When I select one file to convert from ".mpg" format to ".mp4" format in Winff, it converts nice! but when I try to convert many ".mpg" files, I see only one file in output folder! and guess Winff always rewrite on it!...How I can solve this problem?
I'm not familiar with WinFF, but, in general,
should do the trick.
Be sure to run this the first time with 'echo WinFF' in place of 'WinFF' to see what commands will be generated.