Changing AVIs to MP4s

[wallywalters]

I have a few dozen videos in the AVI container which I'd like to rewrap as MP4s. Internally, the video is h.264 and the audio is aac in all. Is there any quick-and-dirty freeware that'll let me change them all at once (or even a batch file)? I've tried MP4Box and YAMB but couldn't get either to work. Thanks!

[Baldrick]

You could try ffmpeg,

for %%a in ("*.avi") do ffmpeg -i %%a -vcodec copy -acodec copy %%~na.mp4

and put it in a .bat file in the folder with all the avi files.

[wallywalters]

I tried ffmpeg too, but couldn't get the syntax right. That's why I'm not a programmer, I guess. Thanks!