What problems do you see in this method of capturing a television program?

Open virtualdub
Capture mode
Set to 29.97fps, 480x360, No filters, 44hz uncompressed audio
Compression set to MPEG-4 VC2, Data rate 6,000 (that's the max)
F6 to capture/record (it will record video at about .75 MB/s)

Thanks for reading. I didn't notice any difference by using MPEG-4 VC2 from the lossless Huffyuv (even though I'm sure there is). Can anyone explain the problems with this method, or perhaps suggestions?

For my final capture I:
Use filters
Use the XviD compression tool @ 93-97 quality and files come to 150-250 MB on a 22 min video