[MPlayer-dev-eng] New inverse-telecine filter

Zoltan Hidvegi mplayer at hzoli.2y.net
Thu Dec 4 22:35:45 CET 2003

>   Are you asking how to convert 4:2:2 to 4:2:0 ?  There are
> specifications for this depending on what 4:2:0 standard you are going
> to.  The MPEG2 spec has some details on the filter to use.

Yes, but the MPEG standard actually has two algorithms you have to use
depending on whether the content is progressive or interlaced.  And
many (if not most) progressive DVD players do not do it right, which
is known as the chroma bug.  See
for a detailed discussion.  It mostly talks about upsampling for
playback, but downsampling has the same problems.


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