Timestamping the captured frames

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Hi
	Does any one have any idea as to how to find out if there has been
any frame drop during a motion capture using V4l. I heard that there is
a bttv specific ioctl that can do that. But I would like a more generic
one so that copatibility between non-bttv chipset cards can be
obtained. It would also be helpful if could also know as to how many
frames has been dropped.  

regards

-- 
------------------------------------------------------------------------o.
Vinod Kumar M.V.                                                       	||
									||
Project Assistant, Multimedia Systems Lab,			       	||
SuperComputer Research And Education Center,			       	||
Indian Institute Of Science,						||
Bangalore.								||
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Ph No. ( Office )	: +91-80-3092896				||
Ph No. ( Res.)		: +91-80-3337338				||
E-Mail Id.		: vinod@xxxxxxxxxxxxxxxxxxxxxxx			||
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