[PATCH] avformat/mov: fix sidx timestamp handling, use PTS instead of DTS
The 'sidx' earliest_presentation_time field is defined as PTS. Previously, it was incorrectly assigned to DTS, which could cause sync issues. This commit fixes the assignment to PTS as noted in the existing FIXME comment. --- libavformat/mov.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavformat/mov.c b/libavformat/mov.c index 009ddfec80..f651d0387b 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -5892,9 +5892,9 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom) } else if (has_sidx && !c->use_tfdt || fallback_sidx) { // FIXME: sidx earliest_presentation_time is *PTS*, s.b. // pts = frag_stream_info->sidx_pts; - dts = frag_stream_info->sidx_pts; + pts = frag_stream_info->sidx_pts; // <--- FIXED av_log(c->fc, AV_LOG_DEBUG, "found sidx time %"PRId64 - ", using it for dts\n", frag_stream_info->sidx_pts); + ", using it for pts\n", frag_stream_info->sidx_pts); // Update log message too if you like, but logically just changing to pts is the key. } else { dts = sc->track_end - sc->time_offset; av_log(c->fc, AV_LOG_DEBUG, "found track end time %"PRId64 -- 2.49.0.windows.1 -- Disclaimer This email is governed by the Disclaimer Terms of somaiya.edu <http://somaiya.edu> which may be viewed at https://www.somaiya.edu/en/email-disclaimer <https://www.somaiya.edu/en/email-disclaimer> Finally, please do not print this email unless it is necessary. Every unprinted email helps the environment.
Hi Vivek On Wed, Dec 31, 2025 at 05:41:22PM +0530, Vivek Jain via ffmpeg-devel wrote:
The 'sidx' earliest_presentation_time field is defined as PTS. Previously, it was incorrectly assigned to DTS, which could cause sync issues. This commit fixes the assignment to PTS as noted in the existing FIXME comment. --- libavformat/mov.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavformat/mov.c b/libavformat/mov.c index 009ddfec80..f651d0387b 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -5892,9 +5892,9 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom) } else if (has_sidx && !c->use_tfdt || fallback_sidx) { // FIXME: sidx earliest_presentation_time is *PTS*, s.b. // pts = frag_stream_info->sidx_pts; - dts = frag_stream_info->sidx_pts; + pts = frag_stream_info->sidx_pts; // <--- FIXED
This taken as a whole is wrong. First step is explaining why there is a FIXME comment and outcommented code only after that is understood can this be fixed, but either way the fixme and fix cannot co-exist. Either its fixed or not also the last change to this line should be considered 0de3b1f3588e1fc9e292098902ac79d8dd9792bc
av_log(c->fc, AV_LOG_DEBUG, "found sidx time %"PRId64 - ", using it for dts\n", frag_stream_info->sidx_pts); + ", using it for pts\n", frag_stream_info->sidx_pts); // Update log message too if you like, but logically just changing to pts is the key. } else {
This comment is not usefull thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB What is money laundering? Its paying someone and not telling the government.
participants (2)
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Michael Niedermayer -
Vivek Jain