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Youtube API - SeekTo Sometimes Doesn't Work

I am trying to get users to search for specific videos using YouTube using the following function:

    function setCurrentTime(slideNum) {
    var object = <?php echo json_encode($matches); ?>;
    if ('seekTo' in player.trackingVideoId){
        var seekTime = object[0][slideNum];
        player.trackingVideoId.seekTo(HHmmssToSeconds(seekTime));
    }
}

Where

var object = [["00:00:00","00:01:07"],["00","00"],["00","01"],["00","07"]];

player.trackingVideoId = new YT.Player('trackingVideoId');

<iframe id="trackingVideoId" type="text/html" width="340" height="210" src="https://www.youtube.com/embed/D77wXvwChtU?enablejsapi=1" frameborder="0"></iframe>

<input type="button" value="Seek" onclick="setCurrentTime(1)">

It works fine and sometimes does not work, and the following error appears (in firefox consol):

TypeError: invalid 'in' operand player.trackingVideoId

if ('seekTo' in player.trackingVideoId){

and when commenting on the conditions if ('seekTo' in player.trackingVideoId){

The following error will appear

Uncaught TypeError: Cannot read property 'seekTo' of undefined

update:

I initialized it - as in your link - to onYouTubeIframeAPIReady (). However, I placed setCurrentTime (slideNum) outside the onYouTubeIframeAPIReady () function, I tried to put it inside, there is another error that setCurrentTime is not defined.

I try to find a specific time when the user clicks a button

<input type="button" value="Seek" onclick="setCurrentTime(0)">

You can try @ http://ilstream.com/video_slides/video_slides.php

+4
1

, YouTube Player.
YT.Player onYouTubeIframeAPIReady.
(, "console.dir(player.trackingVideoId)" )

, .
https://developers.google.com/youtube/iframe_api_reference#Getting_Started

Update:
.
, (Windows7/Chrome 37.0.2062.124 ).

<!DOCTYPE html>
<html>
  <body>
    <div id="player"></div>
    <input type="button" value="Seek0" onclick="setCurrentTime(0)" />
    <input type="button" value="Seek1" onclick="setCurrentTime(1)" />
    <script>
      var tag = document.createElement('script');
      tag.src = "https://www.youtube.com/iframe_api";
      var firstScriptTag = document.getElementsByTagName('script')[0];
      firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
      var player;
      function onYouTubeIframeAPIReady() {
        player = new YT.Player('player', {
          height: '210',
          width: '340',
          videoId: 'D77wXvwChtU',
        });
      }
      function setCurrentTime(slideNum) {
        var object = [ 60, 120 ];
        player.seekTo(object[slideNum]);
      }
    </script>
  </body>
</html>
+5

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