Analog cameras often have this problem. Not much to do about it other than cropping, which brings it's problems to the party. Cropping requires a decompression stage followed by recompression. The results are seldom pretty.
Virtualdub-MPEG2 can do the decompression, crop and finally recompress and output to avi file. Then for DVD, the AVI file would have to be decompressed, again, then recompressed to MPEG2 DVD requirements. This makes a bad situatuation worse.
Regular CRT type TV sets won't show those lines at the bottom (or the top, or the sides) due to picture overscan. Only LCD, Plasma and computer displays will present them.
Fav quote - "Experience is whatcha don't get 'till ya don't need it no more."
System - Athlon 1.4GHz, Win98, Hauppauge PVR250 receiver and compressor.
Software -Magix Movie Edit Pro 10, Nero 6 + NeroVision Express, Moho 4.61, PSP 8.1, Bryce, Quicktime 6.52 pro, Goldwave 5, DVD-Lab.
Cameras - Panasonic GS9, Canon ES8400V, Canon EOS D20 and Canon A70