add video_replay sample #1593
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| <!DOCTYPE html> | ||
| <!-- | ||
| * Copyright (c) 2023 The WebRTC project authors. All Rights Reserved. | ||
| * | ||
| * Use of this source code is governed by a BSD-style license | ||
| * that can be found in the LICENSE file in the root of the source | ||
| * tree. | ||
| --> | ||
| <html> | ||
| <head> | ||
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| <meta charset="utf-8"> | ||
| <meta name="description" content="WebRTC code samples"> | ||
| <meta name="viewport" content="width=device-width, user-scalable=yes, initial-scale=1, maximum-scale=1"> | ||
| <meta itemprop="description" content="Client-side WebRTC code samples"> | ||
| <meta itemprop="image" content="../../../images/webrtc-icon-192x192.png"> | ||
| <meta itemprop="name" content="WebRTC code samples"> | ||
| <meta name="mobile-web-app-capable" content="yes"> | ||
| <meta id="theme-color" name="theme-color" content="#ffffff"> | ||
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| <base target="_blank"> | ||
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| <title>Insertable Streams - video_replay in the browser using WebCodecs</title> | ||
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| <link rel="icon" sizes="192x192" href="../../../images/webrtc-icon-192x192.png"> | ||
| <link href="https://fonts.googleapis.com/css?family=Roboto:300,400,500,700" rel="stylesheet" type="text/css"> | ||
| <link rel="stylesheet" href="../../../css/main.css"/> | ||
| </head> | ||
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| <body> | ||
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| <div id="container"> | ||
| <h1><a href="//webrtc.github.io/samples/" title="WebRTC samples homepage">WebRTC samples</a> | ||
| <span>video_replay for Chrome</span></h1> | ||
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| <p> | ||
| This sample shows how how load an IVF file generated by libWebRTC's | ||
| <a href="https://source.chromium.org/chromium/chromium/src/+/main:third_party/webrtc/rtc_tools/video_replay.cc"> | ||
| video_replay tool</a> in the browser using WebCodecs and MediaStreamTrackGenerator. | ||
| This is useful since the browser uses different decoders for video than the native libWebRTC ones. | ||
| </p> | ||
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| <video id="localVideo" playsinline autoplay muted></video> | ||
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| <div class="box"> | ||
| <label for="input">IVF file to load:</label> | ||
| <input id="input" type="file"> | ||
| </div> | ||
| <div id="metadata"> | ||
| </div> | ||
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| <p> | ||
| <b>Note</b>: This sample is using an experimental API that has not yet been standardized. As | ||
| of 2023-02-27, this API is available in the latest version of Chrome based browsers. | ||
| </p> | ||
| <a href="https://github.com/webrtc/samples/tree/gh-pages/src/content/insertable-streams/video-replay" | ||
| title="View source for this page on GitHub" id="viewSource">View source on GitHub</a> | ||
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| </div> | ||
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| <script src="https://webrtc.github.io/adapter/adapter-latest.js"></script> | ||
| <script src="js/main.js" async></script> | ||
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| <script src="../../../js/lib/ga.js"></script> | ||
| </body> | ||
| </html> |
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| /* | ||
| * Copyright (c) 2023 The WebRTC project authors. All Rights Reserved. | ||
| * | ||
| * Use of this source code is governed by a BSD-style license | ||
| * that can be found in the LICENSE file in the root of the source | ||
| * tree. | ||
| */ | ||
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| 'use strict'; | ||
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| /* global MediaStreamTrackGenerator, EncodedVideoChunk */ | ||
| if (typeof MediaStreamTrackGenerator === 'undefined') { | ||
| alert( | ||
| 'Your browser does not support the experimental MediaStreamTrack API ' + | ||
| 'for Insertable Streams of Media. See the note at the bottom of the ' + | ||
| 'page.'); | ||
| } | ||
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| // Reader for the IVF file format as described by | ||
| // https://wiki.multimedia.cx/index.php/Duck_IVF | ||
| class IVF { | ||
| constructor(file) { | ||
| this.blob = file; | ||
| this.offset = 0; | ||
| } | ||
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| async readHeader() { | ||
| if (this.offset !== 0) { | ||
| console.error('readHeader called not at start of file.'); | ||
| return; | ||
| } | ||
| this.offset = 32; | ||
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| const header = await this.blob.slice(0, 32).arrayBuffer(); | ||
| const view = new DataView(header); | ||
| const decoder = new TextDecoder('ascii'); | ||
| return { | ||
| codec: decoder.decode(header.slice(8, 12)), | ||
| width: view.getUint16(12, true), | ||
| height: view.getUint16(14, true), | ||
| fpsDenominator: view.getUint32(16, true), | ||
| fpsNumerator: view.getUint32(20, true), | ||
| }; | ||
| } | ||
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| async readFrame() { | ||
| if (this.offset == this.blob.size) { | ||
| return; // done. | ||
| } else if (this.offset === 0) { | ||
| console.error('readFrame called without reading header.'); | ||
| return; | ||
| } | ||
| const header = await this.blob.slice(this.offset, this.offset + 12).arrayBuffer(); | ||
| const view = new DataView(header); | ||
| const frameLength = view.getUint32(0, true); | ||
| const timestamp = view.getBigUint64(4, true); | ||
| const currentOffset = this.offset; | ||
| this.offset += 12 + frameLength; | ||
| return { | ||
| timestamp, | ||
| data: new Uint8Array(await this.blob.slice(currentOffset + 12, currentOffset + 12 + frameLength).arrayBuffer()), | ||
| }; | ||
| } | ||
| } | ||
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| // Translate between IVF fourcc codec names and WebCodec named. | ||
| const IVF2WebCodecs = { | ||
| VP80: 'vp8', | ||
| VP90: 'vp09.00.10.08', | ||
| H264: 'avc1.42E01F', | ||
| AV01: 'av01.0.08M.08.0.110.09', // AV1 Main Profile, level 4.0, Main tier, 8-bit content, non-monochrome, with 4:2:0 chroma subsampling | ||
| }; | ||
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| const input = document.getElementById('input'); | ||
| const localVideo = document.getElementById('localVideo'); | ||
| const metadata = document.getElementById('metadata'); | ||
| input.onchange = async (event) => { | ||
| event.target.disabled = true; | ||
| const file = event.target.files[0]; | ||
| const ivf = new IVF(file); | ||
| const generator = new MediaStreamTrackGenerator('video'); | ||
| const writer = generator.writable.getWriter(); | ||
| localVideo.srcObject = new MediaStream([generator]); | ||
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| const header = await ivf.readHeader(); | ||
| if (header) { | ||
| metadata.innerText = 'File metadata: ' + JSON.stringify(header, null, ' '); | ||
| } else { | ||
| metadata.innerText = 'Failed to load IVF file.'; | ||
| return; | ||
| } | ||
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| const decoder = new VideoDecoder({ | ||
| output: async (frame) => { | ||
| await writer.write(frame); | ||
| frame.close(); | ||
| const nextFrame = await ivf.readFrame(); | ||
| if (nextFrame) { | ||
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| decoder.decode(new EncodedVideoChunk({ | ||
| timestamp: Number(nextFrame.timestamp - firstFrame.timestamp) * 1000, | ||
| type: 'delta', | ||
| data: nextFrame.data, | ||
| })); | ||
| } else { | ||
| decoder.flush(); | ||
| } | ||
| }, | ||
| error: e => console.error(e.message, e), | ||
| }); | ||
| VideoDecoder.isConfigSupported({codec: IVF2WebCodecs[header.codec], codedWidth: header.width, codedHeight: header.height}) | ||
| .then(config => console.log(config)) | ||
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Check failure on line 112 in src/content/insertable-streams/video-replay/js/main.js
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| decoder.configure({ | ||
| codec: IVF2WebCodecs[header.codec], | ||
| codedWidth: header.width, | ||
| codedHeight: header.height, | ||
| }); | ||
| const firstFrame = await ivf.readFrame(); | ||
| decoder.decode(new EncodedVideoChunk({ | ||
| timestamp: 0, | ||
| type: 'key', | ||
| data: firstFrame.data, | ||
| })); | ||
| }; | ||
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I am not sure this is correct or it takes the headers timescale into account. But I don't have a great sample file to check at hand.