Go to the documentation of this file.
1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
22 #include "config.h"
24 #include <stdint.h>
25 #include <stdio.h>
26 #include <signal.h>
28 #include "cmdutils.h"
30 #include "libavformat/avformat.h"
31 #include "libavformat/avio.h"
33 #include "libavcodec/avcodec.h"
35 #include "libavfilter/avfilter.h"
37 #include "libavutil/avutil.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/eval.h"
40 #include "libavutil/fifo.h"
41 #include "libavutil/hwcontext.h"
42 #include "libavutil/pixfmt.h"
43 #include "libavutil/rational.h"
44 #include "libavutil/thread.h"
49 #define VSYNC_AUTO -1
51 #define VSYNC_CFR 1
52 #define VSYNC_VFR 2
53 #define VSYNC_VSCFR 0xfe
54 #define VSYNC_DROP 0xff
56 #define MAX_STREAMS 1024 /* arbitrary sanity check value */
58 enum HWAccelID {
64 };
66 typedef struct HWAccel {
67  const char *name;
69  enum HWAccelID id;
71 } HWAccel;
73 typedef struct HWDevice {
74  const char *name;
77 } HWDevice;
79 /* select an input stream for an output stream */
80 typedef struct StreamMap {
81  int disabled; /* 1 is this mapping is disabled by a negative map */
86  char *linklabel; /* name of an output link, for mapping lavfi outputs */
87 } StreamMap;
89 typedef struct {
90  int file_idx, stream_idx, channel_idx; // input
91  int ofile_idx, ostream_idx; // output
94 typedef struct OptionsContext {
97  /* input/output options */
98  int64_t start_time;
99  int64_t start_time_eof;
101  const char *format;
116  /* input options */
118  int loop;
119  int rate_emu;
136  /* output options */
139  AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
140  int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
144  const char **attachments;
149  int64_t recording_time;
150  int64_t stop_time;
151  uint64_t limit_filesize;
152  float mux_preload;
154  int shortest;
155  int bitexact;
162  /* indexed by output file stream index */
213  int nb_pass;
221  int nb_apad;
236 typedef struct InputFilter {
238  struct InputStream *ist;
241  enum AVMediaType type; // AVMEDIA_TYPE_SUBTITLE for sub2video
245  // parameters configured for this input
246  int format;
248  int width, height;
252  int channels;
253  uint64_t channel_layout;
257  int eof;
258 } InputFilter;
260 typedef struct OutputFilter {
262  struct OutputStream *ost;
266  /* temporary storage until stream maps are processed */
270  /* desired output stream properties */
271  int width, height;
273  int format;
275  uint64_t channel_layout;
277  // those are only set if no format is specified and the encoder gives us multiple options
278  int *formats;
279  uint64_t *channel_layouts;
281 } OutputFilter;
283 typedef struct FilterGraph {
284  int index;
285  const char *graph_desc;
294 } FilterGraph;
296 typedef struct InputStream {
299  int discard; /* true if stream data should be discarded */
301  int decoding_needed; /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
302 #define DECODING_FOR_OST 1
308  AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
310  int64_t start; /* time when read started */
311  /* predicted dts of the next packet read for this stream or (when there are
312  * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
313  int64_t next_dts;
314  int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
316  int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
317  int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
322  int64_t min_pts; /* pts with the smallest value in a current stream */
323  int64_t max_pts; /* pts with the higher value in a current stream */
325  // when forcing constant input framerate through -r,
326  // this contains the pts that will be given to the next decoded frame
327  int64_t cfr_next_pts;
329  int64_t nb_samples; /* number of samples in the last decoded audio frame before looping */
331  double ts_scale;
334  AVRational framerate; /* framerate forced with -r */
341  struct { /* previous decoded subtitle and related variables */
343  int ret;
345  } prev_sub;
347  struct sub2video {
348  int64_t last_pts;
349  int64_t end_pts;
350  AVFifoBuffer *sub_queue; ///< queue of AVSubtitle* before filter init
352  int w, h;
353  unsigned int initialize; ///< marks if sub2video_update should force an initialization
354  } sub2video;
356  int dr1;
358  /* decoded data from this stream goes into all those filters
359  * currently video and audio only */
365  /* hwaccel options */
366  enum HWAccelID hwaccel_id;
367  enum AVHWDeviceType hwaccel_device_type;
369  enum AVPixelFormat hwaccel_output_format;
371  /* hwaccel context */
372  void *hwaccel_ctx;
374  int (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
376  enum AVPixelFormat hwaccel_pix_fmt;
377  enum AVPixelFormat hwaccel_retrieved_pix_fmt;
380  /* stats */
381  // combined size of all the packets read
382  uint64_t data_size;
383  /* number of packets successfully read for this stream */
384  uint64_t nb_packets;
385  // number of frames/samples retrieved from the decoder
386  uint64_t frames_decoded;
387  uint64_t samples_decoded;
389  int64_t *dts_buffer;
392  int got_output;
393 } InputStream;
395 typedef struct InputFile {
397  int eof_reached; /* true if eof reached */
398  int eagain; /* true if last read attempt returned EAGAIN */
399  int ist_index; /* index of first stream in input_streams */
400  int loop; /* set number of times input stream should be looped */
401  int64_t duration; /* actual duration of the longest stream in a file
402  at the moment when looping happens */
403  AVRational time_base; /* time base of the duration */
406  int64_t ts_offset;
407  int64_t last_ts;
408  int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
410  int64_t recording_time;
411  int nb_streams; /* number of stream that ffmpeg is aware of; may be different
412  from ctx.nb_streams if new streams appear during av_read_frame() */
413  int nb_streams_warn; /* number of streams that the user was warned of */
414  int rate_emu;
418  AVThreadMessageQueue *in_thread_queue;
419  pthread_t thread; /* thread reading from this file */
420  int non_blocking; /* reading packets from the thread should not block */
421  int joined; /* the thread has been joined */
422  int thread_queue_size; /* maximum number of queued packets */
423 #endif
424 } InputFile;
433 };
435 #define ABORT_ON_FLAG_EMPTY_OUTPUT (1 << 0)
438 extern const char *const forced_keyframes_const_names[];
440 typedef enum {
443 } OSTFinished ;
445 typedef struct OutputStream {
446  int file_index; /* file index */
447  int index; /* stream index in the output file */
448  int source_index; /* InputStream index */
449  AVStream *st; /* stream in the output file */
450  int encoding_needed; /* true if encoding needed for this stream */
452  /* input pts and corresponding output pts
453  for A/V sync */
454  struct InputStream *sync_ist; /* input stream to sync against */
455  int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
456  /* pts of the first frame encoded for this stream, used for limiting
457  * recording time */
458  int64_t first_pts;
459  /* dts of the last packet sent to the muxer */
460  int64_t last_mux_dts;
461  // the timebase of the packets sent to the muxer
468  AVCodecParameters *ref_par; /* associated input codec parameters with encoders options applied */
470  int64_t max_frames;
474  int last_nb0_frames[3];
476  void *hwaccel_ctx;
478  /* video only */
480  int is_cfr;
489  /* forced key frames */
491  int64_t *forced_kf_pts;
496  double forced_keyframes_expr_const_values[FKF_NB];
498  /* audio only */
499  int *audio_channels_map; /* list of the channels id to pick from the source stream */
500  int audio_channels_mapped; /* number of channels in audio_channels_map */
503  FILE *logfile;
506  char *avfilter;
507  char *filters; ///< filtergraph associated to the -filter option
508  char *filters_script; ///< filtergraph script associated to the -filter_script option
514  char *apad;
515  OSTFinished finished; /* no more packets should be written for this stream */
516  int unavailable; /* true if the steram is unavailable (possibly temporarily) */
519  // init_output_stream() has been called for this stream
520  // The encoder and the bitstream filters have been initialized and the stream
521  // parameters are set in the AVStream.
526  const char *attachment_filename;
529  char *disposition;
533  /* stats */
534  // combined size of all the packets written
535  uint64_t data_size;
536  // number of packets send to the muxer
537  uint64_t packets_written;
538  // number of frames/samples sent to the encoder
539  uint64_t frames_encoded;
540  uint64_t samples_encoded;
542  /* packet quality factor */
543  int quality;
547  /* the packets are buffered here until the muxer is ready to be initialized */
550  /* packet picture type */
553  /* frame encode sum of squared error values */
554  int64_t error[4];
555 } OutputStream;
557 typedef struct OutputFile {
560  int ost_index; /* index of the first stream in output_streams */
561  int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
562  int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
563  uint64_t limit_filesize; /* filesize limit expressed in bytes */
565  int shortest;
568 } OutputFile;
570 extern InputStream **input_streams;
571 extern int nb_input_streams;
572 extern InputFile **input_files;
573 extern int nb_input_files;
576 extern int nb_output_streams;
577 extern OutputFile **output_files;
578 extern int nb_output_files;
580 extern FilterGraph **filtergraphs;
581 extern int nb_filtergraphs;
583 extern char *vstats_filename;
584 extern char *sdp_filename;
586 extern float audio_drift_threshold;
587 extern float dts_delta_threshold;
588 extern float dts_error_threshold;
590 extern int audio_volume;
591 extern int audio_sync_method;
592 extern int video_sync_method;
593 extern float frame_drop_threshold;
594 extern int do_benchmark;
595 extern int do_benchmark_all;
596 extern int do_deinterlace;
597 extern int do_hex_dump;
598 extern int do_pkt_dump;
599 extern int copy_ts;
600 extern int start_at_zero;
601 extern int copy_tb;
602 extern int debug_ts;
603 extern int exit_on_error;
604 extern int abort_on_flags;
605 extern int print_stats;
606 extern int qp_hist;
607 extern int stdin_interaction;
608 extern int frame_bits_per_raw_sample;
609 extern AVIOContext *progress_avio;
610 extern float max_error_rate;
611 extern char *videotoolbox_pixfmt;
613 extern int filter_nbthreads;
614 extern int filter_complex_nbthreads;
615 extern int vstats_version;
617 extern const AVIOInterruptCB int_cb;
619 extern const OptionDef options[];
620 extern const HWAccel hwaccels[];
621 #if CONFIG_QSV
622 extern char *qsv_device;
623 #endif
624 extern HWDevice *filter_hw_device;
627 void term_init(void);
628 void term_exit(void);
630 void reset_options(OptionsContext *o, int is_input);
631 void show_usage(void);
633 void opt_output_file(void *optctx, const char *filename);
640 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, AVCodec *codec, enum AVPixelFormat target);
641 void choose_sample_fmt(AVStream *st, AVCodec *codec);
645 void check_filter_outputs(void);
651 void sub2video_update(InputStream *ist, int64_t heartbeat_pts, AVSubtitle *sub);
655 int ffmpeg_parse_options(int argc, char **argv);
660 HWDevice *hw_device_get_by_name(const char *name);
661 int hw_device_init_from_string(const char *arg, HWDevice **dev);
662 void hw_device_free_all(void);
670 #endif /* FFTOOLS_FFMPEG_H */
int64_t pts
current pts of the decoded frame (in AV_TIME_BASE units)
Definition: ffmpeg.h:317
SpecifierOpt * passlogfiles
Definition: ffmpeg.h:214
AVRational enc_timebase
Definition: ffmpeg.h:463
int nb_dump_attachment
Definition: ffmpeg.h:126
int got_output
Definition: ffmpeg.h:342
int nb_metadata
Definition: ffmpeg.h:167
int nb_streamid_map
Definition: ffmpeg.h:164
int frame_number
Definition: ffmpeg.h:451
int width
Definition: ffmpeg.h:271
Definition: ffmpeg.h:427
int keep_pix_fmt
Definition: ffmpeg.h:531
Bytestream IO Context.
Definition: avio.h:161
float mux_preload
Definition: ffmpeg.h:152
int64_t recording_time
desired length of the resulting file in microseconds == AV_TIME_BASE units
Definition: ffmpeg.h:561
Definition: ffmpeg.h:58
Buffered I/O operations.
uint8_t * name
Definition: ffmpeg.h:264
int nb_outputs
Definition: ffmpeg.h:293
char * qsv_device
Definition: ffmpeg_qsv.c:32
AVDictionary * swr_opts
Definition: ffmpeg.h:512
enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, AVCodec *codec, enum AVPixelFormat target)
Definition: ffmpeg_filter.c:63
This structure describes decoded (raw) audio or video data.
Definition: frame.h:308
int stream_copy
Definition: ffmpeg.h:517
AVRational frame_rate
Definition: ffmpeg.h:479
int64_t * forced_kf_pts
Definition: ffmpeg.h:491
int64_t start_time_eof
Definition: ffmpeg.h:99
AVBufferRef * hw_frames_ctx
Definition: ffmpeg.h:378
char * filters
filtergraph associated to the -filter option
Definition: ffmpeg.h:507
SpecifierOpt * hwaccel_output_formats
Definition: ffmpeg.h:131
HWDevice * filter_hw_device
Definition: ffmpeg_opt.c:143
int data_disable
Definition: ffmpeg.h:160
float mux_max_delay
Definition: ffmpeg.h:153
int exit_on_error
Definition: ffmpeg_opt.c:165
int64_t cfr_next_pts
Definition: ffmpeg.h:327
int accurate_seek
Definition: ffmpeg.h:415
OutputFile ** output_files
Definition: ffmpeg.c:154
int64_t forced_kf_ref_pts
Definition: ffmpeg.h:490
int nb_forced_key_frames
Definition: ffmpeg.h:179
int * streamid_map
Definition: ffmpeg.h:163
Main libavfilter public API header.
int nb_stream_maps
Definition: ffmpeg.h:138
SpecifierOpt * copy_initial_nonkeyframes
Definition: ffmpeg.h:198
int ostream_idx
Definition: ffmpeg.h:91
int nb_chroma_intra_matrices
Definition: ffmpeg.h:191
AVRational framerate
Definition: ffmpeg.h:334
void choose_sample_fmt(AVStream *st, AVCodec *codec)
Definition: ffmpeg_filter.c:93
SpecifierOpt * reinit_filters
Definition: ffmpeg.h:206
SpecifierOpt * ts_scale
Definition: ffmpeg.h:123
int64_t max_pts
Definition: ffmpeg.h:323
AVFilterInOut * out_tmp
Definition: ffmpeg.h:267
int bitexact
Definition: ffmpeg.h:155
int decoding_needed
Definition: ffmpeg.h:301
int nb_canvas_sizes
Definition: ffmpeg.h:211
The bitstream filter state.
Definition: bsf.h:49
int rotate_overridden
Definition: ffmpeg.h:483
int max_muxing_queue_size
Definition: ffmpeg.h:545
SpecifierOpt * discard
Definition: ffmpeg.h:222
int nb_frame_pix_fmts
Definition: ffmpeg.h:114
void * hwaccel_ctx
Definition: ffmpeg.h:476
SpecifierOpt * sample_fmts
Definition: ffmpeg.h:174
SpecifierOpt * guess_layout_max
Definition: ffmpeg.h:218
void hw_device_free_all(void)
Definition: ffmpeg_hw.c:274
int eagain
Definition: ffmpeg.h:398
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
Convenience header that includes libavutil&#39;s core.
Definition: ffmpeg.h:426
GLint GLenum type
Definition: opengl_enc.c:104
int quality
Definition: ffmpeg.h:543
AVFrame * filter_frame
Definition: ffmpeg.h:308
int do_benchmark_all
Definition: ffmpeg_opt.c:158
int nb_program
Definition: ffmpeg.h:227
int last_dropped
Definition: ffmpeg.h:473
FilterGraph ** filtergraphs
Definition: ffmpeg.c:157
int64_t input_ts_offset
Definition: ffmpeg.h:404
int do_hex_dump
Definition: ffmpeg_opt.c:159
int nb_filter_scripts
Definition: ffmpeg.h:205
static void error(const char *err)
const char * name
Definition: ffmpeg.h:67
uint64_t packets_written
Definition: ffmpeg.h:537
Definition: codec.h:190
int nb_dts_buffer
Definition: ffmpeg.h:390
SpecifierOpt * filters
Definition: ffmpeg.h:202
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
int print_stats
Definition: ffmpeg_opt.c:167
float dts_error_threshold
Definition: ffmpeg_opt.c:150
int64_t start_time
start time in microseconds == AV_TIME_BASE units
Definition: ffmpeg.h:562
int index
Definition: ffmpeg.h:284
uint64_t data_size
Definition: ffmpeg.h:535
SpecifierOpt * qscale
Definition: ffmpeg.h:176
SpecifierOpt * frame_pix_fmts
Definition: ffmpeg.h:113
SpecifierOpt * chroma_intra_matrices
Definition: ffmpeg.h:190
struct FilterGraph * graph
Definition: ffmpeg.h:239
SpecifierOpt * intra_matrices
Definition: ffmpeg.h:186
int encoding_needed
Definition: ffmpeg.h:450
Format I/O context.
Definition: avformat.h:1351
void remove_avoptions(AVDictionary **a, AVDictionary *b)
Definition: ffmpeg.c:648
uint64_t samples_decoded
Definition: ffmpeg.h:387
struct InputStream * ist
Definition: ffmpeg.h:238
enum HWAccelID id
Definition: ffmpeg.h:69
uint64_t frames_decoded
Definition: ffmpeg.h:386
int header_written
Definition: ffmpeg.h:567
AVFilterGraph * graph
Definition: ffmpeg.h:287
Public dictionary API.
char * logfile_prefix
Definition: ffmpeg.h:502
int user_set_discard
Definition: ffmpeg.h:300
int copy_initial_nonkeyframes
Definition: ffmpeg.h:527
int64_t * dts_buffer
Definition: ffmpeg.h:389
AVDictionary * sws_dict
Definition: ffmpeg.h:511
int nb_time_bases
Definition: ffmpeg.h:229
int stdin_interaction
Definition: ffmpeg_opt.c:169
FILE * logfile
Definition: ffmpeg.h:503
AVDictionary * opts
Definition: ffmpeg.h:559
Definition: eval.c:157
int do_benchmark
Definition: ffmpeg_opt.c:157
int audio_sync_method
Definition: ffmpeg_opt.c:153
int nb_max_frames
Definition: ffmpeg.h:169
int shortest
Definition: ffmpeg.h:565
int nb_output_streams
Definition: ffmpeg.c:153
#define height
void sub2video_update(InputStream *ist, int64_t heartbeat_pts, AVSubtitle *sub)
Definition: ffmpeg.c:240
int nb_streams
Definition: ffmpeg.h:411
int sync_file_index
Definition: ffmpeg.h:84
AVDictionary * resample_opts
Definition: ffmpeg.h:513
int seek_timestamp
Definition: ffmpeg.h:100
void reset_options(OptionsContext *o, int is_input)
AVFilterContext * filter
Definition: ffmpeg.h:261
int * formats
Definition: ffmpeg.h:278
SpecifierOpt * bitstream_filters
Definition: ffmpeg.h:170
int init_complex_filtergraph(FilterGraph *fg)
AVCodec * dec
Definition: ffmpeg.h:306
int top_field_first
Definition: ffmpeg.h:335
int file_index
Definition: ffmpeg.h:297
int64_t filter_in_rescale_delta_last
Definition: ffmpeg.h:320
int wrap_correction_done
Definition: ffmpeg.h:318
int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
int filter_complex_nbthreads
Definition: ffmpeg_opt.c:173
SpecifierOpt * disposition
Definition: ffmpeg.h:224
int64_t next_dts
Definition: ffmpeg.h:313
unsigned int initialize
marks if sub2video_update should force an initialization
Definition: ffmpeg.h:353
SpecifierOpt * enc_time_bases
Definition: ffmpeg.h:230
uint64_t channel_layout
Definition: ffmpeg.h:275
AVFifoBuffer * sub_queue
queue of AVSubtitle* before filter init
Definition: ffmpeg.h:350
Callback for checking whether to abort blocking functions.
Definition: avio.h:58
libswresample public header
int nb_top_field_first
Definition: ffmpeg.h:193
int hw_device_setup_for_filter(FilterGraph *fg)
Definition: ffmpeg_hw.c:525
AVRational sample_aspect_ratio
Definition: ffmpeg.h:249
int rate_emu
Definition: ffmpeg.h:414
int nb_discard
Definition: ffmpeg.h:223
int sample_rate
Definition: ffmpeg.h:251
void check_filter_outputs(void)
int ffmpeg_parse_options(int argc, char **argv)
Definition: ffmpeg_opt.c:3316
AVFilterContext * filter
Definition: ffmpeg.h:237
int nb_filters
Definition: ffmpeg.h:203
int64_t start_time
Definition: ffmpeg.h:98
int64_t start
Definition: ffmpeg.h:310
int loop
Definition: ffmpeg.h:400
uint64_t nb_packets
Definition: ffmpeg.h:384
int seek_timestamp
Definition: ffmpeg.h:409
int64_t last_mux_dts
Definition: ffmpeg.h:460
int video_sync_method
Definition: ffmpeg_opt.c:154
int format
Definition: ffmpeg.h:246
char * sdp_filename
Definition: ffmpeg_opt.c:146
SpecifierOpt * apad
Definition: ffmpeg.h:220
int dr1
Definition: ffmpeg.h:356
int nb_hwaccel_devices
Definition: ffmpeg.h:130
AudioChannelMap * audio_channel_maps
Definition: ffmpeg.h:139
int nb_disposition
Definition: ffmpeg.h:225
const char * arg
Definition: jacosubdec.c:66
SpecifierOpt * codec_tags
Definition: ffmpeg.h:172
SpecifierOpt * rc_overrides
Definition: ffmpeg.h:184
int video_disable
Definition: ffmpeg.h:157
int eof
Definition: ffmpeg.h:257
int nb_input_files
Definition: ffmpeg.c:150
int force_fps
Definition: ffmpeg.h:481
int hw_device_setup_for_encode(OutputStream *ost)
Definition: ffmpeg_hw.c:419
int nb_codec_names
Definition: ffmpeg.h:104
int qp_hist
Definition: ffmpeg_opt.c:168
StreamMap * stream_maps
Definition: ffmpeg.h:137
float frame_drop_threshold
Definition: ffmpeg_opt.c:155
uint64_t limit_filesize
Definition: ffmpeg.h:151
const char * format
Definition: ffmpeg.h:101
int nb_passlogfiles
Definition: ffmpeg.h:215
int filter_nbthreads
Definition: ffmpeg_opt.c:172
int nb_force_fps
Definition: ffmpeg.h:181
OutputFilter * filter
Definition: ffmpeg.h:505
const char * name
Definition: ffmpeg.h:74
AVRational frame_aspect_ratio
Definition: ffmpeg.h:487
int nb_sample_fmts
Definition: ffmpeg.h:175
int file_index
Definition: ffmpeg.h:82
int nb_audio_channel_maps
Definition: ffmpeg.h:140
AVRational mux_timebase
Definition: ffmpeg.h:462
SpecifierOpt * filter_scripts
Definition: ffmpeg.h:204
int nb_attachments
Definition: ffmpeg.h:145
char * linklabel
Definition: ffmpeg.h:86
#define b
Definition: input.c:41
int nb_hwaccel_output_formats
Definition: ffmpeg.h:132
int nb_ts_scale
Definition: ffmpeg.h:124
int is_cfr
Definition: ffmpeg.h:480
SpecifierOpt * audio_channels
Definition: ffmpeg.h:105
uint64_t * channel_layouts
Definition: ffmpeg.h:279
int saw_first_ts
Definition: ffmpeg.h:332
int nb_audio_sample_rate
Definition: ffmpeg.h:108
int abort_on_flags
Definition: ffmpeg_opt.c:166
SpecifierOpt * time_bases
Definition: ffmpeg.h:228
int metadata_chapters_manual
Definition: ffmpeg.h:143
struct OutputStream * ost
Definition: ffmpeg.h:262
int accurate_seek
Definition: ffmpeg.h:120
char * apad
Definition: ffmpeg.h:514
SpecifierOpt * pass
Definition: ffmpeg.h:212
int64_t nb_samples
Definition: ffmpeg.h:329
SpecifierOpt * audio_sample_rate
Definition: ffmpeg.h:107
int hw_device_setup_for_decode(InputStream *ist)
Definition: ffmpeg_hw.c:303
int64_t duration
Definition: ffmpeg.h:401
void opt_output_file(void *optctx, const char *filename)
int width
Definition: ffmpeg.h:248
int nb_autoscale
Definition: ffmpeg.h:233
int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
SpecifierOpt * dump_attachment
Definition: ffmpeg.h:125
void assert_avoptions(AVDictionary *m)
Definition: ffmpeg.c:657
SpecifierOpt * canvas_sizes
Definition: ffmpeg.h:210
int nb_codec_tags
Definition: ffmpeg.h:173
int qsv_init(AVCodecContext *s)
Definition: ffmpeg_qsv.c:72
int64_t last_ts
Definition: ffmpeg.h:407
SpecifierOpt * metadata_map
Definition: ffmpeg.h:194
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define s(width, name)
Definition: cbs_vp9.c:257
int do_pkt_dump
Definition: ffmpeg_opt.c:160
int64_t max_frames
Definition: ffmpeg.h:470
int audio_channels_mapped
Definition: ffmpeg.h:500
SpecifierOpt * copy_prior_start
Definition: ffmpeg.h:200
SpecifierOpt * frame_aspect_ratios
Definition: ffmpeg.h:182
SpecifierOpt * frame_sizes
Definition: ffmpeg.h:111
int stream_idx
Definition: ffmpeg.h:90
int sample_rate
Definition: ffmpeg.h:274
int nb_hwaccels
Definition: ffmpeg.h:128
int inputs_done
Definition: ffmpeg.h:524
int vstats_version
Definition: ffmpeg_opt.c:174
HWDevice * hw_device_get_by_name(const char *name)
Definition: ffmpeg_hw.c:44
int start_at_zero
Definition: ffmpeg_opt.c:162
int ret
Definition: ffmpeg.h:343
int audio_volume
Definition: ffmpeg_opt.c:152
Stream structure.
Definition: avformat.h:876
A linked-list of the inputs/outputs of the filter chain.
Definition: avfilter.h:1003
InputFilter ** filters
Definition: ffmpeg.h:360
int fix_sub_duration
Definition: ffmpeg.h:340
int64_t recording_time
Definition: ffmpeg.h:410
SpecifierOpt * hwaccels
Definition: ffmpeg.h:127
SpecifierOpt * autoscale
Definition: ffmpeg.h:232
Definition: ffmpeg.h:66
int(* init)(AVCodecContext *s)
Definition: ffmpeg.h:68
SpecifierOpt * frame_rates
Definition: ffmpeg.h:109
AVStream * st
Definition: ffmpeg.h:298
int nb_presets
Definition: ffmpeg.h:197
int ost_index
Definition: ffmpeg.h:560
struct InputStream * sync_ist
Definition: ffmpeg.h:454
Libavcodec external API header.
double ts_scale
Definition: ffmpeg.h:331
int64_t recording_time
Definition: ffmpeg.h:149
int unavailable
Definition: ffmpeg.h:516
void term_exit(void)
Definition: ffmpeg.c:336
int chapters_input_file
Definition: ffmpeg.h:147
int64_t stop_time
Definition: ffmpeg.h:150
float max_error_rate
Definition: ffmpeg_opt.c:171
uint64_t frames_encoded
Definition: ffmpeg.h:539
int nb_copy_prior_start
Definition: ffmpeg.h:201
AVFifoBuffer * muxing_queue
Definition: ffmpeg.h:548
OutputStream ** output_streams
Definition: ffmpeg.c:152
int ist_index
Definition: ffmpeg.h:399
const char * graph_desc
Definition: ffmpeg.h:285
int guess_layout_max
Definition: ffmpeg.h:336
int64_t start_time
Definition: ffmpeg.h:408
main external API structure.
Definition: avcodec.h:526
InputFile ** input_files
Definition: ffmpeg.c:149
int rate_emu
Definition: ffmpeg.h:119
int * sample_rates
Definition: ffmpeg.h:280
int metadata_streams_manual
Definition: ffmpeg.h:142
const char * attachment_filename
Definition: ffmpeg.h:526
int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
a very simple circular buffer FIFO implementation
AVRational time_base
Definition: ffmpeg.h:403
AVCodecContext * enc_ctx
Definition: ffmpeg.h:467
int audio_disable
Definition: ffmpeg.h:158
int64_t input_ts_offset
Definition: ffmpeg.h:117
int nb_filtergraphs
Definition: ffmpeg.c:158
AVFrame * decoded_frame
Definition: ffmpeg.h:307
AVBufferRef * hw_frames_ctx
Definition: ffmpeg.h:255
int nb_bitstream_filters
Definition: ffmpeg.h:171
SpecifierOpt * top_field_first
Definition: ffmpeg.h:192
int channels
Definition: ffmpeg.h:252
int * audio_channels_map
Definition: ffmpeg.h:499
int configure_filtergraph(FilterGraph *fg)
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int file_index
Definition: ffmpeg.h:446
int metadata_global_manual
Definition: ffmpeg.h:141
double rotate_override_value
Definition: ffmpeg.h:485
int64_t sync_opts
Definition: ffmpeg.h:455
char * vstats_filename
Definition: ffmpeg_opt.c:145
AVCodecContext * dec_ctx
Definition: ffmpeg.h:305
SpecifierOpt * force_fps
Definition: ffmpeg.h:180
char * disposition
Definition: ffmpeg.h:529
int filtergraph_is_simple(FilterGraph *fg)
Definition: avutil.h:199
int nb_fix_sub_duration
Definition: ffmpeg.h:209
int nb_inter_matrices
Definition: ffmpeg.h:189
int nb_streams_warn
Definition: ffmpeg.h:413
AVDictionary * decoder_opts
Definition: ffmpeg.h:333
int shortest
Definition: ffmpeg.h:154
int autorotate
Definition: ffmpeg.h:338
int frame_bits_per_raw_sample
Definition: ffmpeg_opt.c:170
int64_t ts_offset
Definition: ffmpeg.h:406
int nb_qscale
Definition: ffmpeg.h:177
char * filters_script
filtergraph script associated to the -filter_script option
Definition: ffmpeg.h:508
int nb_enc_time_bases
Definition: ffmpeg.h:231
SpecifierOpt * hwaccel_devices
Definition: ffmpeg.h:129
int nb_input_streams
Definition: ffmpeg.c:148
float audio_drift_threshold
Definition: ffmpeg_opt.c:148
AVFrame * filtered_frame
Definition: ffmpeg.h:471
int nb_autorotate
Definition: ffmpeg.h:134
int nb_audio_channels
Definition: ffmpeg.h:106
int source_index
Definition: ffmpeg.h:448
InputStream ** input_streams
Definition: ffmpeg.c:147
int copy_prior_start
Definition: ffmpeg.h:528
SpecifierOpt * metadata
Definition: ffmpeg.h:166
AVIOContext * progress_avio
Definition: ffmpeg.c:143
#define flags(name, subs,...)
Definition: cbs_av1.c:560
int nb_filters
Definition: ffmpeg.h:361
int autoscale
Definition: ffmpeg.h:484
AVExpr * forced_keyframes_pexpr
Definition: ffmpeg.h:495
static int hwaccel_retrieve_data(AVCodecContext *avctx, AVFrame *input)
Definition: ffmpeg_hw.c:474
int64_t dts
dts of the last packet read for this stream (in AV_TIME_BASE units)
Definition: ffmpeg.h:314
int forced_kf_count
Definition: ffmpeg.h:492
int nb_intra_matrices
Definition: ffmpeg.h:187
OSTFinished finished
Definition: ffmpeg.h:515
char * forced_keyframes
Definition: ffmpeg.h:494
int nb_frame_rates
Definition: ffmpeg.h:110
uint64_t data_size
Definition: ffmpeg.h:382
const AVIOInterruptCB int_cb
Definition: ffmpeg.c:489
A reference to a data buffer.
Definition: buffer.h:81
int64_t next_pts
synthetic pts for the next decode frame (in AV_TIME_BASE units)
Definition: ffmpeg.h:316
static AVStream * ost
Main libavformat public API header.
SpecifierOpt * max_muxing_queue_size
Definition: ffmpeg.h:216
int reconfiguration
Definition: ffmpeg.h:288
struct FilterGraph * graph
Definition: ffmpeg.h:263
uint64_t limit_filesize
Definition: ffmpeg.h:563
const OptionDef options[]
Definition: ffmpeg_opt.c:3392
SpecifierOpt * presets
Definition: ffmpeg.h:196
SpecifierOpt * program
Definition: ffmpeg.h:226
int reinit_filters
Definition: ffmpeg.h:363
int nb_frame_sizes
Definition: ffmpeg.h:112
AVCodecParameters * ref_par
Definition: ffmpeg.h:468
Utilties for rational number calculation.
OptionGroup * g
Definition: ffmpeg.h:95
SpecifierOpt * inter_matrices
Definition: ffmpeg.h:188
const char *const forced_keyframes_const_names[]
Definition: ffmpeg.c:114
AVBufferRef * device_ref
Definition: ffmpeg.h:76
SpecifierOpt * forced_key_frames
Definition: ffmpeg.h:178
uint64_t samples_encoded
Definition: ffmpeg.h:540
const char ** attachments
Definition: ffmpeg.h:144
int nb_max_muxing_queue_size
Definition: ffmpeg.h:217
AVFrame * last_frame
Definition: ffmpeg.h:472
uint64_t channel_layout
Definition: ffmpeg.h:253
AVBSFContext * bsf_ctx
Definition: ffmpeg.h:465
int copy_ts
Definition: ffmpeg_opt.c:161
AVFormatContext * ctx
Definition: ffmpeg.h:396
int pict_type
Definition: ffmpeg.h:551
int stream_index
Definition: ffmpeg.h:83
AVCodec * enc
Definition: ffmpeg.h:469
AVSubtitle subtitle
Definition: ffmpeg.h:344
enum AVPixelFormat pix_fmt
Definition: ffmpeg.h:70
int eof_reached
Definition: ffmpeg.h:397
int nb_metadata_map
Definition: ffmpeg.h:195
int forced_kf_index
Definition: ffmpeg.h:493
int nb_rc_overrides
Definition: ffmpeg.h:185
int do_deinterlace
Definition: ffmpeg_opt.c:156
SpecifierOpt * fix_sub_duration
Definition: ffmpeg.h:208
Definition: ffmpeg.h:432
pixel format definitions
Definition: hwcontext.h:27
char * avfilter
Definition: ffmpeg.h:506
SpecifierOpt * autorotate
Definition: ffmpeg.h:133
int hwaccel_decode_init(AVCodecContext *avctx)
Definition: ffmpeg_hw.c:516
uint8_t * name
Definition: ffmpeg.h:240
float dts_delta_threshold
Definition: ffmpeg_opt.c:149
void * hwaccel_ctx
Definition: ffmpeg.h:372
int guess_input_channel_layout(InputStream *ist)
Definition: ffmpeg.c:2056
int top_field_first
Definition: ffmpeg.h:482
OutputFilter ** outputs
Definition: ffmpeg.h:292
SpecifierOpt * max_frames
Definition: ffmpeg.h:168
int nb_copy_initial_nonkeyframes
Definition: ffmpeg.h:199
int disabled
Definition: ffmpeg.h:81
AVRational frame_rate
Definition: ffmpeg.h:272
AVFormatContext * ctx
Definition: ffmpeg.h:558
int nb_output_files
Definition: ffmpeg.c:155
int hw_device_init_from_string(const char *arg, HWDevice **dev)
Definition: ffmpeg_hw.c:94
SpecifierOpt * codec_names
Definition: ffmpeg.h:103
void show_usage(void)
Definition: ffmpeg_opt.c:3265
int thread_queue_size
Definition: ffmpeg.h:121
An instance of a filter.
Definition: avfilter.h:338
char * hwaccel_device
Definition: ffmpeg.h:368
AVDictionary * encoder_opts
Definition: ffmpeg.h:510
FILE * out
Definition: movenc.c:54
InputFilter ** inputs
Definition: ffmpeg.h:290
char * videotoolbox_pixfmt
int sync_stream_index
Definition: ffmpeg.h:85
int format
Definition: ffmpeg.h:273
int copy_tb
Definition: ffmpeg_opt.c:163
int64_t min_pts
Definition: ffmpeg.h:322
int initialized
Definition: ffmpeg.h:522
int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
int discard
Definition: ffmpeg.h:299
int64_t first_pts
Definition: ffmpeg.h:458
int nb_inputs
Definition: ffmpeg.h:291
int index
Definition: ffmpeg.h:447
Pixel format.
Definition: pixfmt.h:64
Definition: ffmpeg.h:440
int nb_reinit_filters
Definition: ffmpeg.h:207
AVFifoBuffer * frame_queue
Definition: ffmpeg.h:243
int debug_ts
Definition: ffmpeg_opt.c:164
static void hwaccel_uninit(AVCodecContext *avctx)
Definition: decode.c:1267
int nb_guess_layout_max
Definition: ffmpeg.h:219
void term_init(void)
Definition: ffmpeg.c:395
int nb_frame_aspect_ratios
Definition: ffmpeg.h:183
const HWAccel hwaccels[]
Definition: ffmpeg_opt.c:134
int videotoolbox_init(AVCodecContext *s)
Definition: ffmpeg.h:431
simple arithmetic expression evaluator
const char * name
Definition: opengl_enc.c:102
int subtitle_disable
Definition: ffmpeg.h:159