使用 AV1 进行 YouTube 视频播放
当前为
// ==UserScript==
// @name Use YouTube AV1
// @description Use AV1 for video playback on YouTube
// @name:zh-TW 使用 YouTube AV1
// @description:zh-TW 使用 AV1 進行 YouTube 影片播放
// @name:zh-HK 使用 YouTube AV1
// @description:zh-HK 使用 AV1 進行 YouTube 影片播放
// @name:zh-CN 使用 YouTube AV1
// @description:zh-CN 使用 AV1 进行 YouTube 视频播放
// @name:ja YouTube AV1 の使用
// @description:ja YouTube の動画再生に AV1 を使用する
// @name:ko YouTube AV1 사용
// @description:ko YouTube의 동영상 재생에 AV1을 사용하기
// @name:vi Sử dụng YouTube AV1
// @description:vi Sử dụng AV1 để phát video trên YouTube
// @name:de YouTube AV1 verwenden
// @description:de Verwende AV1 für die Videowiedergabe auf YouTube
// @name:fr Utiliser YouTube AV1
// @description:fr Utiliser AV1 pour la lecture des vidéos sur YouTube
// @name:it Usa YouTube AV1
// @description:it Usa AV1 per la riproduzione dei video su YouTube
// @name:es Usar AV1 en YouTube
// @description:es Usar AV1 para la reproducción de videos en YouTube
// @namespace http://tampermonkey.net/
// @version 1.0.7
// @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 chrome
// @compatible firefox
// @compatible opera
// @unwrap
// @allFrames true
// @inject-into page
// ==/UserScript==
(function (__Promise__) {
'use strict';
const Promise = __Promise__; // YouTube hacks Promise in WaterFox Classic and "Promise.resolve(0)" nevers resolve.
console.debug("force-youtube-av1", "injected");
function enableAV1() {
console.debug("force-youtube-av1", "AV1 enabled");
// This is the setting to force AV1
// localStorage['yt-player-av1-pref'] = '8192';
Object.defineProperty(localStorage, 'yt-player-av1-pref', { value: '8192', writable: true, enumerable: true, configurable: true });
function typeTest(type) {
let disallowed_types = ['vp8', 'vp9'];
// mp4a is a container for AAC. In most cases (<192kbps), Opus is better than AAC.
// vp09 will be also disabled if av1 is enabled.
for (const disallowed_type of disallowed_types) {
if (type.includes(disallowed_type)) return false;
}
let force_allow_types = ['av1', 'av01', 'hev1'];
// av1 is currently supported by Firefox and Chrome except Edge
for (const force_allow_type of force_allow_types) {
if (type.includes(force_allow_type)) return true;
}
}
// return a custom MIME type checker that can defer to the original function
function makeModifiedTypeChecker(origChecker) {
// Check if a video type is allowed
return function (type) {
let res = undefined;
if (type === undefined) res = false;
else {
res = typeTest(type);
}
if (res === undefined) res = origChecker.apply(this, arguments);
// 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);
}
// 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);
}
}
let promise = null;
function callback(result) {
if (result && result.supported && result.smooth) enableAV1();
else {
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.');
}
}
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,
}
}).then(callback).catch(callback);
} catch (e) {
promise = null;
}
if (!promise) promise = Promise.resolve(0).then(callback).catch(callback);
})(Promise);