HLS元数据ID3标记无效

Question

我在TableView中有一个音频URL列表,所以每次我点击didSelectRowAt这个方法上的每个单元格都会被调用

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    // Prepare Audio URL
    let audioUrl = URL(string: (channelSelected.audioUrl?.addingPercentEncoding(withAllowedCharacters: .urlFragmentAllowed))!)
    let playerItem = AVPlayerItem(url: audioUrl!)
    playerItem.addObserver(self, forKeyPath: "timedMetadata", options: .new, context: nil)
    player = AVPlayer(playerItem: playerItem)
    playerViewController = AVPlayerViewController()
    playerViewController.player = player
    present(playerViewController, animated: true, completion: {
        self.playerViewController.player?.play()
    })
}

基于教程,我实现了观察值监听器

override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
    print("keypath = \(keyPath!)")
    let avPlayerItem: AVPlayerItem = object as! AVPlayerItem
    if let timedMetadata = avPlayerItem.timedMetadata {
        print("Timed metadata = \(timedMetadata)")
    } else {
        print("Timed metadata nil")
    }
}

问题是timedMetadata总是零.帮助将不胜感激.

Answer 1

您的代码工作正常,此问题的原因是由服务器端的问题引起的.

您可以使用此工具mp3tag编辑音频文件 - 添加元数据标签并将其上传到服务器.

例如,您可以尝试这些音频包含的元数据标签:

http://ice1.somafm.com/groovesalad-128-mp3

https://developer.jwplayer.com/jw-player/demos/basic/audio-metadata/assets/index.m3u8

要确认,上述文件应该可以正常使用您的代码.