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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  int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
69  enum AVPixelFormat best= AV_PIX_FMT_NONE;
70 
73  }
74  for (; *p != AV_PIX_FMT_NONE; p++) {
75  best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
76  if (*p == target)
77  break;
78  }
79  if (*p == AV_PIX_FMT_NONE) {
80  if (target != AV_PIX_FMT_NONE)
82  "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
83  av_get_pix_fmt_name(target),
84  codec->name,
85  av_get_pix_fmt_name(best));
86  return best;
87  }
88  }
89  return target;
90 }
91 
93 {
94  if (codec && codec->sample_fmts) {
95  const enum AVSampleFormat *p = codec->sample_fmts;
96  for (; *p != -1; p++) {
97  if (*p == st->codecpar->format)
98  break;
99  }
100  if (*p == -1) {
102  av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
105  "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
107  codec->name,
109  st->codecpar->format = codec->sample_fmts[0];
110  }
111  }
112 }
113 
114 static char *choose_pix_fmts(OutputFilter *ofilter)
115 {
116  OutputStream *ost = ofilter->ost;
117  AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
118  if (strict_dict)
119  // used by choose_pixel_fmt() and below
120  av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
121 
122  if (ost->keep_pix_fmt) {
125  if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
126  return NULL;
128  }
129  if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
130  return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
131  } else if (ost->enc && ost->enc->pix_fmts) {
132  const enum AVPixelFormat *p;
133  AVIOContext *s = NULL;
134  uint8_t *ret;
135  int len;
136 
137  if (avio_open_dyn_buf(&s) < 0)
138  exit_program(1);
139 
140  p = ost->enc->pix_fmts;
143  }
144 
145  for (; *p != AV_PIX_FMT_NONE; p++) {
146  const char *name = av_get_pix_fmt_name(*p);
147  avio_printf(s, "%s|", name);
148  }
149  len = avio_close_dyn_buf(s, &ret);
150  ret[len - 1] = 0;
151  return ret;
152  } else
153  return NULL;
154 }
155 
156 /* Define a function for building a string containing a list of
157  * allowed formats. */
158 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name) \
159 static char *choose_ ## suffix (OutputFilter *ofilter) \
160 { \
161  if (ofilter->var != none) { \
162  get_name(ofilter->var); \
163  return av_strdup(name); \
164  } else if (ofilter->supported_list) { \
165  const type *p; \
166  AVIOContext *s = NULL; \
167  uint8_t *ret; \
168  int len; \
169  \
170  if (avio_open_dyn_buf(&s) < 0) \
171  exit_program(1); \
172  \
173  for (p = ofilter->supported_list; *p != none; p++) { \
174  get_name(*p); \
175  avio_printf(s, "%s|", name); \
176  } \
177  len = avio_close_dyn_buf(s, &ret); \
178  ret[len - 1] = 0; \
179  return ret; \
180  } else \
181  return NULL; \
182 }
183 
184 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
185 // GET_PIX_FMT_NAME)
186 
189 
192 
193 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
195 
197 {
198  FilterGraph *fg = av_mallocz(sizeof(*fg));
199 
200  if (!fg)
201  exit_program(1);
202  fg->index = nb_filtergraphs;
203 
204  GROW_ARRAY(fg->outputs, fg->nb_outputs);
205  if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
206  exit_program(1);
207  fg->outputs[0]->ost = ost;
208  fg->outputs[0]->graph = fg;
209  fg->outputs[0]->format = -1;
210 
211  ost->filter = fg->outputs[0];
212 
213  GROW_ARRAY(fg->inputs, fg->nb_inputs);
214  if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
215  exit_program(1);
216  fg->inputs[0]->ist = ist;
217  fg->inputs[0]->graph = fg;
218  fg->inputs[0]->format = -1;
219 
220  fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
221  if (!fg->inputs[0]->frame_queue)
222  exit_program(1);
223 
224  GROW_ARRAY(ist->filters, ist->nb_filters);
225  ist->filters[ist->nb_filters - 1] = fg->inputs[0];
226 
228  filtergraphs[nb_filtergraphs - 1] = fg;
229 
230  return 0;
231 }
232 
233 static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
234 {
235  AVFilterContext *ctx = inout->filter_ctx;
236  AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads;
237  int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs;
238  AVIOContext *pb;
239  uint8_t *res = NULL;
240 
241  if (avio_open_dyn_buf(&pb) < 0)
242  exit_program(1);
243 
244  avio_printf(pb, "%s", ctx->filter->name);
245  if (nb_pads > 1)
246  avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));
247  avio_w8(pb, 0);
248  avio_close_dyn_buf(pb, &res);
249  return res;
250 }
251 
253 {
254  InputStream *ist = NULL;
256  int i;
257 
258  // TODO: support other filter types
259  if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
260  av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
261  "currently.\n");
262  exit_program(1);
263  }
264 
265  if (in->name) {
267  AVStream *st = NULL;
268  char *p;
269  int file_idx = strtol(in->name, &p, 0);
270 
271  if (file_idx < 0 || file_idx >= nb_input_files) {
272  av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
273  file_idx, fg->graph_desc);
274  exit_program(1);
275  }
276  s = input_files[file_idx]->ctx;
277 
278  for (i = 0; i < s->nb_streams; i++) {
279  enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
280  if (stream_type != type &&
281  !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
282  type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
283  continue;
284  if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
285  st = s->streams[i];
286  break;
287  }
288  }
289  if (!st) {
290  av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
291  "matches no streams.\n", p, fg->graph_desc);
292  exit_program(1);
293  }
294  ist = input_streams[input_files[file_idx]->ist_index + st->index];
295  } else {
296  /* find the first unused stream of corresponding type */
297  for (i = 0; i < nb_input_streams; i++) {
298  ist = input_streams[i];
299  if (ist->dec_ctx->codec_type == type && ist->discard)
300  break;
301  }
302  if (i == nb_input_streams) {
303  av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
304  "unlabeled input pad %d on filter %s\n", in->pad_idx,
305  in->filter_ctx->name);
306  exit_program(1);
307  }
308  }
309  av_assert0(ist);
310 
311  ist->discard = 0;
313  ist->st->discard = AVDISCARD_NONE;
314 
315  GROW_ARRAY(fg->inputs, fg->nb_inputs);
316  if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
317  exit_program(1);
318  fg->inputs[fg->nb_inputs - 1]->ist = ist;
319  fg->inputs[fg->nb_inputs - 1]->graph = fg;
320  fg->inputs[fg->nb_inputs - 1]->format = -1;
321  fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
322  fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
323 
324  fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
325  if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
326  exit_program(1);
327 
328  GROW_ARRAY(ist->filters, ist->nb_filters);
329  ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
330 }
331 
333 {
334  AVFilterInOut *inputs, *outputs, *cur;
335  AVFilterGraph *graph;
336  int ret = 0;
337 
338  /* this graph is only used for determining the kinds of inputs
339  * and outputs we have, and is discarded on exit from this function */
340  graph = avfilter_graph_alloc();
341  if (!graph)
342  return AVERROR(ENOMEM);
343 
344  ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
345  if (ret < 0)
346  goto fail;
347 
348  for (cur = inputs; cur; cur = cur->next)
349  init_input_filter(fg, cur);
350 
351  for (cur = outputs; cur;) {
352  GROW_ARRAY(fg->outputs, fg->nb_outputs);
353  fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
354  if (!fg->outputs[fg->nb_outputs - 1])
355  exit_program(1);
356 
357  fg->outputs[fg->nb_outputs - 1]->graph = fg;
358  fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
360  cur->pad_idx);
361  fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
362  cur = cur->next;
363  fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
364  }
365 
366 fail:
367  avfilter_inout_free(&inputs);
368  avfilter_graph_free(&graph);
369  return ret;
370 }
371 
372 static int insert_trim(int64_t start_time, int64_t duration,
373  AVFilterContext **last_filter, int *pad_idx,
374  const char *filter_name)
375 {
376  AVFilterGraph *graph = (*last_filter)->graph;
378  const AVFilter *trim;
379  enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
380  const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
381  int ret = 0;
382 
383  if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
384  return 0;
385 
386  trim = avfilter_get_by_name(name);
387  if (!trim) {
388  av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
389  "recording time.\n", name);
391  }
392 
393  ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
394  if (!ctx)
395  return AVERROR(ENOMEM);
396 
397  if (duration != INT64_MAX) {
398  ret = av_opt_set_int(ctx, "durationi", duration,
400  }
401  if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
402  ret = av_opt_set_int(ctx, "starti", start_time,
404  }
405  if (ret < 0) {
406  av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
407  return ret;
408  }
409 
410  ret = avfilter_init_str(ctx, NULL);
411  if (ret < 0)
412  return ret;
413 
414  ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
415  if (ret < 0)
416  return ret;
417 
418  *last_filter = ctx;
419  *pad_idx = 0;
420  return 0;
421 }
422 
423 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
424  const char *filter_name, const char *args)
425 {
426  AVFilterGraph *graph = (*last_filter)->graph;
428  int ret;
429 
430  ret = avfilter_graph_create_filter(&ctx,
431  avfilter_get_by_name(filter_name),
432  filter_name, args, NULL, graph);
433  if (ret < 0)
434  return ret;
435 
436  ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
437  if (ret < 0)
438  return ret;
439 
440  *last_filter = ctx;
441  *pad_idx = 0;
442  return 0;
443 }
444 
446 {
447  char *pix_fmts;
448  OutputStream *ost = ofilter->ost;
449  OutputFile *of = output_files[ost->file_index];
451  int pad_idx = out->pad_idx;
452  int ret;
453  char name[255];
454 
455  snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
456  ret = avfilter_graph_create_filter(&ofilter->filter,
457  avfilter_get_by_name("buffersink"),
458  name, NULL, NULL, fg->graph);
459 
460  if (ret < 0)
461  return ret;
462 
463  if (ofilter->width || ofilter->height) {
464  char args[255];
466  AVDictionaryEntry *e = NULL;
467 
468  snprintf(args, sizeof(args), "%d:%d",
469  ofilter->width, ofilter->height);
470 
471  while ((e = av_dict_get(ost->sws_dict, "", e,
473  av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
474  }
475 
476  snprintf(name, sizeof(name), "scaler_out_%d_%d",
477  ost->file_index, ost->index);
478  if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
479  name, args, NULL, fg->graph)) < 0)
480  return ret;
481  if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
482  return ret;
483 
484  last_filter = filter;
485  pad_idx = 0;
486  }
487 
488  if ((pix_fmts = choose_pix_fmts(ofilter))) {
490  snprintf(name, sizeof(name), "format_out_%d_%d",
491  ost->file_index, ost->index);
492  ret = avfilter_graph_create_filter(&filter,
493  avfilter_get_by_name("format"),
494  "format", pix_fmts, NULL, fg->graph);
495  av_freep(&pix_fmts);
496  if (ret < 0)
497  return ret;
498  if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
499  return ret;
500 
501  last_filter = filter;
502  pad_idx = 0;
503  }
504 
505  if (ost->frame_rate.num && 0) {
506  AVFilterContext *fps;
507  char args[255];
508 
509  snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
510  ost->frame_rate.den);
511  snprintf(name, sizeof(name), "fps_out_%d_%d",
512  ost->file_index, ost->index);
514  name, args, NULL, fg->graph);
515  if (ret < 0)
516  return ret;
517 
518  ret = avfilter_link(last_filter, pad_idx, fps, 0);
519  if (ret < 0)
520  return ret;
521  last_filter = fps;
522  pad_idx = 0;
523  }
524 
525  snprintf(name, sizeof(name), "trim_out_%d_%d",
526  ost->file_index, ost->index);
527  ret = insert_trim(of->start_time, of->recording_time,
528  &last_filter, &pad_idx, name);
529  if (ret < 0)
530  return ret;
531 
532 
533  if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
534  return ret;
535 
536  return 0;
537 }
538 
540 {
541  OutputStream *ost = ofilter->ost;
542  OutputFile *of = output_files[ost->file_index];
543  AVCodecContext *codec = ost->enc_ctx;
545  int pad_idx = out->pad_idx;
547  char name[255];
548  int ret;
549 
550  snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
551  ret = avfilter_graph_create_filter(&ofilter->filter,
552  avfilter_get_by_name("abuffersink"),
553  name, NULL, NULL, fg->graph);
554  if (ret < 0)
555  return ret;
556  if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
557  return ret;
558 
559 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
560  AVFilterContext *filt_ctx; \
561  \
562  av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
563  "similarly to -af " filter_name "=%s.\n", arg); \
564  \
565  ret = avfilter_graph_create_filter(&filt_ctx, \
566  avfilter_get_by_name(filter_name), \
567  filter_name, arg, NULL, fg->graph); \
568  if (ret < 0) \
569  return ret; \
570  \
571  ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
572  if (ret < 0) \
573  return ret; \
574  \
575  last_filter = filt_ctx; \
576  pad_idx = 0; \
577 } while (0)
578  if (ost->audio_channels_mapped) {
579  int i;
580  AVBPrint pan_buf;
581  av_bprint_init(&pan_buf, 256, 8192);
582  av_bprintf(&pan_buf, "0x%"PRIx64,
584  for (i = 0; i < ost->audio_channels_mapped; i++)
585  if (ost->audio_channels_map[i] != -1)
586  av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
587 
588  AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
589  av_bprint_finalize(&pan_buf, NULL);
590  }
591 
592  if (codec->channels && !codec->channel_layout)
594 
595  sample_fmts = choose_sample_fmts(ofilter);
596  sample_rates = choose_sample_rates(ofilter);
597  channel_layouts = choose_channel_layouts(ofilter);
598  if (sample_fmts || sample_rates || channel_layouts) {
600  char args[256];
601  args[0] = 0;
602 
603  if (sample_fmts)
604  av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
605  sample_fmts);
606  if (sample_rates)
607  av_strlcatf(args, sizeof(args), "sample_rates=%s:",
608  sample_rates);
609  if (channel_layouts)
610  av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
611  channel_layouts);
612 
613  av_freep(&sample_fmts);
614  av_freep(&sample_rates);
615  av_freep(&channel_layouts);
616 
617  snprintf(name, sizeof(name), "format_out_%d_%d",
618  ost->file_index, ost->index);
619  ret = avfilter_graph_create_filter(&format,
620  avfilter_get_by_name("aformat"),
621  name, args, NULL, fg->graph);
622  if (ret < 0)
623  return ret;
624 
625  ret = avfilter_link(last_filter, pad_idx, format, 0);
626  if (ret < 0)
627  return ret;
628 
629  last_filter = format;
630  pad_idx = 0;
631  }
632 
633  if (audio_volume != 256 && 0) {
634  char args[256];
635 
636  snprintf(args, sizeof(args), "%f", audio_volume / 256.);
637  AUTO_INSERT_FILTER("-vol", "volume", args);
638  }
639 
640  if (ost->apad && of->shortest) {
641  char args[256];
642  int i;
643 
644  for (i=0; i<of->ctx->nb_streams; i++)
646  break;
647 
648  if (i<of->ctx->nb_streams) {
649  snprintf(args, sizeof(args), "%s", ost->apad);
650  AUTO_INSERT_FILTER("-apad", "apad", args);
651  }
652  }
653 
654  snprintf(name, sizeof(name), "trim for output stream %d:%d",
655  ost->file_index, ost->index);
656  ret = insert_trim(of->start_time, of->recording_time,
657  &last_filter, &pad_idx, name);
658  if (ret < 0)
659  return ret;
660 
661  if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
662  return ret;
663 
664  return 0;
665 }
666 
668 {
669  if (!ofilter->ost) {
670  av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
671  exit_program(1);
672  }
673 
674  switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
675  case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
676  case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
677  default: av_assert0(0);
678  }
679 }
680 
682 {
683  int i;
684  for (i = 0; i < nb_filtergraphs; i++) {
685  int n;
686  for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
687  OutputFilter *output = filtergraphs[i]->outputs[n];
688  if (!output->ost) {
689  av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
690  exit_program(1);
691  }
692  }
693  }
694 }
695 
696 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
697 {
699  int i, w, h;
700 
701  /* Compute the size of the canvas for the subtitles stream.
702  If the subtitles codecpar has set a size, use it. Otherwise use the
703  maximum dimensions of the video streams in the same file. */
704  w = ifilter->width;
705  h = ifilter->height;
706  if (!(w && h)) {
707  for (i = 0; i < avf->nb_streams; i++) {
708  if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
709  w = FFMAX(w, avf->streams[i]->codecpar->width);
710  h = FFMAX(h, avf->streams[i]->codecpar->height);
711  }
712  }
713  if (!(w && h)) {
714  w = FFMAX(w, 720);
715  h = FFMAX(h, 576);
716  }
717  av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
718  }
719  ist->sub2video.w = ifilter->width = w;
720  ist->sub2video.h = ifilter->height = h;
721 
722  ifilter->width = ist->dec_ctx->width ? ist->dec_ctx->width : ist->sub2video.w;
723  ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
724 
725  /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
726  palettes for all rectangles are identical or compatible */
727  ifilter->format = AV_PIX_FMT_RGB32;
728 
729  ist->sub2video.frame = av_frame_alloc();
730  if (!ist->sub2video.frame)
731  return AVERROR(ENOMEM);
732  ist->sub2video.last_pts = INT64_MIN;
733  return 0;
734 }
735 
737  AVFilterInOut *in)
738 {
740  const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
741  InputStream *ist = ifilter->ist;
742  InputFile *f = input_files[ist->file_index];
743  AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
744  ist->st->time_base;
745  AVRational fr = ist->framerate;
746  AVRational sar;
747  AVBPrint args;
748  char name[255];
749  int ret, pad_idx = 0;
750  int64_t tsoffset = 0;
752 
753  if (!par)
754  return AVERROR(ENOMEM);
755  memset(par, 0, sizeof(*par));
756  par->format = AV_PIX_FMT_NONE;
757 
758  if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
759  av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
760  ret = AVERROR(EINVAL);
761  goto fail;
762  }
763 
764  if (!fr.num)
765  fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
766 
768  ret = sub2video_prepare(ist, ifilter);
769  if (ret < 0)
770  goto fail;
771  }
772 
773  sar = ifilter->sample_aspect_ratio;
774  if(!sar.den)
775  sar = (AVRational){0,1};
776  av_bprint_init(&args, 0, 1);
777  av_bprintf(&args,
778  "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
779  "pixel_aspect=%d/%d:sws_param=flags=%d",
780  ifilter->width, ifilter->height, ifilter->format,
781  tb.num, tb.den, sar.num, sar.den,
783  if (fr.num && fr.den)
784  av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
785  snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
786  ist->file_index, ist->st->index);
787 
788 
789  if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
790  args.str, NULL, fg->graph)) < 0)
791  goto fail;
792  par->hw_frames_ctx = ifilter->hw_frames_ctx;
793  ret = av_buffersrc_parameters_set(ifilter->filter, par);
794  if (ret < 0)
795  goto fail;
796  av_freep(&par);
797  last_filter = ifilter->filter;
798 
799  if (ist->autorotate) {
800  double theta = get_rotation(ist->st);
801 
802  if (fabs(theta - 90) < 1.0) {
803  ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
804  } else if (fabs(theta - 180) < 1.0) {
805  ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
806  if (ret < 0)
807  return ret;
808  ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
809  } else if (fabs(theta - 270) < 1.0) {
810  ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
811  } else if (fabs(theta) > 1.0) {
812  char rotate_buf[64];
813  snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
814  ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
815  }
816  if (ret < 0)
817  return ret;
818  }
819 
820  if (do_deinterlace) {
821  AVFilterContext *yadif;
822 
823  snprintf(name, sizeof(name), "deinterlace_in_%d_%d",
824  ist->file_index, ist->st->index);
825  if ((ret = avfilter_graph_create_filter(&yadif,
826  avfilter_get_by_name("yadif"),
827  name, "", NULL,
828  fg->graph)) < 0)
829  return ret;
830 
831  if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
832  return ret;
833 
834  last_filter = yadif;
835  }
836 
837  snprintf(name, sizeof(name), "trim_in_%d_%d",
838  ist->file_index, ist->st->index);
839  if (copy_ts) {
840  tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
842  tsoffset += f->ctx->start_time;
843  }
844  ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
845  AV_NOPTS_VALUE : tsoffset, f->recording_time,
846  &last_filter, &pad_idx, name);
847  if (ret < 0)
848  return ret;
849 
850  if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
851  return ret;
852  return 0;
853 fail:
854  av_freep(&par);
855 
856  return ret;
857 }
858 
860  AVFilterInOut *in)
861 {
863  const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
864  InputStream *ist = ifilter->ist;
865  InputFile *f = input_files[ist->file_index];
866  AVBPrint args;
867  char name[255];
868  int ret, pad_idx = 0;
869  int64_t tsoffset = 0;
870 
871  if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
872  av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
873  return AVERROR(EINVAL);
874  }
875 
877  av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
878  1, ifilter->sample_rate,
879  ifilter->sample_rate,
880  av_get_sample_fmt_name(ifilter->format));
881  if (ifilter->channel_layout)
882  av_bprintf(&args, ":channel_layout=0x%"PRIx64,
883  ifilter->channel_layout);
884  else
885  av_bprintf(&args, ":channels=%d", ifilter->channels);
886  snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
887  ist->file_index, ist->st->index);
888 
889  if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
890  name, args.str, NULL,
891  fg->graph)) < 0)
892  return ret;
893  last_filter = ifilter->filter;
894 
895 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
896  AVFilterContext *filt_ctx; \
897  \
898  av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
899  "similarly to -af " filter_name "=%s.\n", arg); \
900  \
901  snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d", \
902  fg->index, filter_name, ist->file_index, ist->st->index); \
903  ret = avfilter_graph_create_filter(&filt_ctx, \
904  avfilter_get_by_name(filter_name), \
905  name, arg, NULL, fg->graph); \
906  if (ret < 0) \
907  return ret; \
908  \
909  ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
910  if (ret < 0) \
911  return ret; \
912  \
913  last_filter = filt_ctx; \
914 } while (0)
915 
916  if (audio_sync_method > 0) {
917  char args[256] = {0};
918 
919  av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
920  if (audio_drift_threshold != 0.1)
921  av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
922  if (!fg->reconfiguration)
923  av_strlcatf(args, sizeof(args), ":first_pts=0");
924  AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
925  }
926 
927 // if (ost->audio_channels_mapped) {
928 // int i;
929 // AVBPrint pan_buf;
930 // av_bprint_init(&pan_buf, 256, 8192);
931 // av_bprintf(&pan_buf, "0x%"PRIx64,
932 // av_get_default_channel_layout(ost->audio_channels_mapped));
933 // for (i = 0; i < ost->audio_channels_mapped; i++)
934 // if (ost->audio_channels_map[i] != -1)
935 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
936 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
937 // av_bprint_finalize(&pan_buf, NULL);
938 // }
939 
940  if (audio_volume != 256) {
941  char args[256];
942 
943  av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
944  "audio filter instead.\n");
945 
946  snprintf(args, sizeof(args), "%f", audio_volume / 256.);
947  AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
948  }
949 
950  snprintf(name, sizeof(name), "trim for input stream %d:%d",
951  ist->file_index, ist->st->index);
952  if (copy_ts) {
953  tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
955  tsoffset += f->ctx->start_time;
956  }
957  ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
958  AV_NOPTS_VALUE : tsoffset, f->recording_time,
959  &last_filter, &pad_idx, name);
960  if (ret < 0)
961  return ret;
962 
963  if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
964  return ret;
965 
966  return 0;
967 }
968 
970  AVFilterInOut *in)
971 {
972  if (!ifilter->ist->dec) {
974  "No decoder for stream #%d:%d, filtering impossible\n",
975  ifilter->ist->file_index, ifilter->ist->st->index);
977  }
978  switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
979  case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
980  case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
981  default: av_assert0(0);
982  }
983 }
984 
986 {
987  int i;
988  for (i = 0; i < fg->nb_outputs; i++)
989  fg->outputs[i]->filter = (AVFilterContext *)NULL;
990  for (i = 0; i < fg->nb_inputs; i++)
991  fg->inputs[i]->filter = (AVFilterContext *)NULL;
993 }
994 
996 {
997  AVFilterInOut *inputs, *outputs, *cur;
998  int ret, i, simple = filtergraph_is_simple(fg);
999  const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1000  fg->graph_desc;
1001 
1002  cleanup_filtergraph(fg);
1003  if (!(fg->graph = avfilter_graph_alloc()))
1004  return AVERROR(ENOMEM);
1005 
1006  if (simple) {
1007  OutputStream *ost = fg->outputs[0]->ost;
1008  char args[512];
1009  AVDictionaryEntry *e = NULL;
1010 
1012 
1013  args[0] = 0;
1014  while ((e = av_dict_get(ost->sws_dict, "", e,
1016  av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1017  }
1018  if (strlen(args))
1019  args[strlen(args)-1] = 0;
1020  fg->graph->scale_sws_opts = av_strdup(args);
1021 
1022  args[0] = 0;
1023  while ((e = av_dict_get(ost->swr_opts, "", 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  av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1030 
1031  args[0] = '\0';
1032  while ((e = av_dict_get(fg->outputs[0]->ost->resample_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 
1039  e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1040  if (e)
1041  av_opt_set(fg->graph, "threads", e->value, 0);
1042  } else {
1044  }
1045 
1046  if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1047  goto fail;
1048 
1051  : hw_device_ctx;
1052  for (i = 0; i < fg->graph->nb_filters; i++) {
1053  fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(device);
1054  if (!fg->graph->filters[i]->hw_device_ctx) {
1055  ret = AVERROR(ENOMEM);
1056  goto fail;
1057  }
1058  }
1059  }
1060 
1061  if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1062  const char *num_inputs;
1063  const char *num_outputs;
1064  if (!outputs) {
1065  num_outputs = "0";
1066  } else if (outputs->next) {
1067  num_outputs = ">1";
1068  } else {
1069  num_outputs = "1";
1070  }
1071  if (!inputs) {
1072  num_inputs = "0";
1073  } else if (inputs->next) {
1074  num_inputs = ">1";
1075  } else {
1076  num_inputs = "1";
1077  }
1078  av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1079  "to have exactly 1 input and 1 output."
1080  " However, it had %s input(s) and %s output(s)."
1081  " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1082  graph_desc, num_inputs, num_outputs);
1083  ret = AVERROR(EINVAL);
1084  goto fail;
1085  }
1086 
1087  for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1088  if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1089  avfilter_inout_free(&inputs);
1090  avfilter_inout_free(&outputs);
1091  goto fail;
1092  }
1093  avfilter_inout_free(&inputs);
1094 
1095  for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1096  configure_output_filter(fg, fg->outputs[i], cur);
1097  avfilter_inout_free(&outputs);
1098 
1099  if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1100  goto fail;
1101 
1102  /* limit the lists of allowed formats to the ones selected, to
1103  * make sure they stay the same if the filtergraph is reconfigured later */
1104  for (i = 0; i < fg->nb_outputs; i++) {
1105  OutputFilter *ofilter = fg->outputs[i];
1106  AVFilterContext *sink = ofilter->filter;
1107 
1108  ofilter->format = av_buffersink_get_format(sink);
1109 
1110  ofilter->width = av_buffersink_get_w(sink);
1111  ofilter->height = av_buffersink_get_h(sink);
1112 
1113  ofilter->sample_rate = av_buffersink_get_sample_rate(sink);
1115  }
1116 
1117  fg->reconfiguration = 1;
1118 
1119  for (i = 0; i < fg->nb_outputs; i++) {
1120  OutputStream *ost = fg->outputs[i]->ost;
1121  if (!ost->enc) {
1122  /* identical to the same check in ffmpeg.c, needed because
1123  complex filter graphs are initialized earlier */
1124  av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1125  avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1126  ret = AVERROR(EINVAL);
1127  goto fail;
1128  }
1129  if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1130  !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1132  ost->enc_ctx->frame_size);
1133  }
1134 
1135  for (i = 0; i < fg->nb_inputs; i++) {
1136  while (av_fifo_size(fg->inputs[i]->frame_queue)) {
1137  AVFrame *tmp;
1138  av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
1139  ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
1140  av_frame_free(&tmp);
1141  if (ret < 0)
1142  goto fail;
1143  }
1144  }
1145 
1146  /* send the EOFs for the finished inputs */
1147  for (i = 0; i < fg->nb_inputs; i++) {
1148  if (fg->inputs[i]->eof) {
1149  ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
1150  if (ret < 0)
1151  goto fail;
1152  }
1153  }
1154 
1155  /* process queued up subtitle packets */
1156  for (i = 0; i < fg->nb_inputs; i++) {
1157  InputStream *ist = fg->inputs[i]->ist;
1158  if (ist->sub2video.sub_queue && ist->sub2video.frame) {
1159  while (av_fifo_size(ist->sub2video.sub_queue)) {
1160  AVSubtitle tmp;
1161  av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
1162  sub2video_update(ist, &tmp);
1163  avsubtitle_free(&tmp);
1164  }
1165  }
1166  }
1167 
1168  return 0;
1169 
1170 fail:
1171  cleanup_filtergraph(fg);
1172  return ret;
1173 }
1174 
1176 {
1177  av_buffer_unref(&ifilter->hw_frames_ctx);
1178 
1179  ifilter->format = frame->format;
1180 
1181  ifilter->width = frame->width;
1182  ifilter->height = frame->height;
1183  ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1184 
1185  ifilter->sample_rate = frame->sample_rate;
1186  ifilter->channels = frame->channels;
1187  ifilter->channel_layout = frame->channel_layout;
1188 
1189  if (frame->hw_frames_ctx) {
1190  ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1191  if (!ifilter->hw_frames_ctx)
1192  return AVERROR(ENOMEM);
1193  }
1194 
1195  return 0;
1196 }
1197 
1199 {
1200  int i;
1201  for (i = 0; i < fg->nb_inputs; i++)
1202  if (fg->inputs[i]->ist == ist)
1203  return 1;
1204  return 0;
1205 }
1206 
1208 {
1209  return !fg->graph_desc;
1210 }
AVFilterContext ** filters
Definition: avfilter.h:857
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:277
int keep_pix_fmt
Definition: ffmpeg.h:534
const char * s
Definition: avisynth_c.h:768
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:567
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
uint8_t * name
Definition: ffmpeg.h:270
int nb_outputs
Definition: ffmpeg.h:299
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:515
#define DECODING_FOR_FILTER
Definition: ffmpeg.h:309
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2419
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
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:1342
AVRational frame_rate
Definition: ffmpeg.h:484
HWDevice * filter_hw_device
Definition: ffmpeg_opt.c:105
double get_rotation(AVStream *st)
Definition: cmdutils.c:2098
int accurate_seek
Definition: ffmpeg.h:420
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
misc image utilities
AVFilterGraph * avfilter_graph_alloc(void)
Allocate a filter graph.
Definition: avfiltergraph.c:80
#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:60
AVRational framerate
Definition: ffmpeg.h:340
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:1043
int height
Definition: ffmpeg.h:254
int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
Check if the given stream matches a stream specifier.
Definition: cmdutils.c:1994
AVFilterInOut * out_tmp
Definition: ffmpeg.h:273
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
Get the type of an AVFilterPad.
Definition: avfilter.c:1110
int decoding_needed
Definition: ffmpeg.h:307
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4143
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:232
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:890
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:1982
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
int nb_input_streams
Definition: ffmpeg.c:145
#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:3730
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1313
int64_t start_time
start time in microseconds == AV_TIME_BASE units
Definition: ffmpeg.h:568
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
int index
Definition: ffmpeg.h:290
char * scale_sws_opts
sws options to use for the auto-inserted scale filters
Definition: avfilter.h:860
struct FilterGraph * graph
Definition: ffmpeg.h:245
AVBufferRef * hw_frames_ctx
For hwaccel-format frames, this should be a reference to the AVHWFramesContext describing the frame...
Definition: frame.h:538
Format I/O context.
Definition: avformat.h:1349
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:4938
#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:244
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
static AVFilter ** last_filter
Definition: avfilter.c:577
AVFilterGraph * graph
Definition: ffmpeg.h:293
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 int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in)
static int64_t start_time
Definition: ffplay.c:327
uint8_t
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:150
AVDictionary * sws_dict
Definition: ffmpeg.h:514
int width
Video only.
Definition: avcodec.h:4209
void check_filter_outputs(void)
AVOptions.
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:115
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, uint8_t clip)
Definition: cfhd.c:80
int shortest
Definition: ffmpeg.h:571
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1417
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:247
int nb_threads
Maximum number of threads used by filters in this graph.
Definition: avfilter.h:884
AVDictionary * resample_opts
Definition: ffmpeg.h:516
AVFilterContext * filter
Definition: ffmpeg.h:267
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:75
int nb_input_files
Definition: ffmpeg.c:147
AVCodec * dec
Definition: ffmpeg.h:312
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:303
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:135
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2977
A filter pad used for either input or output.
Definition: internal.h:54
uint64_t channel_layout
Definition: ffmpeg.h:281
AVFifoBuffer * sub_queue
queue of AVSubtitle* before filter init
Definition: ffmpeg.h:356
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:255
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:214
int width
Definition: frame.h:259
#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:652
int sample_rate
Definition: ffmpeg.h:257
static AVBufferRef * hw_device_ctx
Definition: hw_decode.c:43
FilterGraph ** filtergraphs
Definition: ffmpeg.c:154
AVFilterContext * filter
Definition: ffmpeg.h:243
#define AVERROR(e)
Definition: error.h:43
int format
Definition: ffmpeg.h:252
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
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:96
int capabilities
Codec capabilities.
Definition: avcodec.h:3749
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:4139
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1849
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:558
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3737
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:263
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:109
#define AV_CODEC_CAP_VARIABLE_FRAME_SIZE
Audio encoder supports receiving a different number of samples in each call.
Definition: avcodec.h:1081
static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2567
int filter_nbthreads
Definition: ffmpeg_opt.c:134
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
OutputFilter * filter
Definition: ffmpeg.h:508
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:379
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: avfilter.c:582
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1405
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:506
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:3751
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:929
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:74
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:557
struct OutputStream * ost
Definition: ffmpeg.h:268
int width
picture width / height.
Definition: avcodec.h:1941
char * apad
Definition: ffmpeg.h:517
AVS_Value args
Definition: avisynth_c.h:699
int width
Definition: ffmpeg.h:254
AVFormatContext * ctx
Definition: movenc.c:48
int nb_filtergraphs
Definition: ffmpeg.c:155
int audio_channels_mapped
Definition: ffmpeg.h:503
int n
Definition: avisynth_c.h:684
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
enum AVCodecID codec_id
Definition: vaapi_decode.c:235
int height
Definition: ffmpeg.h:277
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:389
int sample_rate
Definition: ffmpeg.h:280
#define GET_SAMPLE_FMT_NAME(sample_fmt)
Definition: cmdutils.h:645
AVFilterContext * filter_ctx
filter context associated to this input/output
Definition: avfilter.h:1037
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:1294
void exit_program(int ret)
Wraps exit with a program-specific cleanup routine.
Definition: cmdutils.c:135
AVCodecContext * enc
Definition: muxing.c:55
int start_at_zero
Definition: ffmpeg_opt.c:124
int avfilter_init_str(AVFilterContext *filter, const char *args)
Initialize a filter with the supplied parameters.
Definition: avfilter.c:986
int audio_volume
Definition: ffmpeg_opt.c:114
Stream structure.
Definition: avformat.h:889
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:1032
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:274
InputFilter ** filters
Definition: ffmpeg.h:365
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:648
int64_t recording_time
Definition: ffmpeg.h:415
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2536
AVBufferRef * hw_frames_ctx
Video with a hwaccel pixel format only.
Definition: buffersrc.h:106
AVStream * st
Definition: ffmpeg.h:304
sample_rate
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:379
#define AV_BPRINT_SIZE_AUTOMATIC
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:237
static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in)
enum AVMediaType codec_type
Definition: avcodec.h:1762
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
enum AVCodecID codec_id
Definition: avcodec.h:1771
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:404
const char * graph_desc
Definition: ffmpeg.h:291
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:413
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:194
main external API structure.
Definition: avcodec.h:1754
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:353
void avsubtitle_free(AVSubtitle *sub)
Free all allocated data in the given subtitle struct.
Definition: utils.c:1144
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:289
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:472
#define AUTO_INSERT_FILTER(opt_name, filter_name, arg)
GLint GLenum type
Definition: opengl_enc.c:105
AVBufferRef * hw_frames_ctx
Definition: ffmpeg.h:261
int channels
Definition: ffmpeg.h:258
int * audio_channels_map
Definition: ffmpeg.h:502
static const char * format
Definition: movenc.c:47
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:113
int sample_rate
Sample rate of the audio data.
Definition: frame.h:374
Filter definition.
Definition: avfilter.h:144
int pad_idx
index of the filt_ctx pad to use for linking
Definition: avfilter.h:1040
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int file_index
Definition: ffmpeg.h:450
AVCodecContext * dec_ctx
Definition: ffmpeg.h:311
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:254
const char * name
Filter name.
Definition: avfilter.h:148
int av_buffersink_get_w(const AVFilterContext *ctx)
unsigned nb_filters
Definition: avfilter.h:858
int autorotate
Definition: ffmpeg.h:344
#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:1105
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
float audio_drift_threshold
Definition: ffmpeg_opt.c:110
char * name
unique name for this input/output in the list
Definition: avfilter.h:1034
int nb_filters
Definition: ffmpeg.h:366
#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:1434
#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
int reconfiguration
Definition: ffmpeg.h:294
struct FilterGraph * graph
Definition: ffmpeg.h:269
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
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:85
#define AV_CODEC_CAP_LOSSLESS
Codec is lossless.
Definition: avcodec.h:1099
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:76
char * key
Definition: dict.h:86
int den
Denominator.
Definition: rational.h:60
uint64_t channel_layout
Definition: ffmpeg.h:259
int copy_ts
Definition: ffmpeg_opt.c:123
AVFormatContext * ctx
Definition: ffmpeg.h:401
#define AVERROR_DECODER_NOT_FOUND
Decoder not found.
Definition: error.h:52
int do_deinterlace
Definition: ffmpeg_opt.c:118
#define GROW_ARRAY(array, nb_elems)
Definition: cmdutils.h:639
pixel format definitions
char * avfilter
Definition: ffmpeg.h:509
uint8_t * name
Definition: ffmpeg.h:246
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:2517
OutputFilter ** outputs
Definition: ffmpeg.h:298
InputFile ** input_files
Definition: ffmpeg.c:146
AVBufferSrcParameters * av_buffersrc_parameters_alloc(void)
Allocate a new AVBufferSrcParameters instance.
Definition: buffersrc.c:82
AVFormatContext * ctx
Definition: ffmpeg.h:564
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:513
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:259
FILE * out
Definition: movenc.c:54
InputFilter ** inputs
Definition: ffmpeg.h:296
#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:151
#define AV_LOG_FATAL
Something went wrong and recovery is not possible.
Definition: log.h:170
AVCodecParameters * codecpar
Definition: avformat.h:1252
enum AVSampleFormat * sample_fmts
array of supported sample formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3753
int format
Definition: ffmpeg.h:279
formats
Definition: signature.h:48
int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
int discard
Definition: ffmpeg.h:305
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:2335
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:926
void choose_sample_fmt(AVStream *st, AVCodec *codec)
Definition: ffmpeg_filter.c:92
int nb_inputs
Definition: ffmpeg.h:297
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:952
int index
Definition: ffmpeg.h:451
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
enum AVMediaType type
Definition: ffmpeg.h:274
AVFifoBuffer * frame_queue
Definition: ffmpeg.h:249
#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:2973
all automatic conversions disabled
Definition: avfilter.h:1005
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:144
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
discard nothing
Definition: avcodec.h:824
const char * name
Definition: opengl_enc.c:103
static uint8_t tmp[11]
Definition: aes_ctr.c:26