> the active area is stored in mpeg1/2 and should be used, its in the
> pan scan variables IIRC, that way there is a very close to correct
> mathematical relation between SAR, DAR and the active area in the
> BT601 case
> There should be no problem here with complying to BT601 and the
> video coding specs

Close isn't good enough. It has to be right.
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