ysbcc.github.io/wow2.html at master · ysbcc/ysbcc.github.io · GitHub

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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
<meta name="viewport" content="width=device-width,minimum-scale=0.5,maximum-scale=5,user-scalable=yes,minimal-ui" />

<title>视频图像合成</title>
<head>
<style>
img {display:block;}
div {mergin:10px;}
</style>

<!-- <script src="http://libs.baidu.com/backbone/0.9.2/backbone.js"></script> -->
</head>
<body bgcolor="#999999">
	<h1 id="tit">视频图像合成</h1>
	<div id="mod_player" style="z-index:1;position:absolute">
		<video id="vv" width=300 height=500 controls="controls" xloop="loop" playsinline="true" webkit-playsinline="true" x5-video-player-type="h5"  data-playing-loadingad="0" preload="none" src="/images/huabanxie.mp4" style="z-index:1"></video>
	</div>

	<div style="margin-top: 10px;z-index:9;position:absolute">
        <canvas width=352 height=360 id="thecanvas" style="border: 5px #666666 solid;"></canvas>
    </div>
	<div style="margin:20px">
		<button id="stop">播放</button>
		<button id="saveImageBtn">截图</button>
		<button id="reset">查看源视频</button>
		<button id="myTurn">还原</button>


    </div>
	<div style="display:none;">
	<img src="/images/myhead.png" id='ahead' />
		<canvas width=352 height=360 id="shoot"></canvas>
	</div>
	<div id="saveImg">
	</div>

</body>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.js"></script>
<script>
	var $e = function (a){
		return "string"==typeof a ? document.getElementById(a) : a;
	}

	var canvas = $e("thecanvas");
	var ctx = canvas.getContext("2d");
	var filter = 1;

	function isMatch(r,g,b){
		var matchPoint = [15,226,93];//rgb
		var absR = matchPoint[0] - r;
		var absG = matchPoint[1] - g;
		var absB = matchPoint[2] - b;
		var dis = absR*absR+absG*absG+absB*absB;
		return dis < 900;
	}

	function checkPosition(imageData){
		var min_x = 9999,
			min_y = 9999,
			max_x = 0,
			max_y = 0;

        for (var y = 0; y < imageData.height; y++) {
			if (max_y && y > (max_y + 5)){
				break;
			}

            for (x = 0;x < imageData.width; x++) {
				if (max_x && x > (max_x + 5)){
					break;
				}

				var p = (y * imageData.width + x) * 4;
				//一个像素占四个字节，即 p 为当前指针的位置
                if (isMatch(imageData.data[p],
					imageData.data[p+1],
					imageData.data[p+2])){

					//match
					imageData.data[p+3]=0;
					if (x < min_x) min_x = x;
					if (y < min_y) min_y = y;
					if (x > max_x) max_x = x;
					if (y > max_y) max_y = y;

				}

                //imageData.data[p+3]=0;
            }
        }

		if (max_x){
			return {
				x : min_x,
				y : min_y,
				width : max_x - min_x,
				height : max_y - min_y,
				imageData: imageData,
			};
		}
        return null;
    }

	window.onload = function() {

		if (window.location.href.indexOf("show") > 0){
			$("div").show();
		}

		var v = $e("vv");
		v.load();
		//v.play();

		var shoot = $e("shoot");
		var shoot_ctx = shoot.getContext("2d");

		var videoWidth = 352;
		var videoHeight = 360;

		//video事件，先触发play，再触发loadedmetadata

		v.addEventListener('loadedmetadata', function(){
			return;
			//重置高宽
			videoWidth = v.videoWidth;
			videoHeight = v.videoHeight;
			canvas.width = videoWidth;
			canvas.height = videoHeight;
			shoot.width = videoWidth;
			shoot.height = videoHeight;
		});

		//渲染画面
		v.addEventListener('play',function() {
			var head = $e("ahead");
			var i = window.setInterval(function(){
				var start = new Date();
				ctx.drawImage(v, 0, 0, videoWidth, videoHeight);

				if (filter == 1){
					try{
						var imageData = ctx.getImageData(0, 0, videoWidth, videoHeight);
						var re = checkPosition(imageData);
						if (re){
							//put a head into the picture
							ctx.putImageData(re.imageData, 0, 0);
							ctx.drawImage(head, re.x, re.y, re.width, re.height);
						}
					}catch(e){
						alert("视频被重定向了，无法跨域读取");
						clearInterval(i);
					}
				}

			}, 65);

		});

		//截图
		var imgCount = 0;

		$("#saveImageBtn").on("click", function(){
			shoot_ctx.drawImage(canvas, 0, 0, videoWidth, videoHeight);

			imgCount++;
			shoot_ctx.fillStyle = "rgba(0, 0, 0, 0.5)";
			shoot_ctx.fillRect(10,10,50,50);
			shoot_ctx.font = "40pt Calibri";
			shoot_ctx.fillStyle = "rgba( 255, 255, 255, 0.8)"; // black color
			shoot_ctx.fillText("" + imgCount, 22, 50);

			var imgData = shoot.toDataURL("image/png");
			var img = new Image();
			img.src = imgData;
			$("#saveImg").append(img);
		});

		var playStatus = false;
		$("#stop").on("click", function(){
			if (playStatus){
				this.innerHTML = "播放";
				v.pause();

			}
			else{
				this.innerHTML = "暂停";
				v.play();
			}
			playStatus = !playStatus;
		});

		$("#myTurn").on("click", function(){
			filter = 1;
		});

		$("#reset").on("click", function(){
			filter = 0;
		});

		$("#tit").dblclick(function(){
			$("div").show();
		});

	};

</script>
</html>