I would like to resize the pictures that make up a video clip. I can play the video in full screen with mplayer, but when I output the individual pictures they are small (450 X 320 I think). How can I resize the individual frames? I'm using this:

mplayer -vo jpeg -nosound video.flv

the images that come out are at native resolution, so any resizing will cause softness, but, to resize images as they are being computed:

mplayer -zoom -xy 600 -vo jpeg -nosound video.flv

specifying an xy value of less than 8 will scale the image by a factor (i.e. -xy 2 would double the image size). Anything above 8 will be used as the width & the height will be calculated to maintain aspect ratio. If you don't want to maintain aspect ratio, you can give exact x,y values like so:

mplayer -vf scale=600:600 -vo jpeg -nosound video.flv

.. which would make your output images exactly 600x600.

looks good-thanks!