_init(), flush_encoders(), g722_encode_init(), gsm_decode_frame(), gsm_init(), has_codec_parameters(), ilbc_encode_init(), libcelt_dec_decode(), libcelt_dec_init(), libgsm_decode_frame(), libgsm_decode_init(), libgsm_encode_init(), libopus_encode_init(), mov_write_audio_tag(), mov_write_header(), mp3lame_encode_frame(), mp3lame_encode_init(), mp_decode_frame(), MPA_encode_init(), mpegts_write_header(), oggvorbis_encode_init(), open_audio(), output_packet(), pad_last_frame(), pcm_encode_init(), print_enc_params(), ra144_encode_frame(), ra144_encode_init(), read_header(), read_major_sync(), rm_write_header(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), rtp_write_header(), rv10_write_header(), sbg_read_header(), sbg_read_packet(), swf_write_audio(), swf_write_header(), transcode_init(), twolame_encode_frame(), twolame_encode_init(), vorbis_encode_frame(), and vorbis_encode_init().

int AVCodecContext::frame_number

Frame counter, set by libavcodec.

• decoding: total number of frames returned from the decoder so far.

• encoding: total number of frames passed to the encoder so far.

  Note

  the counter is not incremented if encoding/decoding resulted in an error.

Definition at line 2361 of file avcodec.h.

Referenced by aac_encode_frame(), ast_write_packet(), ast_write_trailer(), avcodec_decode_audio4(), avcodec_decode_subtitle2(), avcodec_decode_video2(), avcodec_encode_audio2(), avcodec_encode_subtitle(), avcodec_encode_video2(), avcodec_open2(), bfi_decode_frame(), cdg_decode_frame(), decode_frame(), decode_packet(), eightsvx_decode_frame(), encode_frame(), ff_eac3_output_frame_header(), flashsv2_encode_frame(), flashsv_encode_frame(), h261_decode_frame(), http_prepare_data(), ipvideo_decode_opcodes(), optimum_use15_7(), qtrle_encode_frame(), rv10_decode_frame(), svq1_encode_end(), svq1_encode_frame(), svq3_decode_frame(), update_context_from_user(), warn_insufficient_frame_quality(), XAVS_frame(), and yop_decode_frame().

int AVCodecContext::block_align

number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.

Definition at line 2367 of file avcodec.h.

Referenced by adpcm_encode_init(), aea_read_header(), aea_read_packet(), aiff_read_header(), aiff_read_packet(), aiff_write_header(), aiff_write_trailer(), apc_read_header(), asf_write_header1(), ast_write_trailer(), atrac1_decode_frame(), atrac1_decode_init(), atrac3_decode_frame(), atrac3_decode_init(), av_get_audio_frame_duration(), avi_read_header(), avi_write_packet(), avisynth_read_header(), avr_read_header(), caf_write_header(), caf_write_packet(), caf_write_trailer(), cook_decode_frame(), cook_decode_init(), daud_header(), decode_frame(), decode_init(), decode_packet(), dxa_read_header(), ea_read_header(), encode_frame(), encode_init(), encode_superframe(), epaf_read_header(), ff_get_audio_frame_size(), ff_mov_read_stsd_entries(), ff_pcm_read_packet(), ff_pcm_read_seek(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_wma_init(), film_read_header(), fourxm_read_header(), g729_read_header(), g729_read_packet(), get_aiff_header(), get_mode(), get_nb_samples(), get_sindex(), gsm_decode_frame(), gsm_init(), handle_file(), idcin_read_header(), iff_read_header(), iff_read_packet(), ilbc_encode_init(), ilbc_parse_fmtp(), ilbc_parse_sdp_line(), ilbc_read_header(), ilbc_read_packet(), ilbc_write_header(), init_muxer(), ipmovie_read_header(), ircam_read_header(), ism_write_header(), iss_read_header(), libgsm_decode_frame(), libgsm_decode_init(), libgsm_encode_frame(), libgsm_encode_init(), matroska_parse_block(), matroska_parse_rm_audio(), matroska_read_header(), mov_write_header(), mov_write_isml_manifest(), mxf_write_d10_audio_packet(), mxf_write_wav_common(), mxg_read_header(), nist_read_header(), oma_read_header(), oma_read_packet(), oma_write_header(), pcm_encode_init(), pcm_read_header(), pvf_read_header(), ra288_decode_frame(), ra288_decode_init(), read_desc_chunk(), read_header(), rl2_read_header(), rm_read_audio_stream_info(), roq_read_packet(), rso_read_header(), rtp_send_ilbc(), seq_read_header(), sipr_decoder_init(), sox_read_header(), str_read_packet(), transcode_init(), tta_decode_init(), vivo_read_header(), vmd_read_header(), vmdaudio_decode_frame(), vmdaudio_decode_init(), wc3_read_header(), wma_decode_superframe(), wmavoice_decode_init(), wmavoice_decode_packet(), xmv_read_header(), xwma_read_header(), and xwma_read_packet().

int AVCodecContext::cutoff

Audio cutoff bandwidth (0 means "automatic")

• encoding: Set by user.
• decoding: unused

Definition at line 2374 of file avcodec.h.

Referenced by aac_encode_init(), aacPlus_encode_init(), Faac_encode_init(), ff_psy_preprocess_init(), libopus_configure_encoder(), libopus_encode_init(), oggvorbis_init_encoder(), psy_3gpp_init(), and validate_options().

uint64_t AVCodecContext::channel_layout

Audio channel layout.

• encoding: set by user.
• decoding: set by user, may be overwritten by libavcodec.

Examples:

doc/examples/decoding_encoding.c, and doc/examples/filtering_audio.c.

Definition at line 2391 of file avcodec.h.

Referenced by ac3_decode_frame(), add_input_streams(), aea_read_header(), afc_read_header(), aiff_write_header(), alac_decode_init(), amr_decode_fix_avctx(), amr_handle_packet(), amr_read_header(), amrnb_decode_init(), amrwb_decode_init(), apc_read_header(), ape_decode_init(), apply_param_change(), ast_read_header(), audio_encode_example(), avcodec_decode_audio4(), avcodec_open2(), avcodec_string(), bfi_read_header(), bmv_aud_decode_init(), bmv_read_header(), caf_write_header(), cdata_read_header(), cdxl_read_packet(), cin_read_header(), cinaudio_decode_init(), configure_input_audio_filter(), configure_output_audio_filter(), cook_decode_init(), create_audio_stream(), create_new_audio_stream(), daud_header(), dca_decode_frame(), decode_audio(), decode_frame(), decode_init(), dprint_options(), dv_extract_audio_info(), encode_init(), evrc_decode_init(), ff_aac_ac3_parse(), ff_alsa_open(), ff_flac_set_channel_layout(), ff_init_buffer_info(), ff_mov_read_chan(), flac_encode_init(), flv_read_packet(), g722_decode_init(), g723_1_decode_init(), g723_1_init(), get_best_header(), get_codec_data(), get_sindex(), gsm_init(), gsm_read_header(), guess_channel_layout(), guess_input_channel_layout(), idcin_read_header(), iff_read_header(), ilbc_decode_init(), imc_decode_init(), init_filters(), ipmovie_read_header(), iss_read_header(), lavfi_read_header(), libgsm_decode_init(), libopus_decode_init(), libspeex_decode_init(), mlp_parse(), mmf_read_header(), mov_read_dac3(), mov_read_dec3(), mov_write_chan_tag(), movie_common_init(), movie_query_formats(), mpc7_decode_init(), mpc8_decode_init(), mpc_read_header(), mxg_read_header(), oggvorbis_init_encoder(), oma_read_header(), output_configure(), paf_aud_init(), parse_mpeg1waveformatex(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pop_output_configuration(), qcelp_decode_init(), qcp_read_header(), qdm2_decode_init(), ra144_decode_init(), ra288_decode_init(), read_header(), read_major_sync(), read_restart_header(), rm_read_audio_stream_info(), roq_read_packet(), rso_read_header(), s302m_parse_frame_header(), sbg_read_header(), seq_read_header(), set_channels(), sipr_decoder_init(), smacker_read_header(), smka_decode_init(), sol_read_header(), speex_header(), str_read_packet(), stream_component_open(), tak_decode_frame(), tak_read_header(), tmv_read_header(), transcode_init(), truespeech_decode_init(), tta_decode_init(), twin_decode_init(), validate_options(), vid_read_packet(), vmd_read_header(), vmdaudio_decode_init(), vorbis_decode_frame(), vorbis_decode_init(), wavpack_decode_block(), wavpack_decode_init(), wc3_read_header(), wmavoice_decode_init(), ws_snd_decode_init(), wsaud_read_header(), wv_read_header(), and yop_read_header().

uint64_t AVCodecContext::request_channel_layout

Request decoder to use this channel layout if it can (0 for default)

• encoding: unused
• decoding: Set by user.

Definition at line 2398 of file avcodec.h.

Referenced by dca_decode_frame(), mlp_parse(), output_configure(), and read_restart_header().

enum AVAudioServiceType AVCodecContext::audio_service_type

Type of service that the audio stream conveys.

• encoding: Set by user.
• decoding: Set by libavcodec.

Definition at line 2405 of file avcodec.h.

Referenced by ac3_decode_frame(), avformat_find_stream_info(), ff_aac_ac3_parse(), ff_ac3_encode_init(), ff_ac3_validate_metadata(), mov_read_dac3(), mov_read_dec3(), and transcode_init().

enum AVSampleFormat AVCodecContext::request_sample_fmt

desired sample format

• encoding: Not used.
• decoding: Set by user. Decoder will decode to this format if it can.

Definition at line 2413 of file avcodec.h.

Referenced by alac_decode_init(), decode_init(), flac_set_bps(), and libopus_decode_init().

int(* AVCodecContext::get_buffer)(struct AVCodecContext *c, AVFrame *pic)

Called at the beginning of each frame to get a buffer for it.

The function will set AVFrame.data[], AVFrame.linesize[]. AVFrame.extended_data[] must also be set, but it should be the same as AVFrame.data[] except for planar audio with more channels than can fit in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as many data pointers as it can hold.

if CODEC_CAP_DR1 is not set then get_buffer() must call avcodec_default_get_buffer() instead of providing buffers allocated by some other means.

AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't need it. avcodec_default_get_buffer() aligns the output buffer properly, but if get_buffer() is overridden then alignment considerations should be taken into account.

See Also

avcodec_default_get_buffer()

Video:

If pic.reference is set then the frame will be read later by libavcodec. avcodec_align_dimensions2() should be used to find the required width and height, as they normally need to be rounded up to the next multiple of 16.

If frame multithreading is used and thread_safe_callbacks is set, it may be called from a different thread, but not from more than one at once. Does not need to be reentrant.

See Also

release_buffer(), reget_buffer()

avcodec_align_dimensions2()

Audio:

Decoders request a buffer of a particular size by setting AVFrame.nb_samples prior to calling get_buffer(). The decoder may, however, utilize only part of the buffer by setting AVFrame.nb_samples to a smaller value in the output frame.

Decoders cannot use the buffer after returning from avcodec_decode_audio4(), so they will not call release_buffer(), as it is assumed to be released immediately upon return. In some rare cases, a decoder may need to call get_buffer() more than once in a single call to avcodec_decode_audio4(). In that case, when get_buffer() is called again after it has already been called once, the previously acquired buffer is assumed to be released at that time and may not be reused by the decoder.

As a convenience, av_samples_get_buffer_size() and av_samples_fill_arrays() in libavutil may be used by custom get_buffer() functions to find the required data size and to fill data pointers and linesize. In AVFrame.linesize, only linesize[0] may be set for audio since all planes must be the same size.

See Also

av_samples_get_buffer_size(), av_samples_fill_arrays()

• encoding: unused
• decoding: Set by libavcodec, user can override.

Definition at line 2475 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), ff_get_buffer(), ff_thread_can_start_frame(), ff_thread_get_buffer(), frame_worker_thread(), init_input_stream(), submit_packet(), update_context_from_user(), vdadec_init(), and video_thread().

void(* AVCodecContext::release_buffer)(struct AVCodecContext *c, AVFrame *pic)

Called to release buffers which were allocated with get_buffer.

A released buffer can be reused in get_buffer(). pic.data[*] must be set to NULL. May be called from a different thread if frame multithreading is used, but not by more than one thread at once, so does not need to be reentrant.

• encoding: unused
• decoding: Set by libavcodec, user can override.

Definition at line 2486 of file avcodec.h.

Referenced by aasc_decode_end(), aura_decode_end(), aura_decode_frame(), avcodec_default_reget_buffer(), avcodec_get_context_defaults3(), avs_decode_end(), avui_decode_close(), avui_decode_frame(), bethsoftvid_decode_end(), bfi_decode_close(), bfi_decode_frame(), bmp_decode_end(), bmp_decode_frame(), brpix_decode_frame(), brpix_end(), cavs_decode_frame(), cdg_decode_end(), cdg_decode_frame(), cdxl_decode_end(), cdxl_decode_frame(), cinepak_decode_end(), cinvideo_decode_end(), cllc_decode_close(), cllc_decode_frame(), cmv_decode_end(), cmv_decode_frame(), cmv_process_header(), copy_frame(), cyuv_decode_end(), cyuv_decode_frame(), decode_close(), decode_end(), decode_flush(), decode_frame(), decode_pic(), dfa_decode_end(), dfa_decode_frame(), dirac_decode_frame(), dvvideo_close(), dvvideo_decode_frame(), encode_end(), end(), escape124_decode_close(), escape124_decode_frame(), escape130_decode_close(), escape130_decode_frame(), execute_code(), ff_cavs_end(), ff_ivi_decode_close(), ff_ivi_decode_frame(), ff_mjpeg_decode_end(), ff_mjpeg_decode_sof(), ff_pnm_end(), ff_snow_common_end(), ff_snow_release_buffer(), ff_thread_release_buffer(), ff_vc1_decode_end(), ff_vp56_decode_frame(), ff_vp56_free_context(), ffv1_close(), flashsv_decode_end(), flashsv_decode_frame(), flic_decode_end(), flush(), free_picture(), free_sequence_buffers(), get_siz(), gif_decode_close(), gif_decode_frame(), idcin_decode_end(), idcin_decode_frame(), init_image(), init_input_stream(), ipvideo_decode_end(), ipvideo_decode_frame(), ir2_decode_end(), libschroedinger_decode_close(), libschroedinger_decode_frame(), mm_decode_end(), mp_decode_end(), msrle_decode_end(), mss1_decode_end(), mss2_decode_end(), mss2_decode_frame(), mss3_decode_end(), mss4_decode_end(), msvideo1_decode_end(), mvc_decode_end(), mxpeg_decode_end(), mxpeg_decode_frame(), paf_vid_close(), pcx_decode_frame(), pcx_end(), png_dec_end(), pnm_decode_frame(), ptx_decode_frame(), ptx_end(), qtrle_decode_end(), release_delayed_buffers(), rl2_decode_end(), rl2_decode_frame(), roq_decode_end(), roq_encode_end(), rpza_decode_end(), select_input_picture(), seqvideo_decode_end(), sgi_end(), sgirle_decode_end(), smc_decode_end(), Stagefright_close(), Stagefright_decode_frame(), sunrast_decode_frame(), sunrast_end(), svq1_decode_end(), svq1_decode_frame(), svq1_encode_end(), svq1_flush(), svq3_decode_frame(), targa_end(), tgq_decode_end(), tgq_decode_frame(), tiff_end(), tmv_decode_close(), tmv_decode_frame(), tqi_decode_end(), tqi_decode_frame(), truemotion1_decode_end(), truemotion1_decode_header(), tscc2_decode_end(), txd_decode_frame(), txd_end(), ulti_decode_end(), uninit(), update_context_from_user(), v308_decode_close(), v308_decode_frame(), v408_decode_close(), v408_decode_frame(), v410_decode_close(), v410_decode_frame(), vble_decode_close(), vble_decode_frame(), vcr1_decode_end(), vcr1_decode_frame(), vdadec_init(), video_thread(), vmdvideo_decode_end(), vmdvideo_decode_frame(), vqa_decode_end(), vqa_decode_frame(), worker(), xan_decode_end(), xan_decode_frame(), xbm_decode_close(), xbm_decode_frame(), xface_decode_close(), xface_decode_frame(), xwd_decode_close(), xwd_decode_frame(), y216_decode_close(), y216_decode_frame(), y41p_decode_close(), y41p_decode_frame(), yop_decode_close(), yop_decode_frame(), yuv4_decode_close(), yuv4_decode_frame(), zero12v_decode_close(), zero12v_decode_frame(), zerocodec_decode_close(), and zerocodec_decode_frame().

int(* AVCodecContext::reget_buffer)(struct AVCodecContext *c, AVFrame *pic)

Called at the beginning of a frame to get cr buffer for it.

Buffer type (size, hints) must be the same. libavcodec won't check it. libavcodec will pass previous buffer in pic, function should return same buffer or new buffer with old frame "painted" into it. If pic.data[0] == NULL must behave like get_buffer(). if CODEC_CAP_DR1 is not set then reget_buffer() must call avcodec_default_reget_buffer() instead of providing buffers allocated by some other means.

• encoding: unused
• decoding: Set by libavcodec, user can override.

Definition at line 2500 of file avcodec.h.

Referenced by aasc_decode_frame(), avcodec_get_context_defaults3(), avs_decode_frame(), bethsoftvid_decode_frame(), cdg_decode_frame(), cinepak_decode_frame(), cinvideo_decode_frame(), cpia_decode_frame(), decode_frame(), flashsv_decode_frame(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), gif_decode_frame(), ir2_decode_frame(), mm_decode_frame(), mp_decode_frame(), msrle_decode_frame(), mss1_decode_frame(), mss2_decode_frame(), mss3_decode_frame(), mss4_decode_frame(), msvideo1_decode_frame(), mvc_decode_frame(), paf_vid_decode(), qtrle_decode_frame(), roq_decode_frame(), rpza_decode_frame(), seqvideo_decode_frame(), sgirle_decode_frame(), smc_decode_frame(), truemotion1_decode_frame(), tscc2_decode_frame(), ulti_decode_frame(), and xan_decode_frame().

float AVCodecContext::qcompress

amount of qscale change between easy & hard scenes (0.0-1.0)

Definition at line 2504 of file avcodec.h.

Referenced by add_codec(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_qscale(), vpx_init(), X264_init(), and XAVS_init().

float AVCodecContext::qblur

amount of qscale smoothing over time (0.0-1.0)

Definition at line 2505 of file avcodec.h.

Referenced by add_codec(), ff_rate_control_init(), ff_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), init_pass2(), X264_init(), and XAVS_init().

int AVCodecContext::qmin

minimum quantizer

• encoding: Set by user.
• decoding: unused

Definition at line 2512 of file avcodec.h.

Referenced by add_codec(), avcodec_string(), compute_status(), encode_thread(), ff_init_qscale_tab(), ff_MPV_encode_init(), ff_xvid_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), init_pass2(), parse_ffconfig(), update_qscale(), vpx_init(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::qmax

maximum quantizer

• encoding: Set by user.
• decoding: unused

Definition at line 2519 of file avcodec.h.

Referenced by add_codec(), avcodec_string(), compute_status(), dnxhd_encode_rdo(), dnxhd_find_qscale(), dnxhd_init_qmat(), dnxhd_init_rc(), encode_thread(), ff_init_qscale_tab(), ff_MPV_encode_init(), ff_xvid_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), init_pass2(), parse_ffconfig(), update_qscale(), vpx_init(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::max_qdiff

maximum quantizer difference between frames

• encoding: Set by user.
• decoding: unused

Definition at line 2526 of file avcodec.h.

Referenced by add_codec(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), parse_ffconfig(), X264_init(), and XAVS_init().

float AVCodecContext::rc_qsquish

ratecontrol qmin qmax limiting method 0-> clipping, 1-> use a nice continuous function to limit qscale wthin qmin/qmax.

• encoding: Set by user.
• decoding: unused

Definition at line 2534 of file avcodec.h.

Referenced by modify_qscale().

float AVCodecContext::rc_qmod_amp

Definition at line 2536 of file avcodec.h.

Referenced by modify_qscale().

int AVCodecContext::rc_qmod_freq

Definition at line 2537 of file avcodec.h.

Referenced by modify_qscale().

int AVCodecContext::rc_buffer_size

decoder bitstream buffer size

• encoding: Set by user.
• decoding: unused

Definition at line 2544 of file avcodec.h.

Referenced by add_codec(), avcodec_open2(), ff_MPV_encode_init(), ff_MPV_encode_picture(), ff_rate_control_init(), ff_vbv_update(), ff_xvid_rate_control_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), init_pass2(), load_input_picture(), modify_qscale(), mov_write_esds_tag(), mpeg1_decode_sequence(), mpeg1_encode_sequence_header(), mpeg_decode_sequence_extension(), mpeg_mux_init(), parse_ffconfig(), select_input_picture(), transcode_init(), vpx_init(), X264_init(), and XAVS_init().

int AVCodecContext::rc_override_count

ratecontrol override, see RcOverride

• encoding: Allocated/set/freed by user.
• decoding: unused

Definition at line 2551 of file avcodec.h.

Referenced by avcodec_copy_context(), get_qscale(), and new_video_stream().

RcOverride* AVCodecContext::rc_override

Definition at line 2552 of file avcodec.h.

Referenced by avcodec_copy_context(), get_qscale(), and new_video_stream().

const char* AVCodecContext::rc_eq

rate control equation

• encoding: Set by user
• decoding: unused

Definition at line 2559 of file avcodec.h.

Referenced by add_codec(), avcodec_copy_context(), ff_rate_control_init(), ffm2_read_header(), ffm_close(), ffm_read_header(), ffm_write_header(), and get_qscale().

int AVCodecContext::rc_max_rate

maximum bitrate

• encoding: Set by user.
• decoding: unused

Definition at line 2566 of file avcodec.h.

Referenced by add_codec(), ff_MPV_encode_init(), ff_MPV_encode_picture(), ff_rate_control_init(), ff_vbv_update(), ff_xvid_rate_control_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), modify_qscale(), mov_write_esds_tag(), mpeg1_encode_sequence_header(), mpeg_decode_postinit(), mpeg_mux_init(), mpegvideo_extract_headers(), oggvorbis_init_encoder(), parse_ffconfig(), transcode_init(), vpx_init(), X264_init(), and XAVS_init().

int AVCodecContext::rc_min_rate

minimum bitrate

• encoding: Set by user.
• decoding: unused

Definition at line 2573 of file avcodec.h.

Referenced by ff_MPV_encode_init(), ff_MPV_encode_picture(), ff_vbv_update(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), modify_qscale(), oggvorbis_init_encoder(), parse_ffconfig(), and vpx_init().

float AVCodecContext::rc_buffer_aggressivity

Definition at line 2575 of file avcodec.h.

Referenced by add_codec(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), modify_qscale(), and vpx_init().

float AVCodecContext::rc_initial_cplx

initial complexity for pass1 ratecontrol

• encoding: Set by user.
• decoding: unused

Definition at line 2582 of file avcodec.h.

Referenced by ff_rate_control_init().

float AVCodecContext::rc_max_available_vbv_use

Ratecontrol attempt to use, at maximum, of what can be used without an underflow.

• encoding: Set by user.
• decoding: unused.

Definition at line 2589 of file avcodec.h.

Referenced by ff_MPV_encode_picture(), ff_rate_control_init(), and modify_qscale().

float AVCodecContext::rc_min_vbv_overflow_use

Ratecontrol attempt to use, at least, times the amount needed to prevent a vbv overflow.

• encoding: Set by user.
• decoding: unused.

Definition at line 2596 of file avcodec.h.

Referenced by modify_qscale().

int AVCodecContext::rc_initial_buffer_occupancy

Number of bits which should be loaded into the rc buffer before decoding starts.

• encoding: Set by user.
• decoding: unused

Definition at line 2603 of file avcodec.h.

Referenced by avcodec_open2(), ff_rate_control_init(), ff_xvid_rate_control_init(), vpx_init(), X264_init(), and XAVS_init().

int AVCodecContext::coder_type

coder type

• encoding: Set by user.
• decoding: unused

Definition at line 2615 of file avcodec.h.

Referenced by encode_frame(), encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), libschroedinger_encode_init(), read_extra_header(), read_header(), sunrast_encode_init(), targa_encode_frame(), and X264_init().

int AVCodecContext::context_model

context model

• encoding: Set by user.
• decoding: unused

Definition at line 2622 of file avcodec.h.

Referenced by encode_init(), encode_plane(), encode_rgb_frame(), encode_slice_header(), and write_header().

int AVCodecContext::lmin

minimum Lagrange multipler

• encoding: Set by user.
• decoding: unused

Definition at line 2629 of file avcodec.h.

Referenced by get_qminmax().

int AVCodecContext::lmax

maximum Lagrange multipler

• encoding: Set by user.
• decoding: unused

Definition at line 2636 of file avcodec.h.

Referenced by ff_MPV_encode_picture(), and get_qminmax().

int AVCodecContext::frame_skip_threshold

frame skip threshold

• encoding: Set by user.
• decoding: unused

Definition at line 2643 of file avcodec.h.

Referenced by select_input_picture(), skip_check(), and vpx_init().

int AVCodecContext::frame_skip_factor

frame skip factor

• encoding: Set by user.
• decoding: unused

Definition at line 2650 of file avcodec.h.

Referenced by select_input_picture(), and skip_check().

int AVCodecContext::frame_skip_exp

frame skip exponent

• encoding: Set by user.
• decoding: unused

Definition at line 2657 of file avcodec.h.

Referenced by skip_check().

int AVCodecContext::frame_skip_cmp

frame skip comparison function

• encoding: Set by user.
• decoding: unused

Definition at line 2664 of file avcodec.h.

Referenced by add_codec(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), and ffm_write_header().

int AVCodecContext::trellis

trellis RD quantization

• encoding: Set by user.
• decoding: unused

Definition at line 2671 of file avcodec.h.

Referenced by adpcm_compress_trellis(), adpcm_encode_init(), encode_block(), encode_end(), encode_init(), ff_dct_encode_init(), ff_MPV_encode_init(), g722_encode_init(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::min_prediction_order

• encoding: Set by user.
• decoding: unused

Definition at line 2677 of file avcodec.h.

Referenced by alac_encode_init(), and flac_encode_init().

int AVCodecContext::max_prediction_order

• encoding: Set by user.
• decoding: unused

Definition at line 2683 of file avcodec.h.

Referenced by alac_encode_init(), and flac_encode_init().

int64_t AVCodecContext::timecode_frame_start

GOP timecode frame start number.

• encoding: Set by user, in non drop frame format
• decoding: Set by libavcodec (timecode in the 25 bits format, -1 if unset)

Definition at line 2690 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), encode_init(), mpeg1_encode_sequence_header(), mpeg_decode_gop(), and show_stream().

void(* AVCodecContext::rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb)

Definition at line 2698 of file avcodec.h.

Referenced by encode_thread().

int AVCodecContext::rtp_payload_size

Definition at line 2700 of file avcodec.h.

Referenced by encode_thread(), ff_MPV_encode_init(), and X264_init().

int AVCodecContext::mv_bits

Definition at line 2708 of file avcodec.h.

Referenced by encode_frame(), and ff_MPV_encode_picture().

int AVCodecContext::header_bits

Definition at line 2709 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

int AVCodecContext::i_tex_bits

Definition at line 2710 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

int AVCodecContext::p_tex_bits

Definition at line 2711 of file avcodec.h.

Referenced by encode_frame(), and ff_MPV_encode_picture().

int AVCodecContext::i_count

Definition at line 2712 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

int AVCodecContext::p_count

Definition at line 2713 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

int AVCodecContext::skip_count

Definition at line 2714 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

int AVCodecContext::misc_bits

Definition at line 2715 of file avcodec.h.

Referenced by encode_frame(), and ff_MPV_encode_picture().

int AVCodecContext::frame_bits

number of bits used for the previously encoded frame

• encoding: Set by libavcodec.
• decoding: unused

Definition at line 2722 of file avcodec.h.

Referenced by aac_encode_frame(), encode_frame(), and ff_MPV_encode_picture().

char* AVCodecContext::stats_out

pass1 encoding statistics output buffer

• encoding: Set by libavcodec.
• decoding: unused

Definition at line 2729 of file avcodec.h.

Referenced by avcodec_encode_video2(), do_video_out(), encode_close(), encode_end(), encode_frame(), encode_init(), ff_MPV_common_end(), ff_MPV_common_init(), ff_write_pass1_stats(), ffv1_close(), flush_encoders(), get_stats(), vp8_encode(), vp8_free(), xvid_encode_close(), and xvid_encode_frame().

char* AVCodecContext::stats_in

pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed here.

• encoding: Allocated/set/freed by user.
• decoding: unused

Definition at line 2737 of file avcodec.h.

Referenced by encode_init(), ff_rate_control_init(), submit_stats(), transcode(), transcode_init(), vpx_init(), and xvid_encode_init().

int AVCodecContext::workaround_bugs

Work around bugs in encoders which sometimes cannot be detected automatically.

• encoding: Set by user
• decoding: Set by user

Definition at line 2744 of file avcodec.h.

Referenced by ff_h263_decode_init(), ff_h264_decode_init(), ff_mpeg4_set_direct_mv(), and stream_component_open().

int AVCodecContext::strict_std_compliance

strictly follow the standard (MPEG4, ...).

• encoding: Set by user.
• decoding: Set by user. Setting this to STRICT or higher means the encoder and decoder will generally do stupid things, whereas setting it to unofficial or lower will mean the encoder might produce output that is not supported by all spec-compliant decoders. Decoders don't differentiate between normal, unofficial and experimental (that is, they always try to decode things when they can) unless they are explicitly asked to behave stupidly (=strictly conform to the specs)

Definition at line 2774 of file avcodec.h.

Referenced by amr_wb_encode_init(), avcodec_open2(), choose_pix_fmts(), choose_pixel_fmt(), config(), decode_postinit(), encode_init(), ff_fix_long_p_mvs(), ff_get_best_fcode(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), find_frame_rate_index(), libgsm_encode_init(), mov_get_codec_tag(), mp3_header_compress(), parse_ffconfig(), and validate_codec_tag().

int AVCodecContext::error_concealment

error concealment flags

• encoding: unused
• decoding: Set by user.

Definition at line 2786 of file avcodec.h.

Referenced by ff_er_frame_end(), guess_mv(), and stream_component_open().

int AVCodecContext::debug

debug

• encoding: Set by user.
• decoding: Set by user.

Definition at line 2795 of file avcodec.h.

Referenced by audio_get_buffer(), avcodec_default_release_buffer(), check_keyboard_interaction(), decode_chunks(), decode_ext_header(), decode_fill(), decode_frame(), decode_init(), decode_nal_units(), decode_picture_timing(), decode_slice_header(), decode_unregistered_user_data(), decode_vol_header(), decode_vop_header(), ff_alloc_picture(), ff_er_frame_end(), ff_flv_decode_picture_header(), ff_h263_decode_frame(), ff_h263_show_pict_info(), ff_h264_decode_picture_parameter_set(), ff_h264_decode_sei(), ff_h264_decode_seq_parameter_set(), ff_h264_execute_ref_pic_marking(), ff_jpegls_decode_picture(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_sos(), ff_mpeg4_decode_picture_header(), ff_msmpeg4_decode_picture_header(), ff_print_debug_info2(), ff_rate_estimate_qscale(), ff_thread_await_progress(), ff_thread_release_buffer(), ff_thread_report_progress(), ff_vbv_update(), ff_wmv2_decode_secondary_picture_header(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), find_short(), frame_thread_init(), libschroedinger_decode_init(), libschroedinger_encode_init(), mjpeg_decode_app(), mjpeg_decode_com(), mjpegb_decode_frame(), modify_qscale(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg_decode_gop(), mpeg_decode_picture_display_extension(), mpeg_decode_sequence_display_extension(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), MPV_decode_mb_internal(), parse_ffconfig(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), predict_slice(), predict_slice_buffered(), print_long_term(), print_short_term(), remove_short(), rv10_decode_init(), rv20_decode_picture_header(), svq3_decode_frame(), transcode_init(), truemotion1_decode_header(), update_context_from_user(), vc1_decode_frame(), and video_get_buffer().

int AVCodecContext::debug_mv

debug

• encoding: Set by user.
• decoding: Set by user.

Definition at line 2819 of file avcodec.h.

Referenced by ff_alloc_picture(), ff_print_debug_info2(), frame_thread_init(), and update_context_from_user().

int AVCodecContext::err_recognition

Error recognition; may misdetect some more or less valid parts as errors.

• encoding: unused
• decoding: Set by user.

Definition at line 2829 of file avcodec.h.

Referenced by aac_decode_init(), ac3_decode_frame(), decode_chunks(), decode_frame(), decode_init(), decode_region_inter(), decode_region_masked(), decode_slice(), decode_slice_header(), ff_er_add_slice(), ff_er_frame_end(), ff_er_frame_start(), ff_h263_decode_frame(), ff_h264_execute_ref_pic_marking(), ff_mjpeg_decode_frame(), ff_MPV_frame_start(), flac_decode_frame(), h261_decode_gob_header(), mjpegb_decode_frame(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg4_decode_mb(), mpeg_decode_frame(), mpeg_decode_slice(), mxpeg_decode_frame(), read_specific_config(), slice_decode_thread(), tak_decode_frame(), tta_decode_frame(), tta_decode_init(), v410_decode_init(), wv_unpack_mono(), and wv_unpack_stereo().

int64_t AVCodecContext::reordered_opaque

opaque 64bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque

Deprecated:

in favor of pkt_pts

• encoding: unused
• decoding: Set by user.

Definition at line 2847 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), ff_init_buffer_info(), raw_decode(), Stagefright_decode_frame(), and update_context_from_user().

struct AVHWAccel* AVCodecContext::hwaccel

Hardware accelerator in use.

• encoding: unused.
• decoding: Set by libavcodec

Definition at line 2854 of file avcodec.h.

Referenced by alloc_frame_buffer(), alloc_picture(), avcodec_copy_context(), decode_nal_units(), decode_slice(), execute_decode_slices(), ff_draw_horiz_band(), ff_er_add_slice(), ff_er_frame_end(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_frame_start(), ff_MPV_frame_end(), ff_print_debug_info2(), field_end(), get_consumed_bytes(), h264_slice_header_init(), mpeg_decode_slice(), mpeg_field_start(), slice_end(), vc1_decode_frame(), vc1_decode_init(), and vcr2_init_sequence().

void* AVCodecContext::hwaccel_context

Hardware accelerator context.

For some hardware accelerators, a global context needs to be provided by the user. In that case, this holds display-dependent data FFmpeg cannot instantiate itself. Please refer to the FFmpeg HW accelerator documentation to know how to fill this is. e.g. for VA API, this is a struct vaapi_context.

• encoding: unused
• decoding: Set by user

Definition at line 2866 of file avcodec.h.

Referenced by commit_bitstream_and_slice_buffer(), dxva2_h264_decode_slice(), dxva2_h264_start_frame(), dxva2_mpeg2_start_frame(), dxva2_vc1_start_frame(), ff_dxva2_common_end_frame(), ff_vaapi_common_end_frame(), ff_vaapi_mpeg_end_frame(), ff_vdpau_add_buffer(), ff_vdpau_common_start_frame(), ff_vdpau_mpeg_end_frame(), fill_slice_long(), vaapi_h264_decode_slice(), vaapi_h264_end_frame(), vaapi_h264_start_frame(), vaapi_mpeg2_decode_slice(), vaapi_mpeg2_start_frame(), vaapi_mpeg4_decode_slice(), vaapi_mpeg4_start_frame(), vaapi_vc1_decode_slice(), vaapi_vc1_start_frame(), vda_h264_decode_slice(), vda_h264_end_frame(), vda_h264_start_frame(), vdadec_init(), vdpau_h264_decode_slice(), vdpau_h264_end_frame(), vdpau_h264_set_reference_frames(), vdpau_h264_start_frame(), vdpau_mpeg4_start_frame(), vdpau_mpeg_decode_slice(), vdpau_mpeg_start_frame(), vdpau_vc1_decode_slice(), and vdpau_vc1_start_frame().

uint64_t AVCodecContext::error[AV_NUM_DATA_POINTERS]

error

• encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
• decoding: unused

Definition at line 2873 of file avcodec.h.

Referenced by encode_frame(), estimate_best_b_count(), ff_MPV_encode_picture(), print_report(), and storeframe().

int AVCodecContext::dct_algo

DCT algorithm, see FF_DCT_* below.

• encoding: Set by user.
• decoding: unused

Definition at line 2880 of file avcodec.h.

Referenced by ff_dct_encode_init_x86(), ff_dsputil_init(), ff_dsputil_init_bfin(), ff_dsputil_init_ppc(), ff_MPV_common_init_altivec(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), and parse_ffconfig().

int AVCodecContext::idct_algo

IDCT algorithm, see FF_IDCT_* below.

• encoding: Set by user.
• decoding: Set by user.

Definition at line 2893 of file avcodec.h.

Referenced by decode_init(), dsputil_init_sse2(), ff_dsputil_init(), ff_dsputil_init_alpha(), ff_dsputil_init_arm(), ff_dsputil_init_armv5te(), ff_dsputil_init_armv6(), ff_dsputil_init_bfin(), ff_dsputil_init_mmx(), ff_dsputil_init_neon(), ff_dsputil_init_ppc(), ff_dsputil_init_sh4(), ff_dsputil_init_vis(), ff_h263_decode_frame(), parse_ffconfig(), stream_component_open(), update_context_from_thread(), and vcr2_init_sequence().

int AVCodecContext::bits_per_coded_sample

bits per sample/pixel from the demuxer (needed for huffyuv).

• encoding: Set by libavcodec.
• decoding: Set by user.

Definition at line 2936 of file avcodec.h.

Referenced by aasc_decode_frame(), aasc_decode_init(), adpcm_decode_init(), adpcm_encode_init(), aiff_write_header(), apc_read_header(), ape_decode_init(), ape_read_header(), asf_read_stream_properties(), av_get_audio_frame_duration(), avformat_find_stream_info(), avi_read_header(), avisynth_read_header(), avr_read_header(), avs_read_packet(), avui_decode_frame(), bfi_read_header(), bmp_encode_frame(), bmp_encode_init(), cin_read_header(), cinepak_decode_init(), cmap_read_palette(), create_audio_stream(), daud_header(), decode_frame(), decode_init(), decode_wave_header(), dshow_add_device(), ea_read_header(), encode_frame(), encode_init(), epaf_read_header(), ff_mov_read_stsd_entries(), ff_voc_get_packet(), film_read_header(), flv_read_packet(), flv_same_audio_codec(), flv_set_audio_codec(), fourxm_read_header(), g722_read_header(), get_aiff_header(), get_audio_flags(), get_codec_data(), get_packet_header(), get_sindex(), ico_write_packet(), idcin_read_header(), iff_read_header(), ipmovie_read_header(), ipvideo_decode_init(), ircam_read_header(), iss_read_header(), lag_decode_frame(), lvf_read_header(), matroska_read_header(), mkv_write_tracks(), mmf_read_header(), mov_get_rawvideo_codec_tag(), mov_write_video_tag(), mpc8_read_header(), mpc_read_header(), mpegps_read_packet(), msrle_decode_frame(), msrle_decode_init(), msvideo1_decode_init(), mv_read_header(), mxf_get_d10_aes3_packet(), mxf_parse_structural_metadata(), mxg_read_header(), nist_read_header(), nsv_parse_NSVs_header(), nuv_header(), oma_read_header(), parse_audio_var(), parse_media_type(), pcm_bluray_parse_header(), pcm_decode_frame(), pcm_encode_init(), pcm_read_header(), png_enc_init(), pvf_read_header(), qtrle_decode_frame(), qtrle_decode_init(), qtrle_encode_init(), raw_decode(), raw_init_decoder(), raw_init_encoder(), read_desc_chunk(), read_header(), read_packet(), rl2_read_header(), roq_read_packet(), rpl_read_header(), rtp_write_packet(), s302m_decode_frame(), s302m_parse_frame_header(), seq_read_header(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smka_decode_init(), sox_read_header(), tak_decode_init(), tak_read_header(), targa_encode_frame(), tmv_read_header(), transcode_init(), tta_decode_init(), tta_read_header(), update_context_from_thread(), utvideo_encode_init(), vfw_read_header(), vid_read_packet(), vivo_read_header(), vmd_read_header(), vmdaudio_decode_init(), voc_write_packet(), wavpack_decode_init(), wc3_read_header(), wsaud_read_header(), wsvqa_read_packet(), wv_read_header(), xmv_read_header(), xwma_read_header(), and y41p_encode_init().

int AVCodecContext::bits_per_raw_sample

Bits per sample/pixel of internal libavcodec pixel/sample format.

• encoding: set by user.
• decoding: set by libavcodec.

Definition at line 2943 of file avcodec.h.

Referenced by alac_decode_init(), alac_encode_frame(), alac_encode_init(), avcodec_string(), avpriv_flac_parse_streaminfo(), cllc_decode_frame(), common_init(), copy_samples(), decode_channel(), decode_frame(), decode_init(), decode_plane(), decode_rgb_frame(), decode_slice_header(), dnxhd_decode_header(), dnxhd_encode_init(), dsputil_init_3dnow(), dsputil_init_mmx(), dsputil_init_mmxext(), dsputil_init_sse(), dsputil_init_sse2(), encode_init(), ff_dct_common_init(), ff_dsputil_init(), ff_dsputil_init_align(), ff_dsputil_init_alpha(), ff_dsputil_init_altivec(), ff_dsputil_init_arm(), ff_dsputil_init_armv5te(), ff_dsputil_init_armv6(), ff_dsputil_init_bfin(), ff_dsputil_init_mmx(), ff_dsputil_init_neon(), ff_dsputil_init_ppc(), ff_dsputil_init_sh4(), ff_dsputil_init_vis(), ff_h264_decode_init(), flac_encode_frame(), flac_encode_init(), h264_set_parameter_from_sps(), init_frame(), init_sample_buffers(), libopenjpeg_decode_frame(), mlp_parse(), new_video_stream(), pcm_bluray_parse_header(), pcm_decode_init(), read_const_block_data(), read_extra_header(), read_header(), read_major_sync(), read_var_block_data(), set_bps_params(), tak_decode_frame(), tak_decode_init(), transcode_init(), tta_decode_init(), update_context_from_thread(), update_md5_sum(), utvideo_decode_init(), v410_decode_init(), vble_decode_init(), wavpack_decode_frame(), write_element(), write_streaminfo(), y216_decode_init(), y41p_decode_init(), zero12v_decode_init(), and zerocodec_decode_init().

int AVCodecContext::lowres

low resolution decoding, 1-> 1/2 size, 2->1/4 size

• encoding: unused
• decoding: Set by user.

Definition at line 2950 of file avcodec.h.

Referenced by add_input_streams(), avcodec_align_dimensions2(), avcodec_open2(), avcodec_set_dimensions(), chroma_4mv_motion_lowres(), decode_slice(), dv_decode_video_segment(), ff_dsputil_init(), ff_dsputil_init_alpha(), ff_dsputil_init_arm(), ff_dsputil_init_armv5te(), ff_dsputil_init_armv6(), ff_dsputil_init_mmx(), ff_dsputil_init_neon(), ff_dsputil_init_ppc(), ff_dvvideo_init(), ff_er_frame_end(), ff_h263_decode_picture_header(), ff_init_block_index(), ff_intel_h263_decode_picture_header(), ff_mjpeg_decode_sof(), ff_MPV_decode_mb(), ff_MPV_frame_end(), ff_update_block_index(), hpel_motion_lowres(), init(), libopenjpeg_decode_frame(), mjpeg_decode_scan(), mjpeg_decode_scan_progressive_ac(), mpeg_decode_slice(), mpeg_motion_lowres(), MPV_decode_mb_internal(), MPV_motion_lowres(), rv20_decode_picture_header(), and stream_component_open().

AVFrame* AVCodecContext::coded_frame

the picture in the bitstream

• encoding: Set by libavcodec.
• decoding: Set by libavcodec.

Examples:

doc/examples/muxing.c.

Definition at line 2957 of file avcodec.h.

Referenced by a64multi_init_encoder(), aac_encode_close(), aac_encode_end(), aac_encode_init(), aacPlus_encode_close(), aacPlus_encode_init(), adpcm_encode_close(), adpcm_encode_init(), adx_encode_init(), alac_encode_close(), alac_encode_init(), alloc_buffers(), amr_wb_encode_close(), amr_wb_encode_init(), avcodec_close(), avui_decode_close(), avui_decode_frame(), avui_decode_init(), avui_encode_close(), avui_encode_frame(), avui_encode_init(), bmp_decode_init(), bmp_encode_init(), brpix_init(), cllc_decode_close(), cllc_decode_frame(), cllc_decode_init(), common_init(), decode_close(), decode_frame(), decode_init(), decode_init_thread_copy(), decode_slice(), decode_slice_thread(), decoder_init(), dnxhd_decode_init(), dnxhd_encode_init(), do_video_out(), do_video_stats(), encode_close(), encode_end(), encode_frame(), encode_init(), encode_init_ls(), Faac_encode_close(), Faac_encode_init(), ff_ac3_encode_close(), ff_ac3_encode_init(), ff_asv_common_init(), ff_dvvideo_init(), ff_MPV_common_init(), ff_MPV_frame_end(), ff_pnm_init(), ff_wma_end(), filter(), find_quant_thread(), flac_encode_close(), flac_encode_init(), flashsv2_encode_frame(), flashsv_encode_frame(), g722_encode_close(), g722_encode_init(), gif_decode_init(), gif_encode_init(), ilbc_encode_close(), ilbc_encode_init(), j2kdec_init(), libgsm_encode_close(), libgsm_encode_init(), libopenjpeg_decode_init(), libopenjpeg_decode_init_thread_copy(), libopenjpeg_encode_close(), libopenjpeg_encode_init(), libschroedinger_encode_frame(), libschroedinger_encode_init(), mp3lame_encode_close(), mp3lame_encode_init(), MPA_encode_close(), MPA_encode_init(), mss1_decode_init(), mss2_decode_init(), mss3_decode_init(), mss4_decode_init(), mvc_decode_end(), mvc_decode_frame(), mvc_decode_init(), oggvorbis_encode_close(), oggvorbis_encode_init(), pcm_encode_close(), pcm_encode_init(), pcx_encode_init(), pcx_init(), png_enc_init(), print_report(), prores_encode_close(), prores_encode_init(), ptx_init(), qtrle_encode_init(), ra144_encode_close(), ra144_encode_init(), raw_decode(), raw_init_decoder(), raw_init_encoder(), roq_dpcm_encode_close(), roq_dpcm_encode_init(), roq_encode_video(), sgi_init(), sgirle_decode_end(), sgirle_decode_frame(), sgirle_decode_init(), sunrast_encode_init(), sunrast_init(), svq1_encode_init(), targa_encode_init(), targa_init(), tiff_init(), tscc2_decode_init(), txd_init(), ulti_decode_init(), update_context_from_thread(), utvideo_decode_close(), utvideo_decode_frame(), utvideo_decode_init(), utvideo_encode_close(), utvideo_encode_frame(), utvideo_encode_init(), v308_decode_close(), v308_decode_frame(), v308_decode_init(), v308_encode_close(), v308_encode_frame(), v308_encode_init(), v408_decode_close(), v408_decode_frame(), v408_decode_init(), v408_encode_close(), v408_encode_frame(), v408_encode_init(), v410_decode_close(), v410_decode_frame(), v410_decode_init(), v410_encode_close(), v410_encode_frame(), v410_encode_init(), v4l2_read_packet(), vble_decode_close(), vble_decode_frame(), vble_decode_init(), vble_restore_plane(), vcr1_common_init(), vorbis_encode_close(), vorbis_encode_init(), vp8_encode(), vp8_free(), vpx_init(), wavesynth_init(), write_video_frame(), X264_init(), XAVS_init(), xbm_decode_close(), xbm_decode_frame(), xbm_decode_init(), xbm_encode_close(), xbm_encode_init(), xface_encode_close(), xface_encode_init(), xvid_encode_init(), xwd_decode_close(), xwd_decode_frame(), xwd_decode_init(), xwd_encode_close(), xwd_encode_frame(), xwd_encode_init(), y216_decode_close(), y216_decode_frame(), y216_decode_init(), y41p_decode_close(), y41p_decode_frame(), y41p_decode_init(), y41p_encode_close(), y41p_encode_frame(), y41p_encode_init(), yuv4_decode_close(), yuv4_decode_frame(), yuv4_decode_init(), yuv4_encode_close(), yuv4_encode_frame(), yuv4_encode_init(), zero12v_decode_close(), zero12v_decode_frame(), zero12v_decode_init(), zerocodec_decode_close(), zerocodec_decode_frame(), and zerocodec_decode_init().

int AVCodecContext::thread_count

thread count is used to decide how many independent tasks should be passed to execute()

• encoding: Set by user.
• decoding: Set by user.

Definition at line 2965 of file avcodec.h.

Referenced by avcodec_close(), avcodec_open2(), avcodec_thread_execute(), avformat_find_stream_info(), decode_chunks(), decode_frame(), dnxhd_encode_end(), dnxhd_encode_init(), dnxhd_load_picture(), encode_close(), encode_init(), ff_frame_thread_encoder_free(), ff_frame_thread_encoder_init(), ff_h264_alloc_tables(), ff_MPV_common_init(), ff_MPV_encode_init(), ff_thread_decode_frame(), ff_thread_flush(), ff_thread_free(), ff_thread_video_encode_frame(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), frame_thread_init(), h264_slice_header_init(), pic_is_unused(), thread_free(), thread_init(), update_context_from_thread(), update_dimensions(), utvideo_encode_init(), validate_thread_parameters(), vp8_decode_frame(), vpx_init(), worker(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::thread_type

Which multithreading methods to use.

Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread, so clients which cannot provide future frames should not use it.

• encoding: Set by user, otherwise the default is used.
• decoding: Set by user, otherwise the default is used.

Definition at line 2975 of file avcodec.h.

Referenced by ff_frame_thread_encoder_init(), validate_thread_parameters(), and X264_init().

int AVCodecContext::active_thread_type

Which multithreading methods are in use by the codec.

• encoding: Set by libavcodec.
• decoding: Set by libavcodec.

Definition at line 2984 of file avcodec.h.

Referenced by avcodec_close(), avcodec_decode_video2(), avcodec_encode_video2(), avcodec_flush_buffers(), avcodec_open2(), avcodec_thread_execute(), await_reference_mb_row(), decode_chunks(), decode_nal_units(), decode_slice_header(), ff_er_add_slice(), ff_frame_thread_encoder_init(), ff_mjpeg_encode_stuffing(), ff_MPV_common_end(), ff_MPV_common_init(), ff_MPV_frame_start(), ff_rv34_decode_frame(), ff_thread_can_start_frame(), ff_thread_finish_setup(), ff_thread_free(), ff_thread_get_buffer(), ff_thread_init(), ff_thread_release_buffer(), field_end(), finish_frame(), frame_thread_init(), h264_slice_header_init(), jpeg_table_header(), mimic_decode_frame(), mpeg_field_start(), MPV_decode_mb_internal(), pic_is_unused(), render_slice(), rv34_decode_mv(), rv34_decode_slice(), rv34_mc(), slice_end(), thread_init(), update_dimensions(), validate_thread_parameters(), vp3_decode_frame(), vp3_draw_horiz_band(), vp8_decode_frame(), and vp8_decode_mb_row_sliced().

int AVCodecContext::thread_safe_callbacks

Set by the client if its custom get_buffer() callback can be called synchronously from another thread, which allows faster multithreaded decoding.

draw_horiz_band() will be called from other threads regardless of this setting. Ignored if the default get_buffer() is used.

• encoding: Set by user.
• decoding: Set by user.

Definition at line 2994 of file avcodec.h.

Referenced by ff_thread_can_start_frame(), ff_thread_get_buffer(), frame_worker_thread(), submit_packet(), and update_context_from_user().

int(* AVCodecContext::execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)

The codec may call this to execute several independent things.

It will return only after finishing all tasks. The user may replace this with some multithreaded implementation, the default implementation will execute the parts serially.

Parameters

count

the number of things to execute encoding: Set by libavcodec, user can override. decoding: Set by libavcodec, user can override.

Definition at line 3005 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), decode_chunks(), decode_component(), decode_frame(), decode_lowdelay(), decode_picture(), dvvideo_decode_frame(), encode_frame(), encode_picture(), execute_decode_slices(), and thread_init().

int(* AVCodecContext::execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)

The codec may call this to execute several independent things.

It will return only after finishing all tasks. The user may replace this with some multithreaded implementation, the default implementation will execute the parts serially. Also see avcodec_thread_init and e.g. the –enable-pthread configure option.

Parameters

c	context passed also to func
count	the number of things to execute
arg2	argument passed unchanged to func
ret	return values of executed functions, must have space for "count" values. May be NULL.
func	function that will be called count times, with jobnr from 0 to count-1. threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no two instances of func executing at the same time will have the same threadnr.

Returns

always 0 currently, but code should handle a future improvement where when any call to func returns < 0 no further calls to func may be done and < 0 is returned.

• encoding: Set by libavcodec, user can override.
• decoding: Set by libavcodec, user can override.

Definition at line 3025 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), decode_frame(), decode_picture(), dnxhd_encode_fast(), dnxhd_encode_picture(), dnxhd_encode_rdo(), dnxhd_find_qscale(), encode_frame(), ff_vp56_decode_frame(), thread_init(), and vp8_decode_frame().

void* AVCodecContext::thread_opaque

thread opaque Can be used by execute() to store some per AVCodecContext stuff.

• encoding: set by execute()
• decoding: set by execute()

Definition at line 3033 of file avcodec.h.

Referenced by avcodec_close(), avcodec_copy_context(), avcodec_open2(), avcodec_thread_execute(), avcodec_thread_execute2(), ff_thread_await_progress(), ff_thread_can_start_frame(), ff_thread_decode_frame(), ff_thread_finish_setup(), ff_thread_flush(), ff_thread_get_buffer(), ff_thread_init(), ff_thread_release_buffer(), ff_thread_report_progress(), frame_thread_free(), frame_thread_init(), free_progress(), thread_free(), thread_init(), and worker().

int AVCodecContext::nsse_weight

noise vs.

sse weight for the nsse comparsion function

• encoding: Set by user.
• decoding: unused

Definition at line 3040 of file avcodec.h.

Referenced by add_codec(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), nsse16_c(), and nsse8_c().

int AVCodecContext::profile

profile

• encoding: Set by user.
• decoding: Set by libavcodec.

Definition at line 3047 of file avcodec.h.

Referenced by aac_encode_init(), aacPlus_encode_init(), avcodec_string(), avpriv_dirac_parse_sequence_header(), dca_decode_frame(), decode_slice_header(), encode_init(), encode_slice(), Faac_encode_init(), mpeg1_encode_sequence_header(), mpeg4_decode_profile_level(), mpeg4_encode_visual_object_header(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), mxf_get_mpeg2_codec_ul(), mxf_parse_mpeg2_frame(), mxf_write_mpegvideo_desc(), parse_nal_units(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), show_stream(), update_context_from_thread(), vc1_decode_init(), vpx_init(), and X264_init().

int AVCodecContext::level

level

• encoding: Set by user.
• decoding: Set by libavcodec.

Definition at line 3117 of file avcodec.h.

Referenced by avpriv_dirac_parse_sequence_header(), decode_slice_header(), encode_init(), mpeg1_encode_sequence_header(), mpeg4_decode_profile_level(), mpeg4_encode_visual_object_header(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), mxf_get_mpeg2_codec_ul(), mxf_parse_mpeg2_frame(), mxf_write_mpegvideo_desc(), parse_nal_units(), show_stream(), update_context_from_thread(), vc1_decode_init(), X264_init(), and XAVS_init().

enum AVDiscard AVCodecContext::skip_loop_filter

• encoding: unused
• decoding: Set by user.

Definition at line 3125 of file avcodec.h.

Referenced by decode_slice_header(), decode_wmv9(), ff_vc1_decode_entry_point(), ff_vc1_decode_sequence_header(), stream_component_open(), vc1_decode_p_blocks(), and vp8_decode_frame().

enum AVDiscard AVCodecContext::skip_idct

• encoding: unused
• decoding: Set by user.

Definition at line 3132 of file avcodec.h.

Referenced by MPV_decode_mb_internal(), and stream_component_open().

enum AVDiscard AVCodecContext::skip_frame

• encoding: unused
• decoding: Set by user.

Definition at line 3139 of file avcodec.h.

Referenced by decode_chunks(), decode_frame(), decode_nal_units(), ff_h263_decode_frame(), ff_rv34_decode_frame(), h261_decode_frame(), stream_component_open(), svq1_decode_frame(), svq3_decode_frame(), vc1_decode_frame(), and vp8_decode_frame().

uint8_t* AVCodecContext::subtitle_header

Header containing style information for text subtitles.

For SUBTITLE_ASS subtitle type, it should contain the whole ASS [Script Info] and [V4+ Styles] section, plus the [Events] line and the Format line following. It shouldn't include any Dialogue line.

• encoding: Set/allocated/freed by user (before avcodec_open2())
• decoding: Set/allocated/freed by libavcodec (by avcodec_open2())

Definition at line 3149 of file avcodec.h.

Referenced by ass_decode_init(), ass_encode_init(), avcodec_open2(), ff_ass_subtitle_header(), ff_free_stream(), mov_text_encode_init(), srt_encode_init(), transcode(), and transcode_init().

int AVCodecContext::subtitle_header_size

Definition at line 3150 of file avcodec.h.

Referenced by ass_decode_init(), ass_encode_init(), ff_ass_subtitle_header(), and transcode_init().

int AVCodecContext::error_rate

Simulates errors in the bitstream to test error concealment.

• encoding: Set by user.
• decoding: unused

Definition at line 3157 of file avcodec.h.

Referenced by encode_thread().

AVPacket* AVCodecContext::pkt

Current packet as passed into the decoder, to avoid having to pass the packet into every function.

Currently only valid inside lavc and get/release_buffer callbacks.

• decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
• encoding: unused

Definition at line 3166 of file avcodec.h.

Referenced by add_metadata_from_side_data(), avcodec_decode_audio4(), avcodec_decode_subtitle2(), avcodec_decode_video2(), decode(), ff_init_buffer_info(), frame_thread_init(), and raw_decode().

uint64_t AVCodecContext::vbv_delay

VBV delay coded in the last frame (in periods of a 27 MHz clock).

Used for compliant TS muxing.

• encoding: Set by libavcodec.
• decoding: unused.

Definition at line 3174 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

AVRational AVCodecContext::pkt_timebase

Timebase in which pkt_dts/pts and AVPacket.dts/pts are.

Code outside libavcodec should access this field using: av_codec_{get,set}_pkt_timebase(avctx)

• encoding unused.
• decodimg set by user

Definition at line 3183 of file avcodec.h.

Referenced by avcodec_decode_audio4(), avcodec_decode_subtitle2(), and decode_frame().

const AVCodecDescriptor* AVCodecContext::codec_descriptor

AVCodecDescriptor Code outside libavcodec should access this field using: av_codec_{get,set}_codec_descriptor(avctx)

• encoding: unused.
• decoding: set by libavcodec.

Definition at line 3192 of file avcodec.h.

Referenced by avcodec_decode_subtitle2(), and avcodec_open2().

int64_t AVCodecContext::pts_correction_num_faulty_pts

Current statistics for PTS correction.

• decoding: maintained and used by libavcodec, not intended to be used by user apps
• encoding: unused

Definition at line 3199 of file avcodec.h.

Referenced by avcodec_open2(), guess_correct_pts(), and video_refresh().

int64_t AVCodecContext::pts_correction_num_faulty_dts

Number of incorrect PTS values so far.

Definition at line 3200 of file avcodec.h.

Referenced by avcodec_open2(), guess_correct_pts(), and video_refresh().

int64_t AVCodecContext::pts_correction_last_pts

Number of incorrect DTS values so far.

Definition at line 3201 of file avcodec.h.

Referenced by avcodec_flush_buffers(), avcodec_open2(), and guess_correct_pts().

int64_t AVCodecContext::pts_correction_last_dts

PTS of the last frame.

Definition at line 3202 of file avcodec.h.

Referenced by avcodec_flush_buffers(), avcodec_open2(), and guess_correct_pts().

AVDictionary* AVCodecContext::metadata

DTS of the last frame.

Current frame metadata.

• decoding: maintained and used by libavcodec, not intended to be used by user apps
• encoding: unused

Definition at line 3209 of file avcodec.h.

Referenced by add_metadata_from_side_data(), and avcodec_close().

char* AVCodecContext::sub_charenc

Character encoding of the input subtitles file.

• decoding: set by user
• encoding: unused

Definition at line 3216 of file avcodec.h.

Referenced by avcodec_open2(), and recode_subtitle().

int AVCodecContext::sub_charenc_mode

Subtitles character encoding mode.

Formats or codecs might be adjusting this setting (if they are doing the conversion themselves for instance).

• decoding: set by libavcodec
• encoding: unused

Definition at line 3224 of file avcodec.h.

Referenced by avcodec_open2(), and recode_subtitle().

---

The documentation for this struct was generated from the following file:

• libavcodec/avcodec.h