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YouTube Codecs - Hardware Acceleration Only

Use codecs with hardware accleration supported for media playback on YouTube

当前为 2025-06-02 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name                YouTube Codecs - Hardware Acceleration Only
  3. // @name:zh-TW          YouTube Codecs - Hardware Acceleration Only
  4. // @name:zh-HK          YouTube Codecs - Hardware Acceleration Only
  5. // @name:zh-CN          YouTube Codecs - Hardware Acceleration Only
  6. // @name:ja             YouTube Codecs - Hardware Acceleration Only
  7. // @name:ko             YouTube Codecs - Hardware Acceleration Only
  8. // @name:vi             YouTube Codecs - Hardware Acceleration Only
  9. // @name:de             YouTube Codecs - Hardware Acceleration Only
  10. // @name:fr             YouTube Codecs - Hardware Acceleration Only
  11. // @name:it             YouTube Codecs - Hardware Acceleration Only
  12. // @name:es             YouTube Codecs - Hardware Acceleration Only
  13. // @description         Use codecs with hardware accleration supported for media playback on YouTube
  14. // @description:zh-TW   Use codecs with hardware accleration supported for media playback on YouTube
  15. // @description:zh-HK   Use codecs with hardware accleration supported for media playback on YouTube
  16. // @description:zh-CN   Use codecs with hardware accleration supported for media playback on YouTube
  17. // @description:ja      Use codecs with hardware accleration supported for media playback on YouTube
  18. // @description:ko      Use codecs with hardware accleration supported for media playback on YouTube
  19. // @description:vi      Use codecs with hardware accleration supported for media playback on YouTube
  20. // @description:de      Use codecs with hardware accleration supported for media playback on YouTube
  21. // @description:fr      Use codecs with hardware accleration supported for media playback on YouTubee
  22. // @description:it      Use codecs with hardware accleration supported for media playback on YouTube
  23. // @description:es      Use codecs with hardware accleration supported for media playback on YouTube
  24. // @namespace           http://tampermonkey.net/
  25. // @version             0.0.1
  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. (function (__Promise__) {
  57.   'use strict';
  58.  
  59.   /** @type {globalThis.PromiseConstructor} */
  60.   const Promise = (async () => { })().constructor; // YouTube hacks Promise in WaterFox Classic and "Promise.resolve(0)" nevers resolve.
  61.  
  62.   const storageKey = '__codecs_vvgZHhgVKfAlY0__';
  63.   let useCache = false;
  64.   let useAV1 = false;
  65.   const getMap = () => {
  66.     const v = localStorage[storageKey]
  67.     if (v) {
  68.       try {
  69.         const obj = JSON.parse(v);
  70.         const resMap = new Map(Object.entries(obj));
  71.         useCache = true;
  72.         return resMap;
  73.       } catch (e) { }
  74.     }
  75.     return new Map();
  76.   }
  77.  
  78.   const objectKey = '__codecs_qyg8YVnvXJZ9E5__';
  79.  
  80.   const __codecs__ = window[objectKey] || (window[objectKey] = getMap());
  81.  
  82.   const testCodec = async (codec) => {
  83.  
  84.     if (!codec) return null;
  85.  
  86.     if (__codecs__.has(codec)) return __codecs__.get(codec);
  87.  
  88.     __codecs__.set(codec, null);
  89.  
  90.     const config = {
  91.       codec: codec,
  92.       hardwareAcceleration: 'prefer-hardware',
  93.       width: 1920,
  94.       height: 1080,
  95.       bitrate: 12_000_000,
  96.       bitrateMode: "variable",
  97.       framerate: 60,
  98.       sampleRate: 48000,
  99.       numberOfChannels: 2,
  100.     };
  101.  
  102.     let supported = false;
  103.  
  104.     try {
  105.       const resV = await VideoDecoder.isConfigSupported(config);
  106.       const resA = await AudioDecoder.isConfigSupported(config);
  107.       if (resV.supported === true || resA.supported === true) {
  108.         supported = true;
  109.       }
  110.     } catch (e) {
  111.       console.warn(e)
  112.     }
  113.  
  114.     __codecs__.set(codec, supported);
  115.  
  116.     return supported;
  117.  
  118.   }
  119.  
  120.   const getCodecResult = (codec) => {
  121.     if (codec.length === 30 && /^av01\.0\.\d\dM\.\d\d\b/.test(`${codec}`)) {
  122.       // av01.0.05M.08.0.110.05.01.06.0
  123.       codec = codec.substring(0, 13);
  124.       // av01.0.05M.08
  125.     }
  126.     let q = __codecs__.get(codec);
  127.     return q;
  128.   }
  129.  
  130.   // reference: https://cobalt.googlesource.com/cobalt/+/refs/tags/24.lts.40/starboard/nplb/media_can_play_mime_and_key_system_test_helpers.h
  131.   // https://cconcolato.github.io/media-mime-support/mediacapabilities.html
  132.  
  133.   if (useCache) {
  134.     console.log('[yt-codecs-hardware-acceleration-only] (init) load from cache')
  135.   } else {
  136.     Promise.all([
  137.       "avc1.420034",
  138.       "hvc1.1.6.L123.00",
  139.       "vp8",
  140.       // "vp09.00.10.08",
  141.       // "av01.0.04M.08",
  142.       "vp09.02.51.10.01.09.16.09.00",
  143.       "vp09.02.51.10.01.09.99.99.00",
  144.       "vp09.02.50.10.01.09.16.09.00",
  145.       "vp09.02.50.10.01.09.99.99.00",
  146.       "vp09.02.41.10.01.09.16.09.00",
  147.       "vp09.02.41.10.01.09.99.99.00",
  148.       "vp09.02.40.10.01.09.16.09.00",
  149.       "vp09.02.40.10.01.09.99.99.00",
  150.       "vp09.02.31.10.01.09.16.09.00",
  151.       "vp09.02.31.10.01.09.99.09.00",
  152.       "vp09.02.30.10.01.09.16.09.00",
  153.       "vp09.02.30.10.01.09.99.09.00",
  154.       "vp09.02.21.10.01.09.16.09.00",
  155.       "vp09.02.21.10.01.09.99.09.00",
  156.       "vp09.02.11.10.01.09.16.09.00",
  157.       "vp09.02.11.10.01.09.99.09.00",
  158.       "vp09.02.10.10.01.09.16.09.00",
  159.       "vp09.02.10.10.01.09.99.09.00",
  160.       "mp4a.40.5",
  161.       "mp4a.40.2",
  162.       "opus",
  163.       "vp9",
  164.       "vp09.00.51.08.01.01.01.01.00",
  165.       "vp09.00.51.08",
  166.       "vp09.00.50.08",
  167.       "vp09.00.41.08",
  168.       "vp09.00.40.08",
  169.       "vp09.00.31.08",
  170.       "vp09.00.30.08",
  171.       "vp09.00.21.08",
  172.       "vp09.00.20.08",
  173.       "vp09.00.11.08",
  174.       "vp09.00.10.08",
  175.       "avc1.640028",
  176.       "avc1.4d401e",
  177.       "avc1.4d4015",
  178.       "avc1.4d400c",
  179.       "avc1.42001E",
  180.       "avc1.4d401f",
  181.       "avc1.64001F",
  182.       "avc1.4d4020",
  183.       "avc1.64002a",
  184.       "avc1.64002A",
  185.       "avc1.4D4020",
  186.       "avc1.4D401F",
  187.       "avc1.4D401E",
  188.       "avc1.4D4015",
  189.       "avc1.4D400C",
  190.       "avc1.4d002a",
  191.       "avc1.4d0028",
  192.       "avc1.6e0034",
  193.  
  194.       "av01.0.00M.08",
  195.       "av01.0.01M.08",
  196.       "av01.0.02M.08",
  197.       "av01.0.03M.08",
  198.       "av01.0.04M.08",
  199.       "av01.0.05M.08",
  200.       "av01.0.06M.08",
  201.       "av01.0.07M.08",
  202.       "av01.0.08M.08",
  203.       "av01.0.09M.08",
  204.       "av01.0.12M.08",
  205.       "av01.0.13M.08",
  206.       "av01.0.14M.08",
  207.       "av01.0.15M.08",
  208.       "av01.0.16M.08",
  209.       "av01.0.17M.08",
  210.       "av01.0.18M.08",
  211.       "av01.0.19M.08",
  212.  
  213.  
  214.       "av01.0.00M.10",
  215.       "av01.0.01M.10",
  216.       "av01.0.02M.10",
  217.       "av01.0.03M.10",
  218.       "av01.0.04M.10",
  219.       "av01.0.05M.10",
  220.       "av01.0.06M.10",
  221.       "av01.0.07M.10",
  222.       "av01.0.08M.10",
  223.       "av01.0.09M.10",
  224.       "av01.0.12M.10",
  225.       "av01.0.13M.10",
  226.       "av01.0.14M.10",
  227.       "av01.0.15M.10",
  228.       "av01.0.16M.10",
  229.       "av01.0.17M.10",
  230.       "av01.0.18M.10",
  231.       "av01.0.19M.10",
  232.  
  233.  
  234.       /*
  235.  
  236.       "av01.0.00M.10.0.110.09.16.09.0",
  237.       "av01.0.01M.10.0.110.09.16.09.0",
  238.       "av01.0.02M.10.0.110.09.16.09.0",
  239.       "av01.0.03M.10.0.110.09.16.09.0",
  240.       "av01.0.04M.10.0.110.09.16.09.0",
  241.       "av01.0.05M.10.0.110.09.16.09.0",
  242.       "av01.0.06M.10.0.110.09.16.09.0",
  243.       "av01.0.07M.10.0.110.09.16.09.0",
  244.       "av01.0.08M.10.0.110.09.16.09.0",
  245.       "av01.0.09M.10.0.110.09.16.09.0",
  246.       "av01.0.12M.10.0.110.09.16.09.0",
  247.       "av01.0.13M.10.0.110.09.16.09.0",
  248.       "av01.0.14M.10.0.110.09.16.09.0",
  249.       "av01.0.15M.10.0.110.09.16.09.0",
  250.       "av01.0.16M.10.0.110.09.16.09.0",
  251.       "av01.0.17M.10.0.110.09.16.09.0",
  252.       "av01.0.18M.10.0.110.09.16.09.0",
  253.       "av01.0.19M.10.0.110.09.16.09.0",
  254.  
  255.  
  256.       "av01.0.00M.08.0.110.05.01.06.0",
  257.       "av01.0.01M.08.0.110.05.01.06.0",
  258.       "av01.0.02M.08.0.110.05.01.06.0",
  259.       "av01.0.03M.08.0.110.05.01.06.0",
  260.       "av01.0.04M.08.0.110.05.01.06.0",
  261.       "av01.0.05M.08.0.110.05.01.06.0",
  262.       "av01.0.06M.08.0.110.05.01.06.0",
  263.       "av01.0.07M.08.0.110.05.01.06.0",
  264.       "av01.0.08M.08.0.110.05.01.06.0",
  265.       "av01.0.09M.08.0.110.05.01.06.0",
  266.       "av01.0.12M.08.0.110.05.01.06.0",
  267.       "av01.0.13M.08.0.110.05.01.06.0",
  268.       "av01.0.14M.08.0.110.05.01.06.0",
  269.       "av01.0.15M.08.0.110.05.01.06.0",
  270.       "av01.0.16M.08.0.110.05.01.06.0",
  271.       "av01.0.17M.08.0.110.05.01.06.0",
  272.       "av01.0.18M.08.0.110.05.01.06.0",
  273.       "av01.0.19M.08.0.110.05.01.06.0",
  274.  
  275.  
  276.       "av01.0.00M.08.0.110.06.01.06.0",
  277.       "av01.0.01M.08.0.110.06.01.06.0",
  278.       "av01.0.02M.08.0.110.06.01.06.0",
  279.       "av01.0.03M.08.0.110.06.01.06.0",
  280.       "av01.0.04M.08.0.110.06.01.06.0",
  281.       "av01.0.05M.08.0.110.06.01.06.0",
  282.       "av01.0.06M.08.0.110.06.01.06.0",
  283.       "av01.0.07M.08.0.110.06.01.06.0",
  284.       "av01.0.08M.08.0.110.06.01.06.0",
  285.       "av01.0.09M.08.0.110.06.01.06.0",
  286.       "av01.0.12M.08.0.110.06.01.06.0",
  287.       "av01.0.13M.08.0.110.06.01.06.0",
  288.       "av01.0.14M.08.0.110.06.01.06.0",
  289.       "av01.0.15M.08.0.110.06.01.06.0",
  290.       "av01.0.16M.08.0.110.06.01.06.0",
  291.       "av01.0.17M.08.0.110.06.01.06.0",
  292.       "av01.0.18M.08.0.110.06.01.06.0",
  293.       "av01.0.19M.08.0.110.06.01.06.0",
  294.  
  295.       */
  296.  
  297.       "av01.0.00M.08",
  298.       "av01.0.00M.10",
  299.       "av01.0.00M.12",
  300.       "av01.0.00H.08",
  301.       "av01.0.00H.10",
  302.       "av01.0.00H.12",
  303.       "av01.0.01M.08",
  304.       "av01.0.01M.10",
  305.       "av01.0.01M.12",
  306.       "av01.0.01H.08",
  307.       "av01.0.01H.10",
  308.       "av01.0.01H.12",
  309.       "av01.0.02M.08",
  310.       "av01.0.02M.10",
  311.       "av01.0.02M.12",
  312.       "av01.0.02H.08",
  313.       "av01.0.02H.10",
  314.       "av01.0.02H.12",
  315.       "av01.0.03M.08",
  316.       "av01.0.03M.10",
  317.       "av01.0.03M.12",
  318.       "av01.0.03H.08",
  319.       "av01.0.03H.10",
  320.       "av01.0.03H.12",
  321.       "av01.0.04M.08",
  322.       "av01.0.04M.10",
  323.       "av01.0.04M.12",
  324.       "av01.0.04H.08",
  325.       "av01.0.04H.10",
  326.       "av01.0.04H.12",
  327.       "av01.0.05M.08",
  328.       "av01.0.05M.10",
  329.       "av01.0.05M.12",
  330.       "av01.0.05H.08",
  331.       "av01.0.05H.10",
  332.       "av01.0.05H.12",
  333.       "av01.0.06M.08",
  334.       "av01.0.06M.10",
  335.       "av01.0.06M.12",
  336.       "av01.0.06H.08",
  337.       "av01.0.06H.10",
  338.       "av01.0.06H.12",
  339.       "av01.0.07M.08",
  340.       "av01.0.07M.10",
  341.       "av01.0.07M.12",
  342.       "av01.0.07H.08",
  343.       "av01.0.07H.10",
  344.       "av01.0.07H.12",
  345.       "av01.0.08M.08",
  346.       "av01.0.08M.10",
  347.       "av01.0.08M.12",
  348.       "av01.0.08H.08",
  349.       "av01.0.08H.10",
  350.       "av01.0.08H.12",
  351.       "av01.0.09M.08",
  352.       "av01.0.09M.10",
  353.       "av01.0.09M.12",
  354.       "av01.0.09H.08",
  355.       "av01.0.09H.10",
  356.       "av01.0.09H.12",
  357.       "av01.0.10M.08",
  358.       "av01.0.10M.10",
  359.       "av01.0.10M.12",
  360.       "av01.0.10H.08",
  361.       "av01.0.10H.10",
  362.       "av01.0.10H.12",
  363.       "av01.0.11M.08",
  364.       "av01.0.11M.10",
  365.       "av01.0.11M.12",
  366.       "av01.0.11H.08",
  367.       "av01.0.11H.10",
  368.       "av01.0.11H.12",
  369.       "av01.0.12M.08",
  370.       "av01.0.12M.10",
  371.       "av01.0.12M.12",
  372.       "av01.0.12H.08",
  373.       "av01.0.12H.10",
  374.       "av01.0.12H.12",
  375.       "av01.0.13M.08",
  376.       "av01.0.13M.10",
  377.       "av01.0.13M.12",
  378.       "av01.0.13H.08",
  379.       "av01.0.13H.10",
  380.       "av01.0.13H.12",
  381.       "av01.0.14M.08",
  382.       "av01.0.14M.10",
  383.       "av01.0.14M.12",
  384.       "av01.0.14H.08",
  385.       "av01.0.14H.10",
  386.       "av01.0.14H.12",
  387.       "av01.0.15M.08",
  388.       "av01.0.15M.10",
  389.       "av01.0.15M.12",
  390.       "av01.0.15H.08",
  391.       "av01.0.15H.10",
  392.       "av01.0.15H.12",
  393.       "av01.0.16M.08",
  394.       "av01.0.16M.10",
  395.       "av01.0.16M.12",
  396.       "av01.0.16H.08",
  397.       "av01.0.16H.10",
  398.       "av01.0.16H.12",
  399.       "av01.0.17M.08",
  400.       "av01.0.17M.10",
  401.       "av01.0.17M.12",
  402.       "av01.0.17H.08",
  403.       "av01.0.17H.10",
  404.       "av01.0.17H.12",
  405.       "av01.0.18M.08",
  406.       "av01.0.18M.10",
  407.       "av01.0.18M.12",
  408.       "av01.0.18H.08",
  409.       "av01.0.18H.10",
  410.       "av01.0.18H.12",
  411.       "av01.0.19M.08",
  412.       "av01.0.19M.10",
  413.       "av01.0.19M.12",
  414.       "av01.0.19H.08",
  415.       "av01.0.19H.10",
  416.       "av01.0.19H.12",
  417.       "av01.0.20M.08",
  418.       "av01.0.20M.10",
  419.       "av01.0.20M.12",
  420.       "av01.0.20H.08",
  421.       "av01.0.20H.10",
  422.       "av01.0.20H.12",
  423.       "av01.0.21M.08",
  424.       "av01.0.21M.10",
  425.       "av01.0.21M.12",
  426.       "av01.0.21H.08",
  427.       "av01.0.21H.10",
  428.       "av01.0.21H.12",
  429.       "av01.0.22M.08",
  430.       "av01.0.22M.10",
  431.       "av01.0.22M.12",
  432.       "av01.0.22H.08",
  433.       "av01.0.22H.10",
  434.       "av01.0.22H.12",
  435.       "av01.0.23M.08",
  436.       "av01.0.23M.10",
  437.       "av01.0.23M.12",
  438.       "av01.0.23H.08",
  439.       "av01.0.23H.10",
  440.       "av01.0.23H.12",
  441.       "av01.0.31M.08",
  442.       "av01.0.31M.10",
  443.       "av01.0.31M.12",
  444.       "av01.0.31H.08",
  445.       "av01.0.31H.10",
  446.       "av01.0.31H.12",
  447.       "av01.1.00M.08",
  448.       "av01.1.00M.10",
  449.       "av01.1.00M.12",
  450.       "av01.1.00H.08",
  451.       "av01.1.00H.10",
  452.       "av01.1.00H.12",
  453.       "av01.1.01M.08",
  454.       "av01.1.01M.10",
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  947.       "avc1.f4101e",
  948.       "avc1.f4101f",
  949.       "avc1.f41020",
  950.       "avc1.f41028",
  951.       "avc1.f41029",
  952.       "avc1.f4102a",
  953.       "avc1.f41032",
  954.       "avc1.f41033",
  955.       "avc1.f41034",
  956.       "avc1.2c000a",
  957.       "avc1.2c000b",
  958.       "avc1.2c000c",
  959.       "avc1.2c000d",
  960.       "avc1.2c0014",
  961.       "avc1.2c0015",
  962.       "avc1.2c0016",
  963.       "avc1.2c001e",
  964.       "avc1.2c001f",
  965.       "avc1.2c0020",
  966.       "avc1.2c0028",
  967.       "avc1.2c0029",
  968.       "avc1.2c002a",
  969.       "avc1.2c0032",
  970.       "avc1.2c0033",
  971.       "avc1.2c0034",
  972.  
  973.       "av01.0.08H.10",
  974.       "hev1.1.6.L93.B0",
  975.       "hev1.2.4.L120.B0",
  976.  
  977.       "avc1.4d400b",
  978.       "mp4v.20.3",
  979.       "avc1.42001E, mp4a.40.2",
  980.       "avc1.64001F, mp4a.40.2",
  981.       "vp9.2",
  982.  
  983.       "av99.0.05M.08",
  984.       "ec-3",
  985.  
  986.       "ac-3",
  987.  
  988.     ].map(testCodec)).then(() => {
  989.  
  990.       try {
  991.         localStorage[storageKey] = JSON.stringify(Object.fromEntries(__codecs__.entries()));
  992.       } catch (e) { }
  993.  
  994.       console.log('[yt-codecs-hardware-acceleration-only] (init) check done')
  995.     }).catch(console.warn);
  996.   }
  997.  
  998.   const supportedFormatsConfig = () => {
  999.  
  1000.     function typeTest(type) {
  1001.  
  1002.       if (typeof type === 'string' && type.startsWith('video/')) {
  1003.         if (useAV1) {
  1004.           if (type.includes('av01')) {
  1005.             if (/codecs[\x20-\x7F]+\bav01\b/.test(type)) return true;
  1006.           } else if (type.includes('av1')) {
  1007.             if (/codecs[\x20-\x7F]+\bav1\b/.test(type)) return true;
  1008.           }
  1009.         }
  1010.       }
  1011.  
  1012.     }
  1013.  
  1014.     // return a custom MIME type checker that can defer to the original function
  1015.     function makeModifiedTypeChecker(origChecker, dx) {
  1016.       // Check if a video type is allowed
  1017.       return function (type) {
  1018.  
  1019.         let m;
  1020.         if (m = /codecs="([^"\r\n]*?)"/.exec(type)) {
  1021.  
  1022.           const codec = m[1];
  1023.           const codecRes = getCodecResult(codec);
  1024.  
  1025.           if (codecRes === false) return "";
  1026.  
  1027.           if (codecRes === undefined) {
  1028.  
  1029.             testCodec(codec);
  1030.  
  1031.             console.warn('[yt-codecs-hardware-acceleration-only] new format', type)
  1032.  
  1033.           }
  1034.  
  1035.         }
  1036.  
  1037.         let res = undefined;
  1038.         if (type === undefined) res = false;
  1039.         else res = typeTest(type);
  1040.         if (res === undefined) res = origChecker.apply(this, arguments);
  1041.         else res = !dx ? res : (res ? "probably" : "");
  1042.  
  1043.         // console.debug(20, type, res)
  1044.  
  1045.         return res;
  1046.       };
  1047.     }
  1048.  
  1049.     // Override video element canPlayType() function
  1050.     const proto = (HTMLVideoElement || 0).prototype;
  1051.     if (proto && typeof proto.canPlayType == 'function') {
  1052.       proto.canPlayType = makeModifiedTypeChecker(proto.canPlayType, true);
  1053.     }
  1054.  
  1055.     // Override media source extension isTypeSupported() function
  1056.     const mse = window.MediaSource;
  1057.     // Check for MSE support before use
  1058.     if (mse && typeof mse.isTypeSupported == 'function') {
  1059.       mse.isTypeSupported = makeModifiedTypeChecker(mse.isTypeSupported);
  1060.     }
  1061.  
  1062.  
  1063.   }
  1064.  
  1065.   function enableAV1() {
  1066.     // This is the setting to force AV1
  1067.     // localStorage['yt-player-av1-pref'] = '8192';
  1068.     try {
  1069.       Object.defineProperty(localStorage.constructor.prototype, 'yt-player-av1-pref', {
  1070.         get() {
  1071.           if (this === localStorage) return '8192';
  1072.           return this.getItem('yt-player-av1-pref');
  1073.         },
  1074.         set(nv) {
  1075.           this.setItem('yt-player-av1-pref', nv);
  1076.           return true;
  1077.         },
  1078.         enumerable: true,
  1079.         configurable: true
  1080.       });
  1081.     } catch (e) {
  1082.       // localStorage['yt-player-av1-pref'] = '8192';
  1083.     }
  1084.     if (localStorage['yt-player-av1-pref'] !== '8192') {
  1085.       console.warn('Use YouTube AV1 is not supported in your browser.');
  1086.       return;
  1087.     }
  1088.     useAV1 = true;
  1089.   }
  1090.  
  1091.   let promise = null;
  1092.  
  1093.   try {
  1094.     promise = navigator.mediaCapabilities.decodingInfo({
  1095.       type: "file",
  1096.       video: {
  1097.         contentType: "video/mp4; codecs=av01.0.05M.08.0.110.05.01.06.0",
  1098.         height: 1080,
  1099.         width: 1920,
  1100.         framerate: 30,
  1101.         bitrate: 2826848,
  1102.       },
  1103.       audio: {
  1104.         contentType: "audio/webm; codecs=opus",
  1105.         channels: "2.1",
  1106.         samplerate: 44100,
  1107.         bitrate: 255236,
  1108.       }
  1109.     });
  1110.   } catch (e) {
  1111.     promise = null;
  1112.   }
  1113.  
  1114.   const msgAV1NotSupported = 'Your browser does not support AV1. You might conside to use the latest version of Google Chrome or Mozilla FireFox.';
  1115.  
  1116.   const callback = (result) => {
  1117.     if (result && result.supported && result.smooth) enableAV1();
  1118.     else {
  1119.       console.warn("yt-codecs-hardware-acceleration-only", msgAV1NotSupported);
  1120.     }
  1121.   };
  1122.  
  1123.   (promise || Promise.resolve(0)).catch(callback).then(callback);
  1124.  
  1125.   supportedFormatsConfig();
  1126.  
  1127. })(Promise);