Create a CMSampleBuffer from a CVPixelBuffer

Question

I get a CVPixelBuffer from ARSessionDelegate:

func session(_ session: ARSession, didUpdate frame: ARFrame) {
    frame.capturedImage // CVPixelBufferRef
}


        

Answer 1

The sampleTiming mainly contains the presentationTimeStamp, You can easy create it by following codes:

let scale = CMTimeScale(NSEC_PER_SEC)
let pts = CMTime(value: CMTimeValue(frame.timestamp * Double(scale)),
                 timescale: scale)
var timingInfo = CMSampleTimingInfo(duration: kCMTimeInvalid,
                                    presentationTimeStamp: pts,
                                    decodeTimeStamp: kCMTimeInvalid)