[MPlayer-users] -vo jpeg output

[Geoff]

I'd like to use mplayer to output jpegs from a video clip. I have used -vo 
jpeg and it works.

Now I want to do something a little different.

I want to capture jpegs from a 30 sec clip and save them in grayscale. I also 
want them to be captured at a different rate than the original clip, say 
15fps instead of 30fps. So instead of 900 jpegs from a 30 sec clip I get 450 
jpegs.

I have tried the incredible array of switches and read the man page over and 
over and any way of doing this eludes me.

Anyone have any suggestions?

THNX,
Geoff
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