【发布时间】：2014-11-24 09:53:12
【问题描述】：
下面的视频纹理示例似乎不适用于 android LG nexus 手机，尽管所有其他非视频示例都可以使用，包括 three.js 上的 youtube 示例。
还有其他人有这个问题吗？我正在尝试使用 THREE.WebGLRenderer 渲染视频，以便我最终可以使用立体效果来将其与 VR（如谷歌纸板）套件一起使用。到目前为止，似乎只有 CSS3DRenderer/Canvas 渲染的视频可以在手机上运行。但我不能使用这些渲染器，因为立体效果不适用于这些渲染器（即 effect = new THREE.StereoEffect(renderer);)
http://mrdoob.github.io/three.js/examples/webgl_materials_video.html
如果有立体效果的视频渲染，请告诉我。
更新---------------手头代码（改编自http://stemkoski.github.io/Three.js/Video.html）
<!doctype html>
<html lang="en">
<head>
<title>Video Texture (Three.js)</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<!-- <link rel=stylesheet href="css/base.css"/> -->
</head>
<body>
<script src="js/three.min.js"></script>
<script src="js/controls/OrbitControls.js"></script>
<script src="js/effects/StereoEffect.js"></script>
<div id="ThreeJS"></div>
<script>
var container, scene, camera, renderer, controls, stats, effect, element;
var video, videoImage, videoImageContext, videoTexture;
init();
animate();
// FUNCTIONS
function init()
{
// SCENE
scene = new THREE.Scene();
// CAMERA
var SCREEN_WIDTH = window.innerWidth, SCREEN_HEIGHT = window.innerHeight;
var VIEW_ANGLE = 45, ASPECT = SCREEN_WIDTH / SCREEN_HEIGHT, NEAR = 0.1, FAR = 20000;
camera = new THREE.PerspectiveCamera( VIEW_ANGLE, ASPECT, NEAR, FAR);
scene.add(camera);
camera.position.set(0,150,400);
camera.lookAt(scene.position);
renderer = new THREE.WebGLRenderer( {antialias:true} );
//effect = new THREE.StereoEffect(renderer);
renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
element= renderer.domElement;
//effect.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
container = document.getElementById( 'ThreeJS' );
container.appendChild( element );
// CONTROLS
controls = new THREE.OrbitControls( camera, element );
element.addEventListener('click', fullscreen, false);
// LIGHT
var light = new THREE.PointLight(0xffffff);
light.position.set(0,250,0);
scene.add(light);
///////////
// VIDEO //
///////////
// create the video element
video = document.createElement( 'video' );
//video.id = 'video';
video.type = ' video/mp4; codecs="theora, vorbis" ';
video.src = "video/sintel.ogv";
video.load(); // must call after setting/changing source
video.play();
videoImage = document.createElement( 'canvas' );
videoImage.width = 320;
videoImage.height = 240;
videoImageContext = videoImage.getContext( '2d' );
// background color if no video present
videoImageContext.fillStyle = '#000000';
videoImageContext.fillRect( 0, 0, videoImage.width, videoImage.height );
videoTexture = new THREE.Texture( videoImage );
videoTexture.minFilter = THREE.LinearFilter;
videoTexture.magFilter = THREE.LinearFilter;
var movieMaterial = new THREE.MeshBasicMaterial( { map: videoTexture, overdraw: true, side:THREE.DoubleSide } );
// the geometry on which the movie will be displayed;
// movie image will be scaled to fit these dimensions.
var movieGeometry = new THREE.PlaneGeometry( 240, 100, 4, 4 );
var movieScreen = new THREE.Mesh( movieGeometry, movieMaterial );
movieScreen.position.set(0,50,00);
scene.add(movieScreen);
camera.position.set(0,150,300);
camera.lookAt(movieScreen.position);
window.addEventListener('resize', resize, false);
setTimeout(resize, 1);
}
function update() {
resize();
camera.updateProjectionMatrix();
controls.update();
}
function animate()
{
requestAnimationFrame( animate );
render();
//update();
}
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 resize() {
var width = container.offsetWidth;
var height = container.offsetHeight;
//console.log(container, width,height);
camera.aspect = width / height;
camera.updateProjectionMatrix();
renderer.setSize(width, height);
//effect.setSize(width, height);
}
function render()
{
if ( video.readyState === video.HAVE_ENOUGH_DATA )
{
videoImageContext.drawImage( video, 0, 0 );
if ( videoTexture )
videoTexture.needsUpdate = true;
}
renderer.render( scene, camera );
}
</script>
</body>
</html>
【问题讨论】：
-
所以我能够播放视频（有点）。我听到了音频，但没有看到视频。这是通过删除此博客文章中建议的类型属性来完成的：broken-links.com/2010/07/08/… 但是，当视频的音频部分播放时，我在开发控制台上看到了这些错误。 未捕获的安全错误：无法在“WebGLRenderingContext”上执行“texImage2D”：可能无法加载受污染的画布。三分钟.js:507
标签： three.js html5-video nexus-4