> 
>       Anyone used ppmtoy4m to create composited from PPM images 
>       (for example from a scanner/camera) for a DVD?
> 
>       It's working - but what I'm ending up with is 720x480 progressive
>       and that's not, as far as I know, legal for use in making a DVD.
> 
>       What I'm doing so far is:
> 
> (generate 720x540 PPM frames) | ppmtoy4m -F 30000:1001 | \

Forgot to mention that if this is meant to be 4:3 aspect, you should 
scale to 704x480 and then pad to 720x480. You can avoid vertical scaling 
using 640x480 ---(scale)--> 704x480 ---pad--> 720x480.

Selva



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