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I had being conducting some experimentation with my Beagleboard and camera. The camera was working perfectly well initially. Later I extended my experiments by disabling the 'auto-exposure' and manually setting the value myself. But doing this alone made the camera function to be so slow by about 15x times the previous performance.

What can be the reason?

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Does re-enabling auto-exposure restore the speed? Also, which webcam? –  derobert Sep 28 '12 at 15:48
    
i am using Logitech-C110. Yes re-enabling restores the speed! –  Anoop K P Sep 28 '12 at 16:04
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The capture speed and exposure time are related -- if you're exposing the CCD for 100 msec per frame, you'll get a maximum of 10 frames per second, whereas exposing the CCD for 1000 msec per frame means you can't get more than 1 frame per second. Normally you control something like the line exposure time in a CCD, not the frame exposure time, but it's the same idea.

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Were you referring to Frame Transfer CCD? I couldn't fetch much information about line exposure time. I think this is exactly the reason for slowness. –  Anoop K P Sep 29 '12 at 6:54
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