On 5 Aug 2011, at 16:04, douglas welton wrote:

> Julius,
> 
> QTMovieLayer is your friend.  If you haven't already, check out the Core 
> Animation QuickTime Layer sample code.  I think you'll find it very helpful.
> 
> regards,
> 
> douglas
> 
> 
Douglas hi,
thanks for the suggestion.
I'll study the code over the weekend. 
I ordered the Core Graphics book by Zarra and Long yesterday.
Today I spent following up on the second of Mike's suggestions by playing with 
a NSView in a child window placed above a QTMovieView located on the parent. 
The need for the child window to have a minimum alpha of 0.05 in order for it 
to receive mouse events has an acceptably small effect on the movie's colour. 
Drawing into the view proceeds like a dream so that's been a super result.

I'd have liked to gain access to the movie frames as they were being displayed 
(in order to capture and store a small part of each frame) but my inability to 
do so is pushing me towards what is likely a more sensible approach anyway.

If I had not asked the list I'd not have thought of either of these approaches.
So thanks again.
Best wishes
Julius   

http://juliuspaintings.co.uk



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