Get Crash about AVAssetReaderTrackOutput

[icefox57]

2 kind of crash

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '*** -[AVAssetReaderTrackOutput copyNextSampleBuffer] cannot copy next sample buffer before adding this output to an instance of AVAssetReader (using -addOutput:) and calling -startReading on that asset reader'

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '*** -[AVAssetReader startReading] cannot be called again after reading has already started'
terminating with uncaught exception of type NSException

[ThuTruongMinu]

Hi. I'm having the same issue. Have you found any solutions?

[nathan-ahn]

I believe it's an issue having to do with concurrency, and multiple calls to addAssetID sharing the same audioReader, videoReader, and assetWriter. I fixed this by moving those three variables into the top of addAssetID (and cleaning up all references to self. for each of them).