I'm getting an odd problem with video that doesnt have
a 1:1 SAR.
If I use content with a SAR set, ffdshow appears to get
the AR correction wrong.
An example you should be able to reproduce. DVD mpeg2
content, with a DAR of 16/9 and a DAR of 64/45.
Enabling AR correction in the resize results in in
ffdshow outputting as if it were 4:3.
I suspect this issue may be because the AR correction
calculations don't take correct account of the SAR?
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