YouTube Codecs - Hardware Acceleration Only

Use codecs with hardware accleration supported for media playback on YouTube

您需要先安裝使用者腳本管理器擴展,如 TampermonkeyGreasemonkeyViolentmonkey 之後才能安裝該腳本。

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyViolentmonkey 後才能安裝該腳本。

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyViolentmonkey 後才能安裝該腳本。

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyUserscripts 後才能安裝該腳本。

你需要先安裝一款使用者腳本管理器擴展,比如 Tampermonkey,才能安裝此腳本

您需要先安裝使用者腳本管理器擴充功能後才能安裝該腳本。

(我已經安裝了使用者腳本管理器,讓我安裝!)

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

(我已經安裝了使用者樣式管理器,讓我安裝!)

// ==UserScript==
// @name                YouTube Codecs - Hardware Acceleration Only
// @name:zh-TW          YouTube Codecs - Hardware Acceleration Only
// @name:zh-HK          YouTube Codecs - Hardware Acceleration Only
// @name:zh-CN          YouTube Codecs - Hardware Acceleration Only
// @name:ja             YouTube Codecs - Hardware Acceleration Only
// @name:ko             YouTube Codecs - Hardware Acceleration Only
// @name:vi             YouTube Codecs - Hardware Acceleration Only
// @name:de             YouTube Codecs - Hardware Acceleration Only
// @name:fr             YouTube Codecs - Hardware Acceleration Only
// @name:it             YouTube Codecs - Hardware Acceleration Only
// @name:es             YouTube Codecs - Hardware Acceleration Only
// @description         Use codecs with hardware accleration supported for media playback on YouTube
// @description:zh-TW   Use codecs with hardware accleration supported for media playback on YouTube
// @description:zh-HK   Use codecs with hardware accleration supported for media playback on YouTube
// @description:zh-CN   Use codecs with hardware accleration supported for media playback on YouTube
// @description:ja      Use codecs with hardware accleration supported for media playback on YouTube
// @description:ko      Use codecs with hardware accleration supported for media playback on YouTube
// @description:vi      Use codecs with hardware accleration supported for media playback on YouTube
// @description:de      Use codecs with hardware accleration supported for media playback on YouTube
// @description:fr      Use codecs with hardware accleration supported for media playback on YouTubee
// @description:it      Use codecs with hardware accleration supported for media playback on YouTube
// @description:es      Use codecs with hardware accleration supported for media playback on YouTube
// @namespace           http://tampermonkey.net/
// @version             0.0.2
// @author              CY Fung
// @match               https://www.youtube.com/*
// @match               https://www.youtube.com/embed/*
// @match               https://www.youtube-nocookie.com/embed/*
// @exclude             https://www.youtube.com/live_chat*
// @exclude             https://www.youtube.com/live_chat_replay*
// @exclude             /^https?://\S+\.(txt|png|jpg|jpeg|gif|xml|svg|manifest|log|ini)[^\/]*$/
// @icon                https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @grant               none
// @run-at              document-start
// @license             MIT
//
// @compatible          firefox Violentmonkey
// @compatible          firefox Tampermonkey
// @compatible          firefox FireMonkey
// @compatible          chrome Violentmonkey
// @compatible          chrome Tampermonkey
// @compatible          opera Violentmonkey
// @compatible          opera Tampermonkey
// @compatible          safari Stay
// @compatible          edge Violentmonkey
// @compatible          edge Tampermonkey
// @compatible          brave Violentmonkey
// @compatible          brave Tampermonkey
//
// @unwrap
// @allFrames           true
// @inject-into         page
// ==/UserScript==

(function (__Promise__) {
  'use strict';

  /** @type {globalThis.PromiseConstructor} */
  const Promise = (async () => { })().constructor; // YouTube hacks Promise in WaterFox Classic and "Promise.resolve(0)" nevers resolve.

  if (typeof VideoEncoder !== 'function' || typeof VideoEncoder.isConfigSupported !== 'function') {
    console.error('VideoEncoder.isConfigSupported is not supported');
    return;
  }

  const storageKey = '__codecs_vvgZHhgVKfAlY0__';
  let useCache = false;
  let useAV1 = false;
  const getMap = () => {
    const v = localStorage[storageKey]
    if (v) {
      try {
        const obj = JSON.parse(v);
        const resMap = new Map(Object.entries(obj));
        useCache = true;
        return resMap;
      } catch (e) { }
    }
    return new Map();
  }

  const objectKey = '__codecs_qyg8YVnvXJZ9E5__';

  const __codecs__ = window[objectKey] || (window[objectKey] = getMap());

  const testCodec = async (codec) => {

    if (!codec) return null;

    if (__codecs__.has(codec)) return __codecs__.get(codec);

    __codecs__.set(codec, null);

    const config = {
      codec: codec,
      hardwareAcceleration: 'prefer-hardware',
      width: 1920,
      height: 1080,
      bitrate: 12_000_000,
      bitrateMode: "variable",
      framerate: 60,
      sampleRate: 48000,
      numberOfChannels: 2,
    };

    let supported = false;

    try {
      const resV = await VideoDecoder.isConfigSupported(config);
      const resA = await AudioDecoder.isConfigSupported(config);
      if (resV.supported === true || resA.supported === true) {
        supported = true;
      }
    } catch (e) {
      console.warn(e)
    }

    __codecs__.set(codec, supported);

    return supported;

  }

  const getCodecResult = (codec) => {
    if (codec.length === 30 && /^av01\.0\.\d\dM\.\d\d\b/.test(`${codec}`)) {
      // av01.0.05M.08.0.110.05.01.06.0
      codec = codec.substring(0, 13);
      // av01.0.05M.08
    }
    let q = __codecs__.get(codec);
    return q;
  }

  // reference: https://cobalt.googlesource.com/cobalt/+/refs/tags/24.lts.40/starboard/nplb/media_can_play_mime_and_key_system_test_helpers.h
  // https://cconcolato.github.io/media-mime-support/mediacapabilities.html

  if (useCache) {
    console.log('[yt-codecs-hardware-acceleration-only] (init) load from cache')
  } else {
    Promise.all([
      "avc1.420034",
      "hvc1.1.6.L123.00",
      "vp8",
      // "vp09.00.10.08",
      // "av01.0.04M.08",
      "vp09.02.51.10.01.09.16.09.00",
      "vp09.02.51.10.01.09.99.99.00",
      "vp09.02.50.10.01.09.16.09.00",
      "vp09.02.50.10.01.09.99.99.00",
      "vp09.02.41.10.01.09.16.09.00",
      "vp09.02.41.10.01.09.99.99.00",
      "vp09.02.40.10.01.09.16.09.00",
      "vp09.02.40.10.01.09.99.99.00",
      "vp09.02.31.10.01.09.16.09.00",
      "vp09.02.31.10.01.09.99.09.00",
      "vp09.02.30.10.01.09.16.09.00",
      "vp09.02.30.10.01.09.99.09.00",
      "vp09.02.21.10.01.09.16.09.00",
      "vp09.02.21.10.01.09.99.09.00",
      "vp09.02.11.10.01.09.16.09.00",
      "vp09.02.11.10.01.09.99.09.00",
      "vp09.02.10.10.01.09.16.09.00",
      "vp09.02.10.10.01.09.99.09.00",
      "mp4a.40.5",
      "mp4a.40.2",
      "opus",
      "vp9",
      "vp09.00.51.08.01.01.01.01.00",
      "vp09.00.51.08",
      "vp09.00.50.08",
      "vp09.00.41.08",
      "vp09.00.40.08",
      "vp09.00.31.08",
      "vp09.00.30.08",
      "vp09.00.21.08",
      "vp09.00.20.08",
      "vp09.00.11.08",
      "vp09.00.10.08",
      "avc1.640028",
      "avc1.4d401e",
      "avc1.4d4015",
      "avc1.4d400c",
      "avc1.42001E",
      "avc1.4d401f",
      "avc1.64001F",
      "avc1.4d4020",
      "avc1.64002a",
      "avc1.64002A",
      "avc1.4D4020",
      "avc1.4D401F",
      "avc1.4D401E",
      "avc1.4D4015",
      "avc1.4D400C",
      "avc1.4d002a",
      "avc1.4d0028",
      "avc1.6e0034",

      "av01.0.00M.08",
      "av01.0.01M.08",
      "av01.0.02M.08",
      "av01.0.03M.08",
      "av01.0.04M.08",
      "av01.0.05M.08",
      "av01.0.06M.08",
      "av01.0.07M.08",
      "av01.0.08M.08",
      "av01.0.09M.08",
      "av01.0.12M.08",
      "av01.0.13M.08",
      "av01.0.14M.08",
      "av01.0.15M.08",
      "av01.0.16M.08",
      "av01.0.17M.08",
      "av01.0.18M.08",
      "av01.0.19M.08",


      "av01.0.00M.10",
      "av01.0.01M.10",
      "av01.0.02M.10",
      "av01.0.03M.10",
      "av01.0.04M.10",
      "av01.0.05M.10",
      "av01.0.06M.10",
      "av01.0.07M.10",
      "av01.0.08M.10",
      "av01.0.09M.10",
      "av01.0.12M.10",
      "av01.0.13M.10",
      "av01.0.14M.10",
      "av01.0.15M.10",
      "av01.0.16M.10",
      "av01.0.17M.10",
      "av01.0.18M.10",
      "av01.0.19M.10",


      /*

      "av01.0.00M.10.0.110.09.16.09.0",
      "av01.0.01M.10.0.110.09.16.09.0",
      "av01.0.02M.10.0.110.09.16.09.0",
      "av01.0.03M.10.0.110.09.16.09.0",
      "av01.0.04M.10.0.110.09.16.09.0",
      "av01.0.05M.10.0.110.09.16.09.0",
      "av01.0.06M.10.0.110.09.16.09.0",
      "av01.0.07M.10.0.110.09.16.09.0",
      "av01.0.08M.10.0.110.09.16.09.0",
      "av01.0.09M.10.0.110.09.16.09.0",
      "av01.0.12M.10.0.110.09.16.09.0",
      "av01.0.13M.10.0.110.09.16.09.0",
      "av01.0.14M.10.0.110.09.16.09.0",
      "av01.0.15M.10.0.110.09.16.09.0",
      "av01.0.16M.10.0.110.09.16.09.0",
      "av01.0.17M.10.0.110.09.16.09.0",
      "av01.0.18M.10.0.110.09.16.09.0",
      "av01.0.19M.10.0.110.09.16.09.0",


      "av01.0.00M.08.0.110.05.01.06.0",
      "av01.0.01M.08.0.110.05.01.06.0",
      "av01.0.02M.08.0.110.05.01.06.0",
      "av01.0.03M.08.0.110.05.01.06.0",
      "av01.0.04M.08.0.110.05.01.06.0",
      "av01.0.05M.08.0.110.05.01.06.0",
      "av01.0.06M.08.0.110.05.01.06.0",
      "av01.0.07M.08.0.110.05.01.06.0",
      "av01.0.08M.08.0.110.05.01.06.0",
      "av01.0.09M.08.0.110.05.01.06.0",
      "av01.0.12M.08.0.110.05.01.06.0",
      "av01.0.13M.08.0.110.05.01.06.0",
      "av01.0.14M.08.0.110.05.01.06.0",
      "av01.0.15M.08.0.110.05.01.06.0",
      "av01.0.16M.08.0.110.05.01.06.0",
      "av01.0.17M.08.0.110.05.01.06.0",
      "av01.0.18M.08.0.110.05.01.06.0",
      "av01.0.19M.08.0.110.05.01.06.0",


      "av01.0.00M.08.0.110.06.01.06.0",
      "av01.0.01M.08.0.110.06.01.06.0",
      "av01.0.02M.08.0.110.06.01.06.0",
      "av01.0.03M.08.0.110.06.01.06.0",
      "av01.0.04M.08.0.110.06.01.06.0",
      "av01.0.05M.08.0.110.06.01.06.0",
      "av01.0.06M.08.0.110.06.01.06.0",
      "av01.0.07M.08.0.110.06.01.06.0",
      "av01.0.08M.08.0.110.06.01.06.0",
      "av01.0.09M.08.0.110.06.01.06.0",
      "av01.0.12M.08.0.110.06.01.06.0",
      "av01.0.13M.08.0.110.06.01.06.0",
      "av01.0.14M.08.0.110.06.01.06.0",
      "av01.0.15M.08.0.110.06.01.06.0",
      "av01.0.16M.08.0.110.06.01.06.0",
      "av01.0.17M.08.0.110.06.01.06.0",
      "av01.0.18M.08.0.110.06.01.06.0",
      "av01.0.19M.08.0.110.06.01.06.0",

      */

      "av01.0.00M.08",
      "av01.0.00M.10",
      "av01.0.00M.12",
      "av01.0.00H.08",
      "av01.0.00H.10",
      "av01.0.00H.12",
      "av01.0.01M.08",
      "av01.0.01M.10",
      "av01.0.01M.12",
      "av01.0.01H.08",
      "av01.0.01H.10",
      "av01.0.01H.12",
      "av01.0.02M.08",
      "av01.0.02M.10",
      "av01.0.02M.12",
      "av01.0.02H.08",
      "av01.0.02H.10",
      "av01.0.02H.12",
      "av01.0.03M.08",
      "av01.0.03M.10",
      "av01.0.03M.12",
      "av01.0.03H.08",
      "av01.0.03H.10",
      "av01.0.03H.12",
      "av01.0.04M.08",
      "av01.0.04M.10",
      "av01.0.04M.12",
      "av01.0.04H.08",
      "av01.0.04H.10",
      "av01.0.04H.12",
      "av01.0.05M.08",
      "av01.0.05M.10",
      "av01.0.05M.12",
      "av01.0.05H.08",
      "av01.0.05H.10",
      "av01.0.05H.12",
      "av01.0.06M.08",
      "av01.0.06M.10",
      "av01.0.06M.12",
      "av01.0.06H.08",
      "av01.0.06H.10",
      "av01.0.06H.12",
      "av01.0.07M.08",
      "av01.0.07M.10",
      "av01.0.07M.12",
      "av01.0.07H.08",
      "av01.0.07H.10",
      "av01.0.07H.12",
      "av01.0.08M.08",
      "av01.0.08M.10",
      "av01.0.08M.12",
      "av01.0.08H.08",
      "av01.0.08H.10",
      "av01.0.08H.12",
      "av01.0.09M.08",
      "av01.0.09M.10",
      "av01.0.09M.12",
      "av01.0.09H.08",
      "av01.0.09H.10",
      "av01.0.09H.12",
      "av01.0.10M.08",
      "av01.0.10M.10",
      "av01.0.10M.12",
      "av01.0.10H.08",
      "av01.0.10H.10",
      "av01.0.10H.12",
      "av01.0.11M.08",
      "av01.0.11M.10",
      "av01.0.11M.12",
      "av01.0.11H.08",
      "av01.0.11H.10",
      "av01.0.11H.12",
      "av01.0.12M.08",
      "av01.0.12M.10",
      "av01.0.12M.12",
      "av01.0.12H.08",
      "av01.0.12H.10",
      "av01.0.12H.12",
      "av01.0.13M.08",
      "av01.0.13M.10",
      "av01.0.13M.12",
      "av01.0.13H.08",
      "av01.0.13H.10",
      "av01.0.13H.12",
      "av01.0.14M.08",
      "av01.0.14M.10",
      "av01.0.14M.12",
      "av01.0.14H.08",
      "av01.0.14H.10",
      "av01.0.14H.12",
      "av01.0.15M.08",
      "av01.0.15M.10",
      "av01.0.15M.12",
      "av01.0.15H.08",
      "av01.0.15H.10",
      "av01.0.15H.12",
      "av01.0.16M.08",
      "av01.0.16M.10",
      "av01.0.16M.12",
      "av01.0.16H.08",
      "av01.0.16H.10",
      "av01.0.16H.12",
      "av01.0.17M.08",
      "av01.0.17M.10",
      "av01.0.17M.12",
      "av01.0.17H.08",
      "av01.0.17H.10",
      "av01.0.17H.12",
      "av01.0.18M.08",
      "av01.0.18M.10",
      "av01.0.18M.12",
      "av01.0.18H.08",
      "av01.0.18H.10",
      "av01.0.18H.12",
      "av01.0.19M.08",
      "av01.0.19M.10",
      "av01.0.19M.12",
      "av01.0.19H.08",
      "av01.0.19H.10",
      "av01.0.19H.12",
      "av01.0.20M.08",
      "av01.0.20M.10",
      "av01.0.20M.12",
      "av01.0.20H.08",
      "av01.0.20H.10",
      "av01.0.20H.12",
      "av01.0.21M.08",
      "av01.0.21M.10",
      "av01.0.21M.12",
      "av01.0.21H.08",
      "av01.0.21H.10",
      "av01.0.21H.12",
      "av01.0.22M.08",
      "av01.0.22M.10",
      "av01.0.22M.12",
      "av01.0.22H.08",
      "av01.0.22H.10",
      "av01.0.22H.12",
      "av01.0.23M.08",
      "av01.0.23M.10",
      "av01.0.23M.12",
      "av01.0.23H.08",
      "av01.0.23H.10",
      "av01.0.23H.12",
      "av01.0.31M.08",
      "av01.0.31M.10",
      "av01.0.31M.12",
      "av01.0.31H.08",
      "av01.0.31H.10",
      "av01.0.31H.12",
      "av01.1.00M.08",
      "av01.1.00M.10",
      "av01.1.00M.12",
      "av01.1.00H.08",
      "av01.1.00H.10",
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      "av01.1.01M.08",
      "av01.1.01M.10",
      "av01.1.01M.12",
      "av01.1.01H.08",
      "av01.1.01H.10",
      "av01.1.01H.12",
      "av01.1.02M.08",
      "av01.1.02M.10",
      "av01.1.02M.12",
      "av01.1.02H.08",
      "av01.1.02H.10",
      "av01.1.02H.12",
      "av01.1.03M.08",
      "av01.1.03M.10",
      "av01.1.03M.12",
      "av01.1.03H.08",
      "av01.1.03H.10",
      "av01.1.03H.12",
      "av01.1.04M.08",
      "av01.1.04M.10",
      "av01.1.04M.12",
      "av01.1.04H.08",
      "av01.1.04H.10",
      "av01.1.04H.12",
      "av01.1.05M.08",
      "av01.1.05M.10",
      "av01.1.05M.12",
      "av01.1.05H.08",
      "av01.1.05H.10",
      "av01.1.05H.12",
      "av01.1.06M.08",
      "av01.1.06M.10",
      "av01.1.06M.12",
      "av01.1.06H.08",
      "av01.1.06H.10",
      "av01.1.06H.12",
      "av01.1.07M.08",
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      "av01.1.07M.12",
      "av01.1.07H.08",
      "av01.1.07H.10",
      "av01.1.07H.12",
      "av01.1.08M.08",
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      "av01.1.10H.08",
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      "av01.1.11M.08",
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      "av01.1.11M.12",
      "av01.1.11H.08",
      "av01.1.11H.10",
      "av01.1.11H.12",
      "av01.1.12M.08",
      "av01.1.12M.10",
      "av01.1.12M.12",
      "av01.1.12H.08",
      "av01.1.12H.10",
      "av01.1.12H.12",
      "av01.1.13M.08",
      "av01.1.13M.10",
      "av01.1.13M.12",
      "av01.1.13H.08",
      "av01.1.13H.10",
      "av01.1.13H.12",
      "av01.1.14M.08",
      "av01.1.14M.10",
      "av01.1.14M.12",
      "av01.1.14H.08",
      "av01.1.14H.10",
      "av01.1.14H.12",
      "av01.1.15M.08",
      "av01.1.15M.10",
      "av01.1.15M.12",
      "av01.1.15H.08",
      "av01.1.15H.10",
      "av01.1.15H.12",
      "av01.1.16M.08",
      "av01.1.16M.10",
      "av01.1.16M.12",
      "av01.1.16H.08",
      "av01.1.16H.10",
      "av01.1.16H.12",
      "av01.1.17M.08",
      "av01.1.17M.10",
      "av01.1.17M.12",
      "av01.1.17H.08",
      "av01.1.17H.10",
      "av01.1.17H.12",
      "av01.1.18M.08",
      "av01.1.18M.10",
      "av01.1.18M.12",
      "av01.1.18H.08",
      "av01.1.18H.10",
      "av01.1.18H.12",
      "av01.1.19M.08",
      "av01.1.19M.10",
      "av01.1.19M.12",
      "av01.1.19H.08",
      "av01.1.19H.10",
      "av01.1.19H.12",
      "av01.1.20M.08",
      "av01.1.20M.10",
      "av01.1.20M.12",
      "av01.1.20H.08",
      "av01.1.20H.10",
      "av01.1.20H.12",
      "av01.1.21M.08",
      "av01.1.21M.10",
      "av01.1.21M.12",
      "av01.1.21H.08",
      "av01.1.21H.10",
      "av01.1.21H.12",
      "av01.1.22M.08",
      "av01.1.22M.10",
      "av01.1.22M.12",
      "av01.1.22H.08",
      "av01.1.22H.10",
      "av01.1.22H.12",
      "av01.1.23M.08",
      "av01.1.23M.10",
      "av01.1.23M.12",
      "av01.1.23H.08",
      "av01.1.23H.10",
      "av01.1.23H.12",
      "av01.1.31M.08",
      "av01.1.31M.10",
      "av01.1.31M.12",
      "av01.1.31H.08",
      "av01.1.31H.10",
      "av01.1.31H.12",
      "av01.2.00M.08",
      "av01.2.00M.10",
      "av01.2.00M.12",
      "av01.2.00H.08",
      "av01.2.00H.10",
      "av01.2.00H.12",
      "av01.2.01M.08",
      "av01.2.01M.10",
      "av01.2.01M.12",
      "av01.2.01H.08",
      "av01.2.01H.10",
      "av01.2.01H.12",
      "av01.2.02M.08",
      "av01.2.02M.10",
      "av01.2.02M.12",
      "av01.2.02H.08",
      "av01.2.02H.10",
      "av01.2.02H.12",
      "av01.2.03M.08",
      "av01.2.03M.10",
      "av01.2.03M.12",
      "av01.2.03H.08",
      "av01.2.03H.10",
      "av01.2.03H.12",
      "av01.2.04M.08",
      "av01.2.04M.10",
      "av01.2.04M.12",
      "av01.2.04H.08",
      "av01.2.04H.10",
      "av01.2.04H.12",
      "av01.2.05M.08",
      "av01.2.05M.10",
      "av01.2.05M.12",
      "av01.2.05H.08",
      "av01.2.05H.10",
      "av01.2.05H.12",
      "av01.2.06M.08",
      "av01.2.06M.10",
      "av01.2.06M.12",
      "av01.2.06H.08",
      "av01.2.06H.10",
      "av01.2.06H.12",
      "av01.2.07M.08",
      "av01.2.07M.10",
      "av01.2.07M.12",
      "av01.2.07H.08",
      "av01.2.07H.10",
      "av01.2.07H.12",
      "av01.2.08M.08",
      "av01.2.08M.10",
      "av01.2.08M.12",
      "av01.2.08H.08",
      "av01.2.08H.10",
      "av01.2.08H.12",
      "av01.2.09M.08",
      "av01.2.09M.10",
      "av01.2.09M.12",
      "av01.2.09H.08",
      "av01.2.09H.10",
      "av01.2.09H.12",
      "av01.2.10M.08",
      "av01.2.10M.10",
      "av01.2.10M.12",
      "av01.2.10H.08",
      "av01.2.10H.10",
      "av01.2.10H.12",
      "av01.2.11M.08",
      "av01.2.11M.10",
      "av01.2.11M.12",
      "av01.2.11H.08",
      "av01.2.11H.10",
      "av01.2.11H.12",
      "av01.2.12M.08",
      "av01.2.12M.10",
      "av01.2.12M.12",
      "av01.2.12H.08",
      "av01.2.12H.10",
      "av01.2.12H.12",
      "av01.2.13M.08",
      "av01.2.13M.10",
      "av01.2.13M.12",
      "av01.2.13H.08",
      "av01.2.13H.10",
      "av01.2.13H.12",
      "av01.2.14M.08",
      "av01.2.14M.10",
      "av01.2.14M.12",
      "av01.2.14H.08",
      "av01.2.14H.10",
      "av01.2.14H.12",
      "av01.2.15M.08",
      "av01.2.15M.10",
      "av01.2.15M.12",
      "av01.2.15H.08",
      "av01.2.15H.10",
      "av01.2.15H.12",
      "av01.2.16M.08",
      "av01.2.16M.10",
      "av01.2.16M.12",
      "av01.2.16H.08",
      "av01.2.16H.10",
      "av01.2.16H.12",
      "av01.2.17M.08",
      "av01.2.17M.10",
      "av01.2.17M.12",
      "av01.2.17H.08",
      "av01.2.17H.10",
      "av01.2.17H.12",
      "av01.2.18M.08",
      "av01.2.18M.10",
      "av01.2.18M.12",
      "av01.2.18H.08",
      "av01.2.18H.10",
      "av01.2.18H.12",
      "av01.2.19M.08",
      "av01.2.19M.10",
      "av01.2.19M.12",
      "av01.2.19H.08",
      "av01.2.19H.10",
      "av01.2.19H.12",
      "av01.2.20M.08",
      "av01.2.20M.10",
      "av01.2.20M.12",
      "av01.2.20H.08",
      "av01.2.20H.10",
      "av01.2.20H.12",
      "av01.2.21M.08",
      "av01.2.21M.10",
      "av01.2.21M.12",
      "av01.2.21H.08",
      "av01.2.21H.10",
      "av01.2.21H.12",
      "av01.2.22M.08",
      "av01.2.22M.10",
      "av01.2.22M.12",
      "av01.2.22H.08",
      "av01.2.22H.10",
      "av01.2.22H.12",
      "av01.2.23M.08",
      "av01.2.23M.10",
      "av01.2.23M.12",
      "av01.2.23H.08",
      "av01.2.23H.10",
      "av01.2.23H.12",
      "av01.2.31M.08",
      "av01.2.31M.10",
      "av01.2.31M.12",
      "av01.2.31H.08",
      "av01.2.31H.10",
      "av01.2.31H.12",

      "avc1.42000a",
      "avc1.42000b",
      "avc1.42000c",
      "avc1.42000d",
      "avc1.420014",
      "avc1.420015",
      "avc1.420016",
      "avc1.42001e",
      "avc1.42001f",
      "avc1.420020",
      "avc1.420028",
      "avc1.420029",
      "avc1.42002a",
      "avc1.420032",
      "avc1.420033",
      "avc1.420034",
      "avc1.42400a",
      "avc1.42400b",
      "avc1.42400c",
      "avc1.42400d",
      "avc1.424014",
      "avc1.424015",
      "avc1.424016",
      "avc1.42401e",
      "avc1.42401f",
      "avc1.424020",
      "avc1.424028",
      "avc1.424029",
      "avc1.42402a",
      "avc1.424032",
      "avc1.424033",
      "avc1.424034",
      "avc1.4d000a",
      "avc1.4d000b",
      "avc1.4d000c",
      "avc1.4d000d",
      "avc1.4d0014",
      "avc1.4d0015",
      "avc1.4d0016",
      "avc1.4d001e",
      "avc1.4d001f",
      "avc1.4d0020",
      "avc1.4d0028",
      "avc1.4d0029",
      "avc1.4d002a",
      "avc1.4d0032",
      "avc1.4d0033",
      "avc1.4d0034",
      "avc1.4d400a",
      "avc1.4d400b",
      "avc1.4d400c",
      "avc1.4d400d",
      "avc1.4d4014",
      "avc1.4d4015",
      "avc1.4d4016",
      "avc1.4d401e",
      "avc1.4d401f",
      "avc1.4d4020",
      "avc1.4d4028",
      "avc1.4d4029",
      "avc1.4d402a",
      "avc1.4d4032",
      "avc1.4d4033",
      "avc1.4d4034",
      "avc1.58000a",
      "avc1.58000b",
      "avc1.58000c",
      "avc1.58000d",
      "avc1.580014",
      "avc1.580015",
      "avc1.580016",
      "avc1.58001e",
      "avc1.58001f",
      "avc1.580020",
      "avc1.580028",
      "avc1.580029",
      "avc1.58002a",
      "avc1.580032",
      "avc1.580033",
      "avc1.580034",
      "avc1.64000a",
      "avc1.64000b",
      "avc1.64000c",
      "avc1.64000d",
      "avc1.640014",
      "avc1.640015",
      "avc1.640016",
      "avc1.64001e",
      "avc1.64001f",
      "avc1.640020",
      "avc1.640028",
      "avc1.640029",
      "avc1.64002a",
      "avc1.640032",
      "avc1.640033",
      "avc1.640034",
      "avc1.64080a",
      "avc1.64080b",
      "avc1.64080c",
      "avc1.64080d",
      "avc1.640814",
      "avc1.640815",
      "avc1.640816",
      "avc1.64081e",
      "avc1.64081f",
      "avc1.640820",
      "avc1.640828",
      "avc1.640829",
      "avc1.64082a",
      "avc1.640832",
      "avc1.640833",
      "avc1.640834",
      "avc1.6e000a",
      "avc1.6e000b",
      "avc1.6e000c",
      "avc1.6e000d",
      "avc1.6e0014",
      "avc1.6e0015",
      "avc1.6e0016",
      "avc1.6e001e",
      "avc1.6e001f",
      "avc1.6e0020",
      "avc1.6e0028",
      "avc1.6e0029",
      "avc1.6e002a",
      "avc1.6e0032",
      "avc1.6e0033",
      "avc1.6e0034",
      "avc1.6e100a",
      "avc1.6e100b",
      "avc1.6e100c",
      "avc1.6e100d",
      "avc1.6e1014",
      "avc1.6e1015",
      "avc1.6e1016",
      "avc1.6e101e",
      "avc1.6e101f",
      "avc1.6e1020",
      "avc1.6e1028",
      "avc1.6e1029",
      "avc1.6e102a",
      "avc1.6e1032",
      "avc1.6e1033",
      "avc1.6e1034",
      "avc1.7a000a",
      "avc1.7a000b",
      "avc1.7a000c",
      "avc1.7a000d",
      "avc1.7a0014",
      "avc1.7a0015",
      "avc1.7a0016",
      "avc1.7a001e",
      "avc1.7a001f",
      "avc1.7a0020",
      "avc1.7a0028",
      "avc1.7a0029",
      "avc1.7a002a",
      "avc1.7a0032",
      "avc1.7a0033",
      "avc1.7a0034",
      "avc1.7a100a",
      "avc1.7a100b",
      "avc1.7a100c",
      "avc1.7a100d",
      "avc1.7a1014",
      "avc1.7a1015",
      "avc1.7a1016",
      "avc1.7a101e",
      "avc1.7a101f",
      "avc1.7a1020",
      "avc1.7a1028",
      "avc1.7a1029",
      "avc1.7a102a",
      "avc1.7a1032",
      "avc1.7a1033",
      "avc1.7a1034",
      "avc1.f4000a",
      "avc1.f4000b",
      "avc1.f4000c",
      "avc1.f4000d",
      "avc1.f40014",
      "avc1.f40015",
      "avc1.f40016",
      "avc1.f4001e",
      "avc1.f4001f",
      "avc1.f40020",
      "avc1.f40028",
      "avc1.f40029",
      "avc1.f4002a",
      "avc1.f40032",
      "avc1.f40033",
      "avc1.f40034",
      "avc1.f4100a",
      "avc1.f4100b",
      "avc1.f4100c",
      "avc1.f4100d",
      "avc1.f41014",
      "avc1.f41015",
      "avc1.f41016",
      "avc1.f4101e",
      "avc1.f4101f",
      "avc1.f41020",
      "avc1.f41028",
      "avc1.f41029",
      "avc1.f4102a",
      "avc1.f41032",
      "avc1.f41033",
      "avc1.f41034",
      "avc1.2c000a",
      "avc1.2c000b",
      "avc1.2c000c",
      "avc1.2c000d",
      "avc1.2c0014",
      "avc1.2c0015",
      "avc1.2c0016",
      "avc1.2c001e",
      "avc1.2c001f",
      "avc1.2c0020",
      "avc1.2c0028",
      "avc1.2c0029",
      "avc1.2c002a",
      "avc1.2c0032",
      "avc1.2c0033",
      "avc1.2c0034",

      "av01.0.08H.10",
      "hev1.1.6.L93.B0",
      "hev1.2.4.L120.B0",

      "avc1.4d400b",
      "mp4v.20.3",
      "avc1.42001E, mp4a.40.2",
      "avc1.64001F, mp4a.40.2",
      "vp9.2",

      "av99.0.05M.08",
      "ec-3",

      "ac-3",

    ].map(testCodec)).then(() => {

      try {
        localStorage[storageKey] = JSON.stringify(Object.fromEntries(__codecs__.entries()));
      } catch (e) { }

      console.log('[yt-codecs-hardware-acceleration-only] (init) check done')
    }).catch(console.warn);
  }

  const supportedFormatsConfig = () => {

    function typeTest(type) {

      if (typeof type === 'string' && type.startsWith('video/')) {
        if (useAV1) {
          if (type.includes('av01')) {
            if (/codecs[\x20-\x7F]+\bav01\b/.test(type)) return true;
          } else if (type.includes('av1')) {
            if (/codecs[\x20-\x7F]+\bav1\b/.test(type)) return true;
          }
        }
      }

    }

    // return a custom MIME type checker that can defer to the original function
    function makeModifiedTypeChecker(origChecker, dx) {
      // Check if a video type is allowed
      return function (type) {

        let m;
        if (m = /codecs="([^"\r\n]*?)"/.exec(type)) {

          const codec = m[1];
          const codecRes = getCodecResult(codec);

          if (codecRes === false) return "";

          if (codecRes === undefined) {

            testCodec(codec);

            console.warn('[yt-codecs-hardware-acceleration-only] new format', type)

          }

        }

        let res = undefined;
        if (type === undefined) res = false;
        else res = typeTest(type);
        if (res === undefined) res = origChecker.apply(this, arguments);
        else res = !dx ? res : (res ? "probably" : "");

        // console.debug(20, type, res)

        return res;
      };
    }

    // Override video element canPlayType() function
    const proto = (HTMLVideoElement || 0).prototype;
    if (proto && typeof proto.canPlayType == 'function') {
      proto.canPlayType = makeModifiedTypeChecker(proto.canPlayType, true);
    }

    // Override media source extension isTypeSupported() function
    const mse = window.MediaSource;
    // Check for MSE support before use
    if (mse && typeof mse.isTypeSupported == 'function') {
      mse.isTypeSupported = makeModifiedTypeChecker(mse.isTypeSupported);
    }


  }

  function enableAV1() {
    // This is the setting to force AV1
    // localStorage['yt-player-av1-pref'] = '8192';
    try {
      Object.defineProperty(localStorage.constructor.prototype, 'yt-player-av1-pref', {
        get() {
          if (this === localStorage) return '8192';
          return this.getItem('yt-player-av1-pref');
        },
        set(nv) {
          this.setItem('yt-player-av1-pref', nv);
          return true;
        },
        enumerable: true,
        configurable: true
      });
    } catch (e) {
      // localStorage['yt-player-av1-pref'] = '8192';
    }
    if (localStorage['yt-player-av1-pref'] !== '8192') {
      console.warn('Use YouTube AV1 is not supported in your browser.');
      return;
    }
    useAV1 = true;
  }

  let promise = null;

  try {
    promise = navigator.mediaCapabilities.decodingInfo({
      type: "file",
      video: {
        contentType: "video/mp4; codecs=av01.0.05M.08.0.110.05.01.06.0",
        height: 1080,
        width: 1920,
        framerate: 30,
        bitrate: 2826848,
      },
      audio: {
        contentType: "audio/webm; codecs=opus",
        channels: "2.1",
        samplerate: 44100,
        bitrate: 255236,
      }
    });
  } catch (e) {
    promise = null;
  }

  const msgAV1NotSupported = 'Your browser does not support AV1. You might conside to use the latest version of Google Chrome or Mozilla FireFox.';

  const callback = (result) => {
    if (result && result.supported && result.smooth) enableAV1();
    else {
      console.warn("yt-codecs-hardware-acceleration-only", msgAV1NotSupported);
    }
  };

  (promise || Promise.resolve(0)).catch(callback).then(callback);

  supportedFormatsConfig();

})(Promise);