[MPlayer-users] help wanted: using mencoder to make NTSC DVD from transport stream
D Richard Felker III
dalias at aerifal.cx
Mon Mar 7 07:10:36 CET 2005
On Sun, Mar 06, 2005 at 10:32:17PM +0200, Ville Saari wrote:
> On Sun, Mar 06, 2005 at 12:25:18PM -0500, D Richard Felker III wrote:
> > > However the x16 vertical size has the advantage of aligning the
> > > edges of the black bars with the luma blocks improving the compression
> > > efficiency. x32 would be even better because then the also the chroma
> > > would align.
> > No, x16 already aligns the chroma. No need for 32, ever.
> No it doesn't, because the expansion consists of two black bars,
> which need to be x16 each.
> For example if you scale=720:368,expand=720:480 then the black bars will
> be (480-368)/2 = 56 pixels each. Not divisible by 16 although 368 is.
Just don't use the same size for both! Duh.. ;)
Make one 48 and the other 64.
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