FFmpeg  4.4.6
tee.c
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1 /*
2  * Tee pseudo-muxer
3  * Copyright (c) 2012 Nicolas George
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public License
9  * as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public License
18  * along with FFmpeg; if not, write to the Free Software * Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 
23 #include "libavutil/avutil.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/opt.h"
26 #include "internal.h"
27 #include "avformat.h"
28 #include "avio_internal.h"
29 #include "tee_common.h"
30 
31 typedef enum {
35 
36 #define DEFAULT_SLAVE_FAILURE_POLICY ON_SLAVE_FAILURE_ABORT
37 
38 typedef struct {
40  AVBSFContext **bsfs; ///< bitstream filters per stream
41 
43  int use_fifo;
45 
46  /** map from input to output streams indexes,
47  * disabled output streams are set to -1 */
48  int *stream_map;
50 } TeeSlave;
51 
52 typedef struct TeeContext {
53  const AVClass *class;
54  unsigned nb_slaves;
55  unsigned nb_alive;
57  int use_fifo;
59 } TeeContext;
60 
61 static const char *const slave_delim = "|";
62 static const char *const slave_bsfs_spec_sep = "/";
63 static const char *const slave_select_sep = ",";
64 
65 #define OFFSET(x) offsetof(TeeContext, x)
66 static const AVOption options[] = {
67  {"use_fifo", "Use fifo pseudo-muxer to separate actual muxers from encoder",
68  OFFSET(use_fifo), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
69  {"fifo_options", "fifo pseudo-muxer options", OFFSET(fifo_options),
71  {NULL}
72 };
73 
74 static const AVClass tee_muxer_class = {
75  .class_name = "Tee muxer",
76  .item_name = av_default_item_name,
77  .option = options,
78  .version = LIBAVUTIL_VERSION_INT,
79 };
80 
81 static inline int parse_slave_failure_policy_option(const char *opt, TeeSlave *tee_slave)
82 {
83  if (!opt) {
85  return 0;
86  } else if (!av_strcasecmp("abort", opt)) {
87  tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
88  return 0;
89  } else if (!av_strcasecmp("ignore", opt)) {
90  tee_slave->on_fail = ON_SLAVE_FAILURE_IGNORE;
91  return 0;
92  }
93  /* Set failure behaviour to abort, so invalid option error will not be ignored */
94  tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
95  return AVERROR(EINVAL);
96 }
97 
98 static int parse_slave_fifo_options(const char *use_fifo,
99  const char *fifo_options, TeeSlave *tee_slave)
100 {
101  int ret = 0;
102 
103  if (use_fifo) {
104  /*TODO - change this to use proper function for parsing boolean
105  * options when there is one */
106  if (av_match_name(use_fifo, "true,y,yes,enable,enabled,on,1")) {
107  tee_slave->use_fifo = 1;
108  } else if (av_match_name(use_fifo, "false,n,no,disable,disabled,off,0")) {
109  tee_slave->use_fifo = 0;
110  } else {
111  return AVERROR(EINVAL);
112  }
113  }
114 
115  if (fifo_options)
116  ret = av_dict_parse_string(&tee_slave->fifo_options, fifo_options, "=", ":", 0);
117 
118  return ret;
119 }
120 
121 static int close_slave(TeeSlave *tee_slave)
122 {
123  AVFormatContext *avf;
124  unsigned i;
125  int ret = 0;
126 
127  av_dict_free(&tee_slave->fifo_options);
128  avf = tee_slave->avf;
129  if (!avf)
130  return 0;
131 
132  if (tee_slave->header_written)
133  ret = av_write_trailer(avf);
134 
135  if (tee_slave->bsfs) {
136  for (i = 0; i < avf->nb_streams; ++i)
137  av_bsf_free(&tee_slave->bsfs[i]);
138  }
139  av_freep(&tee_slave->stream_map);
140  av_freep(&tee_slave->bsfs);
141 
142  ff_format_io_close(avf, &avf->pb);
144  tee_slave->avf = NULL;
145  return ret;
146 }
147 
148 static void close_slaves(AVFormatContext *avf)
149 {
150  TeeContext *tee = avf->priv_data;
151  unsigned i;
152 
153  for (i = 0; i < tee->nb_slaves; i++) {
154  close_slave(&tee->slaves[i]);
155  }
156  av_freep(&tee->slaves);
157 }
158 
159 static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
160 {
161  int i, ret;
162  AVDictionary *options = NULL, *bsf_options = NULL;
163  AVDictionaryEntry *entry;
164  char *filename;
165  char *format = NULL, *select = NULL, *on_fail = NULL;
166  char *use_fifo = NULL, *fifo_options_str = NULL;
167  AVFormatContext *avf2 = NULL;
168  AVStream *st, *st2;
169  int stream_count;
170  int fullret;
171  char *subselect = NULL, *next_subselect = NULL, *first_subselect = NULL, *tmp_select = NULL;
172 
173  if ((ret = ff_tee_parse_slave_options(avf, slave, &options, &filename)) < 0)
174  return ret;
175 
176 #define STEAL_OPTION(option, field) do { \
177  if ((entry = av_dict_get(options, option, NULL, 0))) { \
178  field = entry->value; \
179  entry->value = NULL; /* prevent it from being freed */ \
180  av_dict_set(&options, option, NULL, 0); \
181  } \
182  } while (0)
183 
184  STEAL_OPTION("f", format);
185  STEAL_OPTION("select", select);
186  STEAL_OPTION("onfail", on_fail);
187  STEAL_OPTION("use_fifo", use_fifo);
188  STEAL_OPTION("fifo_options", fifo_options_str);
189  entry = NULL;
190  while ((entry = av_dict_get(options, "bsfs", entry, AV_DICT_IGNORE_SUFFIX))) {
191  /* trim out strlen("bsfs") characters from key */
192  av_dict_set(&bsf_options, entry->key + 4, entry->value, 0);
193  av_dict_set(&options, entry->key, NULL, 0);
194  }
195 
196  ret = parse_slave_failure_policy_option(on_fail, tee_slave);
197  if (ret < 0) {
198  av_log(avf, AV_LOG_ERROR,
199  "Invalid onfail option value, valid options are 'abort' and 'ignore'\n");
200  goto end;
201  }
202 
203  ret = parse_slave_fifo_options(use_fifo, fifo_options_str, tee_slave);
204  if (ret < 0) {
205  av_log(avf, AV_LOG_ERROR, "Error parsing fifo options: %s\n", av_err2str(ret));
206  goto end;
207  }
208 
209  if (tee_slave->use_fifo) {
210 
211  if (options) {
212  char *format_options_str = NULL;
213  ret = av_dict_get_string(options, &format_options_str, '=', ':');
214  if (ret < 0)
215  goto end;
216 
217  ret = av_dict_set(&tee_slave->fifo_options, "format_opts", format_options_str,
219  if (ret < 0)
220  goto end;
221  }
222 
223  if (format) {
224  ret = av_dict_set(&tee_slave->fifo_options, "fifo_format", format,
226  format = NULL;
227  if (ret < 0)
228  goto end;
229  }
230 
232  options = tee_slave->fifo_options;
233  tee_slave->fifo_options = NULL;
234  }
236  tee_slave->use_fifo ? "fifo" :format, filename);
237  if (ret < 0)
238  goto end;
239  tee_slave->avf = avf2;
240  av_dict_copy(&avf2->metadata, avf->metadata, 0);
241  avf2->opaque = avf->opaque;
242  avf2->io_open = avf->io_open;
243  avf2->io_close = avf->io_close;
245  avf2->flags = avf->flags;
247 
248  tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
249  if (!tee_slave->stream_map) {
250  ret = AVERROR(ENOMEM);
251  goto end;
252  }
253 
254  stream_count = 0;
255  for (i = 0; i < avf->nb_streams; i++) {
256  st = avf->streams[i];
257  if (select) {
258  tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop
259  if (!tmp_select) {
260  ret = AVERROR(ENOMEM);
261  goto end;
262  }
263  fullret = 0;
264  first_subselect = tmp_select;
265  next_subselect = NULL;
266  while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {
267  first_subselect = NULL;
268 
269  ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);
270  if (ret < 0) {
271  av_log(avf, AV_LOG_ERROR,
272  "Invalid stream specifier '%s' for output '%s'\n",
273  subselect, slave);
274  goto end;
275  }
276  if (ret != 0) {
277  fullret = 1; // match
278  break;
279  }
280  }
281  av_freep(&tmp_select);
282 
283  if (fullret == 0) { /* no match */
284  tee_slave->stream_map[i] = -1;
285  continue;
286  }
287  }
288  tee_slave->stream_map[i] = stream_count++;
289 
290  if (!(st2 = avformat_new_stream(avf2, NULL))) {
291  ret = AVERROR(ENOMEM);
292  goto end;
293  }
294 
295  ret = ff_stream_encode_params_copy(st2, st);
296  if (ret < 0)
297  goto end;
298  }
299 
300  ret = ff_format_output_open(avf2, filename, &options);
301  if (ret < 0) {
302  av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n", slave,
303  av_err2str(ret));
304  goto end;
305  }
306 
307  if ((ret = avformat_write_header(avf2, &options)) < 0) {
308  av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
309  slave, av_err2str(ret));
310  goto end;
311  }
312  tee_slave->header_written = 1;
313 
314  tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(*tee_slave->bsfs));
315  if (!tee_slave->bsfs) {
316  ret = AVERROR(ENOMEM);
317  goto end;
318  }
319 
320  entry = NULL;
321  while (entry = av_dict_get(bsf_options, "", NULL, AV_DICT_IGNORE_SUFFIX)) {
322  const char *spec = entry->key;
323  if (*spec) {
324  if (strspn(spec, slave_bsfs_spec_sep) != 1) {
325  av_log(avf, AV_LOG_ERROR,
326  "Specifier separator in '%s' is '%c', but only characters '%s' "
327  "are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
328  ret = AVERROR(EINVAL);
329  goto end;
330  }
331  spec++; /* consume separator */
332  }
333 
334  for (i = 0; i < avf2->nb_streams; i++) {
335  ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
336  if (ret < 0) {
337  av_log(avf, AV_LOG_ERROR,
338  "Invalid stream specifier '%s' in bsfs option '%s' for slave "
339  "output '%s'\n", spec, entry->key, filename);
340  goto end;
341  }
342 
343  if (ret > 0) {
344  av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
345  "output '%s'\n", spec, entry->value, i, filename);
346  if (tee_slave->bsfs[i]) {
347  av_log(avf, AV_LOG_WARNING,
348  "Duplicate bsfs specification associated to stream %d of slave "
349  "output '%s', filters will be ignored\n", i, filename);
350  continue;
351  }
352  ret = av_bsf_list_parse_str(entry->value, &tee_slave->bsfs[i]);
353  if (ret < 0) {
354  av_log(avf, AV_LOG_ERROR,
355  "Error parsing bitstream filter sequence '%s' associated to "
356  "stream %d of slave output '%s'\n", entry->value, i, filename);
357  goto end;
358  }
359  }
360  }
361 
362  av_dict_set(&bsf_options, entry->key, NULL, 0);
363  }
364 
365  for (i = 0; i < avf->nb_streams; i++){
366  int target_stream = tee_slave->stream_map[i];
367  if (target_stream < 0)
368  continue;
369 
370  if (!tee_slave->bsfs[target_stream]) {
371  /* Add pass-through bitstream filter */
372  ret = av_bsf_get_null_filter(&tee_slave->bsfs[target_stream]);
373  if (ret < 0) {
374  av_log(avf, AV_LOG_ERROR,
375  "Failed to create pass-through bitstream filter: %s\n",
376  av_err2str(ret));
377  goto end;
378  }
379  }
380 
381  tee_slave->bsfs[target_stream]->time_base_in = avf->streams[i]->time_base;
382  ret = avcodec_parameters_copy(tee_slave->bsfs[target_stream]->par_in,
383  avf->streams[i]->codecpar);
384  if (ret < 0)
385  goto end;
386 
387  ret = av_bsf_init(tee_slave->bsfs[target_stream]);
388  if (ret < 0) {
389  av_log(avf, AV_LOG_ERROR,
390  "Failed to initialize bitstream filter(s): %s\n",
391  av_err2str(ret));
392  goto end;
393  }
394  }
395 
396  if (options) {
397  entry = NULL;
398  while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
399  av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
401  goto end;
402  }
403 
404 end:
405  av_free(format);
406  av_free(select);
407  av_free(on_fail);
408  av_free(use_fifo);
409  av_free(fifo_options_str);
411  av_dict_free(&bsf_options);
412  av_freep(&tmp_select);
413  return ret;
414 }
415 
416 static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
417 {
418  int i;
419  av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
420  slave->avf->url, slave->avf->oformat->name);
421  for (i = 0; i < slave->avf->nb_streams; i++) {
422  AVStream *st = slave->avf->streams[i];
423  AVBSFContext *bsf = slave->bsfs[i];
424  const char *bsf_name;
425 
426  av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
429 
430  bsf_name = bsf->filter->priv_class ?
431  bsf->filter->priv_class->item_name(bsf) : bsf->filter->name;
432  av_log(log_ctx, log_level, " bsfs: %s\n", bsf_name);
433  }
434 }
435 
436 static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
437 {
438  TeeContext *tee = avf->priv_data;
439  TeeSlave *tee_slave = &tee->slaves[slave_idx];
440 
441  tee->nb_alive--;
442 
443  close_slave(tee_slave);
444 
445  if (!tee->nb_alive) {
446  av_log(avf, AV_LOG_ERROR, "All tee outputs failed.\n");
447  return err_n;
448  } else if (tee_slave->on_fail == ON_SLAVE_FAILURE_ABORT) {
449  av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed, aborting.\n", slave_idx);
450  return err_n;
451  } else {
452  av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed: %s, continuing with %u/%u slaves.\n",
453  slave_idx, av_err2str(err_n), tee->nb_alive, tee->nb_slaves);
454  return 0;
455  }
456 }
457 
459 {
460  TeeContext *tee = avf->priv_data;
461  unsigned nb_slaves = 0, i;
462  const char *filename = avf->url;
463  char **slaves = NULL;
464  int ret;
465 
466  while (*filename) {
467  char *slave = av_get_token(&filename, slave_delim);
468  if (!slave) {
469  ret = AVERROR(ENOMEM);
470  goto fail;
471  }
472  ret = av_dynarray_add_nofree(&slaves, &nb_slaves, slave);
473  if (ret < 0) {
474  av_free(slave);
475  goto fail;
476  }
477  if (strspn(filename, slave_delim))
478  filename++;
479  }
480 
481  if (!(tee->slaves = av_mallocz_array(nb_slaves, sizeof(*tee->slaves)))) {
482  ret = AVERROR(ENOMEM);
483  goto fail;
484  }
485  tee->nb_slaves = tee->nb_alive = nb_slaves;
486 
487  for (i = 0; i < nb_slaves; i++) {
488 
489  tee->slaves[i].use_fifo = tee->use_fifo;
490  ret = av_dict_copy(&tee->slaves[i].fifo_options, tee->fifo_options, 0);
491  if (ret < 0)
492  goto fail;
493 
494  if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0) {
495  ret = tee_process_slave_failure(avf, i, ret);
496  if (ret < 0)
497  goto fail;
498  } else {
499  log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
500  }
501  av_freep(&slaves[i]);
502  }
503 
504  for (i = 0; i < avf->nb_streams; i++) {
505  int j, mapped = 0;
506  for (j = 0; j < tee->nb_slaves; j++)
507  if (tee->slaves[j].avf)
508  mapped += tee->slaves[j].stream_map[i] >= 0;
509  if (!mapped)
510  av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
511  "to any slave.\n", i);
512  }
513  av_free(slaves);
514  return 0;
515 
516 fail:
517  for (i = 0; i < nb_slaves; i++)
518  av_freep(&slaves[i]);
519  close_slaves(avf);
520  av_free(slaves);
521  return ret;
522 }
523 
525 {
526  TeeContext *tee = avf->priv_data;
527  int ret_all = 0, ret;
528  unsigned i;
529 
530  for (i = 0; i < tee->nb_slaves; i++) {
531  if ((ret = close_slave(&tee->slaves[i])) < 0) {
532  ret = tee_process_slave_failure(avf, i, ret);
533  if (!ret_all && ret < 0)
534  ret_all = ret;
535  }
536  }
537  av_freep(&tee->slaves);
538  return ret_all;
539 }
540 
542 {
543  TeeContext *tee = avf->priv_data;
544  AVFormatContext *avf2;
545  AVBSFContext *bsfs;
546  AVPacket pkt2;
547  int ret_all = 0, ret;
548  unsigned i, s;
549  int s2;
550 
551  for (i = 0; i < tee->nb_slaves; i++) {
552  if (!(avf2 = tee->slaves[i].avf))
553  continue;
554 
555  /* Flush slave if pkt is NULL*/
556  if (!pkt) {
557  ret = av_interleaved_write_frame(avf2, NULL);
558  if (ret < 0) {
559  ret = tee_process_slave_failure(avf, i, ret);
560  if (!ret_all && ret < 0)
561  ret_all = ret;
562  }
563  continue;
564  }
565 
566  s = pkt->stream_index;
567  s2 = tee->slaves[i].stream_map[s];
568  if (s2 < 0)
569  continue;
570 
571  if ((ret = av_packet_ref(&pkt2, pkt)) < 0)
572  if (!ret_all) {
573  ret_all = ret;
574  continue;
575  }
576  bsfs = tee->slaves[i].bsfs[s2];
577  pkt2.stream_index = s2;
578 
579  ret = av_bsf_send_packet(bsfs, &pkt2);
580  if (ret < 0) {
581  av_log(avf, AV_LOG_ERROR, "Error while sending packet to bitstream filter: %s\n",
582  av_err2str(ret));
583  ret = tee_process_slave_failure(avf, i, ret);
584  if (!ret_all && ret < 0)
585  ret_all = ret;
586  }
587 
588  while(1) {
589  ret = av_bsf_receive_packet(bsfs, &pkt2);
590  if (ret == AVERROR(EAGAIN)) {
591  ret = 0;
592  break;
593  } else if (ret < 0) {
594  break;
595  }
596 
597  av_packet_rescale_ts(&pkt2, bsfs->time_base_out,
598  avf2->streams[s2]->time_base);
599  ret = av_interleaved_write_frame(avf2, &pkt2);
600  if (ret < 0)
601  break;
602  };
603 
604  if (ret < 0) {
605  ret = tee_process_slave_failure(avf, i, ret);
606  if (!ret_all && ret < 0)
607  ret_all = ret;
608  }
609  }
610  return ret_all;
611 }
612 
614  .name = "tee",
615  .long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
616  .priv_data_size = sizeof(TeeContext),
620  .priv_class = &tee_muxer_class,
622 };
static const char *const format[]
Definition: af_aiir.c:456
Main libavformat public API header.
int avformat_alloc_output_context2(AVFormatContext **ctx, ff_const59 AVOutputFormat *oformat, const char *format_name, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:136
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:471
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:458
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:475
Convenience header that includes libavutil's core.
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define s(width, name)
Definition: cbs_vp9.c:257
#define fail()
Definition: checkasm.h:133
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: codec_par.c:72
#define NULL
Definition: coverity.c:32
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:730
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
@ AV_OPT_TYPE_DICT
Definition: opt.h:232
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
void av_bsf_free(AVBSFContext **pctx)
Free a bitstream filter context and everything associated with it; write NULL into the supplied point...
Definition: bsf.c:40
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:480
int av_bsf_init(AVBSFContext *ctx)
Prepare the filter for use, after all the parameters and options have been set.
Definition: bsf.c:148
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:227
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:201
int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst)
Parse string describing list of bitstream filters and create single AVBSFContext describing the whole...
Definition: bsf.c:523
int av_bsf_get_null_filter(AVBSFContext **bsf)
Get null/pass-through bitstream filter.
Definition: bsf.c:557
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:641
void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
Convert valid timing fields (timestamps / durations) in a packet from one timebase to another.
Definition: avpacket.c:737
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4436
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4509
av_warn_unused_result int avformat_write_header(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and write the stream header to an output media file.
Definition: mux.c:506
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1259
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1274
int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
Check if the stream st contained in s is matched by the stream specifier spec.
Definition: utils.c:5326
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key,...
Definition: dict.h:70
int av_dict_get_string(const AVDictionary *m, char **buffer, const char key_val_sep, const char pairs_sep)
Get dictionary entries as a string.
Definition: dict.c:230
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:74
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
int av_dict_parse_string(AVDictionary **pm, const char *str, const char *key_val_sep, const char *pairs_sep, int flags)
Parse the key/value pairs list and add the parsed entries to a dictionary.
Definition: dict.c:180
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
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
#define AVERROR(e)
Definition: error.h:43
#define AVERROR_OPTION_NOT_FOUND
Option not found.
Definition: error.h:61
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
Add an element to a dynamic array.
Definition: mem.c:296
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
void * av_mallocz_array(size_t nmemb, size_t size)
Allocate a memory block for an array with av_mallocz().
Definition: mem.c:190
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:71
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok().
Definition: avstring.c:186
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:215
int av_match_name(const char *name, const char *names)
Match instances of a name in a comma-separated list of names.
Definition: avstring.c:353
char * av_get_token(const char **buf, const char *term)
Unescape the given string until a non escaped terminating char, and return the token corresponding to...
Definition: avstring.c:151
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int i
Definition: input.c:407
int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
Utility function to open IO stream of output format.
Definition: utils.c:5682
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
Copy encoding parameters from source to destination stream.
Definition: utils.c:4316
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5692
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AVOptions.
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:278
#define s2
Definition: regdef.h:39
The bitstream filter state.
Definition: bsf.h:49
AVRational time_base_out
The timebase used for the timestamps of the output packets.
Definition: bsf.h:95
AVCodecParameters * par_in
Parameters of the input stream.
Definition: bsf.h:77
AVRational time_base_in
The timebase used for the timestamps of the input packets.
Definition: bsf.h:89
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: bsf.h:58
const AVClass * priv_class
A class for the private data, used to declare bitstream filter private AVOptions.
Definition: bsf.h:117
const char * name
Definition: bsf.h:99
Describe the class of an AVClass context structure.
Definition: log.h:67
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
const char *(* item_name)(void *ctx)
A pointer to a function which returns the name of a context instance ctx associated with the class.
Definition: log.h:78
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
char * key
Definition: dict.h:82
char * value
Definition: dict.h:83
Format I/O context.
Definition: avformat.h:1232
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1288
AVIOContext * pb
I/O context.
Definition: avformat.h:1274
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1474
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1363
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1542
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1512
char * url
input or output URL.
Definition: avformat.h:1328
void * opaque
User data.
Definition: avformat.h:1752
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1251
void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1834
void * priv_data
Format private data.
Definition: avformat.h:1260
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1300
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1828
AVOption.
Definition: opt.h:248
const char * name
Definition: avformat.h:491
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:902
Definition: tee.c:52
AVDictionary * fifo_options
Definition: tee.c:58
TeeSlave * slaves
Definition: tee.c:56
unsigned nb_slaves
Definition: tee.c:54
unsigned nb_alive
Definition: tee.c:55
int use_fifo
Definition: tee.c:57
Definition: tee.c:38
int header_written
Definition: tee.c:49
AVFormatContext * avf
Definition: tee.c:39
int * stream_map
map from input to output streams indexes, disabled output streams are set to -1
Definition: tee.c:48
AVDictionary * fifo_options
Definition: tee.c:44
AVBSFContext ** bsfs
bitstream filters per stream
Definition: tee.c:40
SlaveFailurePolicy on_fail
Definition: tee.c:42
int use_fifo
Definition: tee.c:43
#define av_free(p)
#define av_freep(p)
#define av_log(a,...)
SlaveFailurePolicy
Definition: tee.c:31
@ ON_SLAVE_FAILURE_ABORT
Definition: tee.c:32
@ ON_SLAVE_FAILURE_IGNORE
Definition: tee.c:33
static int parse_slave_failure_policy_option(const char *opt, TeeSlave *tee_slave)
Definition: tee.c:81
static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
Definition: tee.c:436
#define STEAL_OPTION(option, field)
static int tee_write_trailer(AVFormatContext *avf)
Definition: tee.c:524
static const AVOption options[]
Definition: tee.c:66
#define DEFAULT_SLAVE_FAILURE_POLICY
Definition: tee.c:36
static const char *const slave_select_sep
Definition: tee.c:63
static const char *const slave_delim
Definition: tee.c:61
static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
Definition: tee.c:541
static int parse_slave_fifo_options(const char *use_fifo, const char *fifo_options, TeeSlave *tee_slave)
Definition: tee.c:98
static int close_slave(TeeSlave *tee_slave)
Definition: tee.c:121
AVOutputFormat ff_tee_muxer
Definition: tee.c:613
static const char *const slave_bsfs_spec_sep
Definition: tee.c:62
static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
Definition: tee.c:159
#define OFFSET(x)
Definition: tee.c:65
static int tee_write_header(AVFormatContext *avf)
Definition: tee.c:458
static const AVClass tee_muxer_class
Definition: tee.c:74
static void close_slaves(AVFormatContext *avf)
Definition: tee.c:148
static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
Definition: tee.c:416
int ff_tee_parse_slave_options(void *log, char *slave, AVDictionary **options, char **filename)
Definition: tee_common.c:32
AVPacket * pkt
Definition: movenc.c:59
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:98