[Ffmpeg-devel] VC-1 quarterpel interpolation
Mon Apr 23 09:04:58 CEST 2007
Any updates on this? In general there are still a lot of artifacts in
ffmpeg's VC-1 decoding.
On 3/8/07, Kostya <kostya.shishkov at gmail.com> wrote:
> On Thu, Mar 08, 2007 at 06:00:51PM +0100, Eds?, Tomas wrote:
> > 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?
> I'll see tomorrow if changing order gives any change on decoding.
> > Best regards
> > /Tomas Eds?
> > tomas.edso at anoto.com
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