2 audio streams impossible?

[flobbo]

I have been unsuccessful to multiplex my movie with 2 audio streams.
The error I get is this: 29252 s packets cause buffer underflow. The MPEG file might cause error when played.
Am I doing anything wrong or is this normal? According to the guide I was following I did everything right. Also when I tried to play this movie (unauthored) in my software DVD player I was unable to switch between audio tracks.
Now after some research I found a method to avoid the error with other programs but no matter what I do, the second audio track seems to be invisible or just not present. I can't get it to work.
What am I doing wrong or is it simply impossible?

[Vejita-sama]

What program/s and settings are you using? What format are the audio streams in (some programs [eg Ulead] only accept AC3 or PCM)? Is the audio 48khz?

I've authored several DVDs with DVD Maestro with multiple audio streams (and of course commerical DVDs have this feature too). In fact I use to use WinSubMux to make xSVCDs with 2-3 audio streams. So it is possible. Tell us what programs your using and how you authored the m2v and audio files.

[flobbo]

oh sorry I should have included that info.

Programs tried:
bbMpeg and Tmpeg
Audio is: 41khz, 224kbps,

I just loaded the 3 (1 video, 2 audio) files into the multiplexer of Tmpgenc and clicked on start. Then I burned the mpeg file as a standard compliant svcd using Nero.