Creating CMSampleBufferRef from the data

Question

I am trying to create a CMSampleBuffer Ref from the data and trying to feed it to AVAssetWriter. But asset writer is failing to create the movie from the data. Following is the

Answer 1

You should look into AVAssetWriterInputPixelBufferAdaptor - it accepts CVPixelBuffers so you don't need to convert the CVPixelBuffer in a CMSampleBuffer.

here is a link to a thread about it on the apple dev forum -> https://devforums.apple.com/thread/70258?tstart=0

Also - any chance you could post your project file or sample code of the capture movie working -- I am using the default CMSampleBuffer from the AVFoundation data output callback method - but when I save it to camera roll it is all black except the last 5 frames which I have to manually scrub to :S

any help in regards to my issue would be greatly appreciated.

Cheers,

Michael

Answer 2

    The operation couldn’t be completed. (AVFoundationErrorDomain error -11800.)

For this error, it always occur when timingInfo is invalid. it need set it to valid values with PTS and Duration.

CMSampleTimingInfo timingInfo = kCMTimingInfoInvalid;
timingInfo.presentationTimeStamp = pts; 
timingInfo.duration = duration;