问题描述

我正在使用 jw 播放器播放 youtube 视频，但我需要视频以高清 (720p) 开始播放，我使用以下代码:

I'm using jw player to play youtube videos, but i need for the video to start playing in hd ( 720p ) i use the following code:

<div id="player">
<script>
 jwplayer("player").setup({
        file: "http://www.youtube.com/watch?v=o8UCI7r1Aqw",
        height: "720",
        width: "1280"
    });
</script>
</div>
<script>
jwplayer('player').onPlay(function() {
jwplayer().setPlaybackQuality('hd720');
});
</script>

但我收到以下错误

回调事件处理程序时出错

There was an error calling back an event handler

这里是我设置的测试播放器.

Here is the test player that i set up.

推荐答案

setPlaybackQuality 不是有效的 API 调用 - http://www.longtailvideo.com/support/jw-player/28851/javascript-api-reference

setPlaybackQuality is not a valid API call - http://www.longtailvideo.com/support/jw-player/28851/javascript-api-reference

以下是有效质量 API 调用的列表:

Here is a list of valid quality API calls:

Quality

These API calls are used to listen to or update the video quality if multiple quality levels of a video are provided.

getQualityLevels()
    Returns an array with quality levels from the player. Each level is an object that contains a label property. 
getCurrentQuality()
    Returns the index of the currently active quality level. 

setCurrentQuality(index)
    Change the quality level to the provided index. The index must be within the list provided by getQualityLevels. 

onQualityLevels(callback)
    Fired when the list of available quality levels is updated. Happens e.g. shortly after a playlist item starts playing. Event attributes:

        levels (Array): the full array with new quality levels. 

onQualityChange (callback)
    Fired when the active quality level is changed. Happens in respons to e.g. a user clicking the controlbar quality menu or a script calling setCurrentQuality. Event attributes:

        currentQuality (Number): index of the new quality level in the getQualityLevels() array. 

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