[Ffmpeg-devel] VC-1 quarterpel interpolation

Edsö, Tomas Tomas.Edsoe
Thu Mar 8 18:00:51 CET 2007

Hi all!

I noticed that ffmpeg interpolates VC-1 bicubic quarterpels horizontal direction first, then vertical. The reference decoder does this vertical first, then horizontal. This is also what the specification tells you to do. Since rounding is performed after vertical filtering, this should lead to different results. 

This seems lika a possible bug. Has anyone already fixed this or am I wrong in any way?

Best regards
/Tomas Eds?
tomas.edso at anoto.com

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