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avformat/matroskaenc: handle AV1 extradata in packet side data

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This is a temporary workaround for transcoding scenarious using libaom-av1
encoder, which currently can't propagate extradata during initialization.

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2018-08-10 23:25:32 -03:00
parent 223d2bde22
commit de1b44c206
1 changed files with 37 additions and 2 deletions
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39
libavformat/matroskaenc.c
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@ -771,8 +771,12 @@ static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
par->extradata_size, 0);
return 0;
case AV_CODEC_ID_AV1:
return ff_isom_write_av1c(dyn_cp, par->extradata,
par->extradata_size);
if (par->extradata_size)
return ff_isom_write_av1c(dyn_cp, par->extradata,
par->extradata_size);
else
put_ebml_void(pb, 4 + 3);
break;
case AV_CODEC_ID_ALAC:
if (par->extradata_size < 36) {
av_log(s, AV_LOG_ERROR,
@ -2325,6 +2329,37 @@ static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
avcodec_parameters_free(&codecpriv_par);
}
break;
// FIXME: Remove the following once libaom starts propagating extradata during init()
// See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
case AV_CODEC_ID_AV1:
if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
!par->extradata_size) {
AVIOContext *dyn_cp;
uint8_t *codecpriv;
int codecpriv_size;
int64_t curpos;
ret = avio_open_dyn_buf(&dyn_cp);
if (ret < 0)
return ret;
ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
if (!codecpriv_size) {
av_free(codecpriv);
return AVERROR_INVALIDDATA;
}
curpos = avio_tell(mkv->tracks_bc);
avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
// Do not write the OBUs as we don't have space saved for them
put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
av_free(codecpriv);
avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
ret = ff_alloc_extradata(par, side_data_size);
if (ret < 0)
return ret;
memcpy(par->extradata, side_data, side_data_size);
} else if (!par->extradata_size)
return AVERROR_INVALIDDATA;
break;
default:
if (side_data_size)
av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);