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commit 6dba2558c0d439162d8e88f7182268594c9e2c93 Author: Martin Mirchev <[email protected]> AuthorDate: Wed Oct 21 19:01:04 2026 +0800 Commit: James Almer <[email protected]> CommitDate: Wed Oct 21 16:32:08 2026 +0000 avformat/mov: check the stream group type when updating IAMF streams The lookup of the stream group for each IAMF audio element compared only the group id and kept the last match. Mix presentation groups are created after the audio element groups and use the mix_presentation_id as their id, so if a mix_presentation_id equals an audio_element_id the mix presentation group was picked instead. Its entries are the streams of every audio element, so the same output stream got its index entries filled twice and the av_assert0(!out_sti->index_entries) aborted. Such files are written by FFmpeg's own mp4 muxer, e.g. with two audio elements with ids 1 and 2 and a mix presentation with id 1. Also check the group type. Keep using the last match: audio element ids are only unique within one IAMF track, and the groups of the current track were just appended, so the last match is the audio element of the current track even if an earlier track uses the same id. Signed-off-by: Martin Mirchev <[email protected]> --- libavformat/mov.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavformat/mov.c b/libavformat/mov.c index 910df844dc..790087c92a 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -5520,7 +5520,8 @@ static int mov_update_iamf_streams(MOVContext *c, const AVStream *st) const AVStreamGroup *stg = NULL; for (int j = 0; j < c->fc->nb_stream_groups; j++) - if (c->fc->stream_groups[j]->id == iamf->audio_elements[i]->audio_element_id) + if (c->fc->stream_groups[j]->type == AV_STREAM_GROUP_PARAMS_IAMF_AUDIO_ELEMENT && + c->fc->stream_groups[j]->id == iamf->audio_elements[i]->audio_element_id) stg = c->fc->stream_groups[j]; av_assert0(stg); -- To stop receiving notification emails like this one, please contact [email protected]. _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
