got to thank the owner of
www.leenks.com for this handy script
thought i would share
#!/usr/local/bin/bash
for i in *.mpg *.wmv
do
mplayer -ss 00:00:04 -quiet -frames 2 -vo jpeg -ao null "$i"
rm 00000001.jpg
mv 00000002.jpg "$i.jpg"
done
seeks in 4 seconds, put the videos in a temp dir and run the file.
remember to have mplayer compiled.