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ffmpeg_filter.c
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1 /*
2  * ffmpeg filter configuration
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <stdint.h>
22 
23 #include "ffmpeg.h"
24 
25 #include "libavfilter/avfilter.h"
26 #include "libavfilter/buffersink.h"
27 #include "libavfilter/buffersrc.h"
28 
30 
31 #include "libavutil/avassert.h"
32 #include "libavutil/avstring.h"
33 #include "libavutil/bprint.h"
35 #include "libavutil/display.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavutil/pixfmt.h"
39 #include "libavutil/imgutils.h"
40 #include "libavutil/samplefmt.h"
41 
42 static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
43 {
44  static const enum AVPixelFormat mjpeg_formats[] =
48  static const enum AVPixelFormat ljpeg_formats[] =
53 
54  if (codec_id == AV_CODEC_ID_MJPEG) {
55  return mjpeg_formats;
56  } else if (codec_id == AV_CODEC_ID_LJPEG) {
57  return ljpeg_formats;
58  } else {
59  return default_formats;
60  }
61 }
62 
64 {
65  if (codec && codec->pix_fmts) {
66  const enum AVPixelFormat *p = codec->pix_fmts;
68  //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
69  int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
70  enum AVPixelFormat best= AV_PIX_FMT_NONE;
71 
74  }
75  for (; *p != AV_PIX_FMT_NONE; p++) {
76  best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
77  if (*p == target)
78  break;
79  }
80  if (*p == AV_PIX_FMT_NONE) {
81  if (target != AV_PIX_FMT_NONE)
83  "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
84  av_get_pix_fmt_name(target),
85  codec->name,
86  av_get_pix_fmt_name(best));
87  return best;
88  }
89  }
90  return target;
91 }
92 
94 {
95  if (codec && codec->sample_fmts) {
96  const enum AVSampleFormat *p = codec->sample_fmts;
97  for (; *p != -1; p++) {
98  if (*p == st->codecpar->format)
99  break;
100  }
101  if (*p == -1) {
103  av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
106  "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
108  codec->name,
110  st->codecpar->format = codec->sample_fmts[0];
111  }
112  }
113 }
114 
115 static char *choose_pix_fmts(OutputFilter *ofilter)
116 {
117  OutputStream *ost = ofilter->ost;
118  AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
119  if (strict_dict)
120  // used by choose_pixel_fmt() and below
121  av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
122 
123  if (ost->keep_pix_fmt) {
126  if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
127  return NULL;
129  }
130  if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
131  return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
132  } else if (ost->enc && ost->enc->pix_fmts) {
133  const enum AVPixelFormat *p;
134  AVIOContext *s = NULL;
135  uint8_t *ret;
136  int len;
137 
138  if (avio_open_dyn_buf(&s) < 0)
139  exit_program(1);
140 
141  p = ost->enc->pix_fmts;
144  }
145 
146  for (; *p != AV_PIX_FMT_NONE; p++) {
147  const char *name = av_get_pix_fmt_name(*p);
148  avio_printf(s, "%s|", name);
149  }
150  len = avio_close_dyn_buf(s, &ret);
151  ret[len - 1] = 0;
152  return ret;
153  } else
154  return NULL;
155 }
156 
157 /* Define a function for building a string containing a list of
158  * allowed formats. */
159 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name) \
160 static char *choose_ ## suffix (OutputFilter *ofilter) \
161 { \
162  if (ofilter->var != none) { \
163  get_name(ofilter->var); \
164  return av_strdup(name); \
165  } else if (ofilter->supported_list) { \
166  const type *p; \
167  AVIOContext *s = NULL; \
168  uint8_t *ret; \
169  int len; \
170  \
171  if (avio_open_dyn_buf(&s) < 0) \
172  exit_program(1); \
173  \
174  for (p = ofilter->supported_list; *p != none; p++) { \
175  get_name(*p); \
176  avio_printf(s, "%s|", name); \
177  } \
178  len = avio_close_dyn_buf(s, &ret); \
179  ret[len - 1] = 0; \
180  return ret; \
181  } else \
182  return NULL; \
183 }
184 
185 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
186 // GET_PIX_FMT_NAME)
187 
190 
193 
194 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
196 
198 {
199  FilterGraph *fg = av_mallocz(sizeof(*fg));
200 
201  if (!fg)
202  exit_program(1);
203  fg->index = nb_filtergraphs;
204 
205  GROW_ARRAY(fg->outputs, fg->nb_outputs);
206  if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
207  exit_program(1);
208  fg->outputs[0]->ost = ost;
209  fg->outputs[0]->graph = fg;
210  fg->outputs[0]->format = -1;
211 
212  ost->filter = fg->outputs[0];
213 
214  GROW_ARRAY(fg->inputs, fg->nb_inputs);
215  if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
216  exit_program(1);
217  fg->inputs[0]->ist = ist;
218  fg->inputs[0]->graph = fg;
219  fg->inputs[0]->format = -1;
220 
221  fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
222  if (!fg->inputs[0]->frame_queue)
223  exit_program(1);
224 
225  GROW_ARRAY(ist->filters, ist->nb_filters);
226  ist->filters[ist->nb_filters - 1] = fg->inputs[0];
227 
229  filtergraphs[nb_filtergraphs - 1] = fg;
230 
231  return 0;
232 }
233 
234 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
235 {
236  AVFilterContext *ctx = inout->filter_ctx;
237  AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads;
238  int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs;
239  AVIOContext *pb;
240  uint8_t *res = NULL;
241 
242  if (avio_open_dyn_buf(&pb) < 0)
243  exit_program(1);
244 
245  avio_printf(pb, "%s", ctx->filter->name);
246  if (nb_pads > 1)
247  avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
248  avio_w8(pb, 0);
249  avio_close_dyn_buf(pb, &res);
250  return res;
251 }
252 
254 {
255  InputStream *ist = NULL;
257  int i;
258 
259  // TODO: support other filter types
260  if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
261  av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
262  "currently.\n");
263  exit_program(1);
264  }
265 
266  if (in->name) {
268  AVStream *st = NULL;
269  char *p;
270  int file_idx = strtol(in->name, &p, 0);
271 
272  if (file_idx < 0 || file_idx >= nb_input_files) {
273  av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
274  file_idx, fg->graph_desc);
275  exit_program(1);
276  }
277  s = input_files[file_idx]->ctx;
278 
279  for (i = 0; i < s->nb_streams; i++) {
280  enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
281  if (stream_type != type &&
282  !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
283  type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
284  continue;
285  if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
286  st = s->streams[i];
287  break;
288  }
289  }
290  if (!st) {
291  av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
292  "matches no streams.\n", p, fg->graph_desc);
293  exit_program(1);
294  }
295  ist = input_streams[input_files[file_idx]->ist_index + st->index];
296  if (ist->user_set_discard == AVDISCARD_ALL) {
297  av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
298  "matches a disabled input stream.\n", p, fg->graph_desc);
299  exit_program(1);
300  }
301  } else {
302  /* find the first unused stream of corresponding type */
303  for (i = 0; i < nb_input_streams; i++) {
304  ist = input_streams[i];
305  if (ist->user_set_discard == AVDISCARD_ALL)
306  continue;
307  if (ist->dec_ctx->codec_type == type && ist->discard)
308  break;
309  }
310  if (i == nb_input_streams) {
311  av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
312  "unlabeled input pad %d on filter %s\n", in->pad_idx,
313  in->filter_ctx->name);
314  exit_program(1);
315  }
316  }
317  av_assert0(ist);
318 
319  ist->discard = 0;
321  ist->st->discard = AVDISCARD_NONE;
322 
323  GROW_ARRAY(fg->inputs, fg->nb_inputs);
324  if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
325  exit_program(1);
326  fg->inputs[fg->nb_inputs - 1]->ist = ist;
327  fg->inputs[fg->nb_inputs - 1]->graph = fg;
328  fg->inputs[fg->nb_inputs - 1]->format = -1;
329  fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
330  fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
331 
332  fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
333  if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
334  exit_program(1);
335 
336  GROW_ARRAY(ist->filters, ist->nb_filters);
337  ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
338 }
339 
341 {
342  AVFilterInOut *inputs, *outputs, *cur;
343  AVFilterGraph *graph;
344  int ret = 0;
345 
346  /* this graph is only used for determining the kinds of inputs
347  * and outputs we have, and is discarded on exit from this function */
348  graph = avfilter_graph_alloc();
349  if (!graph)
350  return AVERROR(ENOMEM);
351  graph->nb_threads = 1;
352 
353  ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
354  if (ret < 0)
355  goto fail;
356 
357  for (cur = inputs; cur; cur = cur->next)
358  init_input_filter(fg, cur);
359 
360  for (cur = outputs; cur;) {
361  GROW_ARRAY(fg->outputs, fg->nb_outputs);
362  fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
363  if (!fg->outputs[fg->nb_outputs - 1])
364  exit_program(1);
365 
366  fg->outputs[fg->nb_outputs - 1]->graph = fg;
367  fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
369  cur->pad_idx);
370  fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
371  cur = cur->next;
372  fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
373  }
374 
375 fail:
376  avfilter_inout_free(&inputs);
377  avfilter_graph_free(&graph);
378  return ret;
379 }
380 
381 static int insert_trim(int64_t start_time, int64_t duration,
382  AVFilterContext **last_filter, int *pad_idx,
383  const char *filter_name)
384 {
385  AVFilterGraph *graph = (*last_filter)->graph;
387  const AVFilter *trim;
388  enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
389  const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
390  int ret = 0;
391 
392  if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
393  return 0;
394 
395  trim = avfilter_get_by_name(name);
396  if (!trim) {
397  av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
398  "recording time.\n", name);
400  }
401 
402  ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
403  if (!ctx)
404  return AVERROR(ENOMEM);
405 
406  if (duration != INT64_MAX) {
407  ret = av_opt_set_int(ctx, "durationi", duration,
409  }
410  if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
411  ret = av_opt_set_int(ctx, "starti", start_time,
413  }
414  if (ret < 0) {
415  av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
416  return ret;
417  }
418 
419  ret = avfilter_init_str(ctx, NULL);
420  if (ret < 0)
421  return ret;
422 
423  ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
424  if (ret < 0)
425  return ret;
426 
427  *last_filter = ctx;
428  *pad_idx = 0;
429  return 0;
430 }
431 
432 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
433  const char *filter_name, const char *args)
434 {
435  AVFilterGraph *graph = (*last_filter)->graph;
437  int ret;
438 
439  ret = avfilter_graph_create_filter(&ctx,
440  avfilter_get_by_name(filter_name),
441  filter_name, args, NULL, graph);
442  if (ret < 0)
443  return ret;
444 
445  ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
446  if (ret < 0)
447  return ret;
448 
449  *last_filter = ctx;
450  *pad_idx = 0;
451  return 0;
452 }
453 
455 {
456  char *pix_fmts;
457  OutputStream *ost = ofilter->ost;
458  OutputFile *of = output_files[ost->file_index];
459  AVFilterContext *last_filter = out->filter_ctx;
460  int pad_idx = out->pad_idx;
461  int ret;
462  char name[255];
463 
464  snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
465  ret = avfilter_graph_create_filter(&ofilter->filter,
466  avfilter_get_by_name("buffersink"),
467  name, NULL, NULL, fg->graph);
468 
469  if (ret < 0)
470  return ret;
471 
472  if (ofilter->width || ofilter->height) {
473  char args[255];
475  AVDictionaryEntry *e = NULL;
476 
477  snprintf(args, sizeof(args), "%d:%d",
478  ofilter->width, ofilter->height);
479 
480  while ((e = av_dict_get(ost->sws_dict, "", e,
482  av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
483  }
484 
485  snprintf(name, sizeof(name), "scaler_out_%d_%d",
486  ost->file_index, ost->index);
487  if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
488  name, args, NULL, fg->graph)) < 0)
489  return ret;
490  if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
491  return ret;
492 
493  last_filter = filter;
494  pad_idx = 0;
495  }
496 
497  if ((pix_fmts = choose_pix_fmts(ofilter))) {
499  snprintf(name, sizeof(name), "format_out_%d_%d",
500  ost->file_index, ost->index);
501  ret = avfilter_graph_create_filter(&filter,
502  avfilter_get_by_name("format"),
503  "format", pix_fmts, NULL, fg->graph);
504  av_freep(&pix_fmts);
505  if (ret < 0)
506  return ret;
507  if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
508  return ret;
509 
510  last_filter = filter;
511  pad_idx = 0;
512  }
513 
514  if (ost->frame_rate.num && 0) {
515  AVFilterContext *fps;
516  char args[255];
517 
518  snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
519  ost->frame_rate.den);
520  snprintf(name, sizeof(name), "fps_out_%d_%d",
521  ost->file_index, ost->index);
523  name, args, NULL, fg->graph);
524  if (ret < 0)
525  return ret;
526 
527  ret = avfilter_link(last_filter, pad_idx, fps, 0);
528  if (ret < 0)
529  return ret;
530  last_filter = fps;
531  pad_idx = 0;
532  }
533 
534  snprintf(name, sizeof(name), "trim_out_%d_%d",
535  ost->file_index, ost->index);
536  ret = insert_trim(of->start_time, of->recording_time,
537  &last_filter, &pad_idx, name);
538  if (ret < 0)
539  return ret;
540 
541 
542  if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
543  return ret;
544 
545  return 0;
546 }
547 
549 {
550  OutputStream *ost = ofilter->ost;
551  OutputFile *of = output_files[ost->file_index];
552  AVCodecContext *codec = ost->enc_ctx;
553  AVFilterContext *last_filter = out->filter_ctx;
554  int pad_idx = out->pad_idx;
556  char name[255];
557  int ret;
558 
559  snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
560  ret = avfilter_graph_create_filter(&ofilter->filter,
561  avfilter_get_by_name("abuffersink"),
562  name, NULL, NULL, fg->graph);
563  if (ret < 0)
564  return ret;
565  if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
566  return ret;
567 
568 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
569  AVFilterContext *filt_ctx; \
570  \
571  av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
572  "similarly to -af " filter_name "=%s.\n", arg); \
573  \
574  ret = avfilter_graph_create_filter(&filt_ctx, \
575  avfilter_get_by_name(filter_name), \
576  filter_name, arg, NULL, fg->graph); \
577  if (ret < 0) \
578  return ret; \
579  \
580  ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
581  if (ret < 0) \
582  return ret; \
583  \
584  last_filter = filt_ctx; \
585  pad_idx = 0; \
586 } while (0)
587  if (ost->audio_channels_mapped) {
588  int i;
589  AVBPrint pan_buf;
590  av_bprint_init(&pan_buf, 256, 8192);
591  av_bprintf(&pan_buf, "0x%"PRIx64,
593  for (i = 0; i < ost->audio_channels_mapped; i++)
594  if (ost->audio_channels_map[i] != -1)
595  av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
596 
597  AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
598  av_bprint_finalize(&pan_buf, NULL);
599  }
600 
601  if (codec->channels && !codec->channel_layout)
603 
604  sample_fmts = choose_sample_fmts(ofilter);
605  sample_rates = choose_sample_rates(ofilter);
606  channel_layouts = choose_channel_layouts(ofilter);
607  if (sample_fmts || sample_rates || channel_layouts) {
609  char args[256];
610  args[0] = 0;
611 
612  if (sample_fmts)
613  av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
614  sample_fmts);
615  if (sample_rates)
616  av_strlcatf(args, sizeof(args), "sample_rates=%s:",
617  sample_rates);
618  if (channel_layouts)
619  av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
620  channel_layouts);
621 
622  av_freep(&sample_fmts);
623  av_freep(&sample_rates);
624  av_freep(&channel_layouts);
625 
626  snprintf(name, sizeof(name), "format_out_%d_%d",
627  ost->file_index, ost->index);
628  ret = avfilter_graph_create_filter(&format,
629  avfilter_get_by_name("aformat"),
630  name, args, NULL, fg->graph);
631  if (ret < 0)
632  return ret;
633 
634  ret = avfilter_link(last_filter, pad_idx, format, 0);
635  if (ret < 0)
636  return ret;
637 
638  last_filter = format;
639  pad_idx = 0;
640  }
641 
642  if (audio_volume != 256 && 0) {
643  char args[256];
644 
645  snprintf(args, sizeof(args), "%f", audio_volume / 256.);
646  AUTO_INSERT_FILTER("-vol", "volume", args);
647  }
648 
649  if (ost->apad && of->shortest) {
650  char args[256];
651  int i;
652 
653  for (i=0; i<of->ctx->nb_streams; i++)
655  break;
656 
657  if (i<of->ctx->nb_streams) {
658  snprintf(args, sizeof(args), "%s", ost->apad);
659  AUTO_INSERT_FILTER("-apad", "apad", args);
660  }
661  }
662 
663  snprintf(name, sizeof(name), "trim for output stream %d:%d",
664  ost->file_index, ost->index);
665  ret = insert_trim(of->start_time, of->recording_time,
666  &last_filter, &pad_idx, name);
667  if (ret < 0)
668  return ret;
669 
670  if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
671  return ret;
672 
673  return 0;
674 }
675 
677 {
678  if (!ofilter->ost) {
679  av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
680  exit_program(1);
681  }
682 
683  switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
684  case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
685  case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
686  default: av_assert0(0);
687  }
688 }
689 
691 {
692  int i;
693  for (i = 0; i < nb_filtergraphs; i++) {
694  int n;
695  for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
696  OutputFilter *output = filtergraphs[i]->outputs[n];
697  if (!output->ost) {
698  av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
699  exit_program(1);
700  }
701  }
702  }
703 }
704 
705 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
706 {
708  int i, w, h;
709 
710  /* Compute the size of the canvas for the subtitles stream.
711  If the subtitles codecpar has set a size, use it. Otherwise use the
712  maximum dimensions of the video streams in the same file. */
713  w = ifilter->width;
714  h = ifilter->height;
715  if (!(w && h)) {
716  for (i = 0; i < avf->nb_streams; i++) {
717  if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
718  w = FFMAX(w, avf->streams[i]->codecpar->width);
719  h = FFMAX(h, avf->streams[i]->codecpar->height);
720  }
721  }
722  if (!(w && h)) {
723  w = FFMAX(w, 720);
724  h = FFMAX(h, 576);
725  }
726  av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
727  }
728  ist->sub2video.w = ifilter->width = w;
729  ist->sub2video.h = ifilter->height = h;
730 
731  ifilter->width = ist->dec_ctx->width ? ist->dec_ctx->width : ist->sub2video.w;
732  ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
733 
734  /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
735  palettes for all rectangles are identical or compatible */
736  ifilter->format = AV_PIX_FMT_RGB32;
737 
738  ist->sub2video.frame = av_frame_alloc();
739  if (!ist->sub2video.frame)
740  return AVERROR(ENOMEM);
741  ist->sub2video.last_pts = INT64_MIN;
742  return 0;
743 }
744 
746  AVFilterInOut *in)
747 {
748  AVFilterContext *last_filter;
749  const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
750  InputStream *ist = ifilter->ist;
752  AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
753  ist->st->time_base;
754  AVRational fr = ist->framerate;
755  AVRational sar;
756  AVBPrint args;
757  char name[255];
758  int ret, pad_idx = 0;
759  int64_t tsoffset = 0;
761 
762  if (!par)
763  return AVERROR(ENOMEM);
764  memset(par, 0, sizeof(*par));
765  par->format = AV_PIX_FMT_NONE;
766 
767  if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
768  av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
769  ret = AVERROR(EINVAL);
770  goto fail;
771  }
772 
773  if (!fr.num)
774  fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
775 
777  ret = sub2video_prepare(ist, ifilter);
778  if (ret < 0)
779  goto fail;
780  }
781 
782  sar = ifilter->sample_aspect_ratio;
783  if(!sar.den)
784  sar = (AVRational){0,1};
786  av_bprintf(&args,
787  "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
788  "pixel_aspect=%d/%d:sws_param=flags=%d",
789  ifilter->width, ifilter->height, ifilter->format,
790  tb.num, tb.den, sar.num, sar.den,
792  if (fr.num && fr.den)
793  av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
794  snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
795  ist->file_index, ist->st->index);
796 
797 
798  if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
799  args.str, NULL, fg->graph)) < 0)
800  goto fail;
801  par->hw_frames_ctx = ifilter->hw_frames_ctx;
802  ret = av_buffersrc_parameters_set(ifilter->filter, par);
803  if (ret < 0)
804  goto fail;
805  av_freep(&par);
806  last_filter = ifilter->filter;
807 
808  if (ist->autorotate) {
809  double theta = get_rotation(ist->st);
810 
811  if (fabs(theta - 90) < 1.0) {
812  ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
813  } else if (fabs(theta - 180) < 1.0) {
814  ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
815  if (ret < 0)
816  return ret;
817  ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
818  } else if (fabs(theta - 270) < 1.0) {
819  ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
820  } else if (fabs(theta) > 1.0) {
821  char rotate_buf[64];
822  snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
823  ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
824  }
825  if (ret < 0)
826  return ret;
827  }
828 
829  if (do_deinterlace) {
830  AVFilterContext *yadif;
831 
832  snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
833  ist->file_index, ist->st->index);
834  if ((ret = avfilter_graph_create_filter(&yadif,
835  avfilter_get_by_name("yadif"),
836  name, "", NULL,
837  fg->graph)) < 0)
838  return ret;
839 
840  if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
841  return ret;
842 
843  last_filter = yadif;
844  }
845 
846  snprintf(name, sizeof(name), "trim_in_%d_%d",
847  ist->file_index, ist->st->index);
848  if (copy_ts) {
849  tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
851  tsoffset += f->ctx->start_time;
852  }
853  ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
854  AV_NOPTS_VALUE : tsoffset, f->recording_time,
855  &last_filter, &pad_idx, name);
856  if (ret < 0)
857  return ret;
858 
859  if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
860  return ret;
861  return 0;
862 fail:
863  av_freep(&par);
864 
865  return ret;
866 }
867 
869  AVFilterInOut *in)
870 {
871  AVFilterContext *last_filter;
872  const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
873  InputStream *ist = ifilter->ist;
875  AVBPrint args;
876  char name[255];
877  int ret, pad_idx = 0;
878  int64_t tsoffset = 0;
879 
880  if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
881  av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
882  return AVERROR(EINVAL);
883  }
884 
886  av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
887  1, ifilter->sample_rate,
888  ifilter->sample_rate,
889  av_get_sample_fmt_name(ifilter->format));
890  if (ifilter->channel_layout)
891  av_bprintf(&args, ":channel_layout=0x%"PRIx64,
892  ifilter->channel_layout);
893  else
894  av_bprintf(&args, ":channels=%d", ifilter->channels);
895  snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
896  ist->file_index, ist->st->index);
897 
898  if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
899  name, args.str, NULL,
900  fg->graph)) < 0)
901  return ret;
902  last_filter = ifilter->filter;
903 
904 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
905  AVFilterContext *filt_ctx; \
906  \
907  av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
908  "similarly to -af " filter_name "=%s.\n", arg); \
909  \
910  snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d", \
911  fg->index, filter_name, ist->file_index, ist->st->index); \
912  ret = avfilter_graph_create_filter(&filt_ctx, \
913  avfilter_get_by_name(filter_name), \
914  name, arg, NULL, fg->graph); \
915  if (ret < 0) \
916  return ret; \
917  \
918  ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
919  if (ret < 0) \
920  return ret; \
921  \
922  last_filter = filt_ctx; \
923 } while (0)
924 
925  if (audio_sync_method > 0) {
926  char args[256] = {0};
927 
928  av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
929  if (audio_drift_threshold != 0.1)
930  av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
931  if (!fg->reconfiguration)
932  av_strlcatf(args, sizeof(args), ":first_pts=0");
933  AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
934  }
935 
936 // if (ost->audio_channels_mapped) {
937 // int i;
938 // AVBPrint pan_buf;
939 // av_bprint_init(&pan_buf, 256, 8192);
940 // av_bprintf(&pan_buf, "0x%"PRIx64,
941 // av_get_default_channel_layout(ost->audio_channels_mapped));
942 // for (i = 0; i < ost->audio_channels_mapped; i++)
943 // if (ost->audio_channels_map[i] != -1)
944 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
945 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
946 // av_bprint_finalize(&pan_buf, NULL);
947 // }
948 
949  if (audio_volume != 256) {
950  char args[256];
951 
952  av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
953  "audio filter instead.\n");
954 
955  snprintf(args, sizeof(args), "%f", audio_volume / 256.);
956  AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
957  }
958 
959  snprintf(name, sizeof(name), "trim for input stream %d:%d",
960  ist->file_index, ist->st->index);
961  if (copy_ts) {
962  tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
964  tsoffset += f->ctx->start_time;
965  }
966  ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
967  AV_NOPTS_VALUE : tsoffset, f->recording_time,
968  &last_filter, &pad_idx, name);
969  if (ret < 0)
970  return ret;
971 
972  if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
973  return ret;
974 
975  return 0;
976 }
977 
979  AVFilterInOut *in)
980 {
981  if (!ifilter->ist->dec) {
983  "No decoder for stream #%d:%d, filtering impossible\n",
984  ifilter->ist->file_index, ifilter->ist->st->index);
986  }
987  switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
988  case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
989  case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
990  default: av_assert0(0);
991  }
992 }
993 
995 {
996  int i;
997  for (i = 0; i < fg->nb_outputs; i++)
998  fg->outputs[i]->filter = (AVFilterContext *)NULL;
999  for (i = 0; i < fg->nb_inputs; i++)
1000  fg->inputs[i]->filter = (AVFilterContext *)NULL;
1001  avfilter_graph_free(&fg->graph);
1002 }
1003 
1005 {
1006  AVFilterInOut *inputs, *outputs, *cur;
1007  int ret, i, simple = filtergraph_is_simple(fg);
1008  const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1009  fg->graph_desc;
1010 
1011  cleanup_filtergraph(fg);
1012  if (!(fg->graph = avfilter_graph_alloc()))
1013  return AVERROR(ENOMEM);
1014 
1015  if (simple) {
1016  OutputStream *ost = fg->outputs[0]->ost;
1017  char args[512];
1018  AVDictionaryEntry *e = NULL;
1019 
1021 
1022  args[0] = 0;
1023  while ((e = av_dict_get(ost->sws_dict, "", e,
1025  av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1026  }
1027  if (strlen(args))
1028  args[strlen(args)-1] = 0;
1029  fg->graph->scale_sws_opts = av_strdup(args);
1030 
1031  args[0] = 0;
1032  while ((e = av_dict_get(ost->swr_opts, "", e,
1034  av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1035  }
1036  if (strlen(args))
1037  args[strlen(args)-1] = 0;
1038  av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1039 
1040  args[0] = '\0';
1041  while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1043  av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1044  }
1045  if (strlen(args))
1046  args[strlen(args) - 1] = '\0';
1047 
1048  e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1049  if (e)
1050  av_opt_set(fg->graph, "threads", e->value, 0);
1051  } else {
1053  }
1054 
1055  if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1056  goto fail;
1057 
1060  : hw_device_ctx;
1061  for (i = 0; i < fg->graph->nb_filters; i++) {
1062  fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(device);
1063  if (!fg->graph->filters[i]->hw_device_ctx) {
1064  ret = AVERROR(ENOMEM);
1065  goto fail;
1066  }
1067  }
1068  }
1069 
1070  if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1071  const char *num_inputs;
1072  const char *num_outputs;
1073  if (!outputs) {
1074  num_outputs = "0";
1075  } else if (outputs->next) {
1076  num_outputs = ">1";
1077  } else {
1078  num_outputs = "1";
1079  }
1080  if (!inputs) {
1081  num_inputs = "0";
1082  } else if (inputs->next) {
1083  num_inputs = ">1";
1084  } else {
1085  num_inputs = "1";
1086  }
1087  av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1088  "to have exactly 1 input and 1 output."
1089  " However, it had %s input(s) and %s output(s)."
1090  " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1091  graph_desc, num_inputs, num_outputs);
1092  ret = AVERROR(EINVAL);
1093  goto fail;
1094  }
1095 
1096  for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1097  if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1098  avfilter_inout_free(&inputs);
1099  avfilter_inout_free(&outputs);
1100  goto fail;
1101  }
1102  avfilter_inout_free(&inputs);
1103 
1104  for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1105  configure_output_filter(fg, fg->outputs[i], cur);
1106  avfilter_inout_free(&outputs);
1107 
1108  if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1109  goto fail;
1110 
1111  /* limit the lists of allowed formats to the ones selected, to
1112  * make sure they stay the same if the filtergraph is reconfigured later */
1113  for (i = 0; i < fg->nb_outputs; i++) {
1114  OutputFilter *ofilter = fg->outputs[i];
1115  AVFilterContext *sink = ofilter->filter;
1116 
1117  ofilter->format = av_buffersink_get_format(sink);
1118 
1119  ofilter->width = av_buffersink_get_w(sink);
1120  ofilter->height = av_buffersink_get_h(sink);
1121 
1122  ofilter->sample_rate = av_buffersink_get_sample_rate(sink);
1124  }
1125 
1126  fg->reconfiguration = 1;
1127 
1128  for (i = 0; i < fg->nb_outputs; i++) {
1129  OutputStream *ost = fg->outputs[i]->ost;
1130  if (!ost->enc) {
1131  /* identical to the same check in ffmpeg.c, needed because
1132  complex filter graphs are initialized earlier */
1133  av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1134  avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1135  ret = AVERROR(EINVAL);
1136  goto fail;
1137  }
1138  if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1139  !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1141  ost->enc_ctx->frame_size);
1142  }
1143 
1144  for (i = 0; i < fg->nb_inputs; i++) {
1145  while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1146  AVFrame *tmp;
1147  av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1148  ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1149  av_frame_free(&tmp);
1150  if (ret < 0)
1151  goto fail;
1152  }
1153  }
1154 
1155  /* send the EOFs for the finished inputs */
1156  for (i = 0; i < fg->nb_inputs; i++) {
1157  if (fg->inputs[i]->eof) {
1158  ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1159  if (ret < 0)
1160  goto fail;
1161  }
1162  }
1163 
1164  /* process queued up subtitle packets */
1165  for (i = 0; i < fg->nb_inputs; i++) {
1166  InputStream *ist = fg->inputs[i]->ist;
1167  if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1168  while (av_fifo_size(ist->sub2video.sub_queue)) {
1169  AVSubtitle tmp;
1170  av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1171  sub2video_update(ist, &tmp);
1172  avsubtitle_free(&tmp);
1173  }
1174  }
1175  }
1176 
1177  return 0;
1178 
1179 fail:
1180  cleanup_filtergraph(fg);
1181  return ret;
1182 }
1183 
1185 {
1186  av_buffer_unref(&ifilter->hw_frames_ctx);
1187 
1188  ifilter->format = frame->format;
1189 
1190  ifilter->width = frame->width;
1191  ifilter->height = frame->height;
1192  ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1193 
1194  ifilter->sample_rate = frame->sample_rate;
1195  ifilter->channels = frame->channels;
1196  ifilter->channel_layout = frame->channel_layout;
1197 
1198  if (frame->hw_frames_ctx) {
1199  ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1200  if (!ifilter->hw_frames_ctx)
1201  return AVERROR(ENOMEM);
1202  }
1203 
1204  return 0;
1205 }
1206 
1208 {
1209  int i;
1210  for (i = 0; i < fg->nb_inputs; i++)
1211  if (fg->inputs[i]->ist == ist)
1212  return 1;
1213  return 0;
1214 }
1215 
1217 {
1218  return !fg->graph_desc;
1219 }
AVFilterContext ** filters
Definition: avfilter.h:842
void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
Enable or disable automatic format conversion inside the graph.
#define NULL
Definition: coverity.c:32
int width
Definition: ffmpeg.h:270
int keep_pix_fmt
Definition: ffmpeg.h:528
Bytestream IO Context.
Definition: avio.h:161
int64_t recording_time
desired length of the resulting file in microseconds == AV_TIME_BASE units
Definition: ffmpeg.h:558
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
uint8_t * name
Definition: ffmpeg.h:263
int nb_outputs
Definition: ffmpeg.h:292
static const char * format[]
Definition: af_aiir.c:331
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
AVDictionary * swr_opts
Definition: ffmpeg.h:509
#define DECODING_FOR_FILTER
Definition: ffmpeg.h:302
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2498
This structure describes decoded (raw) audio or video data.
Definition: frame.h:268
static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in)
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1420
AVRational frame_rate
Definition: ffmpeg.h:477
HWDevice * filter_hw_device
Definition: ffmpeg_opt.c:81
double get_rotation(AVStream *st)
Definition: cmdutils.c:2175
int accurate_seek
Definition: ffmpeg.h:413
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
AVFilterGraph * avfilter_graph_alloc(void)
Allocate a filter graph.
Definition: avfiltergraph.c:83
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
Main libavfilter public API header.
Memory buffer source API.
const char * desc
Definition: nvenc.c:68
AVRational framerate
Definition: ffmpeg.h:333
int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
Check validity and configure all the links and formats in the graph.
void avfilter_inout_free(AVFilterInOut **inout)
Free the supplied list of AVFilterInOut and set *inout to NULL.
Definition: graphparser.c:203
struct AVFilterInOut * next
next input/input in the list, NULL if this is the last
Definition: avfilter.h:1014
int height
Definition: ffmpeg.h:247
int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
Check if the given stream matches a stream specifier.
Definition: cmdutils.c:2071
AVFilterInOut * out_tmp
Definition: ffmpeg.h:266
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
Get the type of an AVFilterPad.
Definition: avfilter.c:1039
int decoding_needed
Definition: ffmpeg.h:300
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3931
static int insert_trim(int64_t start_time, int64_t duration, AVFilterContext **last_filter, int *pad_idx, const char *filter_name)
void sub2video_update(InputStream *ist, AVSubtitle *sub)
Definition: ffmpeg.c:240
int num
Numerator.
Definition: rational.h:59
static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
int index
stream index in AVFormatContext
Definition: avformat.h:875
int init_complex_filtergraph(FilterGraph *fg)
void avfilter_graph_free(AVFilterGraph **graph)
Free a graph, destroy its links, and set *graph to NULL.
AVBufferRef * hw_device_ctx
For filters which will create hardware frames, sets the device the filter should create them in...
Definition: avfilter.h:394
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1764
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
discard all
Definition: avcodec.h:805
int nb_input_streams
Definition: ffmpeg.c:148
#define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name)
static enum AVPixelFormat * get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
Definition: ffmpeg_filter.c:42
AVCodec.
Definition: avcodec.h:3455
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1391
int64_t start_time
start time in microseconds == AV_TIME_BASE units
Definition: ffmpeg.h:559
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
int index
Definition: ffmpeg.h:283
char * scale_sws_opts
sws options to use for the auto-inserted scale filters
Definition: avfilter.h:845
struct FilterGraph * graph
Definition: ffmpeg.h:238
AVBufferRef * hw_frames_ctx
For hwaccel-format frames, this should be a reference to the AVHWFramesContext describing the frame...
Definition: frame.h:605
Format I/O context.
Definition: avformat.h:1351
AVRational av_guess_frame_rate(AVFormatContext *ctx, AVStream *stream, AVFrame *frame)
Guess the frame rate, based on both the container and codec information.
Definition: utils.c:5079
#define SWS_BILINEAR
Definition: swscale.h:59
int configure_filtergraph(FilterGraph *fg)
memory buffer sink API for audio and video
enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
Definition: ffmpeg_filter.c:63
struct InputStream * ist
Definition: ffmpeg.h:237
char * name
name of this filter instance
Definition: avfilter.h:343
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AVFilterGraph * graph
Definition: ffmpeg.h:286
int av_buffersink_get_sample_rate(const AVFilterContext *ctx)
int avfilter_link(AVFilterContext *src, unsigned srcpad, AVFilterContext *dst, unsigned dstpad)
Link two filters together.
Definition: avfilter.c:135
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:349
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, int clip)
Definition: cfhd.c:153
int user_set_discard
Definition: ffmpeg.h:299
static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in)
static int64_t start_time
Definition: ffplay.c:330
uint8_t
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:189
AVDictionary * sws_dict
Definition: ffmpeg.h:508
int width
Video only.
Definition: avcodec.h:3997
void check_filter_outputs(void)
AVOptions.
#define f(width, name)
Definition: cbs_vp9.c:255
static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
int audio_sync_method
Definition: ffmpeg_opt.c:91
int shortest
Definition: ffmpeg.h:562
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
int64_t duration
Definition: movenc.c:63
static AVFrame * frame
int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt, const char *name, const char *args, void *opaque, AVFilterGraph *graph_ctx)
Create and add a filter instance into an existing graph.
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
enum AVMediaType type
Definition: ffmpeg.h:240
int nb_threads
Maximum number of threads used by filters in this graph.
Definition: avfilter.h:869
AVDictionary * resample_opts
Definition: ffmpeg.h:510
AVFilterContext * filter
Definition: ffmpeg.h:260
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
int nb_input_files
Definition: ffmpeg.c:150
AVCodec * dec
Definition: ffmpeg.h:305
int avfilter_graph_parse2(AVFilterGraph *graph, const char *filters, AVFilterInOut **inputs, AVFilterInOut **outputs)
Add a graph described by a string to a graph.
Definition: graphparser.c:407
int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
int file_index
Definition: ffmpeg.h:296
int av_buffersink_get_h(const AVFilterContext *ctx)
struct InputStream::sub2video sub2video
int av_buffersink_get_format(const AVFilterContext *ctx)
#define av_log(a,...)
int filter_complex_nbthreads
Definition: ffmpeg_opt.c:111
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2617
A filter pad used for either input or output.
Definition: internal.h:54
uint64_t channel_layout
Definition: ffmpeg.h:274
AVFifoBuffer * sub_queue
queue of AVSubtitle* before filter init
Definition: ffmpeg.h:349
static int insert_filter(AVFilterContext **last_filter, int *pad_idx, const char *filter_name, const char *args)
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:345
AVRational sample_aspect_ratio
Definition: ffmpeg.h:248
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
int width
Definition: frame.h:326
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define GET_CH_LAYOUT_NAME(ch_layout)
Definition: cmdutils.h:638
int sample_rate
Definition: ffmpeg.h:250
static AVBufferRef * hw_device_ctx
Definition: hw_decode.c:45
FilterGraph ** filtergraphs
Definition: ffmpeg.c:157
AVFilterContext * filter
Definition: ffmpeg.h:236
#define AVERROR(e)
Definition: error.h:43
int format
Definition: ffmpeg.h:245
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
unsigned nb_outputs
number of output pads
Definition: avfilter.h:351
Display matrix.
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:95
int capabilities
Codec capabilities.
Definition: avcodec.h:3474
int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void(*func)(void *, void *, int))
Feed data from an AVFifoBuffer to a user-supplied callback.
Definition: fifo.c:213
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3927
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1634
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:568
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3462
const char * av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
Definition: samplefmt.c:49
int eof
Definition: ffmpeg.h:256
int format
video: the pixel format, value corresponds to enum AVPixelFormat audio: the sample format...
Definition: buffersrc.h:78
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:118
#define AV_CODEC_CAP_VARIABLE_FRAME_SIZE
Audio encoder supports receiving a different number of samples in each call.
Definition: avcodec.h:1042
static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2261
int filter_nbthreads
Definition: ffmpeg_opt.c:110
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
OutputFilter * filter
Definition: ffmpeg.h:502
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:445
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: allfilters.c:474
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
int channels
number of audio channels, only used for audio.
Definition: frame.h:572
audio channel layout utility functions
enum AVPixelFormat * pix_fmts
array of supported pixel formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3476
This structure contains the parameters describing the frames that will be passed to this filter...
Definition: buffersrc.h:73
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:897
unsigned nb_inputs
number of input pads
Definition: avfilter.h:347
external API header
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
struct OutputStream * ost
Definition: ffmpeg.h:261
int width
picture width / height.
Definition: avcodec.h:1727
uint8_t w
Definition: llviddspenc.c:38
char * apad
Definition: ffmpeg.h:511
AVS_Value args
Definition: avisynth_c.h:699
int width
Definition: ffmpeg.h:247
AVFormatContext * ctx
Definition: movenc.c:48
int nb_filtergraphs
Definition: ffmpeg.c:158
#define s(width, name)
Definition: cbs_vp9.c:257
int audio_channels_mapped
Definition: ffmpeg.h:497
int n
Definition: avisynth_c.h:684
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
enum AVCodecID codec_id
Definition: vaapi_decode.c:364
int height
Definition: ffmpeg.h:270
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
int sample_rate
Definition: ffmpeg.h:273
#define GET_SAMPLE_FMT_NAME(sample_fmt)
Definition: cmdutils.h:631
AVFilterContext * filter_ctx
filter context associated to this input/output
Definition: avfilter.h:1008
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:1139
void exit_program(int ret)
Wraps exit with a program-specific cleanup routine.
Definition: cmdutils.c:136
AVCodecContext * enc
Definition: muxing.c:55
int start_at_zero
Definition: ffmpeg_opt.c:100
int avfilter_init_str(AVFilterContext *filter, const char *args)
Initialize a filter with the supplied parameters.
Definition: avfilter.c:924
int audio_volume
Definition: ffmpeg_opt.c:90
Stream structure.
Definition: avformat.h:874
static char * describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
A linked-list of the inputs/outputs of the filter chain.
Definition: avfilter.h:1003
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:341
InputFilter ** filters
Definition: ffmpeg.h:358
enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
Definition: imgconvert.c:54
#define GET_SAMPLE_RATE_NAME(rate)
Definition: cmdutils.h:634
int64_t recording_time
Definition: ffmpeg.h:408
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2230
all automatic conversions disabled
Definition: avfilter.h:976
AVBufferRef * hw_frames_ctx
Video with a hwaccel pixel format only.
Definition: buffersrc.h:106
AVStream * st
Definition: ffmpeg.h:297
sample_rate
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
#define AV_BPRINT_SIZE_AUTOMATIC
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in)
enum AVMediaType codec_type
Definition: avcodec.h:1562
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
enum AVCodecID codec_id
Definition: avcodec.h:1564
int av_fifo_size(const AVFifoBuffer *f)
Return the amount of data in bytes in the AVFifoBuffer, that is the amount of data you can read from ...
Definition: fifo.c:77
int ist_index
Definition: ffmpeg.h:397
const char * graph_desc
Definition: ffmpeg.h:284
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
uint64_t av_buffersink_get_channel_layout(const AVFilterContext *ctx)
int64_t start_time
Definition: ffmpeg.h:406
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:196
main external API structure.
Definition: avcodec.h:1554
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:357
void avsubtitle_free(AVSubtitle *sub)
Free all allocated data in the given subtitle struct.
Definition: utils.c:1054
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:356
int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
AVCodecContext * enc_ctx
Definition: ffmpeg.h:465
#define AUTO_INSERT_FILTER(opt_name, filter_name, arg)
GLint GLenum type
Definition: opengl_enc.c:105
AVBufferRef * hw_frames_ctx
Definition: ffmpeg.h:254
int channels
Definition: ffmpeg.h:251
int * audio_channels_map
Definition: ffmpeg.h:496
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:113
int sample_rate
Sample rate of the audio data.
Definition: frame.h:440
Filter definition.
Definition: avfilter.h:144
int pad_idx
index of the filt_ctx pad to use for linking
Definition: avfilter.h:1011
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int file_index
Definition: ffmpeg.h:443
AVCodecContext * dec_ctx
Definition: ffmpeg.h:304
AVMediaType
Definition: avutil.h:199
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:101
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:240
const char * name
Filter name.
Definition: avfilter.h:148
int av_buffersink_get_w(const AVFilterContext *ctx)
unsigned nb_filters
Definition: avfilter.h:843
int autorotate
Definition: ffmpeg.h:337
#define snprintf
Definition: snprintf.h:34
const char * avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
Get the name of an AVFilterPad.
Definition: avfilter.c:1034
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
float audio_drift_threshold
Definition: ffmpeg_opt.c:86
char * name
unique name for this input/output in the list
Definition: avfilter.h:1005
int nb_filters
Definition: ffmpeg.h:359
#define SWS_BITEXACT
Definition: swscale.h:84
int64_t start_time
Position of the first frame of the component, in AV_TIME_BASE fractional seconds. ...
Definition: avformat.h:1456
#define AVERROR_FILTER_NOT_FOUND
Filter not found.
Definition: error.h:58
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
A reference to a data buffer.
Definition: buffer.h:81
static AVStream * ost
int reconfiguration
Definition: ffmpeg.h:287
struct FilterGraph * graph
Definition: ffmpeg.h:262
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
sample_rates
void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
Set the frame size for an audio buffer sink.
Definition: buffersink.c:175
int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
Initialize the buffersrc or abuffersrc filter with the provided parameters.
Definition: buffersrc.c:93
AVStream * st
Definition: muxing.c:54
AVBufferRef * device_ref
Definition: ffmpeg.h:77
#define AV_CODEC_CAP_LOSSLESS
Codec is lossless.
Definition: avcodec.h:1060
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
char * key
Definition: dict.h:86
int den
Denominator.
Definition: rational.h:60
uint64_t channel_layout
Definition: ffmpeg.h:252
int copy_ts
Definition: ffmpeg_opt.c:99
AVFormatContext * ctx
Definition: ffmpeg.h:394
#define AVERROR_DECODER_NOT_FOUND
Decoder not found.
Definition: error.h:52
int do_deinterlace
Definition: ffmpeg_opt.c:94
#define GROW_ARRAY(array, nb_elems)
Definition: cmdutils.h:622
pixel format definitions
char * avfilter
Definition: ffmpeg.h:503
uint8_t * name
Definition: ffmpeg.h:239
char * value
Definition: dict.h:87
AVFifoBuffer * av_fifo_alloc(unsigned int size)
Initialize an AVFifoBuffer.
Definition: fifo.c:43
int len
AVFilterContext * avfilter_graph_alloc_filter(AVFilterGraph *graph, const AVFilter *filter, const char *name)
Create a new filter instance in a filter graph.
int channels
number of audio channels
Definition: avcodec.h:2211
OutputFilter ** outputs
Definition: ffmpeg.h:291
InputFile ** input_files
Definition: ffmpeg.c:149
AVBufferSrcParameters * av_buffersrc_parameters_alloc(void)
Allocate a new AVBufferSrcParameters instance.
Definition: buffersrc.c:82
AVFormatContext * ctx
Definition: ffmpeg.h:555
int filtergraph_is_simple(FilterGraph *fg)
An instance of a filter.
Definition: avfilter.h:338
static char * choose_pix_fmts(OutputFilter *ofilter)
static void cleanup_filtergraph(FilterGraph *fg)
AVDictionary * encoder_opts
Definition: ffmpeg.h:507
int64_t av_get_default_channel_layout(int nb_channels)
Return default channel layout for a given number of channels.
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
int height
Definition: frame.h:326
FILE * out
Definition: movenc.c:54
InputFilter ** inputs
Definition: ffmpeg.h:289
#define av_freep(p)
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
OutputFile ** output_files
Definition: ffmpeg.c:154
#define AV_LOG_FATAL
Something went wrong and recovery is not possible.
Definition: log.h:170
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
enum AVSampleFormat * sample_fmts
array of supported sample formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3478
int format
Definition: ffmpeg.h:272
formats
Definition: signature.h:48
int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
int discard
Definition: ffmpeg.h:298
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2414
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:903
void choose_sample_fmt(AVStream *st, AVCodec *codec)
Definition: ffmpeg_filter.c:93
int nb_inputs
Definition: ffmpeg.h:290
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:929
int index
Definition: ffmpeg.h:444
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
enum AVMediaType type
Definition: ffmpeg.h:267
AVFifoBuffer * frame_queue
Definition: ffmpeg.h:242
#define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg)
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:449
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2613
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define tb
Definition: regdef.h:68
int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame)
Add a frame to the buffer source.
Definition: buffersrc.c:144
InputStream ** input_streams
Definition: ffmpeg.c:147
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
discard nothing
Definition: avcodec.h:799
const char * name
Definition: opengl_enc.c:103
static uint8_t tmp[11]
Definition: aes_ctr.c:26