Error...why?

[haderach]

Im trying to make a VIDEO_TS folder to burn to a DVD-R and im having trouble. I hit the fast-DVD preset and all goes fine until its about 70% encoded then it fails and i get this-

Encoding started on Tue Jun 15 13:35:14 MDT 2004
Input #0, yuv4mpegpipe, from 'pipe:':
Duration: N/A, bitrate: N/A
Stream #0.0: Video: rawvideo, yuv420p, 720x480, 29.97 fps
Output #0, rawvideo, to '/Users/melissawinkler/Desktop/torr/SonYouth.mpv':
Stream #0.0: Video: mpeg2video (hq), 720x480, 29.97 fps, q=2-20, 4000 kb/s
Stream mapping:
Stream #0.0 -> #0.0
[mpeg2video @ 0x2320dc]rc buffer underflow
video:884739kB audio:0kB global headers:0kB muxing overhead 0.000000%
bench: utime=2826.690s
Input #0, mpeg, from '/Users/melissawinkler/Desktop/torr/SonicYouth.mpg':
Duration: 00:54:27.4, bitrate: 1394 kb/s
Stream #0.0: Video: mpeg1video, 352x240, 29.97 fps
Stream #0.1: Audio: mp2, 44100 Hz, stereo, 224 kb/s
Output #0, ac3, to '/Users/melissawinkler/Desktop/torr/SonYouth.ac3':
Stream #0.0: Audio: ac3, 48000 Hz, 5:1, 448 kb/s
Stream mapping:
Stream #0.1 -> #0.0
video:0kB audio:178388kB global headers:0kB muxing overhead 0.000000%
**ERROR: [mplex] MUX STATUS: Frame data under-runs detected!

The video plays fine in quicktime. what could be wrong? I dont know if it helps, but here is the info-

VIDEO: mpeg-1, size: 352x240, 29.970 fps, 1150 kbps. AUDIO: mp2, 44100Hz, 224 kbps.

Thanks.

[haderach]

whoops.....this was supposed to be in the ffmpegX section.