[MEncoder-users] 5.1 sound

[RC]

On Tue, 06 Nov 2007 12:10:03 +0100
scostas <scostas at det.uvigo.es> wrote:

> If the original video already has 5.1 sound, but is NOT coded with 
> AC3, is enough to add "-channels 6"

Yes, but channel order is likely to be completely wrong.

> If the original video has 5.1 sound, is coded with AC3, and I use 
> "-oac copy", must I add the "-channels 6"

Makes no difference.  You can't copy 2 channels from a 6 channel
stream. The multi-channel audio stream is either copied, or not.

> Finally, if I have a video with multiple audio languages, and they are
> NOT coded in AC3, how can I recompress all the languages in AC3 in the
> final MPEG-2 video file? (with and without 5.1 sound). 

You'll have to encode each of the tracks seperately, and individually
add them to the final video.  With what tool (for vobs), I don't know...