[Ffmpeg-devel] upsampling of subsampled video data

Rich Felker dalias
Wed Sep 13 17:28:09 CEST 2006

On Tue, Sep 12, 2006 at 06:37:24PM -0400, Dan Maas wrote:
> dithering and says "oh, that's just noise, get rid of it!" This
> unfortunate interaction dooms most lossy 8-bit codecs to horrible
> banding. In DV or MPEG-2 for instance, to get band-free gradients you

No, the banding is an artifact of the bad colorspace conversion. If
you treat the YUV data as the original picture then the codecs
reproduce it quite well. The mistake is treating the RGB as the source
(unless it's genuine RGB-10 or 12...)


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