video_chewie/example/lib/utils.dart

String formatDuration(Duration position) {
  final ms = position.inMilliseconds;

  int seconds = ms ~/ 1000;
  final int hours = seconds ~/ 3600;
  seconds = seconds % 3600;
  var minutes = seconds ~/ 60;
  seconds = seconds % 60;

  final hoursString = hours > 10 ? '$hours' : hours == 0 ? '00' : '0$hours';

  final minutesString =
      minutes > 10 ? '$minutes' : minutes == 0 ? '00' : '0$minutes';

  final secondsString =
      seconds > 10 ? '$seconds' : seconds == 0 ? '00' : '0$seconds';

  final formattedTime = '${hoursString == '00' ? '' : hoursString +
      ':'}$minutesString:$secondsString';

  return formattedTime;
}