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Detailed introduction to html5 multimedia

黄舟Original: 2017-03-15 16:12:212090browse

1) attribute of the video element:

autoplay - If present, this attribute will cause the browser to May start playing video immediately;

preload="none" - the video will not be loaded until the user starts playing it;

preload="metadata" - Only the metadata of the video can be loaded before the user starts playing;

preload="auto" --Request the browser to download the entire video as quickly as possible. The browser can ignore this request. This is the default behavior #；
loop——If exists, this attribute will let the browser play the video repeatedly;

poster——Specify the video data loaded Picture displayed when entering;

height

——Specify the height of the video;

width

——Specify the width of the video;

muted——If this attribute exists, the video will be muted starting from ;

src——Specify the video to be displayed;

1.1) source element: provide alternative video formats to the browser; src——Specify the video to be displayed;

type——Specify the MIME type of the file;

2) The attributes of the audio element are basically the same as those of the video element and will not be repeated;

3) Members of the HTMLMediaElement

object

autoplay——Get or set whether the autoplay attribute exists;

##canPlayType(7674b22ef33c73b930516fd6bc30b7a3)——Get whether the browser can play Prompts for specific MIME types;

currentSrc - Get the current source;

controls - Get or Set whether the controls attribute exists;

defaultMuted - Get or set whether the muted attribute initially exists;

loop - Get or set loop Whether the attribute exists;

muted - Gets or sets whether the muted attribute exists;

preload - Gets or sets the value of the preload attribute;

src——Get or set the value of the src attribute;

volume——Get or set the volume, ranging from 0.0 to 1.0;

3.1) Additional properties of the HTMLVideoElement object:

height - Gets or sets the value of the height attribute ;

width——Get or set the value of the width attribute;

videoHeight——Get the original height of the video;

videoWidth——Get the original width of the video;

poster——Get or set the value of the poster attribute;

##3.2) HTMLMediaElementPlayback members of the object:

##currentTime——Returns the current playback point of the media file;

duration——Returns the total duration of the media file;

ended——Returns true if the media file has finished playing;

pause()——Pauses media playback;

paused——Returns true if playback is paused, otherwise returns false;

play()——Start playback of media;

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>上海远地资产管理有限公司</title>
    <meta name="author" content="jason"/>
    <meta name="description" content="上海远地资产管理有限公司（简称：远地资产），是一家专业的互联网金融服务平台."/>
    <link rel="shortcut icon" href="images/favicon.ico" type="image/x-icon"/>
    <style type="text/css">
        table{
            border-collapse: collapse;
            border:thin solid black;
        }
        th,td{
            padding: 3px 4px;
        }
        body > *{
            float: left;
            margin: 2px;
        }
    </style>
</head>
<body>
    <video width="360" height="240" src="raw/timessquare.webm" autoplay controls preload="none" muted>

    </video>
    <video width="360" height="240" src="raw/timessquare.webm"  controls preload="none" muted>
        视频不能播放
    </video>
    <video width="360" height="240" src="raw/timessquare.webm"  controls preload="metadata" muted>
        视频不能播放
    </video>
    <video width="360" height="240" src="raw/timessquare.webm"  controls preload="none" poster="images/poster.png">
        视频不能播放
    </video>

    <video id="media" controls="controls" width="360" height="240">
        <source src="raw/timessquare.webm" type="video/webm"/>
        <source src="raw/timessquare.ogv" type="video/ogg"/>
        <source src="raw/timessquare.mp4" type="video/mp4"/>
        <embed src="http://player.youku.com/player.php/sid/XMTI3NjI2MzQ2MA==/v.swf"
               quality="high" width="360" height="240" align="middle" allowScriptAccess="always" allowFullScreen="true"
               mode="transparent" type="application/x-shockwave-flash">
        </embed>
    </video>
    <table id="info" border="1">
        <tr><th>Property</th><th>Value</th></tr>
    </table>
    <p>
        <button id="play">播放</button>
        <button id="pause">暂停</button>
    </p>
    <!--获取媒体元素的基本信息
    <script type="text/javascript">
        var mediaElem=document.getElementById("media");
        var tableElem=document.getElementById("info");
        var propertyNames=["autoplay","currentSrc","controls","loop","muted","preload","src","volume"];
        for(var i=0;i<propertyNames.length;i++){
            tableElem.innerHTML+="<tr><td>"+propertyNames[i]+"</td><td>"+mediaElem[propertyNames[i]]+"</td></tr>";
        }
    </script>
    -->
    <script type="text/javascript">
        var mediaElem=document.getElementById("media");
        var buttons=document.getElementsByTagName("button");
        for(var i=0;i<buttons.length;i++){
            buttons[i].onclick=handleButtonPress;
        }
        function handleButtonPress(e){
            switch (e.target.id){
                case &#39;play&#39;:
                    mediaElem.play();
                    break;
                case &#39;pause&#39;:
                    mediaElem.pause();
                    break;
            }
        }
    </script>

</body>
</html>

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