[FFmpeg-user] mkv to avi errors

[Jon Drukman]

Rick C. <rickcorteza <at> gmail.com> writes:

> Great thanks for the quick replies.  I actually thought lame could do surround
(obviously I was wrong) or
> either that FFmpeg would downmix it automatically (I guess not the case).  If
I would specify -ac 2 then it
> should work correct?
> 
> And yes to avoid losing my surround I will go ac3.  Thank you!

-ac 2 will give you a stereo mp3.  if you want to preserve the ac3, just use
-acodec copy.