ffmpeg jpeg images on delay
 

We all know ffmpeg takes jpeg images from wmv/mpg/flv files. I need one generated per minute and one generated per 30 seconds. What flags do i set - i have - which randomly generates a ton of files.:
ffmpeg -i test.wmv -r .05 -s 480x270 -sameq -f image2 thumbs%02d.jpg

ffmpeg -i some.avi -an -r .1 -y test%d.jpg


The '-r' option specify the rate, in frames per second. In the above command the rate is '.1', so one frame grab is generated for each 10 seconds of video.

this is perfect... thanks