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使用 YouTube AV1

使用 AV1 进行 YouTube 视频播放

当前为 2023-08-19 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name                Use YouTube AV1
  3. // @description         Use AV1 for video playback on YouTube
  4. // @name:zh-TW          使用 YouTube AV1
  5. // @description:zh-TW   使用 AV1 進行 YouTube 影片播放
  6. // @name:zh-HK          使用 YouTube AV1
  7. // @description:zh-HK   使用 AV1 進行 YouTube 影片播放
  8. // @name:zh-CN          使用 YouTube AV1
  9. // @description:zh-CN   使用 AV1 进行 YouTube 视频播放
  10. // @name:ja             YouTube AV1 の使用
  11. // @description:ja      YouTube の動画再生に AV1 を使用する
  12. // @name:ko             YouTube AV1 사용
  13. // @description:ko      YouTube의 동영상 재생에 AV1을 사용하기
  14. // @name:vi             Sử dụng YouTube AV1
  15. // @description:vi      Sử dụng AV1 để phát video trên YouTube
  16. // @name:de             YouTube AV1 verwenden
  17. // @description:de      Verwende AV1 für die Videowiedergabe auf YouTube
  18. // @name:fr             Utiliser YouTube AV1
  19. // @description:fr      Utiliser AV1 pour la lecture des vidéos sur YouTube
  20. // @name:it             Usa YouTube AV1
  21. // @description:it      Usa AV1 per la riproduzione dei video su YouTube
  22. // @name:es             Usar AV1 en YouTube
  23. // @description:es      Usar AV1 para la reproducción de videos en YouTube
  24. // @namespace           http://tampermonkey.net/
  25. // @version             2.3.1
  26. // @author              CY Fung
  27. // @match               https://www.youtube.com/*
  28. // @match               https://www.youtube.com/embed/*
  29. // @match               https://www.youtube-nocookie.com/embed/*
  30. // @exclude             https://www.youtube.com/live_chat*
  31. // @exclude             https://www.youtube.com/live_chat_replay*
  32. // @exclude             /^https?://\S+\.(txt|png|jpg|jpeg|gif|xml|svg|manifest|log|ini)[^\/]*$/
  33. // @icon                https://www.google.com/s2/favicons?sz=64&domain=youtube.com
  34. // @grant               none
  35. // @run-at              document-start
  36. // @license             MIT
  37. //
  38. // @compatible          firefox Violentmonkey
  39. // @compatible          firefox Tampermonkey
  40. // @compatible          firefox FireMonkey
  41. // @compatible          chrome Violentmonkey
  42. // @compatible          chrome Tampermonkey
  43. // @compatible          opera Violentmonkey
  44. // @compatible          opera Tampermonkey
  45. // @compatible          safari Stay
  46. // @compatible          edge Violentmonkey
  47. // @compatible          edge Tampermonkey
  48. // @compatible          brave Violentmonkey
  49. // @compatible          brave Tampermonkey
  50. //
  51. // @unwrap
  52. // @allFrames           true
  53. // @inject-into         page
  54. // ==/UserScript==
  55.  
  56.  
  57.  
  58. (function (__Promise__) {
  59.   'use strict';
  60.  
  61.   /** @type {globalThis.PromiseConstructor} */
  62.   const Promise = (async () => { })().constructor; // YouTube hacks Promise in WaterFox Classic and "Promise.resolve(0)" nevers resolve.
  63.  
  64.   console.debug("force-youtube-av1", "injected");
  65.  
  66.   function enableAV1() {
  67.  
  68.  
  69.     // This is the setting to force AV1
  70.     // localStorage['yt-player-av1-pref'] = '8192';
  71.     try {
  72.       Object.defineProperty(localStorage.constructor.prototype, 'yt-player-av1-pref', {
  73.         get() {
  74.           if (this === localStorage) return '8192';
  75.           return this.getItem('yt-player-av1-pref');
  76.         },
  77.         set(nv) {
  78.           this.setItem('yt-player-av1-pref', nv);
  79.           return true;
  80.         },
  81.         enumerable: true,
  82.         configurable: true
  83.       });
  84.     } catch (e) {
  85.       // localStorage['yt-player-av1-pref'] = '8192';
  86.     }
  87.  
  88.     if (localStorage['yt-player-av1-pref'] !== '8192') {
  89.  
  90.       console.log('Use YouTube AV1 is not supported in your browser.');
  91.       return;
  92.     }
  93.  
  94.  
  95.     console.debug("force-youtube-av1", "AV1 enabled");
  96.  
  97.     let firstDa = true;
  98.     const { setInterval, clearInterval, setTimeout } = window;
  99.     let cid = setInterval.call(window, () => {
  100.  
  101.       const da = (window.ytcfg && window.ytcfg.data_) ? window.ytcfg.data_ : null;
  102.       if (!da) return;
  103.  
  104.       const isFirstDa = firstDa;
  105.       firstDa = false;
  106.  
  107.       const EXPERIMENT_FLAGS = da.EXPERIMENT_FLAGS || null;
  108.       if (EXPERIMENT_FLAGS) {
  109.         EXPERIMENT_FLAGS.html5_disable_av1_hdr = false;
  110.         EXPERIMENT_FLAGS.html5_prefer_hbr_vp9_over_av1 = false;
  111.         EXPERIMENT_FLAGS.html5_account_onesie_format_selection_during_format_filter = false;
  112.         // EXPERIMENT_FLAGS.html5_perf_cap_override_sticky = true;
  113.         // EXPERIMENT_FLAGS.html5_perserve_av1_perf_cap = true;
  114.       }
  115.  
  116.       if (isFirstDa) {
  117.  
  118.  
  119.         let mo = new MutationObserver(() => {
  120.  
  121.           mo.disconnect();
  122.           mo.takeRecords();
  123.           mo = null;
  124.           setTimeout(() => {
  125.             clearInterval.call(window, cid);
  126.           })
  127.         });
  128.         mo.observe(document, { subtree: true, childList: true });
  129.  
  130.  
  131.       }
  132.  
  133.  
  134.     });
  135.  
  136.  
  137.  
  138.     function typeTest(type) {
  139.  
  140.       if (typeof type ==='string' && type.startsWith('video/')) {
  141.         if (type.includes('av01')) {
  142.           if (/codecs[^\w]+av01\b/.test(type)) return true;
  143.         } else if (type.includes('av1')) {
  144.           if (/codecs[^\w]+av1\b/.test(type)) return true;
  145.         }
  146.       }
  147.  
  148.     }
  149.  
  150.     // return a custom MIME type checker that can defer to the original function
  151.     function makeModifiedTypeChecker(origChecker) {
  152.       // Check if a video type is allowed
  153.       return function (type) {
  154.         let res = undefined;
  155.         if (type === undefined) res = false;
  156.         else {
  157.           res = typeTest(type);
  158.         }
  159.         if (res === undefined) res = origChecker.apply(this, arguments);
  160.  
  161.         // console.debug(20, type, res)
  162.  
  163.         return res;
  164.       };
  165.     }
  166.  
  167.     // Override video element canPlayType() function
  168.     const proto = (HTMLVideoElement || 0).prototype;
  169.     if (proto && typeof proto.canPlayType == 'function') {
  170.       proto.canPlayType = makeModifiedTypeChecker(proto.canPlayType);
  171.     }
  172.  
  173.     // Override media source extension isTypeSupported() function
  174.     const mse = window.MediaSource;
  175.     // Check for MSE support before use
  176.     if (mse && typeof mse.isTypeSupported == 'function') {
  177.       mse.isTypeSupported = makeModifiedTypeChecker(mse.isTypeSupported);
  178.     }
  179.  
  180.   }
  181.  
  182.  
  183.  
  184.   function callback(result) {
  185.  
  186.     if (result && result.supported && result.smooth) enableAV1();
  187.     else {
  188.       console.warn("force-youtube-av1", 'Your browser does not support AV1. You might conside to use the latest version of Google Chrome or Mozilla FireFox.');
  189.  
  190.     }
  191.   }
  192.  
  193.   let promise = null;
  194.  
  195.   try {
  196.     promise = navigator.mediaCapabilities.decodingInfo({
  197.       type: "file",
  198.       video: {
  199.         contentType: "video/mp4; codecs=av01.0.05M.08.0.110.05.01.06.0",
  200.         height: 1080,
  201.         width: 1920,
  202.         framerate: 30,
  203.         bitrate: 2826848,
  204.       },
  205.       audio: {
  206.         contentType: "audio/webm; codecs=opus",
  207.         channels: "2.1",
  208.         samplerate: 44100,
  209.         bitrate: 255236,
  210.       }
  211.     });
  212.   } catch (e) {
  213.     promise = null;
  214.   }
  215.  
  216.   (promise || Promise.resolve(0)).then(callback).catch(callback);
  217.  
  218.  
  219.  
  220. })(Promise);