ffmpeg is the command line utility I chose – does enough, but not too much (like mplayer, for instance).
YouTube and Google ideal input video

640×480 @ 30 fps MPEG4

Preparation
Grab the ffmpeg package from ATrpms.
# rpm –import http://ATrpms.net/RPM-GPG-KEY.atrpms # scite /etc/yum.repos.d/atrpms.repo# yum install ffmpeg
For speed of capture :
# Mount a RAM disk (as su) :mkdir /media/ffmpegmount -t [...]