3 * Copyright (c) 2003 The FFmpeg Project
5 * This file is part of FFmpeg.
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.
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.
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
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"
34 #include "libavutil/opt.h"
35 #include "libavcodec/put_bits.h"
36 #include "libavcodec/aacenctab.h"
39 static const AVCodecTag flv_video_codec_ids[] = {
40 { AV_CODEC_ID_FLV1, FLV_CODECID_H263 },
41 { AV_CODEC_ID_H263, FLV_CODECID_REALH263 },
42 { AV_CODEC_ID_MPEG4, FLV_CODECID_MPEG4 },
43 { AV_CODEC_ID_FLASHSV, FLV_CODECID_SCREEN },
44 { AV_CODEC_ID_FLASHSV2, FLV_CODECID_SCREEN2 },
45 { AV_CODEC_ID_VP6F, FLV_CODECID_VP6 },
46 { AV_CODEC_ID_VP6, FLV_CODECID_VP6 },
47 { AV_CODEC_ID_VP6A, FLV_CODECID_VP6A },
48 { AV_CODEC_ID_H264, FLV_CODECID_H264 },
49 { AV_CODEC_ID_NONE, 0 }
52 static const AVCodecTag flv_audio_codec_ids[] = {
53 { AV_CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET },
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 }
67 FLV_AAC_SEQ_HEADER_DETECT = (1 << 0),
68 FLV_NO_SEQUENCE_END = (1 << 1),
69 FLV_ADD_KEYFRAME_INDEX = (1 << 2),
70 FLV_NO_METADATA = (1 << 3),
71 FLV_NO_DURATION_FILESIZE = (1 << 4),
74 typedef struct FLVFileposition {
75 int64_t keyframe_position;
76 double keyframe_timestamp;
77 struct FLVFileposition *next;
80 typedef struct FLVContext {
83 int64_t duration_offset;
84 int64_t filesize_offset;
86 int64_t delay; ///< first dts delay (needed for AVC & Speex)
88 int64_t datastart_offset;
89 int64_t datasize_offset;
91 int64_t videosize_offset;
93 int64_t audiosize_offset;
96 int64_t metadata_size_pos;
97 int64_t metadata_totalsize_pos;
98 int64_t metadata_totalsize;
99 int64_t keyframe_index_size;
101 int64_t lasttimestamp_offset;
102 double lasttimestamp;
103 int64_t lastkeyframetimestamp_offset;
104 double lastkeyframetimestamp;
105 int64_t lastkeyframelocation_offset;
106 int64_t lastkeyframelocation;
109 int64_t keyframes_info_offset;
111 int64_t filepositions_count;
112 FLVFileposition *filepositions;
113 FLVFileposition *head_filepositions;
115 AVCodecParameters *audio_par;
116 AVCodecParameters *video_par;
118 AVCodecParameters *data_par;
123 typedef struct FLVStreamContext {
124 int64_t last_ts; ///< last timestamp for each stream
127 static int get_audio_flags(AVFormatContext *s, AVCodecParameters *par)
129 int flags = (par->bits_per_coded_sample == 16) ? FLV_SAMPLESSIZE_16BIT
130 : FLV_SAMPLESSIZE_8BIT;
132 if (par->codec_id == AV_CODEC_ID_AAC) // specs force these parameters
133 return FLV_CODECID_AAC | FLV_SAMPLERATE_44100HZ |
134 FLV_SAMPLESSIZE_16BIT | FLV_STEREO;
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);
141 if (par->channels != 1) {
142 av_log(s, AV_LOG_ERROR, "FLV only supports mono Speex audio\n");
143 return AVERROR(EINVAL);
145 return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT;
147 switch (par->sample_rate) {
149 // 48khz mp3 is stored with 44k1 samplerate identifer
150 if (par->codec_id == AV_CODEC_ID_MP3) {
151 flags |= FLV_SAMPLERATE_44100HZ;
157 flags |= FLV_SAMPLERATE_44100HZ;
160 flags |= FLV_SAMPLERATE_22050HZ;
163 flags |= FLV_SAMPLERATE_11025HZ;
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;
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);
181 if (par->channels > 1)
184 switch (par->codec_id) {
185 case AV_CODEC_ID_MP3:
186 flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT;
188 case AV_CODEC_ID_PCM_U8:
189 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_8BIT;
191 case AV_CODEC_ID_PCM_S16BE:
192 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_16BIT;
194 case AV_CODEC_ID_PCM_S16LE:
195 flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT;
197 case AV_CODEC_ID_ADPCM_SWF:
198 flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT;
200 case AV_CODEC_ID_NELLYMOSER:
201 if (par->sample_rate == 8000)
202 flags |= FLV_CODECID_NELLYMOSER_8KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
203 else if (par->sample_rate == 16000)
204 flags |= FLV_CODECID_NELLYMOSER_16KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
206 flags |= FLV_CODECID_NELLYMOSER | FLV_SAMPLESSIZE_16BIT;
208 case AV_CODEC_ID_PCM_MULAW:
209 flags = FLV_CODECID_PCM_MULAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
211 case AV_CODEC_ID_PCM_ALAW:
212 flags = FLV_CODECID_PCM_ALAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
215 flags |= par->codec_tag << 4;
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);
226 static void put_amf_string(AVIOContext *pb, const char *str)
228 size_t len = strlen(str);
230 avio_write(pb, str, len);
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);
239 static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
241 avio_w8(pb, FLV_TAG_TYPE_VIDEO);
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 */
251 static void put_amf_double(AVIOContext *pb, double d)
253 avio_w8(pb, AMF_DATA_TYPE_NUMBER);
254 avio_wb64(pb, av_double2int(d));
257 static void put_amf_byte(AVIOContext *pb, unsigned char abyte)
262 static void put_amf_dword_array(AVIOContext *pb, uint32_t dw)
264 avio_w8(pb, AMF_DATA_TYPE_ARRAY);
268 static void put_amf_bool(AVIOContext *pb, int b)
270 avio_w8(pb, AMF_DATA_TYPE_BOOL);
274 static void write_metadata(AVFormatContext *s, unsigned int ts)
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;
281 AVDictionaryEntry *tag = NULL;
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
290 /* now data of data_size size */
292 /* first event name as a string */
293 avio_w8(pb, AMF_DATA_TYPE_STRING);
294 put_amf_string(pb, "onMetaData"); // 12 bytes
296 /* mixed array (hash) with size and string/type/data tuples */
297 avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
298 metadata_count_pos = avio_tell(pb);
299 metadata_count = 4 * !!flv->video_par +
300 5 * !!flv->audio_par +
302 if (write_duration_filesize) {
303 metadata_count += 2; // +2 for duration and file size
305 avio_wb32(pb, metadata_count);
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
311 put_amf_double(pb, s->duration / AV_TIME_BASE);
314 if (flv->video_par) {
315 put_amf_string(pb, "width");
316 put_amf_double(pb, flv->video_par->width);
318 put_amf_string(pb, "height");
319 put_amf_double(pb, flv->video_par->height);
321 put_amf_string(pb, "videodatarate");
322 put_amf_double(pb, flv->video_par->bit_rate / 1024.0);
324 if (flv->framerate != 0.0) {
325 put_amf_string(pb, "framerate");
326 put_amf_double(pb, flv->framerate);
330 put_amf_string(pb, "videocodecid");
331 put_amf_double(pb, flv->video_par->codec_tag);
334 if (flv->audio_par) {
335 put_amf_string(pb, "audiodatarate");
336 put_amf_double(pb, flv->audio_par->bit_rate / 1024.0);
338 put_amf_string(pb, "audiosamplerate");
339 put_amf_double(pb, flv->audio_par->sample_rate);
341 put_amf_string(pb, "audiosamplesize");
342 put_amf_double(pb, flv->audio_par->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);
344 put_amf_string(pb, "stereo");
345 put_amf_bool(pb, flv->audio_par->channels == 2);
347 put_amf_string(pb, "audiocodecid");
348 put_amf_double(pb, flv->audio_par->codec_tag);
352 put_amf_string(pb, "datastream");
353 put_amf_double(pb, 0.0);
356 ff_standardize_creation_time(s);
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")
379 av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key);
382 put_amf_string(pb, tag->key);
383 avio_w8(pb, AMF_DATA_TYPE_STRING);
384 put_amf_string(pb, tag->value);
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
394 if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
395 flv->acurframeindex = 0;
396 flv->keyframe_index_size = 0;
398 put_amf_string(pb, "hasVideo");
399 put_amf_bool(pb, !!flv->video_par);
402 put_amf_string(pb, "hasKeyframes");
406 put_amf_string(pb, "hasAudio");
407 put_amf_bool(pb, !!flv->audio_par);
410 put_amf_string(pb, "hasMetadata");
414 put_amf_string(pb, "canSeekToEnd");
418 put_amf_string(pb, "datasize");
419 flv->datasize_offset = avio_tell(pb);
421 put_amf_double(pb, flv->datasize);
424 put_amf_string(pb, "videosize");
425 flv->videosize_offset = avio_tell(pb);
427 put_amf_double(pb, flv->videosize);
430 put_amf_string(pb, "audiosize");
431 flv->audiosize_offset = avio_tell(pb);
433 put_amf_double(pb, flv->audiosize);
436 put_amf_string(pb, "lasttimestamp");
437 flv->lasttimestamp_offset = avio_tell(pb);
438 flv->lasttimestamp = 0;
439 put_amf_double(pb, 0);
442 put_amf_string(pb, "lastkeyframetimestamp");
443 flv->lastkeyframetimestamp_offset = avio_tell(pb);
444 flv->lastkeyframetimestamp = 0;
445 put_amf_double(pb, 0);
448 put_amf_string(pb, "lastkeyframelocation");
449 flv->lastkeyframelocation_offset = avio_tell(pb);
450 flv->lastkeyframelocation = 0;
451 put_amf_double(pb, 0);
454 put_amf_string(pb, "keyframes");
455 put_amf_byte(pb, AMF_DATA_TYPE_OBJECT);
458 flv->keyframes_info_offset = avio_tell(pb);
461 put_amf_string(pb, "");
462 avio_w8(pb, AMF_END_OF_OBJECT);
464 /* write total size of tag */
465 flv->metadata_totalsize = avio_tell(pb) - flv->metadata_size_pos - 10;
467 avio_seek(pb, metadata_count_pos, SEEK_SET);
468 avio_wb32(pb, metadata_count);
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);
473 flv->metadata_totalsize_pos = avio_tell(pb);
474 avio_wb32(pb, flv->metadata_totalsize + 11);
477 static int unsupported_codec(AVFormatContext *s,
478 const char* type, int codec_id)
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",
484 desc ? desc->name : "unknown");
485 return AVERROR(ENOSYS);
488 static void flv_write_codec_header(AVFormatContext* s, AVCodecParameters* par, int64_t ts) {
490 AVIOContext *pb = s->pb;
491 FLVContext *flv = s->priv_data;
493 if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
494 || par->codec_id == AV_CODEC_ID_MPEG4) {
497 par->codec_type == AVMEDIA_TYPE_VIDEO ?
498 FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO);
499 avio_wb24(pb, 0); // size patched later
500 put_timestamp(pb, ts);
501 avio_wb24(pb, 0); // streamid
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
507 if (!par->extradata_size && (flv->flags & FLV_AAC_SEQ_HEADER_DETECT)) {
509 int samplerate_index;
510 int channels = flv->audio_par->channels
511 - (flv->audio_par->channels == 8 ? 1 : 0);
514 for (samplerate_index = 0; samplerate_index < 16;
516 if (flv->audio_par->sample_rate
517 == mpeg4audio_sample_rates[samplerate_index])
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);
529 avio_w8(pb, data[0]);
530 avio_w8(pb, data[1]);
532 av_log(s, AV_LOG_WARNING, "AAC sequence header: %02x %02x.\n",
535 avio_write(pb, par->extradata, par->extradata_size);
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
540 ff_isom_write_avcc(pb, par->extradata, par->extradata_size);
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
550 static int flv_append_keyframe_info(AVFormatContext *s, FLVContext *flv, double ts, int64_t pos)
552 FLVFileposition *position = av_malloc(sizeof(FLVFileposition));
555 av_log(s, AV_LOG_WARNING, "no mem for add keyframe index!\n");
556 return AVERROR(ENOMEM);
559 position->keyframe_timestamp = ts;
560 position->keyframe_position = pos;
562 if (!flv->filepositions_count) {
563 flv->filepositions = position;
564 flv->head_filepositions = flv->filepositions;
565 position->next = NULL;
567 flv->filepositions->next = position;
568 position->next = NULL;
569 flv->filepositions = flv->filepositions->next;
572 flv->filepositions_count++;
577 static int shift_data(AVFormatContext *s)
581 int64_t metadata_size = 0;
582 FLVContext *flv = s->priv_data;
583 int64_t pos, pos_end = avio_tell(s->pb);
584 uint8_t *buf, *read_buf[2];
587 AVIOContext *read_pb;
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 */
594 flv->keyframe_index_size = metadata_size;
596 if (metadata_size < 0)
597 return metadata_size;
599 buf = av_malloc_array(metadata_size, 2);
601 return AVERROR(ENOMEM);
604 read_buf[1] = buf + metadata_size;
606 avio_seek(s->pb, flv->metadata_size_pos, SEEK_SET);
607 avio_wb24(s->pb, flv->metadata_totalsize + metadata_size);
609 avio_seek(s->pb, flv->metadata_totalsize_pos, SEEK_SET);
610 avio_wb32(s->pb, flv->metadata_totalsize + 11 + metadata_size);
611 avio_seek(s->pb, pos_end, SEEK_SET);
613 /* Shift the data: the AVIO context of the output can only be used for
614 * writing, so we re-open the same output, but for reading. It also avoids
615 * a read/seek/write/seek back and forth. */
617 ret = s->io_open(s, &read_pb, s->url, AVIO_FLAG_READ, NULL);
619 av_log(s, AV_LOG_ERROR, "Unable to re-open %s output file for "
620 "the second pass (add_keyframe_index)\n", s->url);
624 /* mark the end of the shift to up to the last data we wrote, and get ready
626 pos_end = avio_tell(s->pb);
627 avio_seek(s->pb, flv->keyframes_info_offset + metadata_size, SEEK_SET);
629 /* start reading at where the keyframe index information will be placed */
630 avio_seek(read_pb, flv->keyframes_info_offset, SEEK_SET);
631 pos = avio_tell(read_pb);
633 #define READ_BLOCK do { \
634 read_size[read_buf_id] = avio_read(read_pb, read_buf[read_buf_id], metadata_size); \
638 /* shift data by chunk of at most keyframe *filepositions* and *times* size */
642 n = read_size[read_buf_id];
645 avio_write(s->pb, read_buf[read_buf_id], n);
647 } while (pos <= pos_end);
649 ff_format_io_close(s, &read_pb);
657 static int flv_write_header(AVFormatContext *s)
660 AVIOContext *pb = s->pb;
661 FLVContext *flv = s->priv_data;
663 for (i = 0; i < s->nb_streams; i++) {
664 AVCodecParameters *par = s->streams[i]->codecpar;
665 FLVStreamContext *sc;
666 switch (par->codec_type) {
667 case AVMEDIA_TYPE_VIDEO:
668 if (s->streams[i]->avg_frame_rate.den &&
669 s->streams[i]->avg_frame_rate.num) {
670 flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
672 if (flv->video_par) {
673 av_log(s, AV_LOG_ERROR,
674 "at most one video stream is supported in flv\n");
675 return AVERROR(EINVAL);
677 flv->video_par = par;
678 if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id))
679 return unsupported_codec(s, "Video", par->codec_id);
681 if (par->codec_id == AV_CODEC_ID_MPEG4 ||
682 par->codec_id == AV_CODEC_ID_H263) {
683 int error = s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL;
684 av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING,
685 "Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(par->codec_id));
688 av_log(s, AV_LOG_ERROR,
689 "use vstrict=-1 / -strict -1 to use it anyway.\n");
690 return AVERROR(EINVAL);
692 } else if (par->codec_id == AV_CODEC_ID_VP6) {
693 av_log(s, AV_LOG_WARNING,
694 "Muxing VP6 in flv will produce flipped video on playback.\n");
697 case AVMEDIA_TYPE_AUDIO:
698 if (flv->audio_par) {
699 av_log(s, AV_LOG_ERROR,
700 "at most one audio stream is supported in flv\n");
701 return AVERROR(EINVAL);
703 flv->audio_par = par;
704 if (get_audio_flags(s, par) < 0)
705 return unsupported_codec(s, "Audio", par->codec_id);
706 if (par->codec_id == AV_CODEC_ID_PCM_S16BE)
707 av_log(s, AV_LOG_WARNING,
708 "16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
710 case AVMEDIA_TYPE_DATA:
711 if (par->codec_id != AV_CODEC_ID_TEXT && par->codec_id != AV_CODEC_ID_NONE)
712 return unsupported_codec(s, "Data", par->codec_id);
715 case AVMEDIA_TYPE_SUBTITLE:
716 if (par->codec_id != AV_CODEC_ID_TEXT) {
717 av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n",
718 avcodec_get_name(par->codec_id), i);
719 return AVERROR_INVALIDDATA;
724 av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
725 av_get_media_type_string(par->codec_type), i);
726 return AVERROR(EINVAL);
728 avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
730 sc = av_mallocz(sizeof(FLVStreamContext));
732 return AVERROR(ENOMEM);
733 s->streams[i]->priv_data = sc;
737 flv->delay = AV_NOPTS_VALUE;
739 avio_write(pb, "FLV", 3);
741 avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!flv->audio_par +
742 FLV_HEADER_FLAG_HASVIDEO * !!flv->video_par);
746 for (i = 0; i < s->nb_streams; i++)
747 if (s->streams[i]->codecpar->codec_tag == 5) {
748 avio_w8(pb, 8); // message type
749 avio_wb24(pb, 0); // include flags
750 avio_wb24(pb, 0); // time stamp
751 avio_wb32(pb, 0); // reserved
752 avio_wb32(pb, 11); // size
756 if (flv->flags & FLV_NO_METADATA) {
759 write_metadata(s, 0);
762 for (i = 0; i < s->nb_streams; i++) {
763 flv_write_codec_header(s, s->streams[i]->codecpar, 0);
766 flv->datastart_offset = avio_tell(pb);
770 static int flv_write_trailer(AVFormatContext *s)
773 AVIOContext *pb = s->pb;
774 FLVContext *flv = s->priv_data;
775 int build_keyframes_idx = flv->flags & FLV_ADD_KEYFRAME_INDEX;
777 int64_t cur_pos = avio_tell(s->pb);
779 if (build_keyframes_idx) {
780 FLVFileposition *newflv_posinfo, *p;
782 avio_seek(pb, flv->videosize_offset, SEEK_SET);
783 put_amf_double(pb, flv->videosize);
785 avio_seek(pb, flv->audiosize_offset, SEEK_SET);
786 put_amf_double(pb, flv->audiosize);
788 avio_seek(pb, flv->lasttimestamp_offset, SEEK_SET);
789 put_amf_double(pb, flv->lasttimestamp);
791 avio_seek(pb, flv->lastkeyframetimestamp_offset, SEEK_SET);
792 put_amf_double(pb, flv->lastkeyframetimestamp);
794 avio_seek(pb, flv->lastkeyframelocation_offset, SEEK_SET);
795 put_amf_double(pb, flv->lastkeyframelocation + flv->keyframe_index_size);
796 avio_seek(pb, cur_pos, SEEK_SET);
802 avio_seek(pb, flv->keyframes_info_offset, SEEK_SET);
803 put_amf_string(pb, "filepositions");
804 put_amf_dword_array(pb, flv->filepositions_count);
805 for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
806 put_amf_double(pb, newflv_posinfo->keyframe_position + flv->keyframe_index_size);
809 put_amf_string(pb, "times");
810 put_amf_dword_array(pb, flv->filepositions_count);
811 for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
812 put_amf_double(pb, newflv_posinfo->keyframe_timestamp);
815 newflv_posinfo = flv->head_filepositions;
816 while (newflv_posinfo) {
817 p = newflv_posinfo->next;
819 newflv_posinfo->next = p->next;
823 av_free(newflv_posinfo);
824 newflv_posinfo = NULL;
828 put_amf_string(pb, "");
829 avio_w8(pb, AMF_END_OF_OBJECT);
831 avio_seek(pb, cur_pos + flv->keyframe_index_size, SEEK_SET);
835 if (flv->flags & FLV_NO_SEQUENCE_END) {
836 av_log(s, AV_LOG_DEBUG, "FLV no sequence end mode open\n");
839 for (i = 0; i < s->nb_streams; i++) {
840 AVCodecParameters *par = s->streams[i]->codecpar;
841 FLVStreamContext *sc = s->streams[i]->priv_data;
842 if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
843 (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4))
844 put_avc_eos_tag(pb, sc->last_ts);
848 file_size = avio_tell(pb);
850 if (build_keyframes_idx) {
851 flv->datasize = file_size - flv->datastart_offset;
852 avio_seek(pb, flv->datasize_offset, SEEK_SET);
853 put_amf_double(pb, flv->datasize);
855 if (!(flv->flags & FLV_NO_METADATA)) {
856 if (!(flv->flags & FLV_NO_DURATION_FILESIZE)) {
857 /* update information */
858 if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0) {
859 av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n");
861 put_amf_double(pb, flv->duration / (double)1000);
863 if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0) {
864 av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n");
866 put_amf_double(pb, file_size);
874 static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
876 AVIOContext *pb = s->pb;
877 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
878 FLVContext *flv = s->priv_data;
879 FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data;
881 int size = pkt->size;
882 uint8_t *data = NULL;
883 int flags = -1, flags_size, ret;
884 int64_t cur_offset = avio_tell(pb);
886 if (par->codec_type == AVMEDIA_TYPE_AUDIO && !pkt->size) {
887 av_log(s, AV_LOG_WARNING, "Empty audio Packet\n");
888 return AVERROR(EINVAL);
891 if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
892 par->codec_id == AV_CODEC_ID_VP6 || par->codec_id == AV_CODEC_ID_AAC)
894 else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4)
899 if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
900 || par->codec_id == AV_CODEC_ID_MPEG4) {
902 uint8_t *side = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
903 if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) {
904 av_free(par->extradata);
905 par->extradata = av_mallocz(side_size + AV_INPUT_BUFFER_PADDING_SIZE);
906 if (!par->extradata) {
907 par->extradata_size = 0;
908 return AVERROR(ENOMEM);
910 memcpy(par->extradata, side, side_size);
911 par->extradata_size = side_size;
912 flv_write_codec_header(s, par, pkt->dts);
916 if (flv->delay == AV_NOPTS_VALUE)
917 flv->delay = -pkt->dts;
919 if (pkt->dts < -flv->delay) {
920 av_log(s, AV_LOG_WARNING,
921 "Packets are not in the proper order with respect to DTS\n");
922 return AVERROR(EINVAL);
927 if (s->event_flags & AVSTREAM_EVENT_FLAG_METADATA_UPDATED) {
928 write_metadata(s, ts);
929 s->event_flags &= ~AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
932 avio_write_marker(pb, av_rescale(ts, AV_TIME_BASE, 1000),
933 pkt->flags & AV_PKT_FLAG_KEY && (flv->video_par ? par->codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
935 switch (par->codec_type) {
936 case AVMEDIA_TYPE_VIDEO:
937 avio_w8(pb, FLV_TAG_TYPE_VIDEO);
939 flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id);
941 flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
943 case AVMEDIA_TYPE_AUDIO:
944 flags = get_audio_flags(s, par);
948 avio_w8(pb, FLV_TAG_TYPE_AUDIO);
950 case AVMEDIA_TYPE_SUBTITLE:
951 case AVMEDIA_TYPE_DATA:
952 avio_w8(pb, FLV_TAG_TYPE_META);
955 return AVERROR(EINVAL);
958 if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
959 /* check if extradata looks like mp4 formatted */
960 if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
961 if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0)
963 } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
964 (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
965 if (!s->streams[pkt->stream_index]->nb_frames) {
966 av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
967 "use the audio bitstream filter 'aac_adtstoasc' to fix it "
968 "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
969 return AVERROR_INVALIDDATA;
971 av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
974 /* check Speex packet duration */
975 if (par->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160)
976 av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
977 "8 frames per packet. Adobe Flash "
978 "Player cannot handle this!\n");
980 if (sc->last_ts < ts)
983 if (size + flags_size >= 1<<24) {
984 av_log(s, AV_LOG_ERROR, "Too large packet with size %u >= %u\n",
985 size + flags_size, 1<<24);
986 return AVERROR(EINVAL);
989 avio_wb24(pb, size + flags_size);
990 put_timestamp(pb, ts);
991 avio_wb24(pb, flv->reserved);
993 if (par->codec_type == AVMEDIA_TYPE_DATA ||
994 par->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
996 int64_t metadata_size_pos = avio_tell(pb);
997 if (par->codec_id == AV_CODEC_ID_TEXT) {
998 // legacy FFmpeg magic?
999 avio_w8(pb, AMF_DATA_TYPE_STRING);
1000 put_amf_string(pb, "onTextData");
1001 avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
1003 put_amf_string(pb, "type");
1004 avio_w8(pb, AMF_DATA_TYPE_STRING);
1005 put_amf_string(pb, "Text");
1006 put_amf_string(pb, "text");
1007 avio_w8(pb, AMF_DATA_TYPE_STRING);
1008 put_amf_string(pb, pkt->data);
1009 put_amf_string(pb, "");
1010 avio_w8(pb, AMF_END_OF_OBJECT);
1012 // just pass the metadata through
1013 avio_write(pb, data ? data : pkt->data, size);
1015 /* write total size of tag */
1016 data_size = avio_tell(pb) - metadata_size_pos;
1017 avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
1018 avio_wb24(pb, data_size);
1019 avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
1020 avio_wb32(pb, data_size + 11);
1022 av_assert1(flags>=0);
1024 if (par->codec_id == AV_CODEC_ID_VP6)
1026 if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A) {
1027 if (par->extradata_size)
1028 avio_w8(pb, par->extradata[0]);
1030 avio_w8(pb, ((FFALIGN(par->width, 16) - par->width) << 4) |
1031 (FFALIGN(par->height, 16) - par->height));
1032 } else if (par->codec_id == AV_CODEC_ID_AAC)
1033 avio_w8(pb, 1); // AAC raw
1034 else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
1035 avio_w8(pb, 1); // AVC NALU
1036 avio_wb24(pb, pkt->pts - pkt->dts);
1039 avio_write(pb, data ? data : pkt->data, size);
1041 avio_wb32(pb, size + flags_size + 11); // previous tag size
1042 flv->duration = FFMAX(flv->duration,
1043 pkt->pts + flv->delay + pkt->duration);
1046 if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
1047 switch (par->codec_type) {
1048 case AVMEDIA_TYPE_VIDEO:
1049 flv->videosize += (avio_tell(pb) - cur_offset);
1050 flv->lasttimestamp = flv->acurframeindex / flv->framerate;
1051 if (pkt->flags & AV_PKT_FLAG_KEY) {
1052 double ts = flv->acurframeindex / flv->framerate;
1053 int64_t pos = cur_offset;
1055 flv->lastkeyframetimestamp = flv->acurframeindex / flv->framerate;
1056 flv->lastkeyframelocation = pos;
1057 flv_append_keyframe_info(s, flv, ts, pos);
1059 flv->acurframeindex++;
1062 case AVMEDIA_TYPE_AUDIO:
1063 flv->audiosize += (avio_tell(pb) - cur_offset);
1067 av_log(s, AV_LOG_WARNING, "par->codec_type is type = [%d]\n", par->codec_type);
1077 static const AVOption options[] = {
1078 { "flvflags", "FLV muxer flags", offsetof(FLVContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1079 { "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" },
1080 { "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" },
1081 { "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" },
1082 { "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" },
1083 { "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" },
1087 static const AVClass flv_muxer_class = {
1088 .class_name = "flv muxer",
1089 .item_name = av_default_item_name,
1091 .version = LIBAVUTIL_VERSION_INT,
1094 AVOutputFormat ff_flv_muxer = {
1096 .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1097 .mime_type = "video/x-flv",
1098 .extensions = "flv",
1099 .priv_data_size = sizeof(FLVContext),
1100 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF,
1101 .video_codec = AV_CODEC_ID_FLV1,
1102 .write_header = flv_write_header,
1103 .write_packet = flv_write_packet,
1104 .write_trailer = flv_write_trailer,
1105 .codec_tag = (const AVCodecTag* const []) {
1106 flv_video_codec_ids, flv_audio_codec_ids, 0
1108 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
1110 .priv_class = &flv_muxer_class,