How user can lost many hours of work if does not avidemux perfect

[tomasz.krzywicki]

The default configuration of some codex has 'Pixel Aspect Ratio' set to 1:1 (fe. MPEG-4 AVC).
Many my files were compatible with this and I noticed something wrong after hundreds conversions.
I have had to convert again many ...
Now I know this bug. More, I have all my configurations defined in Auto menu and I will only use avidemux version when I find this functionality.

I want to appeal on behalf of others , please change this default value to 'As Input' . 
If it will be changed , it can help me too if I will find somewhere (on youtube?) the video with correct ration instead of wrong if the creator have not known about this parameter.

[zakk]

Yes it would be better to have "as input".
But you don't need to reencode evreything, just remux to copy/copy/mkv with proper configuration (bottom left button).