AVFoundation - Retiming CMSampleBufferRef Video Output

Question

First time asking a question here. I\'m hoping the post is clear and sample code is formatted correctly.

I\'m experimenting with AVFoundation and time lapse photography.

Answer 1

OK, I found the bug in my first post.

When using

myStatus = CMSampleBufferCreateCopyWithNewTiming(kCFAllocatorDefault,
                                                 sampleBuffer,
                                                 1,
                                                 &sampleTimingInfo, 
                                                 &newSampleBuffer);

you need to balance that with a CFRelease(newSampleBuffer);

The same idea holds true when using a CVPixelBufferRef with a piexBufferPool of an AVAssetWriterInputPixelBufferAdaptor instance. You would use CVPixelBufferRelease(yourCVPixelBufferRef); after calling the appendPixelBuffer: withPresentationTime: method.

Hope this is helpful to someone else.