Re: QTMovie grabing while playback
Re: QTMovie grabing while playback
- Subject: Re: QTMovie grabing while playback
- From: Randall Meadows <email@hidden>
- Date: Wed, 23 Apr 2008 11:58:02 -0600
On Apr 23, 2008, at 11:30 AM, Bob Smith wrote:
On Apr 23, 2008, at 10:05 AM, douglas a. welton wrote:
QTMovieView has a delegate method
- (CIImage*) view: (QTMovieView *)Target_View willDisplayImage:
(CIImage *)New_Image
This method gives you a CIImage to play with before it is displayed
in the Target_View. Check the header file for QTMovieView.h (near
the bottom). I think the the MyMovieFilter sample code uses this
method.
I cannot find this method in the documentation, where is it
described? Is it in the public interface? This is the perfect
solution to a similar problem I'm having with a Cocoa app using
QuickTime, but I don't want to use undocumented private APIs.
I think he means QTCaptureView. It's not undocumented; you'll find it
in the QTCaptureView class reference material (available in QT 7.2.1
and later).
Whether it's relevant for you or not depends on how you're displaying
the movie. I *think* (but am not 100% sure) that this delegate method
is only valid for this particular type of view (which displays a video
preview of a capture session).
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