[XviD-devel] Display Aspect Ratio -> Pixel Aspect ratio solution
dknop at stud.uni-goettingen.de
Fri Dec 12 14:10:37 CET 2003
(hm, new codename for beta3? ;) )
I was looking into aspect ratio addition to VfW GUI and started with a
small hack - setting frame.par to the #defines in xvid.h. Unfortunately
this isn't really what (windows-)users expect when they choose an aspect
So I want to make it Display Aspect Ratio in the GUI and abuse the
par_height and par_width for that. (I.e. encoder gets fed with a 640x240
image and a 4:3 DAR - set par_height to 2 and par_width to 1.). This
would work with mplayer (verified). Hardware players should work with
that, too. Only some windows players/decoders would have problems with
such anamorphic encodes due to the rescaling necessary after building a
directshow filter graph.
On the other hand, people who want anamorphic encoding are capable of
using a correct player/decoder. Other users won't be affected since the
default will be 1:1 PAR/DAR.
Is that too much of a "hack" of the standard or can we agree on such an
abuse of the PAR?
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