samien
/
three.js
mirror de https://github.com/mrdoob/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgpu - video frames</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="example.css">
	</head>
	<body>

		<div id="info">
			<a href="https://threejs.org/" target="_blank" rel="noopener" class="logo-link"></a>

			<div class="title-wrapper">
				<a href="https://threejs.org/" target="_blank" rel="noopener">three.js</a><span>Video Frames</span>
			</div>

			<small>
				Decodes all frames from a MP4 file and renders them onto a plane as fast as possible.<br/>
				<a href="https://github.com/gpac/mp4box.js/" target="_blank" rel="noopener">mp4box.js</a> used for MP4 parsing.
			</small>
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.webgpu.js",
					"three/webgpu": "../build/three.webgpu.js",
					"three/tsl": "../build/three.tsl.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three/webgpu';

			import { MP4Demuxer } from 'three/addons/libs/demuxer_mp4.js';

			let camera, scene, renderer;

			init();

			function init() {

				camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, .25, 10 );
				camera.position.set( 0, 0, 1 );

				scene = new THREE.Scene();

				const geometry = new THREE.PlaneGeometry();

				const videoTexture = new THREE.VideoFrameTexture();
				videoTexture.colorSpace = THREE.SRGBColorSpace;

				const decoder = new VideoDecoder( {
					output( frame ) {

						// To avoid video decoder stalls, we should close the VideoFrame which is no longer needed. https://w3c.github.io/webcodecs/#dom-videodecoder-decode
						if ( videoTexture.image instanceof VideoFrame ) videoTexture.image.close();

						videoTexture.setFrame( frame );
			
					},
					error( e ) {

						console.error( 'VideoDecoder:', e );

					}
				} );

				new MP4Demuxer( './textures/sintel.mp4', {
					onConfig( config ) {

						decoder.configure( config );

					},
					onChunk( chunk ) {

						decoder.decode( chunk );

					},
					setStatus( kind, status ) {

						console.info( 'MP4Demuxer:', kind );

						if ( kind === 'fetch' && status === 'Done' ) {

							decoder.flush().then( () => {

								decoder.close();

								// In case our VideoFrameTexture is no longer needed, we should close its backed VideoFrame, see issue #30379:
								if ( videoTexture.image instanceof VideoFrame ) videoTexture.image.close();

								videoTexture.image = null;

								scene.remove( mesh );

							} );

						}

					}
				} );
			
				const material = new THREE.MeshBasicMaterial( { map: videoTexture } );

				const mesh = new THREE.Mesh( geometry, material );
				scene.add( mesh );

				renderer = new THREE.WebGPURenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				document.body.appendChild( renderer.domElement );

				//

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function animate() {

				renderer.render( scene, camera );

			}


		</script>
	</body>
</html>