VirtualDub aspect ratio

[MarioB]

Hi all,

I'm using VirtualDub MSU Cartoonizer Filter to 'cartoonize' some home made videos I made with my kids. Although the processing mode is extremely slow, it seems the final results are pretty good except the following: the original aspect ratio of my films is 16:9, but the final film I get (*.avi) is 4:3 with both sides squeezed. Well, I'm not a VirtualDub expert, so maybe I'm doing something wrong...

Can you please tell me what options/configurations I must change in VirtualDub to keep the original aspect ratio on the final film?

Thanks in advance,

Mário

[jagabo]

VirtualDub ignores aspect ratios. It deals only in pixels. If you want to set a display aspect ratio (DAR) or pixel aspect ratio (PAR) you have to do it in the output compression codec. If the compression codec doesn't support PAR/DAR flags you manually specify the aspect ratio in whatever program is later reading the file.

[redwudz]

VD doesn't honor aspect ratio flags. You might run it through MPEG4 Modifier to see if that would correct it. I would expirement on a copy, though.

[manono]

Rather than setting a DAR/PAR, I'd recommend just resizing prior to encoding. If they're really 16:9 (and 720x576?), maybe try 624x352 or some other roughly 1.78:1 ratio.

And if they were originally 720x576, the output isn't 4:3 but the original 5:4 (720/576=1.25). Like they said, VDub ignores the DAR.