> please suggest reasons for flickering video  anytype of suggestion is
> welcome.thanx in advance..

You really need to be more specific in your questions -- there are
dozens of reasons why you might have 'flickering video'.

Firstly, describe the flickering: is it jerky motion? are you seeing
flashes of black? is the picture shearing horizontally?

Secondly, you need to describe your software architecture: are you
using a VideoProvider? Which one? What surface is it rendering to? Is
that a layer surface or a not? What is the buffer mode of that
surface? If the VideoProvider does not render directly to the layer
surface, how are you blitting it across? What buffer mode does the
layer have? Are you using an overlay layer? What hardware are you
using? What pixel formats are you using?

You've asked a lot of questions on these mailing lists but almost none
are easy to reply to because of the lack of detail.  There are lots of
people who will try to help you but you need to put a bit more effort
into describing the problem (and less into excessive please, please
help, thanks etc. etc.)

Regards,

Mark

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