[cpia] Single frame captures and autoexposure

Nick Holloway Nick.Holloway@alfie.demon.co.uk
5 Feb 2000 12:32:36 -0000


One problem with running vidcat at intervals to grab a single shot at
intervals is that auto-exposure doesn't get a chance to work (even when
run every minute).

Currently, before running vidcat, I'm running a perl script which
blindly reads 30 frames to get the autoexposure to settle down first.
This works, but isn't very pretty.

How does the Windows driver cope with this, or other v4l devices?  Is it
the responsibility of the calling application (such as vidcat) to keep
requesting frames and looking at the brightness until it settles down,
or should the kernel be responsible for this?


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