[MEncoder-users] Need help remuxing mkv file

[B. Zellers]

I have an MKV file which I want to convert to something (probably MP4) to
play on my XBox 360.  The video is h264, so I'm fine there as far as the
Xbox is concerned.  However, the audio is Vorbis, which the 360 won't read,
so I'm trying to convert it to mp3.
I tired using: mencoder hayate27.mkv -o hayate27.mp4 -ovc copy -oac mp3lame
That gave me the following error:
Too many audio packets in the buffer: (4100 in 938626 bytes).
Maybe you are playing a non-interleaved stream/file or the codec failed?
For AVI files, try to force non-interleaved mode with the -ni option.
Writing index...
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing
vprp header.

I tired adding -ni, which didn't help and returned the same error.  After
checking this mailing list a bit, I tried using -mc0.  The file does output,
but I end up with no video and gibberish for audio.  Can anyone help me out?