How can I extract still images (jpeg?) from a VOB video file?
This is possible with transcode:
transcode -x mpeg2 -i video.vob -y im -F jpg -w 100 -o images
-F of course is the output, -w is the quality, -i the video file, -x the transcoding. -o is the output base name. For more see the manual page. Also have a look at transcode export
sudo apt-get transcode