[MPlayer-users] help wanted: using mencoder to make NTSC DVD from transport stream

Aaron Peterson dopplecoder at gmail.com
Mon Mar 7 14:51:09 CET 2005

On Mon, 7 Mar 2005 15:38:26 +0200, Ville Saari <113762 at vs.iki.fi> wrote:
> On Mon, Mar 07, 2005 at 01:10:36AM -0500, D Richard Felker III wrote:
> > > 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.
> Then we have an optimization problem: is uneven centering more or less
> annoying than the slight quality loss from unaligned chroma blocks?
> Remember I didn't say one should scale to x32, but only that it would
> be even better if the resulting x16 size happened to be x32 too.
> I wouldn't use uneven scaling anyway. I prefer cropping if I want to
> align blocks. Not that I could see a few pixels of stretching in the
> image, but just the knowledge that it is there disturbs me. This
> stretch-phobia in me is probably caused by the people who prefer
> watching 4/3 stuff on 16/9 TV:s in stretched mode and claim to see
> nothing wrong in it.

hahaha...  well we couldn't just waste that extra space on the sides
of the screen since we paid so much for it :-)


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