[MPlayer-dev-eng] [PATCH] new option "-singleshot"

[Alexander Neundorf]

Hi,

usage:

mplayer -singleshot -ss 30 -ao null -vo jpeg /blah/foo.avi

will produce a screenshot at second 30 and then exit.

Maybe I've overseen something, but I was looking for a way to get single 
images out of a video file. VOCTRL_SCREENSHOT seems not to be implemented in 
any vo driver.
So I added the new option -singleshot, which will exit mplayer after 
rendering the first image.
In combination with "-ss somewhere" the first rendered picture isn't at the 
specified position, but the first of the file, the second is a mixture of the 
first and the second (I guess the first was an I-frame, and the frame at the 
seek-position a B or P frame, which was then rendered relative to the very 
first I-frame, maybe).
That's why it doesn't actually render the first image, but the 20th (this 
should be large enough to be behind a correct I-frame). 

I attached the diff -bup against current cvs.

Bye
Alex
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