[FFmpeg-devel] [PATCH] optimize init_vlc

Loren Merritt lorenm
Sun Mar 28 13:03:05 CEST 2010


On Sun, 28 Mar 2010, Lars T?uber wrote:

> Hallo Loren,
>
> On Sun, 28 Mar 2010 04:17:59 +0000 (UTC) Loren Merritt <lorenm at u.washington.edu> wrote:
>> optimize init_vlc().
>> Reduce worst case time from O(N^2) to O(N*log(N)).
>> Reduce average case by a factor of 7 in ffv2 (total decoding speed +4-25%)
>
> is this ffv2 codec visible somewhere on the net? Or just a small README/doc/idea paper?

http://akuvian.org/src/x264/ffv2.94.diff

Currently has no important options, so `ffmpeg -vcodec ffv2` suffices to 
test it.

--Loren Merritt



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