[FFmpeg-devel] [PATCH] swscale: Fix NV12/NV21 support
Thu May 21 16:38:53 CEST 2009
On Thu, May 21, 2009 at 04:01:58PM +0300, Ville Syrj?l? wrote:
> On Thu, May 21, 2009 at 05:30:19AM +0200, Michael Niedermayer wrote:
> > On Wed, May 20, 2009 at 10:03:05PM +0300, Ville Syrj?l? wrote:
> > > Hi,
> > >
> > > NV12/NV21 support is currently broken due to the introduction of
> > > planarCopy. The logic for selecting planarCopy assumes that all
> > > planar YUV formats with the same subsampling factors are compatible.
> > > That is not the case for NV12/NV21. The simple solution is to
> > > never use planarCopy for NV12/NV21.
> > patch probably ok
> > i assume this fixes some values from swscale-example?
> Didn't know about that one. I just noticed the problem with mplayer when
> trying to use nv12 as the vo format. The output was b/w, after the patch
> the colors are back.
> I just tried swscale-example and can't see any difference in the output
> w/ or w/o the patch. Oh, I see that swscale-example will never test
> nv12/nv21 because they are not supported as input formats. So even in
> the nv12 -> nv12 case where planarCopy might work the last step to
> convert back to yuv420p will always fail.
maybe you want to add nv* input support :) ?
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
Old school: Use the lowest level language in which you can solve the problem
New school: Use the highest level language in which the latest supercomputer
can solve the problem without the user falling asleep waiting.
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