FFmpeg: doc/examples/demuxing_decoding.c File Reference

Demuxing and decoding example. More...

#include <libavutil/imgutils.h>
#include <libavutil/samplefmt.h>
#include <libavutil/timestamp.h>
#include <libavformat/avformat.h>

Go to the source code of this file.

Enumerations
enum	{ API_MODE_OLD = 0, API_MODE_NEW_API_REF_COUNT = 1, API_MODE_NEW_API_NO_REF_COUNT = 2 }

Functions
static int	decode_packet (int *got_frame, int cached)

static int	open_codec_context (int stream_idx, AVFormatContext fmt_ctx, enum AVMediaType type)

static int	get_format_from_sample_fmt (const char **fmt, enum AVSampleFormat sample_fmt)

int	main (int argc, char **argv)

Variables
static AVFormatContext *	fmt_ctx = NULL

static AVCodecContext *	video_dec_ctx = NULL

static AVCodecContext *	audio_dec_ctx

static AVStream *	video_stream = NULL

static AVStream *	audio_stream = NULL

static const char *	src_filename = NULL

static const char *	video_dst_filename = NULL

static const char *	audio_dst_filename = NULL

static FILE *	video_dst_file = NULL

static FILE *	audio_dst_file = NULL

static uint8_t *	video_dst_data [4] = {NULL}

static int	video_dst_linesize [4]

static int	video_dst_bufsize

static int	video_stream_idx = -1

static int	audio_stream_idx = -1

static AVFrame *	frame = NULL

static AVPacket	pkt

static int	video_frame_count = 0

static int	audio_frame_count = 0

static int	api_mode = API_MODE_OLD

Detailed Description

Demuxing and decoding example.

Show how to use the libavformat and libavcodec API to demux and decode audio and video data.

Definition in file demuxing_decoding.c.

Enumeration Type Documentation

anonymous enum

Enumerator:

API_MODE_OLD
API_MODE_NEW_API_REF_COUNT
API_MODE_NEW_API_NO_REF_COUNT

Definition at line 60 of file demuxing_decoding.c.

Function Documentation

static int decode_packet	(	int *	got_frame,
		int	cached
	)

static

Examples:: demuxing_decoding.c.

Definition at line 68 of file demuxing_decoding.c.

Referenced by main().

static int open_codec_context	(	int *	stream_idx,
		AVFormatContext *	fmt_ctx,
		enum AVMediaType	type
	)

static

Examples:: demuxing_decoding.c.

Definition at line 138 of file demuxing_decoding.c.

Referenced by main().

static int get_format_from_sample_fmt	(	const char **	fmt,
		enum AVSampleFormat	sample_fmt
	)

static

Examples:: demuxing_decoding.c, and resampling_audio.c.

Definition at line 178 of file demuxing_decoding.c.

Referenced by main().

int main	(	int	argc,
		char **	argv
	)

Definition at line 207 of file demuxing_decoding.c.

Variable Documentation

AVFormatContext* fmt_ctx = NULL

static

Examples:: avio_reading.c, demuxing_decoding.c, filtering_audio.c, filtering_video.c, metadata.c, muxing.c, and remuxing.c.

Definition at line 37 of file demuxing_decoding.c.

Referenced by close_input_file(), main(), open_input_file(), and probe_file().

AVCodecContext* video_dec_ctx = NULL

static

Examples:: demuxing_decoding.c.

Definition at line 38 of file demuxing_decoding.c.

AVCodecContext * audio_dec_ctx

static

Examples:: demuxing_decoding.c.

Definition at line 38 of file demuxing_decoding.c.

Referenced by decode_packet(), and main().

AVStream* video_stream = NULL

static

Examples:: demuxing_decoding.c.

Definition at line 39 of file demuxing_decoding.c.

Referenced by yop_read_header().

AVStream * audio_stream = NULL

static

Examples:: demuxing_decoding.c.

Definition at line 39 of file demuxing_decoding.c.

Referenced by main(), and yop_read_header().

const char* src_filename = NULL

static

Examples:: demuxing_decoding.c.

Definition at line 40 of file demuxing_decoding.c.

Referenced by main(), and open_codec_context().

const char* video_dst_filename = NULL

static

Examples:: demuxing_decoding.c.

Definition at line 41 of file demuxing_decoding.c.

Referenced by main().

const char* audio_dst_filename = NULL

static

Examples:: demuxing_decoding.c.

Definition at line 42 of file demuxing_decoding.c.

Referenced by main().

FILE* video_dst_file = NULL

static

Examples:: demuxing_decoding.c.

Definition at line 43 of file demuxing_decoding.c.

Referenced by decode_packet(), and main().

FILE* audio_dst_file = NULL

static

Examples:: demuxing_decoding.c.

Definition at line 44 of file demuxing_decoding.c.

Referenced by decode_packet(), and main().

uint8_t* video_dst_data[4] = {NULL}

static

Examples:: demuxing_decoding.c.

Definition at line 46 of file demuxing_decoding.c.

Referenced by decode_packet(), and main().

int video_dst_linesize[4]

static

Examples:: demuxing_decoding.c.

Definition at line 47 of file demuxing_decoding.c.

Referenced by decode_packet(), and main().

int video_dst_bufsize

static

Examples:: demuxing_decoding.c.

Definition at line 48 of file demuxing_decoding.c.

Referenced by decode_packet(), and main().

int video_stream_idx = -1

static

Examples:: demuxing_decoding.c.

Definition at line 50 of file demuxing_decoding.c.

Referenced by decode_packet(), and main().

int audio_stream_idx = -1

static

Examples:: demuxing_decoding.c.

Definition at line 50 of file demuxing_decoding.c.

Referenced by decode_packet(), and main().

AVFrame* frame = NULL

static

Examples:: avcodec.c, demuxing_decoding.c, filter_audio.c, filtering_audio.c, filtering_video.c, muxing.c, and transcode_aac.c.

Definition at line 51 of file demuxing_decoding.c.

Referenced by a64multi_encode_frame(), ac3_decode_frame(), add_frame(), add_timecode_metadata(), add_to_queue(), adpcm_decode_frame(), adx_decode_frame(), alac_decode_frame(), alloc_frame(), amrnb_decode_frame(), amrwb_decode_frame(), ape_decode_frame(), aqt_probe(), aqt_read_header(), atrac1_decode_frame(), atrac3_decode_frame(), atrac3p_decode_frame(), audio_encode_example(), aura_decode_frame(), av_frame_alloc(), avcodec_encode_audio(), avisynth_read_packet_video(), bfi_decode_frame(), bmv_aud_decode_frame(), brpix_decode_frame(), cdg_decode_frame(), channel_decorrelation(), cinaudio_decode_frame(), cinepak_encode_frame(), cmv_decode_frame(), cng_decode_frame(), compand_drain(), compand_nodelay(), cook_decode_frame(), copy_samples(), cpia_decode_frame(), cyuv_decode_frame(), dca_decode_frame(), decklink_write_video_packet(), decode_bdlt(), decode_bmv_frame(), decode_dds1(), decode_dsw1(), decode_entropy_coded_image(), decode_frame(), decode_tag(), decode_thread(), decode_tsw1(), decode_wdlt(), dfa_decode_frame(), dirac_decode_frame_internal(), dnxhd_decode_frame(), dpcm_decode_frame(), dv_write_packet(), dvvideo_encode_frame(), eightsvx_decode_frame(), encode_frame(), encode_residual_ch(), escape124_decode_frame(), evrc_decode_frame(), fdk_aac_decode_frame(), ff_default_get_audio_buffer(), ff_default_get_video_buffer(), ff_filter_frame_framed(), ff_framesync_get_frame(), ff_h264_fill_mbaff_ref_list(), ff_hevc_frame_rps(), ff_hevc_output_frame(), ff_ivi_decode_frame(), ff_load_image(), ff_mjpeg_decode_frame(), ff_twinvq_decode_frame(), filter_frame(), filter_frame_left(), filter_frame_right(), filter_slice_alpha(), filter_slice_chroma(), filter_slice_luma(), filter_slice_rgb(), flac_decode_frame(), framesync_inject_frame(), g722_decode_frame(), g723_1_decode_frame(), generate_missing_ref(), get_buffer_internal(), get_pts(), get_video_buffer(), gsm_decode_frame(), hnm_decode_frame(), idcin_decode_frame(), ilbc_decode_frame(), imc_decode_frame(), init_frame(), init_slice_rpl(), ipvideo_decode_frame(), ipvideo_decode_opcodes(), join_request_frame(), jpeg2000_decode_frame(), lag_decode_frame(), lavfi_read_packet(), libcelt_dec_decode(), libgsm_decode_frame(), libopenjpeg_decode_frame(), libopus_decode(), libschroedinger_decode_frame(), libspeex_decode_frame(), mace_decode_frame(), main(), microdvd_read_header(), mpc7_decode_frame(), mpc8_decode_frame(), mss2_decode_frame(), mv_read_packet(), mv_read_seek(), mxf_write_system_item(), oggvorbis_decode_frame(), output_frame_end(), pad_last_frame(), paf_aud_decode(), paf_vid_decode(), pcm_bluray_decode_frame(), pcm_decode_frame(), pcm_dvd_decode_frame(), push_frame(), qcelp_decode_frame(), qdm2_decode_frame(), ra144_decode_frame(), ra288_decode_frame(), raw_decode(), CustomSource::read(), read_interval_packets(), request_frame(), rl2_decode_frame(), roq_encode_frame(), s302m_decode_frame(), decklink_callback::ScheduledFrameCompleted(), shorten_decode_frame(), sipr_decode_frame(), smka_decode_frame(), source_request_frame(), Stagefright_close(), Stagefright_decode_frame(), sub2video_get_blank_frame(), sub2video_push_ref(), sub2video_update(), swf_read_packet(), tak_decode_frame(), tgq_decode_frame(), tgv_decode_frame(), tmv_decode_frame(), truespeech_decode_frame(), try_decode_frame(), tta_decode_frame(), uninit(), unpack_frame(), v4l2_read_packet(), vda_h264_end_frame(), video_decode_example(), video_encode_example(), vmd_read_packet(), vmdaudio_decode_frame(), vmdvideo_decode_frame(), vorbis_decode_frame(), vqa_decode_frame(), wavesynth_decode(), wavpack_decode_frame(), wma_decode_superframe(), worker(), write_frame_header(), write_packet(), ws_snd_decode_frame(), xan_decode_frame(), xface_decode_frame(), and yop_decode_frame().

static

Examples:: avcodec.c, demuxing_decoding.c, muxing.c, and remuxing.c.

Definition at line 52 of file demuxing_decoding.c.

Referenced by add_to_pktbuf(), ape_tag_read_field(), asf_read_header(), asf_read_picture(), asf_read_pts(), audio_decode_frame(), audio_encode_example(), audio_write_frame(), av_dup_packet(), av_packet_merge_side_data(), av_write_trailer(), av_write_uncoded_frame_internal(), avcodec_encode_audio(), avcodec_encode_video(), avformat_find_stream_info(), do_audio_out(), do_subtitle_out(), do_video_out(), encode_callback(), encode_frame(), estimate_timings_from_pts(), extract_mpeg4_header(), ff_interleave_add_packet(), ff_load_image(), ff_mpegts_parse_packet(), ff_write_chained(), filter_frame(), filter_packet(), find_missing_packets(), flush_encoders(), flush_packet(), free_pkt_fifo(), gen_buffer_time(), gen_bytes_read(), gen_check_bw(), gen_connect(), gen_create_stream(), gen_delete_stream(), gen_fcpublish_stream(), gen_fcsubscribe_stream(), gen_fcunpublish_stream(), gen_play(), gen_pong(), gen_publish(), gen_release_stream(), gen_seek(), gen_server_bw(), gen_swf_verification(), gxf_compare_field_nb(), http_prepare_data(), ipmovie_read_header(), mace_decode_frame(), main(), matroska_parse_frame(), matroska_parse_webvtt(), mkv_write_packet(), mkv_write_srt_blocks(), mov_create_chapter_track(), mov_create_timecode_track(), mov_read_covr(), movie_push_frame(), mpc_read_seek(), mpegts_get_dts(), mpegts_read_packet(), nsv_read_chunk(), output_packet(), packet_queue_flush(), packet_queue_put_nullpacket(), packet_queue_put_private(), parse_file(), process_callback(), process_input(), queue_frames(), read_connect(), read_interval_packets(), read_thread(), search_hi_lo_keyframes(), seek_frame_generic(), Stagefright_decode_frame(), str_read_packet(), subtitle_thread(), supply_new_packets(), try_decode_frame(), video_encode_example(), video_thread(), vp8_lossy_decode_frame(), wavpack_encode_frame(), worker(), write_audio_frame(), write_frame(), write_video_frame(), and wv_read_seek().

int video_frame_count = 0

static

Examples:: demuxing_decoding.c.

Definition at line 53 of file demuxing_decoding.c.

Referenced by decode_packet().

int audio_frame_count = 0

static

Examples:: demuxing_decoding.c.

Definition at line 54 of file demuxing_decoding.c.

Referenced by decode_packet(), and fourxm_read_packet().

int api_mode = API_MODE_OLD

static

Examples:: demuxing_decoding.c.

Definition at line 66 of file demuxing_decoding.c.

Referenced by decode_packet(), main(), and open_codec_context().