ffmpeg jpeg images on delay

[amateurcanada]

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

[AntiChrist]

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.

[evolmachine]

this is perfect... thanks