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"
32 #include "libavutil/opt.h"
33 #include "libavcodec/put_bits.h"
34 #include "libavcodec/aacenctab.h"
37 static const AVCodecTag flv_video_codec_ids[] = {
38 { AV_CODEC_ID_FLV1, FLV_CODECID_H263 },
39 { AV_CODEC_ID_H263, FLV_CODECID_REALH263 },
40 { AV_CODEC_ID_MPEG4, FLV_CODECID_MPEG4 },
41 { AV_CODEC_ID_FLASHSV, FLV_CODECID_SCREEN },
42 { AV_CODEC_ID_FLASHSV2, FLV_CODECID_SCREEN2 },
43 { AV_CODEC_ID_VP6F, FLV_CODECID_VP6 },
44 { AV_CODEC_ID_VP6, FLV_CODECID_VP6 },
45 { AV_CODEC_ID_VP6A, FLV_CODECID_VP6A },
46 { AV_CODEC_ID_H264, FLV_CODECID_H264 },
47 { AV_CODEC_ID_NONE, 0 }
50 static const AVCodecTag flv_audio_codec_ids[] = {
51 { AV_CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET },
52 { AV_CODEC_ID_PCM_U8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
53 { AV_CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
54 { AV_CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET },
55 { AV_CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET },
56 { AV_CODEC_ID_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET },
57 { AV_CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET },
58 { AV_CODEC_ID_PCM_MULAW, FLV_CODECID_PCM_MULAW >> FLV_AUDIO_CODECID_OFFSET },
59 { AV_CODEC_ID_PCM_ALAW, FLV_CODECID_PCM_ALAW >> FLV_AUDIO_CODECID_OFFSET },
60 { AV_CODEC_ID_SPEEX, FLV_CODECID_SPEEX >> FLV_AUDIO_CODECID_OFFSET },
61 { AV_CODEC_ID_NONE, 0 }
65 FLV_AAC_SEQ_HEADER_DETECT = (1 << 0),
66 FLV_NO_SEQUENCE_END = (1 << 1),
69 typedef struct FLVContext {
72 int64_t duration_offset;
73 int64_t filesize_offset;
75 int64_t delay; ///< first dts delay (needed for AVC & Speex)
77 AVCodecParameters *audio_par;
78 AVCodecParameters *video_par;
80 AVCodecParameters *data_par;
85 typedef struct FLVStreamContext {
86 int64_t last_ts; ///< last timestamp for each stream
89 static int get_audio_flags(AVFormatContext *s, AVCodecParameters *par)
91 int flags = (par->bits_per_coded_sample == 16) ? FLV_SAMPLESSIZE_16BIT
92 : FLV_SAMPLESSIZE_8BIT;
94 if (par->codec_id == AV_CODEC_ID_AAC) // specs force these parameters
95 return FLV_CODECID_AAC | FLV_SAMPLERATE_44100HZ |
96 FLV_SAMPLESSIZE_16BIT | FLV_STEREO;
97 else if (par->codec_id == AV_CODEC_ID_SPEEX) {
98 if (par->sample_rate != 16000) {
99 av_log(s, AV_LOG_ERROR,
100 "FLV only supports wideband (16kHz) Speex audio\n");
101 return AVERROR(EINVAL);
103 if (par->channels != 1) {
104 av_log(s, AV_LOG_ERROR, "FLV only supports mono Speex audio\n");
105 return AVERROR(EINVAL);
107 return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT;
109 switch (par->sample_rate) {
111 flags |= FLV_SAMPLERATE_44100HZ;
114 flags |= FLV_SAMPLERATE_22050HZ;
117 flags |= FLV_SAMPLERATE_11025HZ;
119 case 16000: // nellymoser only
120 case 8000: // nellymoser only
121 case 5512: // not MP3
122 if (par->codec_id != AV_CODEC_ID_MP3) {
123 flags |= FLV_SAMPLERATE_SPECIAL;
127 av_log(s, AV_LOG_ERROR,
128 "FLV does not support sample rate %d, "
129 "choose from (44100, 22050, 11025)\n", par->sample_rate);
130 return AVERROR(EINVAL);
134 if (par->channels > 1)
137 switch (par->codec_id) {
138 case AV_CODEC_ID_MP3:
139 flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT;
141 case AV_CODEC_ID_PCM_U8:
142 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_8BIT;
144 case AV_CODEC_ID_PCM_S16BE:
145 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_16BIT;
147 case AV_CODEC_ID_PCM_S16LE:
148 flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT;
150 case AV_CODEC_ID_ADPCM_SWF:
151 flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT;
153 case AV_CODEC_ID_NELLYMOSER:
154 if (par->sample_rate == 8000)
155 flags |= FLV_CODECID_NELLYMOSER_8KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
156 else if (par->sample_rate == 16000)
157 flags |= FLV_CODECID_NELLYMOSER_16KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
159 flags |= FLV_CODECID_NELLYMOSER | FLV_SAMPLESSIZE_16BIT;
161 case AV_CODEC_ID_PCM_MULAW:
162 flags = FLV_CODECID_PCM_MULAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
164 case AV_CODEC_ID_PCM_ALAW:
165 flags = FLV_CODECID_PCM_ALAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
168 flags |= par->codec_tag << 4;
171 av_log(s, AV_LOG_ERROR, "Audio codec '%s' not compatible with FLV\n",
172 avcodec_get_name(par->codec_id));
173 return AVERROR(EINVAL);
179 static void put_amf_string(AVIOContext *pb, const char *str)
181 size_t len = strlen(str);
183 avio_write(pb, str, len);
186 static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
188 avio_w8(pb, FLV_TAG_TYPE_VIDEO);
189 avio_wb24(pb, 5); /* Tag Data Size */
190 avio_wb24(pb, ts); /* lower 24 bits of timestamp in ms */
191 avio_w8(pb, (ts >> 24) & 0x7F); /* MSB of ts in ms */
192 avio_wb24(pb, 0); /* StreamId = 0 */
193 avio_w8(pb, 23); /* ub[4] FrameType = 1, ub[4] CodecId = 7 */
194 avio_w8(pb, 2); /* AVC end of sequence */
195 avio_wb24(pb, 0); /* Always 0 for AVC EOS. */
196 avio_wb32(pb, 16); /* Size of FLV tag */
199 static void put_amf_double(AVIOContext *pb, double d)
201 avio_w8(pb, AMF_DATA_TYPE_NUMBER);
202 avio_wb64(pb, av_double2int(d));
205 static void put_amf_bool(AVIOContext *pb, int b)
207 avio_w8(pb, AMF_DATA_TYPE_BOOL);
211 static void write_metadata(AVFormatContext *s, unsigned int ts)
213 AVIOContext *pb = s->pb;
214 FLVContext *flv = s->priv_data;
215 int metadata_count = 0;
216 int64_t metadata_size_pos, data_size, metadata_count_pos;
217 AVDictionaryEntry *tag = NULL;
220 avio_w8(pb, 18); // tag type META
221 metadata_size_pos = avio_tell(pb);
222 avio_wb24(pb, 0); // size of data part (sum of all parts below)
223 avio_wb24(pb, ts); // timestamp
224 avio_wb32(pb, 0); // reserved
226 /* now data of data_size size */
228 /* first event name as a string */
229 avio_w8(pb, AMF_DATA_TYPE_STRING);
230 put_amf_string(pb, "onMetaData"); // 12 bytes
232 /* mixed array (hash) with size and string/type/data tuples */
233 avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
234 metadata_count_pos = avio_tell(pb);
235 metadata_count = 4 * !!flv->video_par +
236 5 * !!flv->audio_par +
237 1 * !!flv->data_par +
238 2; // +2 for duration and file size
240 avio_wb32(pb, metadata_count);
242 put_amf_string(pb, "duration");
243 flv->duration_offset = avio_tell(pb);
245 // fill in the guessed duration, it'll be corrected later if incorrect
246 put_amf_double(pb, s->duration / AV_TIME_BASE);
248 if (flv->video_par) {
249 put_amf_string(pb, "width");
250 put_amf_double(pb, flv->video_par->width);
252 put_amf_string(pb, "height");
253 put_amf_double(pb, flv->video_par->height);
255 put_amf_string(pb, "videodatarate");
256 put_amf_double(pb, flv->video_par->bit_rate / 1024.0);
258 if (flv->framerate != 0.0) {
259 put_amf_string(pb, "framerate");
260 put_amf_double(pb, flv->framerate);
264 put_amf_string(pb, "videocodecid");
265 put_amf_double(pb, flv->video_par->codec_tag);
268 if (flv->audio_par) {
269 put_amf_string(pb, "audiodatarate");
270 put_amf_double(pb, flv->audio_par->bit_rate / 1024.0);
272 put_amf_string(pb, "audiosamplerate");
273 put_amf_double(pb, flv->audio_par->sample_rate);
275 put_amf_string(pb, "audiosamplesize");
276 put_amf_double(pb, flv->audio_par->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);
278 put_amf_string(pb, "stereo");
279 put_amf_bool(pb, flv->audio_par->channels == 2);
281 put_amf_string(pb, "audiocodecid");
282 put_amf_double(pb, flv->audio_par->codec_tag);
286 put_amf_string(pb, "datastream");
287 put_amf_double(pb, 0.0);
290 ff_standardize_creation_time(s);
291 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
292 if( !strcmp(tag->key, "width")
293 ||!strcmp(tag->key, "height")
294 ||!strcmp(tag->key, "videodatarate")
295 ||!strcmp(tag->key, "framerate")
296 ||!strcmp(tag->key, "videocodecid")
297 ||!strcmp(tag->key, "audiodatarate")
298 ||!strcmp(tag->key, "audiosamplerate")
299 ||!strcmp(tag->key, "audiosamplesize")
300 ||!strcmp(tag->key, "stereo")
301 ||!strcmp(tag->key, "audiocodecid")
302 ||!strcmp(tag->key, "duration")
303 ||!strcmp(tag->key, "onMetaData")
304 ||!strcmp(tag->key, "datasize")
305 ||!strcmp(tag->key, "lasttimestamp")
306 ||!strcmp(tag->key, "totalframes")
307 ||!strcmp(tag->key, "hasAudio")
308 ||!strcmp(tag->key, "hasVideo")
309 ||!strcmp(tag->key, "hasCuePoints")
310 ||!strcmp(tag->key, "hasMetadata")
311 ||!strcmp(tag->key, "hasKeyframes")
313 av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key);
316 put_amf_string(pb, tag->key);
317 avio_w8(pb, AMF_DATA_TYPE_STRING);
318 put_amf_string(pb, tag->value);
322 put_amf_string(pb, "filesize");
323 flv->filesize_offset = avio_tell(pb);
324 put_amf_double(pb, 0); // delayed write
326 put_amf_string(pb, "");
327 avio_w8(pb, AMF_END_OF_OBJECT);
329 /* write total size of tag */
330 data_size = avio_tell(pb) - metadata_size_pos - 10;
332 avio_seek(pb, metadata_count_pos, SEEK_SET);
333 avio_wb32(pb, metadata_count);
335 avio_seek(pb, metadata_size_pos, SEEK_SET);
336 avio_wb24(pb, data_size);
337 avio_skip(pb, data_size + 10 - 3);
338 avio_wb32(pb, data_size + 11);
341 static int unsupported_codec(AVFormatContext *s,
342 const char* type, int codec_id)
344 const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
345 av_log(s, AV_LOG_ERROR,
346 "%s codec %s not compatible with flv\n",
348 desc ? desc->name : "unknown");
349 return AVERROR(ENOSYS);
352 static void flv_write_codec_header(AVFormatContext* s, AVCodecParameters* par) {
354 AVIOContext *pb = s->pb;
355 FLVContext *flv = s->priv_data;
357 if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
358 || par->codec_id == AV_CODEC_ID_MPEG4) {
361 par->codec_type == AVMEDIA_TYPE_VIDEO ?
362 FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO);
363 avio_wb24(pb, 0); // size patched later
364 avio_wb24(pb, 0); // ts
365 avio_w8(pb, 0); // ts ext
366 avio_wb24(pb, 0); // streamid
368 if (par->codec_id == AV_CODEC_ID_AAC) {
369 avio_w8(pb, get_audio_flags(s, par));
370 avio_w8(pb, 0); // AAC sequence header
372 if (!par->extradata_size && (flv->flags & FLV_AAC_SEQ_HEADER_DETECT)) {
374 int samplerate_index;
375 int channels = flv->audio_par->channels
376 - (flv->audio_par->channels == 8 ? 1 : 0);
379 for (samplerate_index = 0; samplerate_index < 16;
381 if (flv->audio_par->sample_rate
382 == mpeg4audio_sample_rates[samplerate_index])
385 init_put_bits(&pbc, data, sizeof(data));
386 put_bits(&pbc, 5, flv->audio_par->profile + 1); //profile
387 put_bits(&pbc, 4, samplerate_index); //sample rate index
388 put_bits(&pbc, 4, channels);
389 put_bits(&pbc, 1, 0); //frame length - 1024 samples
390 put_bits(&pbc, 1, 0); //does not depend on core coder
391 put_bits(&pbc, 1, 0); //is not extension
392 flush_put_bits(&pbc);
394 avio_w8(pb, data[0]);
395 avio_w8(pb, data[1]);
397 av_log(s, AV_LOG_WARNING, "AAC sequence header: %02x %02x.\n",
400 avio_write(pb, par->extradata, par->extradata_size);
402 avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags
403 avio_w8(pb, 0); // AVC sequence header
404 avio_wb24(pb, 0); // composition time
405 ff_isom_write_avcc(pb, par->extradata, par->extradata_size);
407 data_size = avio_tell(pb) - pos;
408 avio_seek(pb, -data_size - 10, SEEK_CUR);
409 avio_wb24(pb, data_size);
410 avio_skip(pb, data_size + 10 - 3);
411 avio_wb32(pb, data_size + 11); // previous tag size
415 static int flv_write_header(AVFormatContext *s)
418 AVIOContext *pb = s->pb;
419 FLVContext *flv = s->priv_data;
421 for (i = 0; i < s->nb_streams; i++) {
422 AVCodecParameters *par = s->streams[i]->codecpar;
423 FLVStreamContext *sc;
424 switch (par->codec_type) {
425 case AVMEDIA_TYPE_VIDEO:
426 if (s->streams[i]->avg_frame_rate.den &&
427 s->streams[i]->avg_frame_rate.num) {
428 flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
430 if (flv->video_par) {
431 av_log(s, AV_LOG_ERROR,
432 "at most one video stream is supported in flv\n");
433 return AVERROR(EINVAL);
435 flv->video_par = par;
436 if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id))
437 return unsupported_codec(s, "Video", par->codec_id);
439 if (par->codec_id == AV_CODEC_ID_MPEG4 ||
440 par->codec_id == AV_CODEC_ID_H263) {
441 int error = s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL;
442 av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING,
443 "Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(par->codec_id));
446 av_log(s, AV_LOG_ERROR,
447 "use vstrict=-1 / -strict -1 to use it anyway.\n");
448 return AVERROR(EINVAL);
450 } else if (par->codec_id == AV_CODEC_ID_VP6) {
451 av_log(s, AV_LOG_WARNING,
452 "Muxing VP6 in flv will produce flipped video on playback.\n");
455 case AVMEDIA_TYPE_AUDIO:
456 if (flv->audio_par) {
457 av_log(s, AV_LOG_ERROR,
458 "at most one audio stream is supported in flv\n");
459 return AVERROR(EINVAL);
461 flv->audio_par = par;
462 if (get_audio_flags(s, par) < 0)
463 return unsupported_codec(s, "Audio", par->codec_id);
464 if (par->codec_id == AV_CODEC_ID_PCM_S16BE)
465 av_log(s, AV_LOG_WARNING,
466 "16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
468 case AVMEDIA_TYPE_DATA:
469 if (par->codec_id != AV_CODEC_ID_TEXT && par->codec_id != AV_CODEC_ID_NONE)
470 return unsupported_codec(s, "Data", par->codec_id);
473 case AVMEDIA_TYPE_SUBTITLE:
474 if (par->codec_id != AV_CODEC_ID_TEXT) {
475 av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n",
476 avcodec_get_name(par->codec_id), i);
477 return AVERROR_INVALIDDATA;
482 av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
483 av_get_media_type_string(par->codec_type), i);
484 return AVERROR(EINVAL);
486 avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
488 sc = av_mallocz(sizeof(FLVStreamContext));
490 return AVERROR(ENOMEM);
491 s->streams[i]->priv_data = sc;
495 flv->delay = AV_NOPTS_VALUE;
497 avio_write(pb, "FLV", 3);
499 avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!flv->audio_par +
500 FLV_HEADER_FLAG_HASVIDEO * !!flv->video_par);
504 for (i = 0; i < s->nb_streams; i++)
505 if (s->streams[i]->codecpar->codec_tag == 5) {
506 avio_w8(pb, 8); // message type
507 avio_wb24(pb, 0); // include flags
508 avio_wb24(pb, 0); // time stamp
509 avio_wb32(pb, 0); // reserved
510 avio_wb32(pb, 11); // size
514 write_metadata(s, 0);
516 for (i = 0; i < s->nb_streams; i++) {
517 flv_write_codec_header(s, s->streams[i]->codecpar);
523 static int flv_write_trailer(AVFormatContext *s)
527 AVIOContext *pb = s->pb;
528 FLVContext *flv = s->priv_data;
531 if (flv->flags & FLV_NO_SEQUENCE_END) {
532 av_log(s, AV_LOG_DEBUG, "FLV no sequence end mode open\n");
535 for (i = 0; i < s->nb_streams; i++) {
536 AVCodecParameters *par = s->streams[i]->codecpar;
537 FLVStreamContext *sc = s->streams[i]->priv_data;
538 if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
539 (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4))
540 put_avc_eos_tag(pb, sc->last_ts);
544 file_size = avio_tell(pb);
546 /* update information */
547 if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0)
548 av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n");
550 put_amf_double(pb, flv->duration / (double)1000);
551 if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0)
552 av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n");
554 put_amf_double(pb, file_size);
556 avio_seek(pb, file_size, SEEK_SET);
560 static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
562 AVIOContext *pb = s->pb;
563 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
564 FLVContext *flv = s->priv_data;
565 FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data;
567 int size = pkt->size;
568 uint8_t *data = NULL;
569 int flags = -1, flags_size, ret;
571 if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
572 par->codec_id == AV_CODEC_ID_VP6 || par->codec_id == AV_CODEC_ID_AAC)
574 else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4)
579 if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
580 || par->codec_id == AV_CODEC_ID_MPEG4) {
582 uint8_t *side = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
583 if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) {
584 av_free(par->extradata);
585 par->extradata = av_mallocz(side_size + AV_INPUT_BUFFER_PADDING_SIZE);
586 memcpy(par->extradata, side, side_size);
587 par->extradata_size = side_size;
588 flv_write_codec_header(s, par);
592 if (flv->delay == AV_NOPTS_VALUE)
593 flv->delay = -pkt->dts;
595 if (pkt->dts < -flv->delay) {
596 av_log(s, AV_LOG_WARNING,
597 "Packets are not in the proper order with respect to DTS\n");
598 return AVERROR(EINVAL);
603 if (s->event_flags & AVSTREAM_EVENT_FLAG_METADATA_UPDATED) {
604 write_metadata(s, ts);
605 s->event_flags &= ~AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
608 avio_write_marker(pb, av_rescale(ts, AV_TIME_BASE, 1000),
609 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);
611 switch (par->codec_type) {
612 case AVMEDIA_TYPE_VIDEO:
613 avio_w8(pb, FLV_TAG_TYPE_VIDEO);
615 flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id);
617 flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
619 case AVMEDIA_TYPE_AUDIO:
620 flags = get_audio_flags(s, par);
624 avio_w8(pb, FLV_TAG_TYPE_AUDIO);
626 case AVMEDIA_TYPE_SUBTITLE:
627 case AVMEDIA_TYPE_DATA:
628 avio_w8(pb, FLV_TAG_TYPE_META);
631 return AVERROR(EINVAL);
634 if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
635 /* check if extradata looks like mp4 formatted */
636 if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
637 if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0)
639 } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
640 (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
641 if (!s->streams[pkt->stream_index]->nb_frames) {
642 av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
643 "use the audio bitstream filter 'aac_adtstoasc' to fix it "
644 "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
645 return AVERROR_INVALIDDATA;
647 av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
650 /* check Speex packet duration */
651 if (par->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160)
652 av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
653 "8 frames per packet. Adobe Flash "
654 "Player cannot handle this!\n");
656 if (sc->last_ts < ts)
659 if (size + flags_size >= 1<<24) {
660 av_log(s, AV_LOG_ERROR, "Too large packet with size %u >= %u\n",
661 size + flags_size, 1<<24);
662 return AVERROR(EINVAL);
665 avio_wb24(pb, size + flags_size);
666 avio_wb24(pb, ts & 0xFFFFFF);
667 avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_
668 avio_wb24(pb, flv->reserved);
670 if (par->codec_type == AVMEDIA_TYPE_DATA ||
671 par->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
673 int64_t metadata_size_pos = avio_tell(pb);
674 if (par->codec_id == AV_CODEC_ID_TEXT) {
675 // legacy FFmpeg magic?
676 avio_w8(pb, AMF_DATA_TYPE_STRING);
677 put_amf_string(pb, "onTextData");
678 avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
680 put_amf_string(pb, "type");
681 avio_w8(pb, AMF_DATA_TYPE_STRING);
682 put_amf_string(pb, "Text");
683 put_amf_string(pb, "text");
684 avio_w8(pb, AMF_DATA_TYPE_STRING);
685 put_amf_string(pb, pkt->data);
686 put_amf_string(pb, "");
687 avio_w8(pb, AMF_END_OF_OBJECT);
689 // just pass the metadata through
690 avio_write(pb, data ? data : pkt->data, size);
692 /* write total size of tag */
693 data_size = avio_tell(pb) - metadata_size_pos;
694 avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
695 avio_wb24(pb, data_size);
696 avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
697 avio_wb32(pb, data_size + 11);
699 av_assert1(flags>=0);
701 if (par->codec_id == AV_CODEC_ID_VP6)
703 if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A) {
704 if (par->extradata_size)
705 avio_w8(pb, par->extradata[0]);
707 avio_w8(pb, ((FFALIGN(par->width, 16) - par->width) << 4) |
708 (FFALIGN(par->height, 16) - par->height));
709 } else if (par->codec_id == AV_CODEC_ID_AAC)
710 avio_w8(pb, 1); // AAC raw
711 else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
712 avio_w8(pb, 1); // AVC NALU
713 avio_wb24(pb, pkt->pts - pkt->dts);
716 avio_write(pb, data ? data : pkt->data, size);
718 avio_wb32(pb, size + flags_size + 11); // previous tag size
719 flv->duration = FFMAX(flv->duration,
720 pkt->pts + flv->delay + pkt->duration);
728 static const AVOption options[] = {
729 { "flvflags", "FLV muxer flags", offsetof(FLVContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
730 { "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" },
731 { "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" },
735 static const AVClass flv_muxer_class = {
736 .class_name = "flv muxer",
737 .item_name = av_default_item_name,
739 .version = LIBAVUTIL_VERSION_INT,
742 AVOutputFormat ff_flv_muxer = {
744 .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
745 .mime_type = "video/x-flv",
747 .priv_data_size = sizeof(FLVContext),
748 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF,
749 .video_codec = AV_CODEC_ID_FLV1,
750 .write_header = flv_write_header,
751 .write_packet = flv_write_packet,
752 .write_trailer = flv_write_trailer,
753 .codec_tag = (const AVCodecTag* const []) {
754 flv_video_codec_ids, flv_audio_codec_ids, 0
756 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
758 .priv_class = &flv_muxer_class,