mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
571 lines
19 KiB
571 lines
19 KiB
/* |
|
* FLV muxer |
|
* Copyright (c) 2003 The Libav Project |
|
* |
|
* This file is part of Libav. |
|
* |
|
* Libav is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 of the License, or (at your option) any later version. |
|
* |
|
* Libav is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser General Public |
|
* License along with Libav; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include "libavutil/dict.h" |
|
#include "libavutil/intfloat.h" |
|
#include "avc.h" |
|
#include "avformat.h" |
|
#include "flv.h" |
|
#include "internal.h" |
|
#include "metadata.h" |
|
|
|
#undef NDEBUG |
|
#include <assert.h> |
|
|
|
static const AVCodecTag flv_video_codec_ids[] = { |
|
{ AV_CODEC_ID_FLV1, FLV_CODECID_H263 }, |
|
{ AV_CODEC_ID_FLASHSV, FLV_CODECID_SCREEN }, |
|
{ AV_CODEC_ID_FLASHSV2, FLV_CODECID_SCREEN2 }, |
|
{ AV_CODEC_ID_VP6F, FLV_CODECID_VP6 }, |
|
{ AV_CODEC_ID_VP6A, FLV_CODECID_VP6A }, |
|
{ AV_CODEC_ID_H264, FLV_CODECID_H264 }, |
|
{ AV_CODEC_ID_NONE, 0 } |
|
}; |
|
|
|
static const AVCodecTag flv_audio_codec_ids[] = { |
|
{ AV_CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET }, |
|
{ AV_CODEC_ID_PCM_U8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET }, |
|
{ AV_CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET }, |
|
{ AV_CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET }, |
|
{ AV_CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET }, |
|
{ AV_CODEC_ID_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET }, |
|
{ AV_CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET }, |
|
{ AV_CODEC_ID_PCM_MULAW, FLV_CODECID_PCM_MULAW >> FLV_AUDIO_CODECID_OFFSET }, |
|
{ AV_CODEC_ID_PCM_ALAW, FLV_CODECID_PCM_ALAW >> FLV_AUDIO_CODECID_OFFSET }, |
|
{ AV_CODEC_ID_SPEEX, FLV_CODECID_SPEEX >> FLV_AUDIO_CODECID_OFFSET }, |
|
{ AV_CODEC_ID_NONE, 0 } |
|
}; |
|
|
|
typedef struct FLVContext { |
|
int reserved; |
|
int64_t duration_offset; |
|
int64_t filesize_offset; |
|
int64_t duration; |
|
int64_t delay; ///< first dts delay (needed for AVC & Speex) |
|
} FLVContext; |
|
|
|
typedef struct FLVStreamContext { |
|
int64_t last_ts; ///< last timestamp for each stream |
|
} FLVStreamContext; |
|
|
|
static int get_audio_flags(AVFormatContext *s, AVCodecContext *enc) |
|
{ |
|
int flags = (enc->bits_per_coded_sample == 16) ? FLV_SAMPLESSIZE_16BIT |
|
: FLV_SAMPLESSIZE_8BIT; |
|
|
|
if (enc->codec_id == AV_CODEC_ID_AAC) // specs force these parameters |
|
return FLV_CODECID_AAC | FLV_SAMPLERATE_44100HZ | |
|
FLV_SAMPLESSIZE_16BIT | FLV_STEREO; |
|
else if (enc->codec_id == AV_CODEC_ID_SPEEX) { |
|
if (enc->sample_rate != 16000) { |
|
av_log(s, AV_LOG_ERROR, |
|
"flv only supports wideband (16kHz) Speex audio\n"); |
|
return -1; |
|
} |
|
if (enc->channels != 1) { |
|
av_log(s, AV_LOG_ERROR, "flv only supports mono Speex audio\n"); |
|
return -1; |
|
} |
|
return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT; |
|
} else { |
|
switch (enc->sample_rate) { |
|
case 44100: |
|
flags |= FLV_SAMPLERATE_44100HZ; |
|
break; |
|
case 22050: |
|
flags |= FLV_SAMPLERATE_22050HZ; |
|
break; |
|
case 11025: |
|
flags |= FLV_SAMPLERATE_11025HZ; |
|
break; |
|
case 16000: // nellymoser only |
|
case 8000: // nellymoser only |
|
case 5512: // not MP3 |
|
if (enc->codec_id != AV_CODEC_ID_MP3) { |
|
flags |= FLV_SAMPLERATE_SPECIAL; |
|
break; |
|
} |
|
default: |
|
av_log(s, AV_LOG_ERROR, |
|
"flv does not support that sample rate, " |
|
"choose from (44100, 22050, 11025).\n"); |
|
return -1; |
|
} |
|
} |
|
|
|
if (enc->channels > 1) |
|
flags |= FLV_STEREO; |
|
|
|
switch (enc->codec_id) { |
|
case AV_CODEC_ID_MP3: |
|
flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT; |
|
break; |
|
case AV_CODEC_ID_PCM_U8: |
|
flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_8BIT; |
|
break; |
|
case AV_CODEC_ID_PCM_S16BE: |
|
flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_16BIT; |
|
break; |
|
case AV_CODEC_ID_PCM_S16LE: |
|
flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT; |
|
break; |
|
case AV_CODEC_ID_ADPCM_SWF: |
|
flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT; |
|
break; |
|
case AV_CODEC_ID_NELLYMOSER: |
|
if (enc->sample_rate == 8000) |
|
flags |= FLV_CODECID_NELLYMOSER_8KHZ_MONO | FLV_SAMPLESSIZE_16BIT; |
|
else if (enc->sample_rate == 16000) |
|
flags |= FLV_CODECID_NELLYMOSER_16KHZ_MONO | FLV_SAMPLESSIZE_16BIT; |
|
else |
|
flags |= FLV_CODECID_NELLYMOSER | FLV_SAMPLESSIZE_16BIT; |
|
break; |
|
case AV_CODEC_ID_PCM_MULAW: |
|
flags = FLV_CODECID_PCM_MULAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT; |
|
break; |
|
case AV_CODEC_ID_PCM_ALAW: |
|
flags = FLV_CODECID_PCM_ALAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT; |
|
break; |
|
case 0: |
|
flags |= enc->codec_tag << 4; |
|
break; |
|
default: |
|
av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n"); |
|
return -1; |
|
} |
|
|
|
return flags; |
|
} |
|
|
|
static void put_amf_string(AVIOContext *pb, const char *str) |
|
{ |
|
size_t len = strlen(str); |
|
avio_wb16(pb, len); |
|
avio_write(pb, str, len); |
|
} |
|
|
|
static void put_avc_eos_tag(AVIOContext *pb, unsigned ts) |
|
{ |
|
avio_w8(pb, FLV_TAG_TYPE_VIDEO); |
|
avio_wb24(pb, 5); /* Tag Data Size */ |
|
avio_wb24(pb, ts); /* lower 24 bits of timestamp in ms */ |
|
avio_w8(pb, (ts >> 24) & 0x7F); /* MSB of ts in ms */ |
|
avio_wb24(pb, 0); /* StreamId = 0 */ |
|
avio_w8(pb, 23); /* ub[4] FrameType = 1, ub[4] CodecId = 7 */ |
|
avio_w8(pb, 2); /* AVC end of sequence */ |
|
avio_wb24(pb, 0); /* Always 0 for AVC EOS. */ |
|
avio_wb32(pb, 16); /* Size of FLV tag */ |
|
} |
|
|
|
static void put_amf_double(AVIOContext *pb, double d) |
|
{ |
|
avio_w8(pb, AMF_DATA_TYPE_NUMBER); |
|
avio_wb64(pb, av_double2int(d)); |
|
} |
|
|
|
static void put_amf_bool(AVIOContext *pb, int b) |
|
{ |
|
avio_w8(pb, AMF_DATA_TYPE_BOOL); |
|
avio_w8(pb, !!b); |
|
} |
|
|
|
static int flv_write_header(AVFormatContext *s) |
|
{ |
|
AVIOContext *pb = s->pb; |
|
FLVContext *flv = s->priv_data; |
|
AVCodecContext *audio_enc = NULL, *video_enc = NULL, *data_enc = NULL; |
|
int i, metadata_count = 0; |
|
double framerate = 0.0; |
|
int64_t metadata_size_pos, data_size, metadata_count_pos; |
|
AVDictionaryEntry *tag = NULL; |
|
|
|
for (i = 0; i < s->nb_streams; i++) { |
|
AVCodecContext *enc = s->streams[i]->codec; |
|
FLVStreamContext *sc; |
|
switch (enc->codec_type) { |
|
case AVMEDIA_TYPE_VIDEO: |
|
if (s->streams[i]->avg_frame_rate.den && |
|
s->streams[i]->avg_frame_rate.num) { |
|
framerate = av_q2d(s->streams[i]->avg_frame_rate); |
|
} else { |
|
framerate = 1 / av_q2d(s->streams[i]->codec->time_base); |
|
} |
|
if (video_enc) { |
|
av_log(s, AV_LOG_ERROR, |
|
"at most one video stream is supported in flv\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
video_enc = enc; |
|
if (enc->codec_tag == 0) { |
|
av_log(s, AV_LOG_ERROR, "video codec not compatible with flv\n"); |
|
return -1; |
|
} |
|
break; |
|
case AVMEDIA_TYPE_AUDIO: |
|
if (audio_enc) { |
|
av_log(s, AV_LOG_ERROR, |
|
"at most one audio stream is supported in flv\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
audio_enc = enc; |
|
if (get_audio_flags(s, enc) < 0) |
|
return AVERROR_INVALIDDATA; |
|
break; |
|
case AVMEDIA_TYPE_DATA: |
|
if (enc->codec_id != AV_CODEC_ID_TEXT) { |
|
av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
data_enc = enc; |
|
break; |
|
default: |
|
av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n"); |
|
return -1; |
|
} |
|
avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */ |
|
|
|
sc = av_mallocz(sizeof(FLVStreamContext)); |
|
if (!sc) |
|
return AVERROR(ENOMEM); |
|
s->streams[i]->priv_data = sc; |
|
sc->last_ts = -1; |
|
} |
|
|
|
flv->delay = AV_NOPTS_VALUE; |
|
|
|
avio_write(pb, "FLV", 3); |
|
avio_w8(pb, 1); |
|
avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!audio_enc + |
|
FLV_HEADER_FLAG_HASVIDEO * !!video_enc); |
|
avio_wb32(pb, 9); |
|
avio_wb32(pb, 0); |
|
|
|
for (i = 0; i < s->nb_streams; i++) |
|
if (s->streams[i]->codec->codec_tag == 5) { |
|
avio_w8(pb, 8); // message type |
|
avio_wb24(pb, 0); // include flags |
|
avio_wb24(pb, 0); // time stamp |
|
avio_wb32(pb, 0); // reserved |
|
avio_wb32(pb, 11); // size |
|
flv->reserved = 5; |
|
} |
|
|
|
/* write meta_tag */ |
|
avio_w8(pb, 18); // tag type META |
|
metadata_size_pos = avio_tell(pb); |
|
avio_wb24(pb, 0); // size of data part (sum of all parts below) |
|
avio_wb24(pb, 0); // timestamp |
|
avio_wb32(pb, 0); // reserved |
|
|
|
/* now data of data_size size */ |
|
|
|
/* first event name as a string */ |
|
avio_w8(pb, AMF_DATA_TYPE_STRING); |
|
put_amf_string(pb, "onMetaData"); // 12 bytes |
|
|
|
/* mixed array (hash) with size and string/type/data tuples */ |
|
avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY); |
|
metadata_count_pos = avio_tell(pb); |
|
metadata_count = 5 * !!video_enc + |
|
5 * !!audio_enc + |
|
1 * !!data_enc + |
|
2; // +2 for duration and file size |
|
|
|
avio_wb32(pb, metadata_count); |
|
|
|
put_amf_string(pb, "duration"); |
|
flv->duration_offset= avio_tell(pb); |
|
|
|
// fill in the guessed duration, it'll be corrected later if incorrect |
|
put_amf_double(pb, s->duration / AV_TIME_BASE); |
|
|
|
if (video_enc) { |
|
put_amf_string(pb, "width"); |
|
put_amf_double(pb, video_enc->width); |
|
|
|
put_amf_string(pb, "height"); |
|
put_amf_double(pb, video_enc->height); |
|
|
|
put_amf_string(pb, "videodatarate"); |
|
put_amf_double(pb, video_enc->bit_rate / 1024.0); |
|
|
|
put_amf_string(pb, "framerate"); |
|
put_amf_double(pb, framerate); |
|
|
|
put_amf_string(pb, "videocodecid"); |
|
put_amf_double(pb, video_enc->codec_tag); |
|
} |
|
|
|
if (audio_enc) { |
|
put_amf_string(pb, "audiodatarate"); |
|
put_amf_double(pb, audio_enc->bit_rate / 1024.0); |
|
|
|
put_amf_string(pb, "audiosamplerate"); |
|
put_amf_double(pb, audio_enc->sample_rate); |
|
|
|
put_amf_string(pb, "audiosamplesize"); |
|
put_amf_double(pb, audio_enc->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16); |
|
|
|
put_amf_string(pb, "stereo"); |
|
put_amf_bool(pb, audio_enc->channels == 2); |
|
|
|
put_amf_string(pb, "audiocodecid"); |
|
put_amf_double(pb, audio_enc->codec_tag); |
|
} |
|
|
|
if (data_enc) { |
|
put_amf_string(pb, "datastream"); |
|
put_amf_double(pb, 0.0); |
|
} |
|
|
|
while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) { |
|
put_amf_string(pb, tag->key); |
|
avio_w8(pb, AMF_DATA_TYPE_STRING); |
|
put_amf_string(pb, tag->value); |
|
metadata_count++; |
|
} |
|
|
|
put_amf_string(pb, "filesize"); |
|
flv->filesize_offset = avio_tell(pb); |
|
put_amf_double(pb, 0); // delayed write |
|
|
|
put_amf_string(pb, ""); |
|
avio_w8(pb, AMF_END_OF_OBJECT); |
|
|
|
/* write total size of tag */ |
|
data_size = avio_tell(pb) - metadata_size_pos - 10; |
|
|
|
avio_seek(pb, metadata_count_pos, SEEK_SET); |
|
avio_wb32(pb, metadata_count); |
|
|
|
avio_seek(pb, metadata_size_pos, SEEK_SET); |
|
avio_wb24(pb, data_size); |
|
avio_skip(pb, data_size + 10 - 3); |
|
avio_wb32(pb, data_size + 11); |
|
|
|
for (i = 0; i < s->nb_streams; i++) { |
|
AVCodecContext *enc = s->streams[i]->codec; |
|
if (enc->codec_id == AV_CODEC_ID_AAC || enc->codec_id == AV_CODEC_ID_H264) { |
|
int64_t pos; |
|
avio_w8(pb, enc->codec_type == AVMEDIA_TYPE_VIDEO ? |
|
FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO); |
|
avio_wb24(pb, 0); // size patched later |
|
avio_wb24(pb, 0); // ts |
|
avio_w8(pb, 0); // ts ext |
|
avio_wb24(pb, 0); // streamid |
|
pos = avio_tell(pb); |
|
if (enc->codec_id == AV_CODEC_ID_AAC) { |
|
avio_w8(pb, get_audio_flags(s, enc)); |
|
avio_w8(pb, 0); // AAC sequence header |
|
avio_write(pb, enc->extradata, enc->extradata_size); |
|
} else { |
|
avio_w8(pb, enc->codec_tag | FLV_FRAME_KEY); // flags |
|
avio_w8(pb, 0); // AVC sequence header |
|
avio_wb24(pb, 0); // composition time |
|
ff_isom_write_avcc(pb, enc->extradata, enc->extradata_size); |
|
} |
|
data_size = avio_tell(pb) - pos; |
|
avio_seek(pb, -data_size - 10, SEEK_CUR); |
|
avio_wb24(pb, data_size); |
|
avio_skip(pb, data_size + 10 - 3); |
|
avio_wb32(pb, data_size + 11); // previous tag size |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int flv_write_trailer(AVFormatContext *s) |
|
{ |
|
int64_t file_size; |
|
|
|
AVIOContext *pb = s->pb; |
|
FLVContext *flv = s->priv_data; |
|
int i; |
|
|
|
/* Add EOS tag */ |
|
for (i = 0; i < s->nb_streams; i++) { |
|
AVCodecContext *enc = s->streams[i]->codec; |
|
FLVStreamContext *sc = s->streams[i]->priv_data; |
|
if (enc->codec_type == AVMEDIA_TYPE_VIDEO && |
|
enc->codec_id == AV_CODEC_ID_H264) |
|
put_avc_eos_tag(pb, sc->last_ts); |
|
} |
|
|
|
file_size = avio_tell(pb); |
|
|
|
/* update information */ |
|
if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0) |
|
av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n"); |
|
else |
|
put_amf_double(pb, flv->duration / (double)1000); |
|
if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0) |
|
av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n"); |
|
else |
|
put_amf_double(pb, file_size); |
|
|
|
avio_seek(pb, file_size, SEEK_SET); |
|
return 0; |
|
} |
|
|
|
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
AVIOContext *pb = s->pb; |
|
AVCodecContext *enc = s->streams[pkt->stream_index]->codec; |
|
FLVContext *flv = s->priv_data; |
|
FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data; |
|
unsigned ts; |
|
int size = pkt->size; |
|
uint8_t *data = NULL; |
|
int flags = 0, flags_size; |
|
|
|
if (enc->codec_id == AV_CODEC_ID_VP6F || enc->codec_id == AV_CODEC_ID_VP6A || |
|
enc->codec_id == AV_CODEC_ID_AAC) |
|
flags_size = 2; |
|
else if (enc->codec_id == AV_CODEC_ID_H264) |
|
flags_size = 5; |
|
else |
|
flags_size = 1; |
|
|
|
switch (enc->codec_type) { |
|
case AVMEDIA_TYPE_VIDEO: |
|
avio_w8(pb, FLV_TAG_TYPE_VIDEO); |
|
|
|
flags = enc->codec_tag; |
|
if (flags == 0) { |
|
av_log(s, AV_LOG_ERROR, |
|
"video codec %X not compatible with flv\n", |
|
enc->codec_id); |
|
return -1; |
|
} |
|
|
|
flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER; |
|
break; |
|
case AVMEDIA_TYPE_AUDIO: |
|
flags = get_audio_flags(s, enc); |
|
|
|
assert(size); |
|
|
|
avio_w8(pb, FLV_TAG_TYPE_AUDIO); |
|
break; |
|
case AVMEDIA_TYPE_DATA: |
|
avio_w8(pb, FLV_TAG_TYPE_META); |
|
break; |
|
default: |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
if (enc->codec_id == AV_CODEC_ID_H264) |
|
/* check if extradata looks like MP4 */ |
|
if (enc->extradata_size > 0 && *(uint8_t*)enc->extradata != 1) |
|
if (ff_avc_parse_nal_units_buf(pkt->data, &data, &size) < 0) |
|
return -1; |
|
|
|
if (flv->delay == AV_NOPTS_VALUE) |
|
flv->delay = -pkt->dts; |
|
|
|
if (pkt->dts < -flv->delay) { |
|
av_log(s, AV_LOG_WARNING, |
|
"Packets are not in the proper order with respect to DTS\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
ts = pkt->dts + flv->delay; // add delay to force positive dts |
|
|
|
/* check Speex packet duration */ |
|
if (enc->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160) |
|
av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than " |
|
"8 frames per packet. Adobe Flash " |
|
"Player cannot handle this!\n"); |
|
|
|
if (sc->last_ts < ts) |
|
sc->last_ts = ts; |
|
|
|
avio_wb24(pb, size + flags_size); |
|
avio_wb24(pb, ts); |
|
avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_ |
|
avio_wb24(pb, flv->reserved); |
|
|
|
if (enc->codec_type == AVMEDIA_TYPE_DATA) { |
|
int data_size; |
|
int64_t metadata_size_pos = avio_tell(pb); |
|
avio_w8(pb, AMF_DATA_TYPE_STRING); |
|
put_amf_string(pb, "onTextData"); |
|
avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY); |
|
avio_wb32(pb, 2); |
|
put_amf_string(pb, "type"); |
|
avio_w8(pb, AMF_DATA_TYPE_STRING); |
|
put_amf_string(pb, "Text"); |
|
put_amf_string(pb, "text"); |
|
avio_w8(pb, AMF_DATA_TYPE_STRING); |
|
put_amf_string(pb, pkt->data); |
|
put_amf_string(pb, ""); |
|
avio_w8(pb, AMF_END_OF_OBJECT); |
|
/* write total size of tag */ |
|
data_size = avio_tell(pb) - metadata_size_pos; |
|
avio_seek(pb, metadata_size_pos - 10, SEEK_SET); |
|
avio_wb24(pb, data_size); |
|
avio_seek(pb, data_size + 10 - 3, SEEK_CUR); |
|
avio_wb32(pb, data_size + 11); |
|
} else { |
|
avio_w8(pb,flags); |
|
if (enc->codec_id == AV_CODEC_ID_VP6F || enc->codec_id == AV_CODEC_ID_VP6A) { |
|
if (enc->extradata_size) |
|
avio_w8(pb, enc->extradata[0]); |
|
else |
|
avio_w8(pb, ((FFALIGN(enc->width, 16) - enc->width) << 4) | |
|
(FFALIGN(enc->height, 16) - enc->height)); |
|
} else if (enc->codec_id == AV_CODEC_ID_AAC) |
|
avio_w8(pb, 1); // AAC raw |
|
else if (enc->codec_id == AV_CODEC_ID_H264) { |
|
avio_w8(pb, 1); // AVC NALU |
|
avio_wb24(pb, pkt->pts - pkt->dts); |
|
} |
|
|
|
avio_write(pb, data ? data : pkt->data, size); |
|
|
|
avio_wb32(pb, size + flags_size + 11); // previous tag size |
|
flv->duration = FFMAX(flv->duration, |
|
pkt->pts + flv->delay + pkt->duration); |
|
} |
|
|
|
av_free(data); |
|
|
|
return pb->error; |
|
} |
|
|
|
AVOutputFormat ff_flv_muxer = { |
|
.name = "flv", |
|
.long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"), |
|
.mime_type = "video/x-flv", |
|
.extensions = "flv", |
|
.priv_data_size = sizeof(FLVContext), |
|
.audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF, |
|
.video_codec = AV_CODEC_ID_FLV1, |
|
.write_header = flv_write_header, |
|
.write_packet = flv_write_packet, |
|
.write_trailer = flv_write_trailer, |
|
.codec_tag = (const AVCodecTag* const []) { |
|
flv_video_codec_ids, flv_audio_codec_ids, 0 |
|
}, |
|
.flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS | |
|
AVFMT_TS_NONSTRICT, |
|
};
|
|
|