这个问题起源于上一期html5视频无法在Android手机上播放。 （Three.js WebGLRenderered videos don't play on android phones）
正如mrdoob所提到的，video.play（）应该通过用户发起的事件（如点击）在移动设备上显式显示。完成后，我已经能够播放该文件了。但是我只能听到视频的音频部分。屏幕仍然是空白的。此外，我在开发控制台上看到以下异常。
Uncaught SecurityError：无法在'WebGLRenderingContext'上执行'texImage2D'：视频元素包含跨源数据，可能无法加载。 three.min.js：507
我没有通过我的代码加载任何图像，如下面的代码所示，错误似乎在three.min.js文件中引发。 （以下代码是http://threejs.org/examples/#webgl_materials_video的略微修改版本，以使其在移动设备上运行）
请注意，这只发生在移动设备上。该示例在网络上完美运行。
非常感谢您的帮助！
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - materials - video</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
background-color: #000;
color: #fff;
margin: 0px;
overflow: hidden;
font-family:Monospace;
font-size:13px;
text-align:center;
font-weight: bold;
text-align:center;
}
a {
color:#0078ff;
}
#info {
color:#fff;
position: absolute;
top: 0px; width: 100%;
padding: 5px;
z-index:100;
}
</style>
</head>
<body>
<div id="info">
<a href="http://threejs.org" target="_blank">three.js</a> - webgl video demo. playing <a href="http://durian.blender.org/" target="_blank">sintel</a> trailer
</div>
<script src="js/three.min.js"></script>
<script src="js/shaders/ConvolutionShader.js"></script>
<script src="js/shaders/CopyShader.js"></script>
<script src="js/postprocessing/EffectComposer.js"></script>
<script src="js/postprocessing/RenderPass.js"></script>
<script src="js/postprocessing/MaskPass.js"></script>
<script src="js/postprocessing/BloomPass.js"></script>
<script src="js/postprocessing/ShaderPass.js"></script>
<script src="js/Detector.js"></script>
<video id="video" autoplay loop style="display:none">
<source src="textures/sintel.mp4" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"'>
<source src="textures/sintel.ogv" type='video/ogg; codecs="theora, vorbis"'>
</video>
<script>
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var container;
var camera, scene, renderer, element;
var video, texture, material, mesh;
var composer;
var mouseX = 0;
var mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
var cube_count,
meshes = [],
materials = [],
xgrid = 20,
ygrid = 10;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.z = 500;
scene = new THREE.Scene();
var light = new THREE.DirectionalLight( 0xffffff );
light.position.set( 0.5, 1, 1 ).normalize();
scene.add( light );
renderer = new THREE.WebGLRenderer( { antialias: false } );
renderer.setSize( window.innerWidth, window.innerHeight );
element=renderer.domElement;
element.addEventListener('click', fullscreen, false);
container.appendChild( renderer.domElement );
video = document.getElementById( 'video' );
texture = new THREE.Texture( video );
texture.minFilter = THREE.LinearFilter;
texture.magFilter = THREE.LinearFilter;
texture.format = THREE.RGBFormat;
texture.generateMipmaps = false;
//
var i, j, ux, uy, ox, oy,
geometry,
xsize, ysize;
ux = 1 / xgrid;
uy = 1 / ygrid;
xsize = 480 / xgrid;
ysize = 204 / ygrid;
var parameters = { color: 0xffffff, map: texture },
material_base = new THREE.MeshLambertMaterial( parameters );
renderer.initMaterial( material_base, scene.__lights, scene.fog );
cube_count = 0;
for ( i = 0; i < xgrid; i ++ )
for ( j = 0; j < ygrid; j ++ ) {
ox = i;
oy = j;
geometry = new THREE.BoxGeometry( xsize, ysize, xsize );
change_uvs( geometry, ux, uy, ox, oy );
materials[ cube_count ] = new THREE.MeshLambertMaterial( parameters );
material = materials[ cube_count ];
material.hue = i/xgrid;
material.saturation = 1 - j/ygrid;
material.color.setHSL( material.hue, material.saturation, 0.5 );
mesh = new THREE.Mesh( geometry, material );
mesh.position.x = ( i - xgrid/2 ) * xsize;
mesh.position.y = ( j - ygrid/2 ) * ysize;
mesh.position.z = 0;
mesh.scale.x = mesh.scale.y = mesh.scale.z = 1;
scene.add( mesh );
mesh.dx = 0.001 * ( 0.5 - Math.random() );
mesh.dy = 0.001 * ( 0.5 - Math.random() );
meshes[ cube_count ] = mesh;
cube_count += 1;
}
renderer.autoClear = false;
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
// postprocessing
var renderModel = new THREE.RenderPass( scene, camera );
var effectBloom = new THREE.BloomPass( 1.3 );
var effectCopy = new THREE.ShaderPass( THREE.CopyShader );
effectCopy.renderToScreen = true;
composer = new THREE.EffectComposer( renderer );
composer.addPass( renderModel );
composer.addPass( effectBloom );
composer.addPass( effectCopy );
//
window.addEventListener( 'resize', onWindowResize, false );
}
function fullscreen() {
video.play();
console.log(video);
if (container.requestFullscreen) {
container.requestFullscreen();
} else if (container.msRequestFullscreen) {
container.msRequestFullscreen();
} else if (container.mozRequestFullScreen) {
container.mozRequestFullScreen();
} else if (container.webkitRequestFullscreen) {
container.webkitRequestFullscreen();
}
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
composer.reset();
}
function change_uvs( geometry, unitx, unity, offsetx, offsety ) {
var faceVertexUvs = geometry.faceVertexUvs[ 0 ];
for ( var i = 0; i < faceVertexUvs.length; i ++ ) {
var uvs = faceVertexUvs[ i ];
for ( var j = 0; j < uvs.length; j ++ ) {
var uv = uvs[ j ];
uv.x = ( uv.x + offsetx ) * unitx;
uv.y = ( uv.y + offsety ) * unity;
}
}
}
function onDocumentMouseMove(event) {
mouseX = ( event.clientX - windowHalfX );
mouseY = ( event.clientY - windowHalfY ) * 0.3;
}
//
function animate() {
requestAnimationFrame( animate );
render();
}
var h, counter = 1;
function render() {
var time = Date.now() * 0.00005;
camera.position.x += ( mouseX - camera.position.x ) * 0.05;
camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
camera.lookAt( scene.position );
if ( video.readyState === video.HAVE_ENOUGH_DATA ) {
if ( texture ) texture.needsUpdate = true;
}
for ( i = 0; i < cube_count; i ++ ) {
material = materials[ i ];
h = ( 360 * ( material.hue + time ) % 360 ) / 360;
material.color.setHSL( h, material.saturation, 0.5 );
}
if ( counter % 1000 > 200 ) {
for ( i = 0; i < cube_count; i ++ ) {
mesh = meshes[ i ];
mesh.rotation.x += 10 * mesh.dx;
mesh.rotation.y += 10 * mesh.dy;
mesh.position.x += 200 * mesh.dx;
mesh.position.y += 200 * mesh.dy;
mesh.position.z += 400 * mesh.dx;
}
}
if ( counter % 1000 === 0 ) {
for ( i = 0; i < cube_count; i ++ ) {
mesh = meshes[ i ];
mesh.dx *= -1;
mesh.dy *= -1;
}
}
counter ++;
renderer.clear();
composer.render();
}
</script>
</body>
</html>
答案 0 :(得分：4)
正如此处所讨论的那样：https://code.google.com/p/chromium/issues/detail?id=173727“视频”属性应具有此设置：
video.setAttribute('crossorigin', 'anonymous');
但仅凭这一点并不能解决问题。这必须在.load（）和.play（）之前设置。我在.load（）之后有了这个，但它没有用。所以这样做：
video.setAttribute('crossorigin', 'anonymous');
video.src = "video/test.m4v";
video.src = "video/test.mp4";
video.load(); // must call after setting/changing source
video.play();
此解决方案适用于因移动设备无法播放的视频，特别是由于上述安全错误。
要清楚crossorigin设置告诉浏览器要求服务器允许使用该视频。服务器仍然必须提供该权限。如果服务器未授予权限设置，则crossorigin属性将不允许您使用该视频。
答案 1 :(得分：3)
这是Google针对此问题的最佳结果，因此如果您在移动问题的上下文之外遇到此错误（我就是这样做的话），请尝试在本地服务器上运行该页面以解决交叉起源问题。所以，例如，如果你有python，你可以尝试：
$ python -m SimpleHTTPServer
从您的网页所在的目录开始，然后该页面将从http://localhost:8000开始提供。或者使用您选择的本地服务器。