clive
clive is a command line program that extracts videos from YouTube and
Google Video websites. It supports embedded video extraction, and can
be used with ffmpeg to re-encode the extracted videos to different
video formats (avi, mpeg, flv). 

dumpmpeg
dump a picture from video

gmencoder - frontend to mencoder
iriverter - frontend to mencoder
cinelerra - video editing
avidemux - video editing