[FFmpeg-devel] [PATCH] lavfi: add kerndeint filter

Michael Niedermayer michaelni at gmx.at
Sat Oct 20 02:43:41 CEST 2012

On Sat, Oct 20, 2012 at 02:33:46AM +0200, Michael Niedermayer wrote:
> On Thu, Oct 18, 2012 at 09:50:53AM +0200, Jérémy Tran wrote:
> > This is a port of the vf_kerndeint filter (libmpcodecs/vf_kerndeint) by
> > Donal A. Graft (original avisynth plugin author).
> > 
> > The filter works fine using YUV colorspace.
> > When using RGB, it is not binary equal with mp=kerndeint (the output video
> > looks fine so this may be a little mistake I did somewhere).
> what is different ?
> are the differences just +-1? larger?
> just luma?
> just chroma?
> just right border?
> just left?
> all pixels ?
> awnsers to these may help in finding what causes the difference

also if you see no difference in the filter, its possible theres a
difference outside (a addional scale filter or bug) dumping the
filters input and output directly may be worth it if you suspect this.

And it uses floats, rounding with floats can differ due to compiler
optimization differences even when the code is practically the same
knowing if the differences are just +-1 could give a hint toward this


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I have often repented speaking, but never of holding my tongue.
-- Xenocrates
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