It's been added recently. Here's the definition:
https://github.com/ietf-wg-cellar/matroska-specification/blob/master/codec_specs.md#a_atracat1
------- Original Message -------
On Monday, March 6th, 2023 at 7:39 PM, Paul B Mahol <one...@gmail.com> wrote:
> On 3/6/23, asivery asiv...@protonmail.com wrote:
>
> > Signed-off-by: asivery asiv...@protonmail.com
> > ---
> > libavformat/matroska.c | 1 +
> > libavformat/matroskadec.c | 2 ++
> > 2 files changed, 3 insertions(+)
>
>
> where is this defined?
>
> > diff --git a/libavformat/matroska.c b/libavformat/matroska.c
> > index 90d94b65bf..37305a523c 100644
> > --- a/libavformat/matroska.c
> > +++ b/libavformat/matroska.c
> > @@ -55,6 +55,7 @@ const CodecTags ff_mkv_codec_tags[]={
> > {"A_REAL/ATRC" , AV_CODEC_ID_ATRAC3},
> > {"A_REAL/COOK" , AV_CODEC_ID_COOK},
> > {"A_REAL/SIPR" , AV_CODEC_ID_SIPR},
> > + {"A_ATRAC/AT1" , AV_CODEC_ID_ATRAC1},
> > {"A_TRUEHD" , AV_CODEC_ID_TRUEHD},
> > {"A_TTA1" , AV_CODEC_ID_TTA},
> > {"A_VORBIS" , AV_CODEC_ID_VORBIS},
> > diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
> > index d582f566a2..0aa8e6f3b3 100644
> > --- a/libavformat/matroskadec.c
> > +++ b/libavformat/matroskadec.c
> > @@ -2795,6 +2795,8 @@ static int matroska_parse_tracks(AVFormatContext s)
> > track->audio.frame_size);
> > if (!track->audio.buf)
> > return AVERROR(ENOMEM);
> > + } else if (codec_id == AV_CODEC_ID_ATRAC1) {
> > + st->codecpar->block_align = track->audio.channels * 212; / Constant ATRAC
> > frame size */
> > } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
> > ret = matroska_parse_flac(s, track, &extradata_offset);
> > if (ret < 0)
> > --
> > 2.34.1
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