Comments on: Core Animation Tutorial: QTMovieLayer and Image Animation http://www.cimgf.com/2008/03/05/core-animation-tutorial-qtmovielayer-and-image-animation/ Taglines are for Windows programmers Sat, 13 Mar 2010 01:16:03 -0500 http://wordpress.org/?v=2.9.2 hourly 1 By: Long Pointers » That Sucking Sound Is Java Killing Your Soul http://www.cimgf.com/2008/03/05/core-animation-tutorial-qtmovielayer-and-image-animation/comment-page-1/#comment-595 Long Pointers » That Sucking Sound Is Java Killing Your Soul Fri, 16 May 2008 12:25:05 +0000 http://www.cimgf.com/2008/03/05/core-animation-tutorial-qtmovielayer-and-image-animation/#comment-595 <p>[...] Core Animation Tutorial: QTMovieLayer and Image Animation [...]</p> [...] Core Animation Tutorial: QTMovieLayer and Image Animation [...]

]]> By: links for 2008-04-14 | manicwave.com http://www.cimgf.com/2008/03/05/core-animation-tutorial-qtmovielayer-and-image-animation/comment-page-1/#comment-548 links for 2008-04-14 | manicwave.com Mon, 14 Apr 2008 12:34:13 +0000 http://www.cimgf.com/2008/03/05/core-animation-tutorial-qtmovielayer-and-image-animation/#comment-548 <p>[...] Cocoa Is My Girlfriend » Core Animation Tutorial: QTMovieLayer and Image Animation Drawing Layers In Thin Air [...]</p> [...] Cocoa Is My Girlfriend » Core Animation Tutorial: QTMovieLayer and Image Animation Drawing Layers In Thin Air [...]

]]> By: ewing http://www.cimgf.com/2008/03/05/core-animation-tutorial-qtmovielayer-and-image-animation/comment-page-1/#comment-344 ewing Sat, 05 Apr 2008 00:54:52 +0000 http://www.cimgf.com/2008/03/05/core-animation-tutorial-qtmovielayer-and-image-animation/#comment-344 <p>Funny, I was just going over the QTMovie frameImageAtTime:withAttributes:error: API last night and I stumbled upon this by this without looking for it.</p> <p>Instead of converting from NSImage to CGImageRef, this withAttributes: version of the method returns a void* instead of an NSImage. If you supply the correct attributes, you can tell the method to return you a CGImageRef directly.</p> <p>[attributes setObject:QTMovieFrameImageTypeCGImageRef forKey:QTMovieFrameImageType];</p> <p>At least that's the theory. I was trying to use QTMovieFrameImageTypeCVOpenGLTextureRef for my own purposes, but I keep getting errors when I call this (Error Domain=NSOSStatusErrorDomain Code=-50 "Operation could not be completed. (OSStatus error -50.)" (error in user parameter list)</p> <p>Using QTMovieFrameImageTypeCGImageRef didn't return an error for me though so I bet it will work for this case.</p> Funny, I was just going over the QTMovie frameImageAtTime:withAttributes:error: API last night and I stumbled upon this by this without looking for it.

Instead of converting from NSImage to CGImageRef, this withAttributes: version of the method returns a void* instead of an NSImage. If you supply the correct attributes, you can tell the method to return you a CGImageRef directly.

[attributes setObject:QTMovieFrameImageTypeCGImageRef forKey:QTMovieFrameImageType];

At least that’s the theory. I was trying to use QTMovieFrameImageTypeCVOpenGLTextureRef for my own purposes, but I keep getting errors when I call this (Error Domain=NSOSStatusErrorDomain Code=-50 “Operation could not be completed. (OSStatus error -50.)” (error in user parameter list)

Using QTMovieFrameImageTypeCGImageRef didn’t return an error for me though so I bet it will work for this case.

]]> By: Matt Long http://www.cimgf.com/2008/03/05/core-animation-tutorial-qtmovielayer-and-image-animation/comment-page-1/#comment-54 Matt Long Thu, 13 Mar 2008 01:41:14 +0000 http://www.cimgf.com/2008/03/05/core-animation-tutorial-qtmovielayer-and-image-animation/#comment-54 <p>These look like linker errors. Are you building in Debug or Release? It looks like your missing a framework Maybe QTKit?</p> These look like linker errors. Are you building in Debug or Release? It looks like your missing a framework Maybe QTKit?

]]> By: Luke http://www.cimgf.com/2008/03/05/core-animation-tutorial-qtmovielayer-and-image-animation/comment-page-1/#comment-53 Luke Thu, 13 Mar 2008 01:16:15 +0000 http://www.cimgf.com/2008/03/05/core-animation-tutorial-qtmovielayer-and-image-animation/#comment-53 <p>Hello there. When I download your demo and try to compile it, I get these three errors.</p> <p>"<em>QTMovieFrameImageTypeNSImage", referenced from: _QTMovieFrameImageTypeNSImage$non_lazy_ptr in ImageGrabber.o ".objc_class_name_QTMovieLayer", referenced from: literal-pointer@</em>_OBJC@__cls_refs@QTMovieLayer in AppDelegate.o "_QTMovieFrameImageType", referenced from: _QTMovieFrameImageType$non_lazy_ptr in ImageGrabber.o</p> <p>Can you give me any pointers as to where this errors are coming from? Thanks.</p> Hello there. When I download your demo and try to compile it, I get these three errors.

“QTMovieFrameImageTypeNSImage”, referenced from: _QTMovieFrameImageTypeNSImage$non_lazy_ptr in ImageGrabber.o “.objc_class_name_QTMovieLayer”, referenced from: literal-pointer@_OBJC@__cls_refs@QTMovieLayer in AppDelegate.o “_QTMovieFrameImageType”, referenced from: _QTMovieFrameImageType$non_lazy_ptr in ImageGrabber.o

Can you give me any pointers as to where this errors are coming from? Thanks.

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