AVI/Xvid MP3 to AVI/Xvid AC3

[MarquisdeOz]

Hi,
I've got a couple of video files whose audio I want to convert to AC3

The files are mpeg-4/xvid and MP3. I don't want to touch the video codec.

What would be the best, not too hard solution that supports batch conversion?

I used AVItoac3 to get the audio to ac3 but am not sure how to get the ac3-files back in the avi-file or if this is the best way to get the whole thing done.

[Baldrick]

You can use avimuxgui or virtualdubmod to add/multiplex the ac3 to the old avi file. In virtualdubmod open the avi, under video choose direct stream copy and under streams add the ac3 file , save as a new avi.

[MarquisdeOz]

I think I just wrote my first workin ffmpeg script...
for %i in (*) do "path\to\ffmpeg.exe" -vcodec copy -i "%i" -acodec copy -i audio/"%i" arf/"%i"

All I had to to is rename to .ac3 files to .avi

Will try you solution though, the renaming makes this script kinda impractical.

[Baldrick]

Yep, ffmpeg works fine too.