On Wed, 13 Sep 2006 13:41:40 -0400 "Timothy Miller" <[EMAIL PROTECTED]> wrote:
> > 4:2:0, the most important subsampling format is missing > > Can you describe it? 4:2:0 is the one, that has a subsampling of factor two in both horizontal and vertical direction. A c&p from a mail from Michael Niedermayer (http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2006-September/044692.html) --- progressive 4:2:0 (mpeg1) Y Y Y Y C C Y Y Y Y Y Y Y Y C C Y Y Y Y progressive 4:2:0 (mpeg2/mpeg4) Y Y Y Y C C Y Y Y Y Y Y Y Y C C Y Y Y Y --- Note that the chroma samples are located half a pixel down vertically in both versions, and half a pixel to the right in the mpeg1 case. IIRC the mpeg2/mpeg4 variant is the most used case. The mail lists also an interlaced variant, but we do not have to care about that unless we make a hardware deinterlacer which we should not IMHO. I have to reread the rest of your mail somewhen else, when i'm a little bit more awake (probably this weekend). Attila Kinali -- egp ist vergleichbar mit einem ikea bausatz fuer flugzeugtraeger -- reeler in +kaosu _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
