#3743: mpeg2video decoder loses frames when progressive_sequence flag flips
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Reporter: SianLiao | Type: defect
Status: new | Priority: normal
Component: avcodec | Version: git-master
Keywords: mpeg | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug:
In mpeg2video streams where progressive_sequence flag flips, one-frame
will be lost due to context reinitialized in mpeg_decode_postinit call
Without entering the initialization block the otherwise lost frame is
decoded correctly.
(ffmpeg binary causes a duplicate frame in that position when decoding)
How to reproduce:
{{{
Decode an mpeg2 stream with progressive_sequence flipping
ffmpeg version 2.2.1 and prior
}}}
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Ticket URL: <https://trac.ffmpeg.org/ticket/3743>
FFmpeg <https://ffmpeg.org>
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