You need to extract all frames of a video and save them as .jpg images files ? Transcode can do the job for you thanks to this command line:
transcode -i video.avi -y im
Of course with some parameters tweaking you will be able to save images in any format.
Do this on little video only, else the number of generated files will be so huge that all your hard drive space will be eaten in a couple of minutes. Be carefull !
This worked really well for me. For 90 secs of 720×576 divx i got 2100 jpegs, which took up 600MB and took 11mins on a Athlon 2500. If you are just after the frames from the beginning of something then just start it and Ctrl-C when you have dumped enough frames. It doesn’t get any easier!
Peace.