SMPEG : blank (black) frame

I have some kind of problem with SMPEG. I compiled it from the current
CVS sources, I captured a video with xvidcap, mplayer plays it just fine
(and reports it’s mpeg1), but plaympeg shows a window filled with black.
It detects the video size correctly.

Since I never used SMPEG before and I’m using unmodified SDL and SMPEG,
I have absolutely no idea about what can be wrong here. Any clues?

Thanks,
–Gabriel–
Gabriel Gambetta
Mystery Studio - http://www.mysterystudio.com
Gabriel on Graphics - http://gabrielongraphics.blogspot.com