2 * This file is part of FFmpeg.
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.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
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
34 #include "libavformat/avformat.h"
35 #include "libavformat/avio.h"
37 #include "libavcodec/avcodec.h"
39 #include "libavfilter/avfilter.h"
41 #include "libavutil/avutil.h"
42 #include "libavutil/dict.h"
43 #include "libavutil/eval.h"
44 #include "libavutil/fifo.h"
45 #include "libavutil/pixfmt.h"
46 #include "libavutil/rational.h"
47 #include "libavutil/threadmessage.h"
49 #include "libswresample/swresample.h"
52 #define VSYNC_PASSTHROUGH 0
55 #define VSYNC_VSCFR 0xfe
56 #define VSYNC_DROP 0xff
58 #define MAX_STREAMS 1024 /* arbitrary sanity check value */
72 typedef struct HWAccel {
74 int (*init)(AVCodecContext *s);
76 enum AVPixelFormat pix_fmt;
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 */
85 int sync_stream_index;
86 char *linklabel; /* name of an output link, for mapping lavfi outputs */
90 int file_idx, stream_idx, channel_idx; // input
91 int ofile_idx, ostream_idx; // output
94 typedef struct OptionsContext {
97 /* input/output options */
99 int64_t start_time_eof;
103 SpecifierOpt *codec_names;
105 SpecifierOpt *audio_channels;
106 int nb_audio_channels;
107 SpecifierOpt *audio_sample_rate;
108 int nb_audio_sample_rate;
109 SpecifierOpt *frame_rates;
111 SpecifierOpt *frame_sizes;
113 SpecifierOpt *frame_pix_fmts;
114 int nb_frame_pix_fmts;
117 int64_t input_ts_offset;
121 int thread_queue_size;
123 SpecifierOpt *ts_scale;
125 SpecifierOpt *dump_attachment;
126 int nb_dump_attachment;
127 SpecifierOpt *hwaccels;
129 SpecifierOpt *hwaccel_devices;
130 int nb_hwaccel_devices;
131 SpecifierOpt *hwaccel_output_formats;
132 int nb_hwaccel_output_formats;
133 SpecifierOpt *autorotate;
137 StreamMap *stream_maps;
139 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
140 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
141 int metadata_global_manual;
142 int metadata_streams_manual;
143 int metadata_chapters_manual;
144 const char **attachments;
147 int chapters_input_file;
149 int64_t recording_time;
151 uint64_t limit_filesize;
158 int subtitle_disable;
161 /* indexed by output file stream index */
165 SpecifierOpt *metadata;
167 SpecifierOpt *max_frames;
169 SpecifierOpt *bitstream_filters;
170 int nb_bitstream_filters;
171 SpecifierOpt *codec_tags;
173 SpecifierOpt *sample_fmts;
175 SpecifierOpt *qscale;
177 SpecifierOpt *forced_key_frames;
178 int nb_forced_key_frames;
179 SpecifierOpt *force_fps;
181 SpecifierOpt *frame_aspect_ratios;
182 int nb_frame_aspect_ratios;
183 SpecifierOpt *rc_overrides;
185 SpecifierOpt *intra_matrices;
186 int nb_intra_matrices;
187 SpecifierOpt *inter_matrices;
188 int nb_inter_matrices;
189 SpecifierOpt *chroma_intra_matrices;
190 int nb_chroma_intra_matrices;
191 SpecifierOpt *top_field_first;
192 int nb_top_field_first;
193 SpecifierOpt *metadata_map;
195 SpecifierOpt *presets;
197 SpecifierOpt *copy_initial_nonkeyframes;
198 int nb_copy_initial_nonkeyframes;
199 SpecifierOpt *copy_prior_start;
200 int nb_copy_prior_start;
201 SpecifierOpt *filters;
203 SpecifierOpt *filter_scripts;
204 int nb_filter_scripts;
205 SpecifierOpt *reinit_filters;
206 int nb_reinit_filters;
207 SpecifierOpt *fix_sub_duration;
208 int nb_fix_sub_duration;
209 SpecifierOpt *canvas_sizes;
213 SpecifierOpt *passlogfiles;
215 SpecifierOpt *max_muxing_queue_size;
216 int nb_max_muxing_queue_size;
217 SpecifierOpt *guess_layout_max;
218 int nb_guess_layout_max;
221 SpecifierOpt *discard;
223 SpecifierOpt *disposition;
225 SpecifierOpt *program;
227 SpecifierOpt *time_bases;
231 typedef struct InputFilter {
232 AVFilterContext *filter;
233 struct InputStream *ist;
234 struct FilterGraph *graph;
237 // parameters configured for this input
241 AVRational sample_aspect_ratio;
245 uint64_t channel_layout;
247 AVBufferRef *hw_frames_ctx;
250 typedef struct OutputFilter {
251 AVFilterContext *filter;
252 struct OutputStream *ost;
253 struct FilterGraph *graph;
256 /* temporary storage until stream maps are processed */
257 AVFilterInOut *out_tmp;
258 enum AVMediaType type;
260 /* desired output stream properties */
262 AVRational frame_rate;
265 uint64_t channel_layout;
267 // those are only set if no format is specified and the encoder gives us multiple options
269 uint64_t *channel_layouts;
273 typedef struct FilterGraph {
275 const char *graph_desc;
277 AVFilterGraph *graph;
280 InputFilter **inputs;
282 OutputFilter **outputs;
286 typedef struct InputStream {
289 int discard; /* true if stream data should be discarded */
290 int user_set_discard;
291 int decoding_needed; /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
292 #define DECODING_FOR_OST 1
293 #define DECODING_FOR_FILTER 2
295 AVCodecContext *dec_ctx;
297 AVFrame *decoded_frame;
298 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
300 int64_t start; /* time when read started */
301 /* predicted dts of the next packet read for this stream or (when there are
302 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
304 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
306 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
307 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
308 int wrap_correction_done;
310 int64_t filter_in_rescale_delta_last;
312 int64_t min_pts; /* pts with the smallest value in a current stream */
313 int64_t max_pts; /* pts with the higher value in a current stream */
314 int64_t nb_samples; /* number of samples in the last decoded audio frame before looping */
318 AVDictionary *decoder_opts;
319 AVRational framerate; /* framerate forced with -r */
321 int guess_layout_max;
326 int resample_pix_fmt;
328 int resample_sample_fmt;
329 int resample_sample_rate;
330 int resample_channels;
331 uint64_t resample_channel_layout;
333 int fix_sub_duration;
334 struct { /* previous decoded subtitle and related variables */
349 /* decoded data from this stream goes into all those filters
350 * currently video and audio only */
351 InputFilter **filters;
356 /* hwaccel options */
357 enum HWAccelID hwaccel_id;
358 char *hwaccel_device;
359 enum AVPixelFormat hwaccel_output_format;
361 /* hwaccel context */
362 enum HWAccelID active_hwaccel_id;
364 void (*hwaccel_uninit)(AVCodecContext *s);
365 int (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
366 int (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
367 enum AVPixelFormat hwaccel_pix_fmt;
368 enum AVPixelFormat hwaccel_retrieved_pix_fmt;
369 AVBufferRef *hw_frames_ctx;
372 // combined size of all the packets read
374 /* number of packets successfully read for this stream */
376 // number of frames/samples retrieved from the decoder
377 uint64_t frames_decoded;
378 uint64_t samples_decoded;
384 typedef struct InputFile {
385 AVFormatContext *ctx;
386 int eof_reached; /* true if eof reached */
387 int eagain; /* true if last read attempt returned EAGAIN */
388 int ist_index; /* index of first stream in input_streams */
389 int loop; /* set number of times input stream should be looped */
390 int64_t duration; /* actual duration of the longest stream in a file
391 at the moment when looping happens */
392 AVRational time_base; /* time base of the duration */
393 int64_t input_ts_offset;
397 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
399 int64_t recording_time;
400 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
401 from ctx.nb_streams if new streams appear during av_read_frame() */
402 int nb_streams_warn; /* number of streams that the user was warned of */
407 AVThreadMessageQueue *in_thread_queue;
408 pthread_t thread; /* thread reading from this file */
409 int non_blocking; /* reading packets from the thread should not block */
410 int joined; /* the thread has been joined */
411 int thread_queue_size; /* maximum number of queued packets */
415 enum forced_keyframes_const {
424 #define ABORT_ON_FLAG_EMPTY_OUTPUT (1 << 0)
426 extern const char *const forced_keyframes_const_names[];
429 ENCODER_FINISHED = 1,
433 typedef struct OutputStream {
434 int file_index; /* file index */
435 int index; /* stream index in the output file */
436 int source_index; /* InputStream index */
437 AVStream *st; /* stream in the output file */
438 int encoding_needed; /* true if encoding needed for this stream */
440 /* input pts and corresponding output pts
442 struct InputStream *sync_ist; /* input stream to sync against */
443 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
444 /* pts of the first frame encoded for this stream, used for limiting
447 /* dts of the last packet sent to the muxer */
448 int64_t last_mux_dts;
450 int nb_bitstream_filters;
451 uint8_t *bsf_extradata_updated;
452 AVBSFContext **bsf_ctx;
454 AVCodecContext *enc_ctx;
455 AVCodecParameters *ref_par; /* associated input codec parameters with encoders options applied */
458 AVFrame *filtered_frame;
461 int last_nb0_frames[3];
466 AVRational frame_rate;
470 int rotate_overridden;
472 AVRational frame_aspect_ratio;
474 /* forced key frames */
475 int64_t *forced_kf_pts;
478 char *forced_keyframes;
479 AVExpr *forced_keyframes_pexpr;
480 double forced_keyframes_expr_const_values[FKF_NB];
483 int *audio_channels_map; /* list of the channels id to pick from the source stream */
484 int audio_channels_mapped; /* number of channels in audio_channels_map */
486 char *logfile_prefix;
489 OutputFilter *filter;
491 char *filters; ///< filtergraph associated to the -filter option
492 char *filters_script; ///< filtergraph script associated to the -filter_script option
494 AVDictionary *encoder_opts;
495 AVDictionary *sws_dict;
496 AVDictionary *swr_opts;
497 AVDictionary *resample_opts;
499 OSTFinished finished; /* no more packets should be written for this stream */
500 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
503 // init_output_stream() has been called for this stream
504 // The encoder and the bitstream filters have been initialized and the stream
505 // parameters are set in the AVStream.
508 const char *attachment_filename;
509 int copy_initial_nonkeyframes;
510 int copy_prior_start;
515 AVCodecParserContext *parser;
516 AVCodecContext *parser_avctx;
519 // combined size of all the packets written
521 // number of packets send to the muxer
522 uint64_t packets_written;
523 // number of frames/samples sent to the encoder
524 uint64_t frames_encoded;
525 uint64_t samples_encoded;
527 /* packet quality factor */
530 int max_muxing_queue_size;
532 /* the packets are buffered here until the muxer is ready to be initialized */
533 AVFifoBuffer *muxing_queue;
535 /* packet picture type */
538 /* frame encode sum of squared error values */
542 typedef struct OutputFile {
543 AVFormatContext *ctx;
545 int ost_index; /* index of the first stream in output_streams */
546 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
547 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
548 uint64_t limit_filesize; /* filesize limit expressed in bytes */
555 extern InputStream **input_streams;
556 extern int nb_input_streams;
557 extern InputFile **input_files;
558 extern int nb_input_files;
560 extern OutputStream **output_streams;
561 extern int nb_output_streams;
562 extern OutputFile **output_files;
563 extern int nb_output_files;
565 extern FilterGraph **filtergraphs;
566 extern int nb_filtergraphs;
568 extern char *vstats_filename;
569 extern char *sdp_filename;
571 extern float audio_drift_threshold;
572 extern float dts_delta_threshold;
573 extern float dts_error_threshold;
575 extern int audio_volume;
576 extern int audio_sync_method;
577 extern int video_sync_method;
578 extern float frame_drop_threshold;
579 extern int do_benchmark;
580 extern int do_benchmark_all;
581 extern int do_deinterlace;
582 extern int do_hex_dump;
583 extern int do_pkt_dump;
585 extern int start_at_zero;
588 extern int exit_on_error;
589 extern int abort_on_flags;
590 extern int print_stats;
592 extern int stdin_interaction;
593 extern int frame_bits_per_raw_sample;
594 extern AVIOContext *progress_avio;
595 extern float max_error_rate;
596 extern char *videotoolbox_pixfmt;
598 extern int filter_nbthreads;
599 extern int filter_complex_nbthreads;
600 extern int vstats_version;
602 extern const AVIOInterruptCB int_cb;
604 extern const OptionDef options[];
605 extern const HWAccel hwaccels[];
606 extern int hwaccel_lax_profile_check;
607 extern AVBufferRef *hw_device_ctx;
609 extern char *qsv_device;
613 void term_init(void);
614 void term_exit(void);
616 void reset_options(OptionsContext *o, int is_input);
617 void show_usage(void);
619 void opt_output_file(void *optctx, const char *filename);
621 void remove_avoptions(AVDictionary **a, AVDictionary *b);
622 void assert_avoptions(AVDictionary *m);
624 int guess_input_channel_layout(InputStream *ist);
626 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, AVCodec *codec, enum AVPixelFormat target);
627 void choose_sample_fmt(AVStream *st, AVCodec *codec);
629 int configure_filtergraph(FilterGraph *fg);
630 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
631 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
632 int filtergraph_is_simple(FilterGraph *fg);
633 int init_simple_filtergraph(InputStream *ist, OutputStream *ost);
634 int init_complex_filtergraph(FilterGraph *fg);
636 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame);
637 int ifilter_parameters_from_decoder(InputFilter *ifilter, const AVCodecContext *avctx);
639 int ffmpeg_parse_options(int argc, char **argv);
641 int vdpau_init(AVCodecContext *s);
642 int dxva2_init(AVCodecContext *s);
643 int vda_init(AVCodecContext *s);
644 int videotoolbox_init(AVCodecContext *s);
645 int qsv_init(AVCodecContext *s);
646 int qsv_transcode_init(OutputStream *ost);
647 int vaapi_decode_init(AVCodecContext *avctx);
648 int vaapi_device_init(const char *device);
649 int cuvid_init(AVCodecContext *s);
650 int cuvid_transcode_init(OutputStream *ost);
652 #endif /* FFMPEG_H */