如何在swift / AVKIT中读取HLS流中的id3标签/其他元数据

import AVKit
import AVFoundation

let playerItem = AVPlayerItem(url: videoURL)
let asset = playerItem.asset

let metadataOutput = AVPlayerItemMetadataOutput(identifiers: nil)
playerItem.add(metadataOutput)

metadataOutput.setDelegate(self, queue: DispatchQueue.main)

extension YourViewController: AVPlayerItemMetadataOutputPushDelegate {
    func metadataOutput(_ output: AVPlayerItemMetadataOutput, didOutputTimedMetadataGroups groups: [AVTimedMetadataGroup], from track: AVPlayerItemTrack?) {
        for timedMetadataGroup in groups {
            for item in timedMetadataGroup.items {
                if let identifier = item.identifier, let value = item.value {
                    // 处理元数据
                    print("Identifier: \(identifier), Value: \(value)")
                }
            }
        }
    }
}

let player = AVPlayer(playerItem: playerItem)
let playerViewController = AVPlayerViewController()
playerViewController.player = player
present(playerViewController, animated: true) {
    player.play()
}