I don't know if anyone ever experienced that but....
Whenever I multiplex an MPEG-2 Video file with an audio file with
BBMPEG (I use that because it has the function to limit the file size to 800MB) it gives me a whole bunch of "Underflow at point XXX)...
In the end it tells me that the file might not play back correctly (which is so : video stutters, audio gets outta sync...) and i should either lower the video bitrate (now we don't wanna do that right

or increase the startup delays (already tried that, didn't change anything...
Did anybody else have this problem?