is it possible to read metadata using HTTP live streaming in the iPhone SDK

Question

When playing a live stream using the HTTP Live Streaming method, is it possible read the current metadata (eg. Title and Artist)? This is for an iPhone radio app.

Answer 1

Swift solution. This is a sample of simple streaming audio player. You can read metadata in the method of delegate AVPlayerItemMetadataOutputPushDelegate.

import UIKit
import AVFoundation

class PlayerViewController: UIViewController {
    var player = AVPlayer()

    override func viewDidLoad() {
        super.viewDidLoad()
        configurePlayer()
        player.play()
    }

    private func configurePlayer() {
        guard let url = URL(string: "Your stream URL") else { return }
        let asset = AVAsset(url: url)
        let playerItem = AVPlayerItem(asset: asset)
        let metadataOutput = AVPlayerItemMetadataOutput(identifiers: nil)
        metadataOutput.setDelegate(self, queue: DispatchQueue.main)
        playerItem.add(metadataOutput)
        player = AVPlayer(playerItem: playerItem)
    }
}

extension PlayerViewController: AVPlayerItemMetadataOutputPushDelegate {
    func metadataOutput(_ output: AVPlayerItemMetadataOutput, didOutputTimedMetadataGroups groups: [AVTimedMetadataGroup], from track: AVPlayerItemTrack?) {
        let item = groups.first?.items.first
        item?.value(forKeyPath: "value")
        print(item!.value(forKeyPath: "value")!)
    }
}