static int flv_write_header(AVFormatContext *s)
{
int i;
AVIOContext *pb = s->pb;
FLVContext *flv = s->priv_data;
for (i = 0; i < s->nb_streams; i++) {
AVCodecParameters *par = s->streams[i]->codecpar;
FLVStreamContext *sc;
switch (par->codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (s->streams[i]->avg_frame_rate.den &&
s->streams[i]->avg_frame_rate.num) {
flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
}
if (flv->video_par) {
av_log(s, AV_LOG_ERROR,
"at most one video stream is supported in flv\n");
return AVERROR(EINVAL);
}
flv->video_par = par;
if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id))
return unsupported_codec(s, "Video", par->codec_id);
if (par->codec_id == AV_CODEC_ID_MPEG4 ||
par->codec_id == AV_CODEC_ID_H263) {
int error = s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL;
av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING,
"Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(par->codec_id));
if (error) {
av_log(s, AV_LOG_ERROR,
"use vstrict=-1 / -strict -1 to use it anyway.\n");
return AVERROR(EINVAL);
}
} else if (par->codec_id == AV_CODEC_ID_VP6) {
av_log(s, AV_LOG_WARNING,
"Muxing VP6 in flv will produce flipped video on playback.\n");
}
break;
case AVMEDIA_TYPE_AUDIO:
if (flv->audio_par) {
av_log(s, AV_LOG_ERROR,
"at most one audio stream is supported in flv\n");
return AVERROR(EINVAL);
}
flv->audio_par = par;
if (get_audio_flags(s, par) < 0)
return unsupported_codec(s, "Audio", par->codec_id);
if (par->codec_id == AV_CODEC_ID_PCM_S16BE)
av_log(s, AV_LOG_WARNING,
"16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
break;
case AVMEDIA_TYPE_DATA:
if (par->codec_id != AV_CODEC_ID_TEXT && par->codec_id != AV_CODEC_ID_NONE)
return unsupported_codec(s, "Data", par->codec_id);
flv->data_par = par;
break;
case AVMEDIA_TYPE_SUBTITLE:
if (par->codec_id != AV_CODEC_ID_TEXT) {
av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n",
avcodec_get_name(par->codec_id), i);
return AVERROR_INVALIDDATA;
}
flv->data_par = par;
break;
default:
av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
av_get_media_type_string(par->codec_type), i);
return AVERROR(EINVAL);
}
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 * !!flv->audio_par +
FLV_HEADER_FLAG_HASVIDEO * !!flv->video_par);
avio_wb32(pb, 9);
avio_wb32(pb, 0);
for (i = 0; i < s->nb_streams; i++)
if (s->streams[i]->codecpar->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;
}
if (flv->flags & FLV_NO_METADATA) {
pb->seekable = 0;
} else {
write_metadata(s, 0);
}
for (i = 0; i < s->nb_streams; i++) {
flv_write_codec_header(s, s->streams[i]->codecpar);
}
flv->datastart_offset = avio_tell(pb);
return 0;
}
static int flv_write_header(AVFormatContext *s)
{
int i;
AVIOContext *pb = s->pb;
FLVContext *flv = s->priv_data;
int64_t data_size;
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) {
flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
}
if (flv->video_enc) {
av_log(s, AV_LOG_ERROR,
"at most one video stream is supported in flv\n");
return AVERROR(EINVAL);
}
flv->video_enc = enc;
if (!ff_codec_get_tag(flv_video_codec_ids, enc->codec_id))
return unsupported_codec(s, "Video", enc->codec_id);
if (enc->codec_id == AV_CODEC_ID_MPEG4 ||
enc->codec_id == AV_CODEC_ID_H263) {
int error = s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL;
av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING,
"Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(enc->codec_id));
if (error) {
av_log(s, AV_LOG_ERROR,
"use vstrict=-1 / -strict -1 to use it anyway.\n");
return AVERROR(EINVAL);
}
} else if (enc->codec_id == AV_CODEC_ID_VP6) {
av_log(s, AV_LOG_WARNING,
"Muxing VP6 in flv will produce flipped video on playback.\n");
}
break;
case AVMEDIA_TYPE_AUDIO:
if (flv->audio_enc) {
av_log(s, AV_LOG_ERROR,
"at most one audio stream is supported in flv\n");
return AVERROR(EINVAL);
}
flv->audio_enc = enc;
if (get_audio_flags(s, enc) < 0)
return unsupported_codec(s, "Audio", enc->codec_id);
if (enc->codec_id == AV_CODEC_ID_PCM_S16BE)
av_log(s, AV_LOG_WARNING,
"16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
break;
case AVMEDIA_TYPE_DATA:
if (enc->codec_id != AV_CODEC_ID_TEXT && enc->codec_id != AV_CODEC_ID_NONE)
return unsupported_codec(s, "Data", enc->codec_id);
flv->data_enc = enc;
break;
case AVMEDIA_TYPE_SUBTITLE:
if (enc->codec_id != AV_CODEC_ID_TEXT) {
av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n",
avcodec_get_name(enc->codec_id), i);
return AVERROR_INVALIDDATA;
}
flv->data_enc = enc;
break;
default:
av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
av_get_media_type_string(enc->codec_type), i);
return AVERROR(EINVAL);
}
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 * !!flv->audio_enc +
FLV_HEADER_FLAG_HASVIDEO * !!flv->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_metadata(s, 0);
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 || enc->codec_id == AV_CODEC_ID_MPEG4) {
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_header(AVFormatContext *s)
{
int i;
AVIOContext *pb = s->pb;
FLVContext *flv = s->priv_data;
int64_t data_size;
for (i = 0; i < s->nb_streams; i++) {
AVCodecParameters *par = s->streams[i]->codecpar;
FLVStreamContext *sc;
switch (par->codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (s->streams[i]->avg_frame_rate.den &&
s->streams[i]->avg_frame_rate.num) {
flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
}
if (flv->video_par) {
av_log(s, AV_LOG_ERROR,
"at most one video stream is supported in flv\n");
return AVERROR(EINVAL);
}
flv->video_par = par;
if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id))
return unsupported_codec(s, "Video", par->codec_id);
break;
case AVMEDIA_TYPE_AUDIO:
if (flv->audio_par) {
av_log(s, AV_LOG_ERROR,
"at most one audio stream is supported in flv\n");
return AVERROR(EINVAL);
}
flv->audio_par = par;
if (get_audio_flags(s, par) < 0)
return unsupported_codec(s, "Audio", par->codec_id);
break;
case AVMEDIA_TYPE_DATA:
if (par->codec_id != AV_CODEC_ID_TEXT)
return unsupported_codec(s, "Data", par->codec_id);
flv->data_par = par;
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 * !!flv->audio_par +
FLV_HEADER_FLAG_HASVIDEO * !!flv->video_par);
avio_wb32(pb, 9);
avio_wb32(pb, 0);
for (i = 0; i < s->nb_streams; i++)
if (s->streams[i]->codecpar->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_metadata(s, 0);
for (i = 0; i < s->nb_streams; i++) {
AVCodecParameters *par = s->streams[i]->codecpar;
if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264) {
int64_t pos;
avio_w8(pb, par->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 (par->codec_id == AV_CODEC_ID_AAC) {
avio_w8(pb, get_audio_flags(s, par));
avio_w8(pb, 0); // AAC sequence header
avio_write(pb, par->extradata, par->extradata_size);
} else {
avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags
avio_w8(pb, 0); // AVC sequence header
avio_wb24(pb, 0); // composition time
ff_isom_write_avcc(pb, par->extradata, par->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;
}