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I’m programming an iPhone app which uses an AVAssetReader to read samples from an AVAssetTrack, I need to allocate some memory which depends on the number of samples in the AVAssetTrack, but for some reason totalSampleDataLength is returning 0.
Any ideas?
< warning – guess! >
Perhaps it’s something to do with the AVAsynchronousKeyValueLoading protocol – do you have to ask it to load the value for that key before it’s populated?