I have Avidemux 2.6.4 and it was working PERFECTLY. Then I installed Movie Maker (I had to string together scenes with dissolves). Now I load an .mp4 file into Avidemux like I did before, do some mods like before (cropping, flip) and when I save - it doesn't seem to go through any processing. There's a hesitation and then 'ding', file saved. But instead of a FLV1 (flash) avi, it's a RAW file and there's no video info.
Did the Movie Maker install change something I can change BACK?
Thanx.
Don't know but if you rename avidemux.exe to avidemux_portable.exe (to run it as a portable) the does it still fail?
Maybe Movie maker overwrote a common library (DLL), although I think avidemux is fully self contained.
Try reinstalling avidemux.