divx/svcd with ac3-dolby-digital/dts ????

for people that love to see movies with multichannelsound, is it possible to encode a divx or an svcd with ac3??
it doesn't really work on my system!
wich player supports it (vlc, mplayer)??? wich soundcard(usb) is cool for that? does anyone has experiences with that topic??

[major]

The SVCD standard does not support ac3 sound, but if you encode a SVCD from VOB with AC3 sound with ffmpegX, the sound is downsampled to MP2 in Dolby Surround mode, so any Dolby Surround system will be able to play the spatial effects.

Concerning DivX encoding, if your source (eg VOB) has AC3 sound, ffmpegX let you encode it by copying directly into the DivX file, just select "AC3" in the audio codec popup menu.

Check http://guide.apple.com/ for multichannel speaker systems for Mac. Surround systems wil extract the multichannel information from standard stereo audio. Dolby digital is encoded in separate channels and will need specific setup.

[kay101011]

but there's no multichannelsound after the encoding ... just stereo-ac3.
my terminal-output:

Encoding started on Wed Nov 19 19:02:01 CET 2003
Input #0, mpeg, from '/Neuer Ordner/Movies/NNN/TITLE01-ANGLE1.VOB':
Stream #0.0: Video: mpegvideo, 720x576, 25.00 fps, 9800 kb/s
Stream #0.1: Audio: ac3, 48000 Hz, 5:1, 448 kb/s
Output #0, avi, to '/Neuer Ordner/Movies/AMERICANBEAUTY1/movie.avi':
Stream #0.0: Video: mpeg4 (hq), 480x200, 25.00 fps, q=1-15, 1419 kb/s
Stream #0.1: Audio: ac3, 48000 Hz, stereo, 192 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #0.1
Press [q] to stop encoding

there is no way to select 5:1 in ffmpegx, is it because of the demo-mode??

[major]

It should be multichannel by using the DivX preset - not the fast DivX preset.

[kay101011]

ok ... only with mencoder ... i like the ffmpeg-encoder more, but i'll give him a try.

[meldavid]

How about the reverse?

Let's say I have a DivX or Xvid file and it has an ac3 audio soundtrack. How can I demux so I get the ac3 as a separate file to the video?

Is there a Unix tool to do this? I can do it on Windows with BeSweet but I'd like to know the Mac method.