FFmpeg  4.3
flvenc.c
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1 /*
2  * FLV muxer
3  * Copyright (c) 2003 The FFmpeg Project
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
9  * License 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 GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/intfloat.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/mathematics.h"
27 #include "avio_internal.h"
28 #include "avio.h"
29 #include "avc.h"
30 #include "avformat.h"
31 #include "flv.h"
32 #include "internal.h"
33 #include "metadata.h"
34 #include "libavutil/opt.h"
35 #include "libavcodec/put_bits.h"
36 #include "libavcodec/aacenctab.h"
37 
38 
39 static const AVCodecTag flv_video_codec_ids[] = {
46  { AV_CODEC_ID_VP6, FLV_CODECID_VP6 },
49  { AV_CODEC_ID_NONE, 0 }
50 };
51 
52 static const AVCodecTag flv_audio_codec_ids[] = {
54  { AV_CODEC_ID_PCM_U8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
55  { AV_CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
56  { AV_CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET },
57  { AV_CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET },
58  { AV_CODEC_ID_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET },
59  { AV_CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET },
60  { AV_CODEC_ID_PCM_MULAW, FLV_CODECID_PCM_MULAW >> FLV_AUDIO_CODECID_OFFSET },
61  { AV_CODEC_ID_PCM_ALAW, FLV_CODECID_PCM_ALAW >> FLV_AUDIO_CODECID_OFFSET },
62  { AV_CODEC_ID_SPEEX, FLV_CODECID_SPEEX >> FLV_AUDIO_CODECID_OFFSET },
63  { AV_CODEC_ID_NONE, 0 }
64 };
65 
66 typedef enum {
68  FLV_NO_SEQUENCE_END = (1 << 1),
70  FLV_NO_METADATA = (1 << 3),
72 } FLVFlags;
73 
74 typedef struct FLVFileposition {
79 
80 typedef struct FLVContext {
82  int reserved;
83  int64_t duration_offset;
84  int64_t filesize_offset;
85  int64_t duration;
86  int64_t delay; ///< first dts delay (needed for AVC & Speex)
87 
89  int64_t datasize_offset;
90  int64_t datasize;
92  int64_t videosize;
94  int64_t audiosize;
95 
100 
107 
110 
114 
117  double framerate;
119 
120  int flags;
121 } FLVContext;
122 
123 typedef struct FLVStreamContext {
124  int64_t last_ts; ///< last timestamp for each stream
126 
128 {
131 
132  if (par->codec_id == AV_CODEC_ID_AAC) // specs force these parameters
135  else if (par->codec_id == AV_CODEC_ID_SPEEX) {
136  if (par->sample_rate != 16000) {
137  av_log(s, AV_LOG_ERROR,
138  "FLV only supports wideband (16kHz) Speex audio\n");
139  return AVERROR(EINVAL);
140  }
141  if (par->channels != 1) {
142  av_log(s, AV_LOG_ERROR, "FLV only supports mono Speex audio\n");
143  return AVERROR(EINVAL);
144  }
146  } else {
147  switch (par->sample_rate) {
148  case 48000:
149  // 48khz mp3 is stored with 44k1 samplerate identifer
150  if (par->codec_id == AV_CODEC_ID_MP3) {
151  flags |= FLV_SAMPLERATE_44100HZ;
152  break;
153  } else {
154  goto error;
155  }
156  case 44100:
157  flags |= FLV_SAMPLERATE_44100HZ;
158  break;
159  case 22050:
160  flags |= FLV_SAMPLERATE_22050HZ;
161  break;
162  case 11025:
163  flags |= FLV_SAMPLERATE_11025HZ;
164  break;
165  case 16000: // nellymoser only
166  case 8000: // nellymoser only
167  case 5512: // not MP3
168  if (par->codec_id != AV_CODEC_ID_MP3) {
169  flags |= FLV_SAMPLERATE_SPECIAL;
170  break;
171  }
172  default:
173 error:
174  av_log(s, AV_LOG_ERROR,
175  "FLV does not support sample rate %d, "
176  "choose from (44100, 22050, 11025)\n", par->sample_rate);
177  return AVERROR(EINVAL);
178  }
179  }
180 
181  if (par->channels > 1)
182  flags |= FLV_STEREO;
183 
184  switch (par->codec_id) {
185  case AV_CODEC_ID_MP3:
187  break;
188  case AV_CODEC_ID_PCM_U8:
190  break;
193  break;
196  break;
199  break;
201  if (par->sample_rate == 8000)
203  else if (par->sample_rate == 16000)
205  else
207  break;
210  break;
213  break;
214  case 0:
215  flags |= par->codec_tag << 4;
216  break;
217  default:
218  av_log(s, AV_LOG_ERROR, "Audio codec '%s' not compatible with FLV\n",
219  avcodec_get_name(par->codec_id));
220  return AVERROR(EINVAL);
221  }
222 
223  return flags;
224 }
225 
226 static void put_amf_string(AVIOContext *pb, const char *str)
227 {
228  size_t len = strlen(str);
229  avio_wb16(pb, len);
230  avio_write(pb, str, len);
231 }
232 
233 // FLV timestamps are 32 bits signed, RTMP timestamps should be 32-bit unsigned
234 static void put_timestamp(AVIOContext *pb, int64_t ts) {
235  avio_wb24(pb, ts & 0xFFFFFF);
236  avio_w8(pb, (ts >> 24) & 0x7F);
237 }
238 
239 static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
240 {
242  avio_wb24(pb, 5); /* Tag Data Size */
243  put_timestamp(pb, ts);
244  avio_wb24(pb, 0); /* StreamId = 0 */
245  avio_w8(pb, 23); /* ub[4] FrameType = 1, ub[4] CodecId = 7 */
246  avio_w8(pb, 2); /* AVC end of sequence */
247  avio_wb24(pb, 0); /* Always 0 for AVC EOS. */
248  avio_wb32(pb, 16); /* Size of FLV tag */
249 }
250 
251 static void put_amf_double(AVIOContext *pb, double d)
252 {
254  avio_wb64(pb, av_double2int(d));
255 }
256 
257 static void put_amf_byte(AVIOContext *pb, unsigned char abyte)
258 {
259  avio_w8(pb, abyte);
260 }
261 
262 static void put_amf_dword_array(AVIOContext *pb, uint32_t dw)
263 {
265  avio_wb32(pb, dw);
266 }
267 
268 static void put_amf_bool(AVIOContext *pb, int b)
269 {
271  avio_w8(pb, !!b);
272 }
273 
274 static void write_metadata(AVFormatContext *s, unsigned int ts)
275 {
276  AVIOContext *pb = s->pb;
277  FLVContext *flv = s->priv_data;
278  int write_duration_filesize = !(flv->flags & FLV_NO_DURATION_FILESIZE);
279  int metadata_count = 0;
280  int64_t metadata_count_pos;
282 
283  /* write meta_tag */
284  avio_w8(pb, FLV_TAG_TYPE_META); // tag type META
285  flv->metadata_size_pos = avio_tell(pb);
286  avio_wb24(pb, 0); // size of data part (sum of all parts below)
287  avio_wb24(pb, ts); // timestamp
288  avio_wb32(pb, 0); // reserved
289 
290  /* now data of data_size size */
291 
292  /* first event name as a string */
294  put_amf_string(pb, "onMetaData"); // 12 bytes
295 
296  /* mixed array (hash) with size and string/type/data tuples */
298  metadata_count_pos = avio_tell(pb);
299  metadata_count = 4 * !!flv->video_par +
300  5 * !!flv->audio_par +
301  1 * !!flv->data_par;
302  if (write_duration_filesize) {
303  metadata_count += 2; // +2 for duration and file size
304  }
305  avio_wb32(pb, metadata_count);
306 
307  if (write_duration_filesize) {
308  put_amf_string(pb, "duration");
309  flv->duration_offset = avio_tell(pb);
310  // fill in the guessed duration, it'll be corrected later if incorrect
312  }
313 
314  if (flv->video_par) {
315  put_amf_string(pb, "width");
316  put_amf_double(pb, flv->video_par->width);
317 
318  put_amf_string(pb, "height");
319  put_amf_double(pb, flv->video_par->height);
320 
321  put_amf_string(pb, "videodatarate");
322  put_amf_double(pb, flv->video_par->bit_rate / 1024.0);
323 
324  if (flv->framerate != 0.0) {
325  put_amf_string(pb, "framerate");
326  put_amf_double(pb, flv->framerate);
327  metadata_count++;
328  }
329 
330  put_amf_string(pb, "videocodecid");
332  }
333 
334  if (flv->audio_par) {
335  put_amf_string(pb, "audiodatarate");
336  put_amf_double(pb, flv->audio_par->bit_rate / 1024.0);
337 
338  put_amf_string(pb, "audiosamplerate");
340 
341  put_amf_string(pb, "audiosamplesize");
342  put_amf_double(pb, flv->audio_par->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);
343 
344  put_amf_string(pb, "stereo");
345  put_amf_bool(pb, flv->audio_par->channels == 2);
346 
347  put_amf_string(pb, "audiocodecid");
349  }
350 
351  if (flv->data_par) {
352  put_amf_string(pb, "datastream");
353  put_amf_double(pb, 0.0);
354  }
355 
357  while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
358  if( !strcmp(tag->key, "width")
359  ||!strcmp(tag->key, "height")
360  ||!strcmp(tag->key, "videodatarate")
361  ||!strcmp(tag->key, "framerate")
362  ||!strcmp(tag->key, "videocodecid")
363  ||!strcmp(tag->key, "audiodatarate")
364  ||!strcmp(tag->key, "audiosamplerate")
365  ||!strcmp(tag->key, "audiosamplesize")
366  ||!strcmp(tag->key, "stereo")
367  ||!strcmp(tag->key, "audiocodecid")
368  ||!strcmp(tag->key, "duration")
369  ||!strcmp(tag->key, "onMetaData")
370  ||!strcmp(tag->key, "datasize")
371  ||!strcmp(tag->key, "lasttimestamp")
372  ||!strcmp(tag->key, "totalframes")
373  ||!strcmp(tag->key, "hasAudio")
374  ||!strcmp(tag->key, "hasVideo")
375  ||!strcmp(tag->key, "hasCuePoints")
376  ||!strcmp(tag->key, "hasMetadata")
377  ||!strcmp(tag->key, "hasKeyframes")
378  ){
379  av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key);
380  continue;
381  }
382  put_amf_string(pb, tag->key);
384  put_amf_string(pb, tag->value);
385  metadata_count++;
386  }
387 
388  if (write_duration_filesize) {
389  put_amf_string(pb, "filesize");
390  flv->filesize_offset = avio_tell(pb);
391  put_amf_double(pb, 0); // delayed write
392  }
393 
394  if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
395  flv->acurframeindex = 0;
396  flv->keyframe_index_size = 0;
397 
398  put_amf_string(pb, "hasVideo");
399  put_amf_bool(pb, !!flv->video_par);
400  metadata_count++;
401 
402  put_amf_string(pb, "hasKeyframes");
403  put_amf_bool(pb, 1);
404  metadata_count++;
405 
406  put_amf_string(pb, "hasAudio");
407  put_amf_bool(pb, !!flv->audio_par);
408  metadata_count++;
409 
410  put_amf_string(pb, "hasMetadata");
411  put_amf_bool(pb, 1);
412  metadata_count++;
413 
414  put_amf_string(pb, "canSeekToEnd");
415  put_amf_bool(pb, 1);
416  metadata_count++;
417 
418  put_amf_string(pb, "datasize");
419  flv->datasize_offset = avio_tell(pb);
420  flv->datasize = 0;
421  put_amf_double(pb, flv->datasize);
422  metadata_count++;
423 
424  put_amf_string(pb, "videosize");
425  flv->videosize_offset = avio_tell(pb);
426  flv->videosize = 0;
427  put_amf_double(pb, flv->videosize);
428  metadata_count++;
429 
430  put_amf_string(pb, "audiosize");
431  flv->audiosize_offset = avio_tell(pb);
432  flv->audiosize = 0;
433  put_amf_double(pb, flv->audiosize);
434  metadata_count++;
435 
436  put_amf_string(pb, "lasttimestamp");
437  flv->lasttimestamp_offset = avio_tell(pb);
438  flv->lasttimestamp = 0;
439  put_amf_double(pb, 0);
440  metadata_count++;
441 
442  put_amf_string(pb, "lastkeyframetimestamp");
444  flv->lastkeyframetimestamp = 0;
445  put_amf_double(pb, 0);
446  metadata_count++;
447 
448  put_amf_string(pb, "lastkeyframelocation");
450  flv->lastkeyframelocation = 0;
451  put_amf_double(pb, 0);
452  metadata_count++;
453 
454  put_amf_string(pb, "keyframes");
456  metadata_count++;
457 
458  flv->keyframes_info_offset = avio_tell(pb);
459  }
460 
461  put_amf_string(pb, "");
463 
464  /* write total size of tag */
465  flv->metadata_totalsize = avio_tell(pb) - flv->metadata_size_pos - 10;
466 
467  avio_seek(pb, metadata_count_pos, SEEK_SET);
468  avio_wb32(pb, metadata_count);
469 
470  avio_seek(pb, flv->metadata_size_pos, SEEK_SET);
471  avio_wb24(pb, flv->metadata_totalsize);
472  avio_skip(pb, flv->metadata_totalsize + 10 - 3);
474  avio_wb32(pb, flv->metadata_totalsize + 11);
475 }
476 
478  const char* type, int codec_id)
479 {
480  const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
481  av_log(s, AV_LOG_ERROR,
482  "%s codec %s not compatible with flv\n",
483  type,
484  desc ? desc->name : "unknown");
485  return AVERROR(ENOSYS);
486 }
487 
489  int64_t data_size;
490  AVIOContext *pb = s->pb;
491  FLVContext *flv = s->priv_data;
492 
493  if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
494  || par->codec_id == AV_CODEC_ID_MPEG4) {
495  int64_t pos;
496  avio_w8(pb,
499  avio_wb24(pb, 0); // size patched later
500  put_timestamp(pb, ts);
501  avio_wb24(pb, 0); // streamid
502  pos = avio_tell(pb);
503  if (par->codec_id == AV_CODEC_ID_AAC) {
504  avio_w8(pb, get_audio_flags(s, par));
505  avio_w8(pb, 0); // AAC sequence header
506 
507  if (!par->extradata_size && (flv->flags & FLV_AAC_SEQ_HEADER_DETECT)) {
508  PutBitContext pbc;
509  int samplerate_index;
510  int channels = flv->audio_par->channels
511  - (flv->audio_par->channels == 8 ? 1 : 0);
512  uint8_t data[2];
513 
514  for (samplerate_index = 0; samplerate_index < 16;
515  samplerate_index++)
516  if (flv->audio_par->sample_rate
517  == mpeg4audio_sample_rates[samplerate_index])
518  break;
519 
520  init_put_bits(&pbc, data, sizeof(data));
521  put_bits(&pbc, 5, flv->audio_par->profile + 1); //profile
522  put_bits(&pbc, 4, samplerate_index); //sample rate index
523  put_bits(&pbc, 4, channels);
524  put_bits(&pbc, 1, 0); //frame length - 1024 samples
525  put_bits(&pbc, 1, 0); //does not depend on core coder
526  put_bits(&pbc, 1, 0); //is not extension
527  flush_put_bits(&pbc);
528 
529  avio_w8(pb, data[0]);
530  avio_w8(pb, data[1]);
531 
532  av_log(s, AV_LOG_WARNING, "AAC sequence header: %02x %02x.\n",
533  data[0], data[1]);
534  }
535  avio_write(pb, par->extradata, par->extradata_size);
536  } else {
537  avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags
538  avio_w8(pb, 0); // AVC sequence header
539  avio_wb24(pb, 0); // composition time
541  }
542  data_size = avio_tell(pb) - pos;
543  avio_seek(pb, -data_size - 10, SEEK_CUR);
544  avio_wb24(pb, data_size);
545  avio_skip(pb, data_size + 10 - 3);
546  avio_wb32(pb, data_size + 11); // previous tag size
547  }
548 }
549 
550 static int flv_append_keyframe_info(AVFormatContext *s, FLVContext *flv, double ts, int64_t pos)
551 {
552  FLVFileposition *position = av_malloc(sizeof(FLVFileposition));
553 
554  if (!position) {
555  av_log(s, AV_LOG_WARNING, "no mem for add keyframe index!\n");
556  return AVERROR(ENOMEM);
557  }
558 
559  position->keyframe_timestamp = ts;
560  position->keyframe_position = pos;
561 
562  if (!flv->filepositions_count) {
563  flv->filepositions = position;
564  flv->head_filepositions = flv->filepositions;
565  position->next = NULL;
566  } else {
567  flv->filepositions->next = position;
568  position->next = NULL;
569  flv->filepositions = flv->filepositions->next;
570  }
571 
572  flv->filepositions_count++;
573 
574  return 0;
575 }
576 
578 {
579  int ret = 0;
580  int n = 0;
581  int64_t metadata_size = 0;
582  FLVContext *flv = s->priv_data;
583  int64_t pos, pos_end = avio_tell(s->pb); /* Save the pre-shift size. */
584  uint8_t *buf, *read_buf[2];
585  int read_buf_id = 0;
586  int read_size[2];
587  AVIOContext *read_pb;
588 
589  metadata_size = flv->filepositions_count * 9 * 2 + 10; /* filepositions and times value */
590  metadata_size += 2 + 13; /* filepositions String */
591  metadata_size += 2 + 5; /* times String */
592  metadata_size += 3; /* Object end */
593 
594  flv->keyframe_index_size = metadata_size;
595 
596  if (metadata_size < 0)
597  return metadata_size;
598 
599  buf = av_malloc_array(metadata_size, 2);
600  if (!buf) {
601  return AVERROR(ENOMEM);
602  }
603  read_buf[0] = buf;
604  read_buf[1] = buf + metadata_size;
605 
606  avio_seek(s->pb, flv->metadata_size_pos, SEEK_SET);
607  avio_wb24(s->pb, flv->metadata_totalsize + metadata_size);
608 
609  avio_seek(s->pb, flv->metadata_totalsize_pos, SEEK_SET);
610  avio_wb32(s->pb, flv->metadata_totalsize + 11 + metadata_size);
611 
612  /* Shift the data: the AVIO context of the output can only be used for
613  * writing, so we re-open the same output, but for reading. It also avoids
614  * a read/seek/write/seek back and forth. */
615  avio_flush(s->pb);
616  ret = s->io_open(s, &read_pb, s->url, AVIO_FLAG_READ, NULL);
617  if (ret < 0) {
618  av_log(s, AV_LOG_ERROR, "Unable to re-open %s output file for "
619  "the second pass (add_keyframe_index)\n", s->url);
620  goto end;
621  }
622 
623  /* Get ready for writing. */
624  avio_seek(s->pb, flv->keyframes_info_offset + metadata_size, SEEK_SET);
625 
626  /* start reading at where the keyframe index information will be placed */
627  avio_seek(read_pb, flv->keyframes_info_offset, SEEK_SET);
628  pos = avio_tell(read_pb);
629 
630 #define READ_BLOCK do { \
631  read_size[read_buf_id] = avio_read(read_pb, read_buf[read_buf_id], metadata_size); \
632  read_buf_id ^= 1; \
633 } while (0)
634 
635  /* shift data by chunk of at most keyframe *filepositions* and *times* size */
636  READ_BLOCK;
637  do {
638  READ_BLOCK;
639  n = read_size[read_buf_id];
640  if (n < 0)
641  break;
642  avio_write(s->pb, read_buf[read_buf_id], n);
643  pos += n;
644  } while (pos <= pos_end);
645 
646  ff_format_io_close(s, &read_pb);
647 
648 end:
649  av_free(buf);
650  return ret;
651 }
652 
653 static int flv_init(struct AVFormatContext *s)
654 {
655  int i;
656  FLVContext *flv = s->priv_data;
657 
658  for (i = 0; i < s->nb_streams; i++) {
659  AVCodecParameters *par = s->streams[i]->codecpar;
660  FLVStreamContext *sc;
661  switch (par->codec_type) {
662  case AVMEDIA_TYPE_VIDEO:
663  if (s->streams[i]->avg_frame_rate.den &&
664  s->streams[i]->avg_frame_rate.num) {
665  flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
666  }
667  if (flv->video_par) {
668  av_log(s, AV_LOG_ERROR,
669  "at most one video stream is supported in flv\n");
670  return AVERROR(EINVAL);
671  }
672  flv->video_par = par;
673  if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id))
674  return unsupported_codec(s, "Video", par->codec_id);
675 
676  if (par->codec_id == AV_CODEC_ID_MPEG4 ||
677  par->codec_id == AV_CODEC_ID_H263) {
679  av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING,
680  "Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(par->codec_id));
681 
682  if (error) {
683  av_log(s, AV_LOG_ERROR,
684  "use vstrict=-1 / -strict -1 to use it anyway.\n");
685  return AVERROR(EINVAL);
686  }
687  } else if (par->codec_id == AV_CODEC_ID_VP6) {
689  "Muxing VP6 in flv will produce flipped video on playback.\n");
690  }
691  break;
692  case AVMEDIA_TYPE_AUDIO:
693  if (flv->audio_par) {
694  av_log(s, AV_LOG_ERROR,
695  "at most one audio stream is supported in flv\n");
696  return AVERROR(EINVAL);
697  }
698  flv->audio_par = par;
699  if (get_audio_flags(s, par) < 0)
700  return unsupported_codec(s, "Audio", par->codec_id);
701  if (par->codec_id == AV_CODEC_ID_PCM_S16BE)
703  "16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
704  break;
705  case AVMEDIA_TYPE_DATA:
706  if (par->codec_id != AV_CODEC_ID_TEXT && par->codec_id != AV_CODEC_ID_NONE)
707  return unsupported_codec(s, "Data", par->codec_id);
708  flv->data_par = par;
709  break;
711  if (par->codec_id != AV_CODEC_ID_TEXT) {
712  av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n",
713  avcodec_get_name(par->codec_id), i);
714  return AVERROR_INVALIDDATA;
715  }
716  flv->data_par = par;
717  break;
718  default:
719  av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
721  return AVERROR(EINVAL);
722  }
723  avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
724 
725  sc = av_mallocz(sizeof(FLVStreamContext));
726  if (!sc)
727  return AVERROR(ENOMEM);
728  s->streams[i]->priv_data = sc;
729  sc->last_ts = -1;
730  }
731 
732  flv->delay = AV_NOPTS_VALUE;
733 
734  return 0;
735 }
736 
738 {
739  int i;
740  AVIOContext *pb = s->pb;
741  FLVContext *flv = s->priv_data;
742 
743  avio_write(pb, "FLV", 3);
744  avio_w8(pb, 1);
747  avio_wb32(pb, 9);
748  avio_wb32(pb, 0);
749 
750  for (i = 0; i < s->nb_streams; i++)
751  if (s->streams[i]->codecpar->codec_tag == 5) {
752  avio_w8(pb, 8); // message type
753  avio_wb24(pb, 0); // include flags
754  avio_wb24(pb, 0); // time stamp
755  avio_wb32(pb, 0); // reserved
756  avio_wb32(pb, 11); // size
757  flv->reserved = 5;
758  }
759 
760  if (flv->flags & FLV_NO_METADATA) {
761  pb->seekable = 0;
762  } else {
763  write_metadata(s, 0);
764  }
765 
766  for (i = 0; i < s->nb_streams; i++) {
768  }
769 
770  flv->datastart_offset = avio_tell(pb);
771  return 0;
772 }
773 
775 {
776  int64_t file_size;
777  AVIOContext *pb = s->pb;
778  FLVContext *flv = s->priv_data;
779  int build_keyframes_idx = flv->flags & FLV_ADD_KEYFRAME_INDEX;
780  int i, res;
781  int64_t cur_pos = avio_tell(s->pb);
782 
783  if (build_keyframes_idx) {
784  FLVFileposition *newflv_posinfo, *p;
785 
786  avio_seek(pb, flv->videosize_offset, SEEK_SET);
787  put_amf_double(pb, flv->videosize);
788 
789  avio_seek(pb, flv->audiosize_offset, SEEK_SET);
790  put_amf_double(pb, flv->audiosize);
791 
792  avio_seek(pb, flv->lasttimestamp_offset, SEEK_SET);
793  put_amf_double(pb, flv->lasttimestamp);
794 
795  avio_seek(pb, flv->lastkeyframetimestamp_offset, SEEK_SET);
797 
798  avio_seek(pb, flv->lastkeyframelocation_offset, SEEK_SET);
800  avio_seek(pb, cur_pos, SEEK_SET);
801 
802  res = shift_data(s);
803  if (res < 0) {
804  goto end;
805  }
806  avio_seek(pb, flv->keyframes_info_offset, SEEK_SET);
807  put_amf_string(pb, "filepositions");
809  for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
810  put_amf_double(pb, newflv_posinfo->keyframe_position + flv->keyframe_index_size);
811  }
812 
813  put_amf_string(pb, "times");
815  for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
816  put_amf_double(pb, newflv_posinfo->keyframe_timestamp);
817  }
818 
819  newflv_posinfo = flv->head_filepositions;
820  while (newflv_posinfo) {
821  p = newflv_posinfo->next;
822  if (p) {
823  newflv_posinfo->next = p->next;
824  av_free(p);
825  p = NULL;
826  } else {
827  av_free(newflv_posinfo);
828  newflv_posinfo = NULL;
829  }
830  }
831 
832  put_amf_string(pb, "");
834 
835  avio_seek(pb, cur_pos + flv->keyframe_index_size, SEEK_SET);
836  }
837 
838 end:
839  if (flv->flags & FLV_NO_SEQUENCE_END) {
840  av_log(s, AV_LOG_DEBUG, "FLV no sequence end mode open\n");
841  } else {
842  /* Add EOS tag */
843  for (i = 0; i < s->nb_streams; i++) {
844  AVCodecParameters *par = s->streams[i]->codecpar;
845  FLVStreamContext *sc = s->streams[i]->priv_data;
846  if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
848  put_avc_eos_tag(pb, sc->last_ts);
849  }
850  }
851 
852  file_size = avio_tell(pb);
853 
854  if (build_keyframes_idx) {
855  flv->datasize = file_size - flv->datastart_offset;
856  avio_seek(pb, flv->datasize_offset, SEEK_SET);
857  put_amf_double(pb, flv->datasize);
858  }
859  if (!(flv->flags & FLV_NO_METADATA)) {
860  if (!(flv->flags & FLV_NO_DURATION_FILESIZE)) {
861  /* update information */
862  if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0) {
863  av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n");
864  } else {
865  put_amf_double(pb, flv->duration / (double)1000);
866  }
867  if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0) {
868  av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n");
869  } else {
870  put_amf_double(pb, file_size);
871  }
872  }
873  }
874 
875  return 0;
876 }
877 
879 {
880  AVIOContext *pb = s->pb;
882  FLVContext *flv = s->priv_data;
884  unsigned ts;
885  int size = pkt->size;
886  uint8_t *data = NULL;
887  int flags = -1, flags_size, ret = 0;
888  int64_t cur_offset = avio_tell(pb);
889 
890  if (par->codec_type == AVMEDIA_TYPE_AUDIO && !pkt->size) {
891  av_log(s, AV_LOG_WARNING, "Empty audio Packet\n");
892  return AVERROR(EINVAL);
893  }
894 
895  if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
897  flags_size = 2;
898  else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4)
899  flags_size = 5;
900  else
901  flags_size = 1;
902 
903  if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
904  || par->codec_id == AV_CODEC_ID_MPEG4) {
905  int side_size = 0;
907  if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) {
908  ret = ff_alloc_extradata(par, side_size);
909  if (ret < 0)
910  return ret;
911  memcpy(par->extradata, side, side_size);
912  flv_write_codec_header(s, par, pkt->dts);
913  }
914  }
915 
916  if (flv->delay == AV_NOPTS_VALUE)
917  flv->delay = -pkt->dts;
918 
919  if (pkt->dts < -flv->delay) {
921  "Packets are not in the proper order with respect to DTS\n");
922  return AVERROR(EINVAL);
923  }
924  if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
925  if (pkt->pts == AV_NOPTS_VALUE) {
926  av_log(s, AV_LOG_ERROR, "Packet is missing PTS\n");
927  return AVERROR(EINVAL);
928  }
929  }
930 
931  ts = pkt->dts;
932 
934  write_metadata(s, ts);
936  }
937 
940 
941  switch (par->codec_type) {
942  case AVMEDIA_TYPE_VIDEO:
944 
945  flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id);
946 
948  break;
949  case AVMEDIA_TYPE_AUDIO:
950  flags = get_audio_flags(s, par);
951 
952  av_assert0(size);
953 
955  break;
957  case AVMEDIA_TYPE_DATA:
959  break;
960  default:
961  return AVERROR(EINVAL);
962  }
963 
964  if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
965  /* check if extradata looks like mp4 formatted */
966  if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
967  if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0)
968  return ret;
969  } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
970  (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
971  if (!s->streams[pkt->stream_index]->nb_frames) {
972  av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
973  "use the audio bitstream filter 'aac_adtstoasc' to fix it "
974  "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
975  return AVERROR_INVALIDDATA;
976  }
977  av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
978  }
979 
980  /* check Speex packet duration */
981  if (par->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160)
982  av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
983  "8 frames per packet. Adobe Flash "
984  "Player cannot handle this!\n");
985 
986  if (sc->last_ts < ts)
987  sc->last_ts = ts;
988 
989  if (size + flags_size >= 1<<24) {
990  av_log(s, AV_LOG_ERROR, "Too large packet with size %u >= %u\n",
991  size + flags_size, 1<<24);
992  ret = AVERROR(EINVAL);
993  goto fail;
994  }
995 
996  avio_wb24(pb, size + flags_size);
997  put_timestamp(pb, ts);
998  avio_wb24(pb, flv->reserved);
999 
1000  if (par->codec_type == AVMEDIA_TYPE_DATA ||
1001  par->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
1002  int data_size;
1003  int64_t metadata_size_pos = avio_tell(pb);
1004  if (par->codec_id == AV_CODEC_ID_TEXT) {
1005  // legacy FFmpeg magic?
1007  put_amf_string(pb, "onTextData");
1009  avio_wb32(pb, 2);
1010  put_amf_string(pb, "type");
1012  put_amf_string(pb, "Text");
1013  put_amf_string(pb, "text");
1015  put_amf_string(pb, pkt->data);
1016  put_amf_string(pb, "");
1018  } else {
1019  // just pass the metadata through
1020  avio_write(pb, data ? data : pkt->data, size);
1021  }
1022  /* write total size of tag */
1023  data_size = avio_tell(pb) - metadata_size_pos;
1024  avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
1025  avio_wb24(pb, data_size);
1026  avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
1027  avio_wb32(pb, data_size + 11);
1028  } else {
1029  av_assert1(flags>=0);
1030  avio_w8(pb,flags);
1031  if (par->codec_id == AV_CODEC_ID_VP6)
1032  avio_w8(pb,0);
1033  if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A) {
1034  if (par->extradata_size)
1035  avio_w8(pb, par->extradata[0]);
1036  else
1037  avio_w8(pb, ((FFALIGN(par->width, 16) - par->width) << 4) |
1038  (FFALIGN(par->height, 16) - par->height));
1039  } else if (par->codec_id == AV_CODEC_ID_AAC)
1040  avio_w8(pb, 1); // AAC raw
1041  else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
1042  avio_w8(pb, 1); // AVC NALU
1043  avio_wb24(pb, pkt->pts - pkt->dts);
1044  }
1045 
1046  avio_write(pb, data ? data : pkt->data, size);
1047 
1048  avio_wb32(pb, size + flags_size + 11); // previous tag size
1049  flv->duration = FFMAX(flv->duration,
1050  pkt->pts + flv->delay + pkt->duration);
1051  }
1052 
1053  if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
1054  switch (par->codec_type) {
1055  case AVMEDIA_TYPE_VIDEO:
1056  flv->videosize += (avio_tell(pb) - cur_offset);
1057  flv->lasttimestamp = flv->acurframeindex / flv->framerate;
1058  flv->acurframeindex++;
1059  if (pkt->flags & AV_PKT_FLAG_KEY) {
1060  double ts = flv->lasttimestamp;
1061  int64_t pos = cur_offset;
1062 
1063  flv->lastkeyframetimestamp = ts;
1064  flv->lastkeyframelocation = pos;
1065  ret = flv_append_keyframe_info(s, flv, ts, pos);
1066  if (ret < 0)
1067  goto fail;
1068  }
1069  break;
1070 
1071  case AVMEDIA_TYPE_AUDIO:
1072  flv->audiosize += (avio_tell(pb) - cur_offset);
1073  break;
1074 
1075  default:
1076  av_log(s, AV_LOG_WARNING, "par->codec_type is type = [%d]\n", par->codec_type);
1077  break;
1078  }
1079  }
1080 fail:
1081  av_free(data);
1082 
1083  return ret;
1084 }
1085 
1086 static int flv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1087 {
1088  int ret = 1;
1089  AVStream *st = s->streams[pkt->stream_index];
1090 
1091  if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1092  if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
1093  ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
1094  }
1095  return ret;
1096 }
1097 
1098 static const AVOption options[] = {
1099  { "flvflags", "FLV muxer flags", offsetof(FLVContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1100  { "aac_seq_header_detect", "Put AAC sequence header based on stream data", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_AAC_SEQ_HEADER_DETECT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1101  { "no_sequence_end", "disable sequence end for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_SEQUENCE_END}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1102  { "no_metadata", "disable metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_METADATA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1103  { "no_duration_filesize", "disable duration and filesize zero value metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_DURATION_FILESIZE}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1104  { "add_keyframe_index", "Add keyframe index metadata", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_ADD_KEYFRAME_INDEX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1105  { NULL },
1106 };
1107 
1108 static const AVClass flv_muxer_class = {
1109  .class_name = "flv muxer",
1110  .item_name = av_default_item_name,
1111  .option = options,
1112  .version = LIBAVUTIL_VERSION_INT,
1113 };
1114 
1116  .name = "flv",
1117  .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1118  .mime_type = "video/x-flv",
1119  .extensions = "flv",
1120  .priv_data_size = sizeof(FLVContext),
1122  .video_codec = AV_CODEC_ID_FLV1,
1123  .init = flv_init,
1128  .codec_tag = (const AVCodecTag* const []) {
1130  },
1133  .priv_class = &flv_muxer_class,
1134 };
key frame (for AVC, a seekable frame)
Definition: flv.h:116
static void put_amf_dword_array(AVIOContext *pb, uint32_t dw)
Definition: flvenc.c:262
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:701
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:1933
void avio_wb64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:441
#define NULL
Definition: coverity.c:32
static const AVCodecTag flv_audio_codec_ids[]
Definition: flvenc.c:52
int acurframeindex
Definition: flvenc.c:108
#define CONFIG_LIBMP3LAME
Definition: config.h:468
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
Buffered I/O operations.
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:990
int size
AVOutputFormat ff_flv_muxer
Definition: flvenc.c:1115
AVOption.
Definition: opt.h:246
double framerate
Definition: flvenc.c:117
int64_t datastart_offset
Definition: flvenc.c:88
int64_t audiosize_offset
Definition: flvenc.c:93
int64_t delay
first dts delay (needed for AVC & Speex)
Definition: flvenc.c:86
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:208
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4938
const char * desc
Definition: nvenc.c:79
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int64_t duration
Definition: flvenc.c:85
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int num
Numerator.
Definition: rational.h:59
int size
Definition: packet.h:356
const char * b
Definition: vf_curves.c:116
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
#define AVIO_FLAG_READ
read-only
Definition: avio.h:674
static int unsupported_codec(AVFormatContext *s, const char *type, int codec_id)
Definition: flvenc.c:477
static av_always_inline uint64_t av_double2int(double f)
Reinterpret a double as a 64-bit integer.
Definition: intfloat.h:70
static const AVClass flv_muxer_class
Definition: flvenc.c:1108
#define READ_BLOCK
int event_flags
Flags for the user to detect events happening on the file.
Definition: avformat.h:1666
int64_t metadata_totalsize
Definition: flvenc.c:98
void * priv_data
Definition: avformat.h:891
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:3148
double lastkeyframetimestamp
Definition: flvenc.c:104
static AVPacket pkt
static void error(const char *err)
static int get_audio_flags(AVFormatContext *s, AVCodecParameters *par)
Definition: flvenc.c:127
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1659
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:472
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
int64_t keyframe_index_size
Definition: flvenc.c:99
static const AVCodecTag flv_video_codec_ids[]
Definition: flvenc.c:39
static const AVOption options[]
Definition: flvenc.c:1098
Format I/O context.
Definition: avformat.h:1351
Definition: flv.h:75
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
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
internal metadata API header see avformat.h or the public API!
Public dictionary API.
FLVFileposition * head_filepositions
Definition: flvenc.c:113
uint8_t
static void flv_write_codec_header(AVFormatContext *s, AVCodecParameters *par, int64_t ts)
Definition: flvenc.c:488
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:203
int width
Video only.
Definition: codec_par.h:126
AVCodecParameters * video_par
Definition: flvenc.c:116
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:373
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5685
double keyframe_timestamp
Definition: flvenc.c:76
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:471
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
A point in the output bytestream where a demuxer can start parsing (for non self synchronizing bytest...
Definition: avio.h:128
const char data[16]
Definition: mxf.c:91
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
uint8_t * data
Definition: packet.h:355
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
uint32_t tag
Definition: movenc.c:1532
signifies 5512Hz and 8000Hz in the case of NELLYMOSER
Definition: flv.h:84
AVCodecParameters * audio_par
Definition: flvenc.c:115
int64_t keyframes_info_offset
Definition: flvenc.c:109
int64_t metadata_totalsize_pos
Definition: flvenc.c:97
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:213
int64_t lastkeyframelocation_offset
Definition: flvenc.c:105
int64_t datasize_offset
Definition: flvenc.c:89
channels
Definition: aptx.h:33
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:276
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:1593
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:388
static int flv_write_trailer(AVFormatContext *s)
Definition: flvenc.c:774
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
int64_t filepositions_count
Definition: flvenc.c:111
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1591
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:353
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
char * url
input or output URL.
Definition: avformat.h:1447
int64_t videosize
Definition: flvenc.c:92
unsigned int pos
Definition: spdifenc.c:410
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:411
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
int64_t videosize_offset
Definition: flvenc.c:91
static const int mpeg4audio_sample_rates[16]
Definition: aacenctab.h:85
simple assert() macros that are a bit more flexible than ISO C assert().
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5714
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:949
FLVFileposition * filepositions
Definition: flvenc.c:112
#define FFMAX(a, b)
Definition: common.h:94
int ff_avc_parse_nal_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size)
Definition: avc.c:95
#define fail()
Definition: checkasm.h:123
static int flv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
Definition: flvenc.c:1086
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
#define FLV_AUDIO_CODECID_OFFSET
Definition: flv.h:34
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3321
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: flvenc.c:878
int64_t lasttimestamp_offset
Definition: flvenc.c:101
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:98
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:461
inter frame (for AVC, a non-seekable frame)
Definition: flv.h:117
void avio_wb24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:465
const char * name
Definition: avformat.h:500
int64_t lastkeyframelocation
Definition: flvenc.c:106
static int flv_append_keyframe_info(AVFormatContext *s, FLVContext *flv, double ts, int64_t pos)
Definition: flvenc.c:550
#define s(width, name)
Definition: cbs_vp9.c:257
enum AVCodecID codec_id
Definition: vaapi_decode.c:369
struct FLVFileposition * next
Definition: flvenc.c:77
int reserved
Definition: flvenc.c:82
static void put_timestamp(AVIOContext *pb, int64_t ts)
Definition: flvenc.c:234
Stream structure.
Definition: avformat.h:876
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: packet.h:55
FLV common header.
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
static int flv_write_header(AVFormatContext *s)
Definition: flvenc.c:737
AVRational framerate
Definition: flvdec.c:74
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:191
int64_t keyframe_position
Definition: flvenc.c:75
static void put_amf_string(AVIOContext *pb, const char *str)
Definition: flvenc.c:226
static void put_amf_double(AVIOContext *pb, double d)
Definition: flvenc.c:251
AVClass * av_class
Definition: flvenc.c:81
Describe the class of an AVClass context structure.
Definition: log.h:67
cl_device_type type
void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:233
AVCodecParameters * data_par
Definition: flvenc.c:118
static int flv_init(struct AVFormatContext *s)
Definition: flvenc.c:653
int64_t lastkeyframetimestamp_offset
Definition: flvenc.c:103
const char * name
Name of the codec described by this descriptor.
Definition: codec_desc.h:46
int64_t datasize
Definition: flvenc.c:90
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: codec_desc.h:38
AAC encoder data.
#define AMF_END_OF_OBJECT
Definition: flv.h:47
static void put_amf_bool(AVIOContext *pb, int b)
Definition: flvenc.c:268
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:453
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:76
#define flags(name, subs,...)
Definition: cbs_av1.c:564
int sample_rate
Audio only.
Definition: codec_par.h:170
Main libavformat public API header.
int64_t audiosize
Definition: flvenc.c:94
static void put_amf_byte(AVIOContext *pb, unsigned char abyte)
Definition: flvenc.c:257
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
int64_t duration_offset
Definition: flvenc.c:83
raw UTF-8 text
Definition: codec_id.h:510
static void write_metadata(AVFormatContext *s, unsigned int ts)
Definition: flvenc.c:274
int profile
Codec-specific bitstream restrictions that the stream conforms to.
Definition: codec_par.h:120
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:1184
int flags
Definition: flvenc.c:120
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:927
char * key
Definition: dict.h:86
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
int den
Denominator.
Definition: rational.h:60
double lasttimestamp
Definition: flvenc.c:102
static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
Definition: flvenc.c:239
A point in the output bytestream where a decoder can start decoding (i.e.
Definition: avio.h:122
#define AVFMT_VARIABLE_FPS
Format allows variable fps.
Definition: avformat.h:465
#define av_free(p)
char * value
Definition: dict.h:87
int len
int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
Add a bitstream filter to a stream.
Definition: utils.c:5569
void * priv_data
Format private data.
Definition: avformat.h:1379
static int check_bitstream(AVFormatContext *s, AVStream *st, AVPacket *pkt)
Definition: mux.c:1075
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3394
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
int channels
Audio only.
Definition: codec_par.h:166
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:375
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1466
#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
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
#define av_malloc_array(a, b)
int64_t filesize_offset
Definition: flvenc.c:84
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
int64_t metadata_size_pos
Definition: flvenc.c:96
int stream_index
Definition: packet.h:357
This structure stores compressed data.
Definition: packet.h:332
static int shift_data(AVFormatContext *s)
Definition: flvenc.c:577
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
int64_t last_ts
last timestamp for each stream
Definition: flvenc.c:124
FLVFlags
Definition: flvenc.c:66
int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len)
Definition: avc.c:108
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
bitstream writer API