怎么用JavaScript实现网页视频添加水印
这篇“怎么用JavaScript实现网页视频添加水印”文章的知识点大部分人都不太理解，所以小编给大家总结了以下内容，内容详细，步骤清晰，具有一定的借鉴价值，希望大家阅读完这篇文章能有所收获，下面我们一起来看看这篇“怎么用JavaScript实现网页视频添加水印”文章吧。
原理
通过html的页面布局，在video播放器层面，通过js控制dom,插入文本水印代码。
代码示例
index.html
<!DOCTYPE html><html><head> <meta name="renderer" content="webkit" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="X-UApatible" content="IE=edge,chrome=1"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>html5视频水印</title> <script src="https://jq22/jquery/jquery-1.10.2.js"></script> <link rel="stylesheet" type="text/css" href="css/waterMarkVideo.css" rel="external nofollow" ></head><body> <div id="container"> <div > <div class="watermark video-watermark-multiple video-watermark-item"> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> <div class="noselect"><span class="span"><span></div> </div> <video width="640px" height="360px"> <source src="https://blz-videos.nosdn.127.net/1/OverWatch/AnimatedShots/Overwatch_TheatricalTeaser_WeAreOverwatch_z.mp4" type="video/mp4"/> </video> <div class="pos"> <img src=" img/i-play.png" width="40px" id="playBtn" /> <div > <progress value="0" id="progress"></progress> </div> <div class="timebox"> <span id="time1"> 00:00:00 </span>/ <span id="time2"> 00:00:00 </span> </div> <img src="img/i-fs.png" width="35px" id="full"/> </div> </div> </div> <script type="text/javascript"> $(".span").html("water-mark"); var video = document.querySelector("video"); var playBtn = document.getElementById("playBtn"); playBtn.onclick = function(){ if(video.paused){ video.play(); playBtn.src = "img/i-pause.png"; }else{ video.pause(); playBtn.src = "img/i-play.png"; } } var full = document.getElementById("full"); var container = document.getElementById("container"); var i = 1;//定义一个变量，用于记录是否为全屏状态 full.onclick = function(){ i++;//对2取余，为0则全屏，否则关闭全屏 if(i%2==0){//点击开启全屏 if(container.requestFullScreen){ container.requestFullScreen() }else if(container.webkitRequestFullScreen){ container.webkitRequestFullScreen()//谷歌 }else if(container.mozRequestFullScreen){ container.mozRequestFullScreen()//火狐 }else if(container.msRequestFullscreen){ container.msRequestFullscreen()//ie } $('video').css({"width":"100%","height":"100%"}); $(".pos").css("width","100%"); full.src = "img/i-exitfs.png"; }else{//关闭全屏 if(document.cancelFullscreen){ document.cancelFullscreen(); }else if(document.webkitCancelFullScreen){ document.webkitCancelFullScreen(); }else if(document.mozCancelFullScreen){ document.mozCancelFullScreen(); }else if(document.msExitFullscreen){ document.msExitFullscreen(); } $('video').css({"width":"640px","height":"360px"}); $(".pos").css("width","640px"); full.src = "img/i-fs.png"; } } function number1(s){ if(s<10){ s="0"+s }else{ s=""+s } return s; } var time1 = document.getElementById("time1"); var time2 = document.getElementById("time2"); var t1; //视频获取时间单位为秒，要对它进行一些数据的处理 video.oncanplay = function(){ t1 = video.duration;//获取视频总时长 var h = parseInt(t1/3600); var m = parseInt(t1%3600/60); var s = parseInt(t1%60); time2.innerHTML = number1(h) + ":"+ number1(m) + ":" + number1(s);//值显示在span标签中 } //获取当前视频播放的时间 video.ontimeupdate = function(){ var t2 = video.currentTime; var h = parseInt(t2/3600); var m = parseInt(t2%3600/60); var s = parseInt(t2%60); time1.innerHTML = number1(h) + ":"+ number1(m) + ":" + number1(s); progress.max = t2; progress.value = t2/t1*progress.max; } video.onended = function(){ progress.value = 0; time1.innerHTML = "00"+":"+"00"+":"+"00";//播放结束时时间清0; playBtn.src = "img/i-play.png";//播放结束时按钮恢复 } progress.onclick = function(e){ //获取当前位置距离父级最左边的距离 //left = progress.offsetLeft; //获取鼠标距离屏幕最左边的距离 //e.clientX //获取鼠标距离当前元素最左边的距离 var left = e.offsetX; console.log(left); console.log(t1); video.currentTime = left/360*t1; }</script></body></html>核心代码
$(".span").html("water-mark");"water-mark"字段添加要打的水印内容。也可以动态添加水印内容。
样式waterMarkVideo.css代码
body,div,img{ margin: 0; padding: 0; border: 0;}#container{ width: 640px; border: 1px solid pink;}.pos{ width: 640px; height: 60px; background: rgba(0,0,0,0.5); margin-top: -63px; position: relative; }#playBtn{ position:relative; top: 10px; left: 20px; cursor: pointer;}#progress{ height: 12px; width: 100%; position: relative; top: -27px; cursor: pointer; }.timebox{ position:absolute; top: 20px; right: 80px; cursor: pointer; color: white;}#full{ position:absolute; top: 12px; right: 20px; cursor: pointer;}.video-watermark-item { left: 15%; top: 10%; font-size: 20px; color: rgba(240,240,240,0.3); font-family: 方正黑体; -o-transform: translate(-15%, -50%) rotate(-35deg); -webkit-transform: translate(-15%, -50%) rotate(-35deg); -moz-transform: translate(-15%, -50%) rotate(-35deg); -ms-transform: translate(-15%, -50%) rotate(-35deg); transform: translate(-15%, -50%) rotate(-35deg); position: absolute; overflow: hidden;}.noselect { display: inline-block; padding: 100px;}以上就是关于“怎么用JavaScript实现网页视频添加水印”这篇文章的内容，相信大家都有了一定的了解，希望小编分享的内容对大家有帮助，若想了解更多相关的知识内容，请关注主机评测网行业资讯频道。
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