From: Nicolas Gaullier <nicolas.gaullier@cji.paris>
To: ffmpeg-devel@ffmpeg.org
Cc: Nicolas Gaullier <nicolas.gaullier@cji.paris>
Subject: [FFmpeg-devel] [PATCH v2 0/1] avformat/demux: Fix accurate probing of durations in mpegts/ps
Date: Mon, 18 Mar 2024 23:23:57 +0100
Message-ID: <20240318222358.2150026-1-nicolas.gaullier@cji.paris> (raw)
v1: There was an issue with teletext where resolution is set just once at decoder init
(teletext resolution is fixed/hard coded),
so it is somewhat fragile: when a demuxer context update occurs, it is lost/overriden
by avcodec_parameters_to_context(sti->avctx, st->codecpar) in read_frame_internal.
They could have been other scenario besides teletext, I don't know.
v2: So now at estimate_timings_from_pts, with one or more seeking involved (seeking
is detected by the mpegts demuxer and set last_vn=-1, so pmt is forced/updated
and results in demuxer context update),
it is required to preserve the info in codecpar at first.
Thanks to Michael for reporting the issue.
Nicolas Gaullier (1):
avformat/demux: Fix accurate probing of durations in mpegts/ps
libavformat/demux.c | 36 ++--
tests/ref/fate/concat-demuxer-simple2-lavf-ts | 170 +++++++++---------
tests/ref/fate/ts-opus-demux | 4 +-
3 files changed, 100 insertions(+), 110 deletions(-)
--
2.30.2
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next reply other threads:[~2024-03-18 22:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-18 22:23 Nicolas Gaullier [this message]
2024-03-18 22:23 ` [FFmpeg-devel] [PATCH v2 1/1] " Nicolas Gaullier
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