Can anyone give me a bit of advice ... I'm trying to set up a webcam.
When I connect to the camera using cheese, lucview or xcam, the
picture is black for the first few frames, and gradually adjusts until
the picture is visible.

v4lctl snap gives me a black picture.

I suspect that during the first few frames after opening the device the
camera is doing some auto-exposure adjustment.

Is there any way anyone knows of getting a picture (programmatically)
and allowing the camera to adjust its aperture/shutter speed or
whatever it does?  I've tried webcam and webcamd but they just deliver
black pictures.

The obvious attempt to take two pictures in a row gives two black
pictures.

$ v4lctl snap jpeg 320x240; v4lctl snap jpeg 320x240


Peter C


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