Hi again,

I've updated the PR here with a description of the most recent
changes and the fixed rebase commit:
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/6

Hopefully that helps make things more clear!

-- Romain

Le mer. 19 févr. 2025 à 12:57, Romain Beauxis
<romain.beau...@gmail.com> a écrit :
>
> Le mer. 19 févr. 2025 à 12:17, Lynne <d...@lynne.ee> a écrit :
> >
> > On 19/02/2025 06:24, Romain Beauxis wrote:
> > > This is a series of patches to allow proper decoding of ogg metadata in 
> > > chained
> > > `ogg/vorbis, `ogg/flac` and `ogg/opus` streams.
> > >
> > > ## Changes since last version:
> > > * Metadata update is now using a factored out function from the vorbis
> > >    decoder which includes update the underlying AVStream metadata and
> > >    setting AVSTREAM_EVENT_FLAG_METADATA_UPDATED on it.
> > > * New vorbis comment metadata erase existing ones instead of appending
> > > * Test utility is updated to include the stream's metadata
> > > * A test for chained ogg/vorbis metadata is added.
> > >
> > > Last version and discussion: 
> > > https://ffmpeg.org/pipermail/ffmpeg-devel/2025-February/339887.html
> > >
> > > Romain Beauxis (9):
> > >    libavcodec/decode.c: intercept `AV_PKT_DATA_METADATA_UPDATE` packet
> > >      extra data, attach them to the next decoded frame.
> > >    tests: Add stream dump test API util.
> > >    libavformat/oggparsevorbis.c: Don't append new metadata.
> > >    tests: Add chained ogg/vorbis stream dump test.
> > >    libavformat/oggdec.h, libavformat/oggparsevorbis.c: Factor out vorbis
> > >      metadata update mechanism.
> > >    libavformat/oggparseflac.c: Parse ogg/flac comments in new ogg
> > >      packets, add them to ogg stream new_metadata.
> > >    tests: Add chained ogg/flac stream dump test.
> > >    libavformat/oggparseopus.c: Parse comments from secondary chained
> > >      streams header packet.
> > >    tests: Add chained ogg/opus stream dump test.
> > >
> > >   libavcodec/decode.c                   |  20 +++
> > >   libavformat/oggdec.h                  |  14 +++
> > >   libavformat/oggparseflac.c            |  21 ++++
> > >   libavformat/oggparseopus.c            |  13 +-
> > >   libavformat/oggparsevorbis.c          |  29 +++--
> > >   tests/Makefile                        |   4 +
> > >   tests/api/Makefile                    |   2 +-
> > >   tests/api/api-dump-stream-meta-test.c | 175 ++++++++++++++++++++++++++
> > >   tests/fate/ogg-flac.mak               |  11 ++
> > >   tests/fate/ogg-opus.mak               |  11 ++
> > >   tests/fate/ogg-vorbis.mak             |  11 ++
> > >   11 files changed, 298 insertions(+), 13 deletions(-)
> > >   create mode 100644 tests/api/api-dump-stream-meta-test.c
> > >   create mode 100644 tests/fate/ogg-flac.mak
> > >   create mode 100644 tests/fate/ogg-opus.mak
> > >   create mode 100644 tests/fate/ogg-vorbis.mak
> >
> > I fail to see any changes. No mention of
> > AVSTREAM_EVENT_FLAG_METADATA_UPDATED in any of the diffs?
>
> It's because it's reusing what vorbis is already doing here:
> https://code.ffmpeg.org/FFmpeg/FFmpeg/src/branch/master/libavformat/oggparsevorbis.c#L74-L84
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