How to get duration (HH:MM:SS) from AVAudioPlayer

// How to get duration (HH:MM:SS) from AVAudioPlayer
AVAudioPlayer *audioPlayer =  [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL URLWithString:@"you-url-sreaming"] error:nil];
[audioPlayer prepareToPlay];
CMTime duration = [[[audioPlayer currentItem] asset] duration];
float seconds = CMTimeGetSeconds(duration);
NSLog("Duration : %@", [NSString stringWithFormat:@"%02d:%02d:%02d", (int)((int)(seconds)) / 3600, (int)((int)(seconds)) / 60, (int)((int)(seconds)) % 60]);