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使用jQuery控制HTML5视频播放/暂停

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May 24, 2018 pm 04:18 PM

html5

我尝试用jQuery控制HTML5视频，两个视频分别在两个tab中，我希望点中tab后，该tab里的视频可以立即播放，而另外tab里的视频能够停止。

我的代码是这样的：

$(&#39;#playMovie1&#39;).click(function(){
$(&#39;#movie1&#39;).play();
});

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但发现这样不行，而用以下的js是可以的：

document.getElementById(&#39;movie1&#39;).play();

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解决方法：

play并不是jQuery的函数，而是DOM元素的函数，所以我们需要通过DOM来调用play，代码如下：

$(&#39;#videoId&#39;).get(0).play();

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最简单的方法实现Play和Pause:

$(&#39;video&#39;).trigger(&#39;play&#39;);
$(&#39;video&#39;).trigger(&#39;pause&#39;);

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点击视频就能播放和暂停

$("video").trigger("play");//for auto play
$("video").addClass(&#39;pause&#39;);//for check pause or play add a class
$(&#39;video&#39;).click(function() {
if ($(this).hasClass(&#39;pause&#39;)) {
$("video").trigger("play");
$(this).removeClass(&#39;pause&#39;);
$(this).addClass(&#39;play&#39;);
} else {
$("video").trigger("pause");
$(this).removeClass(&#39;play&#39;);
$(this).addClass(&#39;pause&#39;);
}
})

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静音和取消静音

$(&#39;body&#39;).find("video").attr(&#39;id&#39;, &#39;video&#39;)
var myVid = document.getElementById("video");
$(&#39;.sound-icon&#39;).click(function() {
//here "sound-icon" is a anchor class. 
var sta = myVid.muted;
if (sta == true) {
myVid.muted = false;
} else {
myVid.muted = true;
}
})

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HTML 5中播放视频的方法：

Try this page in Safari 4! Or you can 
download the video instead.

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自动播放：

<video src="abc.mov" autoplay>
</video>

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使用poster在视频无法加载时显示图片：

<video width="640" height="360" src="http://www.youtube.com/demo/google_main.mp" autobuffer controls poster="whale.png">
<p>Try this page in Safari 4! Or you can <a href="http://www.youtube.com/demo/google_main.mp4">download the video</a> instead.</p>
</video>

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一个比较简洁的例子：

<script type="text/javascript">
function vidplay() {
var video = document.getElementById("Video1");
var button = document.getElementById("play");
if (video.paused) {
video.play();
button.textContent = "||";
} else {
video.pause();
button.textContent = ">";
}
}
function restart() {
var video = document.getElementById("Video1");
video.currentTime = 0;
}
function skip(value) {
var video = document.getElementById("Video1");
video.currentTime += value;
} 
</script>
</head>
<body>
<video id="Video1" >
// Replace these with your own video files. 
<source src="demo.mp4" type="video/mp4" />
<source src="demo.ogv" type="video/ogg" />
HTML5 Video is required for this example. 
<a href="demo.mp4">Download the video</a> file. 
</video>
<p id="buttonbar">
<button id="restart" onclick="restart();">[]</button> 
<button id="rew" onclick="skip(-10)"><<</button>
<button id="play" onclick="vidplay()">></button>
<button id="fastFwd" onclick="skip(10)">>></button>
</p>

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下面是一个比较完整的例子：

<html >
<head>
<title>Full player example</title>
<!-- Uncomment the following meta tag if you have issues rendering this page on an intranet or local site. --> 
<!-- <meta http-equiv="X-UA-Compatible" content="IE=edge"/> -->
<script type="text/javascript">
function init() { // Master function, encapsulates all functions
var video = document.getElementById("Video1"); 
if (video.canPlayType) { // tests that we have HTML5 video support
// if successful, display buttons and set up events
document.getElementById("buttonbar").style.display = "block"; 
document.getElementById("inputField").style.display = "block";
// helper functions
// play video
function vidplay(evt) {
if (video.src == "") { // inital source load
getVideo();
}
button = evt.target; // get the button id to swap the text based on the state 
if (video.paused) { // play the file, and display pause symbol
video.play();
button.textContent = "||";
} else { // pause the file, and display play symbol 
video.pause();
button.textContent = ">";
}
}
// load video file from input field
function getVideo() {
var fileURL = document.getElementById("videoFile").value; // get input field 
if (fileURL != "") {
video.src = fileURL;
video.load(); // if HTML source element is used
document.getElementById("play").click(); // start play
} else {
errMessage("Enter a valid video URL"); // fail silently
}
}
 
// button helper functions 
// skip forward, backward, or restart
function setTime(tValue) {
// if no video is loaded, this throws an exception 
try {
if (tValue == 0) {
video.currentTime = tValue;
}
else {
video.currentTime += tValue;
}

} catch (err) {
// errMessage(err) // show exception
errMessage("Video content might not be loaded");
}
}
// display an error message 
function errMessage(msg) {
// displays an error message for 5 seconds then clears it
document.getElementById("errorMsg").textContent = msg;
setTimeout("document.getElementById(&#39;errorMsg&#39;).textContent=&#39;&#39;", 5000);
}
// change volume based on incoming value 
function setVol(value) {
var vol = video.volume;
vol += value;
// test for range 0 - 1 to avoid exceptions
if (vol >= 0 && vol <= 1) {
// if valid value, use it
video.volume = vol;
} else {
// otherwise substitute a 0 or 1
video.volume = (vol < 0) ? 0 : 1; 
}
}
// button events 
// Play
document.getElementById("play").addEventListener("click", vidplay, false);
// Restart
document.getElementById("restart").addEventListener("click", function () {
setTime(0);
}, false);
// Skip backward 10 seconds
document.getElementById("rew").addEventListener("click", function () {
setTime(-10);
}, false);
// Skip forward 10 seconds
document.getElementById("fwd").addEventListener("click", function () {
setTime(10);
}, false);
// set src == latest video file URL
document.getElementById("loadVideo").addEventListener("click", getVideo, false);
// fail with message 
video.addEventListener("error", function (err) {
errMessage(err);
}, true);
// volume buttons
document.getElementById("volDn").addEventListener("click", function () {
setVol(-.1); // down by 10%
}, false);
document.getElementById("volUp").addEventListener("click", function () {
setVol(.1); // up by 10%
}, false);
// playback speed buttons
document.getElementById("slower").addEventListener("click", function () {
video.playbackRate -= .25;
}, false);
document.getElementById("faster").addEventListener("click", function () {
video.playbackRate += .25;
}, false);
document.getElementById("normal").addEventListener("click", function () {
video.playbackRate = 1;
}, false);
document.getElementById("mute").addEventListener("click", function (evt) {
if (video.muted) {
video.muted = false;
evt.target.innerHTML = "<img alt=&#39;volume on button&#39; src=&#39;vol2.png&#39; />"
} else {
video.muted = true;
evt.target.innerHTML = "<img alt=&#39;volume off button&#39; src=&#39;mute2.png&#39; />"
}
}, false);
} // end of runtime
}// end of master 
</script>

</head>
<body onload="init();" > 

<video id="Video1" controls style="border: 1px solid blue;" height="240" width="320" title="video element"> 
HTML5 Video is required for this example
</video>

<p id="buttonbar" style="display: none;")>
<button id="restart" title="Restart button">[]</button> 
<button id="slower" title="Slower playback button">-</button> 
<button id="rew" title="Rewind button" ><<</button>
<button id="play" title="Play button">></button>
<button id="fwd" title="Forward button" >>></button>
<button id="faster" title="Faster playback button">+</button>
<button id="Button2" title="Mute button" ><img alt="Volume on button" src="vol2.png" /></button> 
<br />
<label>Playback </label>
<label>Reset playback rate: </label><button id="normal" title="Reset playback rate button">=</button> 

<label> Volume </label>
<button id="volDn" title="Volume down button">-</button>
<button id="volUp" title="Volume up button">+</button>
<button id="mute" title="Mute button" ><img alt="Volume on button" src="vol2.png" /></button> 
</p> 
<br/> 
<p id= "inputField" style="display:none;" >
<label>Type or paste a video URL: <br/>
<input type="text" id="videoFile" style="width: 300px;" title="video file input field" value="http://ie.microsoft.com/testdrive/ieblog/2011/nov/pp4_blog_demo.mp4" /> 
<button id="loadVideo" title="Load video button" >Load</button>
</label>
</p>
<p title="Error message area" id="errorMsg" style="color:Red;"></p> 
</body>
</html>

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