Hi, For fully indexed MOV video tracks with composition time offsets, decode-order sample durations can be wrong for sparse B-frame streams. This patch builds packet durations from adjacent presentation timestamps and uses them when finalizing packets.
The existing STTS-derived duration remains the fallback for incomplete indexes, invalid or duplicate timestamps, the final sample, and fragmented inputs whose index changes after parsing. A self-contained FATE test covers a sparse VFR MPEG-4 stream with B-frames and verifies packet PTS, DTS, and duration values. Tested with the self-contained FATE suite, fate-source, and: - fate-mov-vfr-bframes-duration - fate-mov-1elist-1ctts - fate-mov-3elist-1ctts - fate-mov-elist-starts-ctts-2ndsample - fate-mov-1elist-ends-last-bframe - fate-mov-2elist-elist1-ends-bframe - fate-seek-test-iibbibb-neg-ctts-mp4 - fate-mov-mp4-multiple-stsd-muxing Thanks, panboxiaosa
0001-avformat-mov-derive-packet-durations-from-presentati.patch
Description: Binary data
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