Snow Leopard: 64-bit replacement for QuickTime API

Question

I'm migrating my movie player to 64-bit.

At present it is capable of decoding movies with both QuickTime API and FFmpeg.

To decode with QuickTime API I create a QTOpenGLTextureContext providing a QTVisualContextRef and then I obtain a decoded frame of type CVOpenGLTextureRef using QTVisualContextCopyImageForTime.

Now I want to make my app 64-bit and therefore I can't use QuickTime API anymore because this functions aren't 64-bit.

So I passed to QTKit and I started to decode frames using the method frameImageAtTime:withAttributes:error: which gives a decoded frame in various image format. At present I made it to return a CVOpenGLTextureRef in order to use all the actual structure of my display routine. The method actually works and I can get rid of the 32-bit QTVisualContextRef.

The problem is that this method is tremendously SLOW!! It's not able to make a realtime playback of an Apple h264 movie trailer. It requires 4 times the time required by the old method to output the CVOpenGLTextureRef!

I tried all of the other image type that frameImageAtTime:withAttributes:error: can handle in output, without success..it's even slower sometimes..

The given attributes are:

[_imageAttr setObject:QTMovieFrameImageTypeCVOpenGLTextureRef forKey:QTMovieFrameImageType];
[_imageAttr setObject:[NSValue valueWithPointer:[openGLContext CGLContextObj]] forKey:QTMovieFrameImageOpenGLContext];
[_imageAttr setObject:[NSValue valueWithPointer:[openGLPixelFormat CGLPixelFormatObj]] forKey:QTMovieFrameImagePixelFormat];
[_imageAttr setObject:[NSNumber numberWithBool:YES] forKey:QTMovieFrameImageSessionMode];
[_imageAttr setObject:[NSNumber numberWithBool:YES] forKey:QTMovieFrameImageHighQuality];
[_imageAttr setObject:[NSNumber numberWithBool:YES] forKey:QTMovieFrameImageDeinterlaceFields];

Which is the real replacement for the QuickTime API is 64-bit? Is there any?

I can't change the main structure of the media player so I must obtain a CVOpenGLTextureRef or CVPixelBufferRef or CIImage*

I hope you can help me!

Answer 1

The replacement of QuickTime is AVFoundation. It may not contain all you need at the moment, but this is the future.