iosswiftavplayercmtime

periodicTimeObserver for duration countdown in AVPlayer with Swift

I have a time observer for AVPlayer that works great. Im trying to get it to countdown from the duration of the audio 0.

It works and does count down now I'm just having some trouble with formatting.

if you see the picture below you'll see what i mean. It goes from whole minutes:seconds 3:00, to weird numbers 3:-1 ect.

enter image description here enter image description here

any ideas what I've done wrong?

heres the code for the timer:

let interval = CMTime(value: 1, timescale: 1)
self.audioPlayer?.addPeriodicTimeObserver(forInterval: interval, queue: DispatchQueue.main, using: { (progressTime) in

let secondsProgress = CMTimeGetSeconds(progressTime)

    let secondsStringProgress = String(format: "%02d", Int((secondsProgress.truncatingRemainder(dividingBy: 60))))
    let minuitesStringProgress = String(format: "%02d", Int(secondsProgress) / 60)
    //self.countDownLabel.text = "\(minuitesStringProgress):\(secondsStringProgress)"

    if let duration = self.audioPlayer?.currentItem!.asset.duration {

        let secondsDuration = CMTimeGetSeconds(duration)

            let secondsStringDuration = String(format: "%02d", Int((secondsDuration.truncatingRemainder(dividingBy: 60))))
            let minuitesStringDuration = String(format: "%02d", Int(secondsDuration) / 60)

                let secondsString = String(format: "%02d", Int(secondsStringDuration)! - Int(secondsStringProgress)!)
                let minuitesString = String(format: "%02d", Int(minuitesStringDuration)! - Int(minuitesStringProgress)!)

            self.countDownLabel.isHidden = false
            self.countDownLabel.text = "\(minuitesString):\(secondsString)"

        self.horizontalSlider.value = Float(secondsProgress / secondsDuration)
        self.circleSlider.value = Float(secondsProgress / secondsDuration)

    }
})
Solution

  • I use this function to display formatted date

      func getFormatedTime(FromTime timeDuration:Int) -> String {

    let minutes = Int(timeDuration) / 60 % 60
    let seconds = Int(timeDuration) % 60
    let strDuration = String(format:"%02d:%02d", minutes, seconds)
    return strDuration
  }

    use like this

            let strDuration = self.getFormatedTime(FromTime: recordingDuration)

    or directly like this in addPeriodicTimeObserver method

          recordingDuration = Float(CMTimeGetSeconds((self.playerItem?.asset.duration)!))-Float(CMTimeGetSeconds((self.playerItem?.currentTime())!))

    pass it to getFormatedTime set text of return value

    just two lines of code