[英]HTML5 Video: canPlayType() is not working in safari
我尝试了以下在developer.apple.com上编写的代码,但抛出错误:
TypeError:“未定义”不是函数(评估“ myVideo.canPlayType(myTypes [i])”)
<!doctype html>
<html>
<head>
<title>JavaScript Fallback</title>
<script type="text/javascript">
function checkPlaylist() {
var playAny = 0;
myTypes = new Array ("video/mp4","video/ogg","video/divx");
var nonePlayable = "Your browser cannot play these movie types."
var myVideo = document.getElementsByTagName('video')[0];
for (var i = 0, len = myTypes.length; i < len; x++) {
var canPlay = myVideo.canPlayType(myTypes[i]);
if ((canPlay == "maybe") || (canPlay == "probably"))
playAny = 1;
}
if (playAny == 0)
document.getElementById("video-player").innerHTML = nonePlayable;
}
</script>
</head>
<body onload="checkPlaylist()" >
<div id="video-player" align=center>
<video controls height="200" width="400">
<source src="myMovie.m4v" type="video/mp4">
<source src="myMovie.oga" type="video/ogg">
<source src="myMovie.dvx" type="video/divx">
</video>
</div>
</body>
</html>
使用以下脚本在Safari浏览器中检查myTypes数组参数:
<!DOCTYPE html>
<html>
<body>
<p>Can my browser play DIVX videos? <span>
<button onclick="supportType(event,'video/divx','H.264')" type="button">Test</button>
</span></p>
<p>Can my browser play MP4 videos? <span>
<button onclick="supportType(event,'video/mp4','avc1.42E01E, mp4a.40.2')" type="button">Test</button>
</span></p>
<p>Can my browser play OGG videos? <span>
<button onclick="supportType(event,'video/ogg','theora, vorbis')" type="button">Test</button>
</span></p>
<script>
function supportType(e,vidType,codType) {
var vid = document.createElement('video');
isSupp = vid.canPlayType(vidType+';codecs="'+codType+'"');
if (isSupp == "") {
isSupp = "No";
}
e.target.parentNode.innerHTML = "Answer: " + isSupp;
}
</script>
</body>
</html>
您是否正在使用Windows的Safari? 如果是这样,那可能会失败。 Apple不再支持Windows的Safari。
你也有var i = 0, len = myTypes.length; i < len; x++
var i = 0, len = myTypes.length; i < len; x++
var i = 0, len = myTypes.length; i < len; x++
。 最后一个x
应该是i
。
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