Swift/iOS: Capture only the previous 10 seconds of a video recording

Question

I want to constantly record a video stream using my iOS device, but given some action (Double tap screen etc.) I want to capture the 10 seconds prior to me invoking the action.

I am not sure how to do this without storing the whole video stream and then taking just the last 10 seconds of video.

Answer 1

Try following code may be it's work for you

   let session = AVCaptureSession()
   let movieOutput = AVCaptureMovieFileOutput()

    movieOutput.maxRecordedDuration = CMTime(seconds: 10, preferredTimescale: 1)
    if session.canAddOutput(movieOutput) {
        session.addOutput(movieOutput)
    }