ffmpegX failing to convert .MOV to .avi mpeg4…?
On my MacBook I dropped in a .MOV file into ffmpegX, selected DivX AVI and clicked Encode… with no luck.
The error message I kept getting finished with:
“ Movie-Aspect is undefined - no prescaling applied.”
The solution was to go into Options and change Scaling method from Fast Bilinear to Bilinear.
Plenty more discussion on this here: