[FFmpeg-user] A problem with scale filter

[Roger Pack]

>
> The scale filer being applied to produce M4V or MP4 file format inserts
> wrong pixel aspect ratio box, and incorrectly sets the frame size in the
> track header box. As a result target aspect ratio is the same as source file
> aspect ratio, though I've defined target width and height explicitly. As I
> believe the problem is here:
>
> [SAR 25:36 DAR 5:3]
>
> instead of
>
> [SAR 1:1 DAR 12:5]
>
> Taking into account that 12:5 = (36x5)/(25x3) (see digits above), I believe
> the bug is in these calculations - wrong digits are at wrong places.
> Something like that.

maybe submit a bug report? or ping the devel side?