[MPlayer-dev-eng] [PATCH] new mpeg muxer

D Richard Felker III dalias at aerifal.cx
Thu Feb 24 00:42:31 CET 2005


On Wed, Feb 23, 2005 at 06:27:49PM -0500, D Richard Felker III wrote:
> - i seem to occasionally get weird out-of-order glitched frames during
>   really high motion scenes. is this due to buggy reordering of some
>   sort in the muxer, failure to enforce closed gops, or something
>   else? i think i can extract small samples that exhibit the problem
>   if you want to see one.

fyi, the "noreorder" option makes the problem go away, but i have no
idea if the resulting file is "valid". i'm very confused what
reordering would be needed for anyway, since the encoder always
outputs frames in decoding order, not display order.

with that said, i expect the bug is occurring when lavc's scene change
detection kicks in and causes a new gop to start somewhere it
shouldn't. i'm going to try disabling scene change detection and
reenabling reordering and see if that fixes the problem too. but i'm
still confused why any reordering at the muxer stage would be needed
or desirable.

rich




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