在AVPlayer上播放playerItem时获得playerasync_runAsynchronousCommandOnQueue

Question

我有以下尝试在AVPlayer上播放playerItem

$('#editPost').click(function() { //Button used to edit posts
    $('#editablePost').val($('#post').html()); //Textarea gets the post html
    $('#editablePost').show(); //The textarea is hidden until needed
    $('#post').hide(); //Hides original post
    $('#editablePost').focus(); //Focuses on the textarea
});

$('#savePost').click(function() { //Button used to save posts
    $('#post').html($('#editablePost').val()); //Post gets the value of textarea
    $('#editablePost').hide(); //Hides the textarea
    $('#post').show(); //Shows post with new text in it
    // Code below is what I use to send the information to the database and update
    $detail = $('#post').text();
    $edit = $('#editPostTime').text();
    $id = $('#questionId').text();
    $.ajax({
        url: 'editPost.php',
        type: 'post',
        data: {detail: $detail, edit: $edit, id: $id},
        datatype: 'html',
        success: function() {
            <?php
            date_default_timezone_set('Europe/London');
            $datetime = date("d/m/y H:i"); // create date and time
            ?>
            $('#editPostTime').text('Edited: <?php echo $datetime; ?>'); //Updates on page when post was edited
    }});
});

从控制台，即使视频可以正确播放，我也总是会出现以下错误

 let avAsset = AVAsset(url: url)
 let playerItem = AVPlayerItem(asset: avAsset)
 let avPlayer = AVPlayer()
 let playerLayer = AVPlayerLayer(player: avPlayer)
 playerLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill
 avPlayer.replaceCurrentItem(with: playerItem)
 avPlayer.seek(to: kCMTimeZero)
 avPlayer.play()

我不确定是否因为使用网址从AWS S3加载了AVAsset，所以我们非常感谢