问题
The video texture example below does not seem to work on android LG nexus phone although all other non video examples work including the youtube example on three.js.
Does anyone else have this issue? I am trying to render video using THREE.WebGLRenderer so that I can ultimately use stereo effect with it to use it with VR (like google cardboard) kit. So far only CSS3DRenderer/Canvas rendered videos seem to work on the phone. But I can't use these renderers because stereo effect does not work with these renderers (i.e effect = new THREE.StereoEffect(renderer);)
http://mrdoob.github.io/three.js/examples/webgl_materials_video.html
Please let me know if there is to get videos render with stereo effect.
UPDATE---------------CODE ON HAND (Adapted from 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>
回答1:
On mobile devices videos don't play unless initiated from a user action. So if you execute the init method from a mousedown event listener it should work.
来源：https://stackoverflow.com/questions/26109487/three-js-webglrenderered-videos-dont-play-on-android-phones