Re: QTMovie grabing while playback
Re: QTMovie grabing while playback
- Subject: Re: QTMovie grabing while playback
- From: Jean-Daniel Dupas <email@hidden>
- Date: Wed, 23 Apr 2008 20:15:39 +0200
Le 23 avr. 08 à 19:58, Randall Meadows a écrit :
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).
This delegate method was also added to QTMovieView. It's really
helpfull for example if you want to apply some effect or if you want
to insert text in your movie.
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