Automcatically switches to your pre-selected resolution. Enables premium when possible.
// ==UserScript==
// @name Youtube HD Premium
// @icon data:image/png;base64,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
// @author ElectroKnight22
// @namespace electroknight22_youtube_hd_namespace
// @version 2024.10.14
// I would prefer semantic versioning but it's a bit too late to change it at this point. Calendar versioning was originally chosen to maintain similarity to the adisib's code.
// @match *://www.youtube.com/*
// @exclude *://www.youtube.com/live_chat*
// @grant GM.getValue
// @grant GM.setValue
// @grant GM.deleteValue
// @grant GM.listValues
// @grant GM_registerMenuCommand
// @grant GM_unregisterMenuCommand
// @license MIT
// @description Automcatically switches to your pre-selected resolution. Enables premium when possible.
// @description:zh-TW 自動切換到你預先設定的畫質。會優先使用Premium位元率。
// @description:zh-CN 自动切换到你预先设定的画质。会优先使用Premium比特率。
// @description:ja 自動的に設定した画質に替わります。Premiumのビットレートを優先的に選択します。
// @homepage https://greasyfork.org/en/scripts/498145-youtube-hd-premium
// ==/UserScript==
/*jshint esversion: 11 */
(function() {
"use strict";
const DEFAULT_SETTINGS = {
targetResolution: "hd2160",
expandMenu: false,
debug: false
};
const resolutions = ['highres', 'hd2880', 'hd2160', 'hd1440', 'hd1080', 'hd720', 'large', 'medium', 'small', 'tiny', 'auto'];
const quality = {
highres: 4320,
hd2880: 2880,
hd2160: 2160,
hd1440: 1440,
hd1080: 1080,
hd720: 720,
large: 480,
medium: 360,
small: 240,
tiny: 144,
auto: 0
};
const qualityLevels = Object.fromEntries(
Object.entries(quality).map(([key, value]) => [value, key])
);
let userSettings = { ...DEFAULT_SETTINGS };
let menuItems = [];
let videoId = '';
let resolvedTarget = '';
let targetLabel = '';
let ytPlayer = document.getElementById("movie_player") || document.getElementsByClassName("html5-video-player")[0];
let video = document.querySelector('video');
const premiumIndicator = "Premium";
// --- CLASS DEFINITIONS -----------
class AllowedExceptionError extends Error {
constructor(message) {
super(message);
this.name = "Allowed Exception";
}
}
// --- FUNCTIONS ------
function debugLog(message) {
if (!userSettings.debug) return;
const stack = new Error().stack;
const stackLines = stack.split("\n");
const callerLine = stackLines[2] ? stackLines[2].trim() : "Line not found";
message += "";
if (!message.endsWith(".")) {
message += ".";
}
console.log(`[YTHD DEBUG] ${message} Function called ${callerLine}`);
}
// Attempt to set the video resolution to target quality or the next best quality
function setResolution(force = false) {
try {
checkVideoValid(force);
resolvedTarget = userSettings.targetResolution;
let premiumData = null;
if (resolvedTarget != 'auto') {
const availableQualities = ytPlayer.getAvailableQualityLevels();
resolvedTarget = findNextAvailableQuality(resolvedTarget, availableQualities);
debugLog("Resolved target resolution: " + resolvedTarget);
premiumData = ytPlayer.getAvailableQualityData().find(q => q.quality === resolvedTarget && q.qualityLabel.trim().endsWith(premiumIndicator) && q.isPlayable);
}
ytPlayer.setPlaybackQualityRange(resolvedTarget, resolvedTarget, premiumData?.formatId);
targetLabel = quality[resolvedTarget] + "p" + (premiumData ? " " + premiumIndicator : "");
videoId = ytPlayer.getVideoData().video_id;
debugLog(`Setting quality to: ${resolvedTarget == "auto" ? "auto" : targetLabel}`);
} catch (error) {
debugLog("Did not set resolution. " + error);
}
}
function checkVideoValid(force) {
//debugLog(JSON.stringify(ytPlayer?.getVideoData(), null, 2));
//debugLog(JSON.stringify(ytPlayer?.getAvailableQualityLevels(), null, 2));
try {
if (/^https?:\/\/(www\.)?youtube\.com\/shorts\//.test(window.location.href)) {
throw new AllowedExceptionError("Skipping Youtube Shorts.");
}
if (!ytPlayer?.getAvailableQualityLabels().length) {
throw "Video data missing.";
}
if (videoId == ytPlayer.getVideoData().video_id && !force) {
throw new AllowedExceptionError("Duplicate Load. Skipping.");
}
} catch (error) {
throw error;
}
}
function findNextAvailableQuality(target, availableQualities) {
const targetValue = quality[target];
return availableQualities
.map(q => ({ quality: q, value: quality[q] }))
.find(q => q.value <= targetValue)?.quality || 'auto';
}
function compareQualityLabelButIgnoreFrameRate(label1, label2) {
const normalize = label => label.replace(new RegExp(`(\\d+p)\\d*( ${premiumIndicator})?$`), '$1').trim();
return normalize(label1) === normalize(label2);
}
// Tries to validate setting changes. If this fails to detect a successful update it will call setResolution to attempt to force the playback quality to update again.
function verifyChange(retries = 10) {
const retryDelay = 500;
try {
checkVideoValid(true);
let success = ytPlayer.getPreferredQuality() !== "auto" || userSettings.targetResolution === "auto";
let currentQualityLabel = ytPlayer.getPlaybackQualityLabel();
let isManualChange = !compareQualityLabelButIgnoreFrameRate(currentQualityLabel, targetLabel);
if (success) {
debugLog(`Quality is ${currentQualityLabel}. ${isManualChange ? "Manual change detected!" : "Change verified!"}`);
} else {
throw "Unable to verify change";
}
} catch (error) {
if (error instanceof AllowedExceptionError) {
debugLog(error);
} else if (retries) {
debugLog(`Error when verifying quality change. [${error}] Attempting quality change and reverifying after ${retryDelay}ms...`);
setResolution(true);
setTimeout(() => verifyChange(retries - 1), retryDelay);
} else {
debugLog(`Cannot verify quality change after retrying.`);
}
}
}
function processNewVideo() {
try {
video?.removeEventListener('playing', verifyChange, true);
videoId = '';
ytPlayer = document.getElementById("movie_player") || document.getElementsByClassName("html5-video-player")[0] || ytPlayer;
video = ytPlayer?.querySelector('video') || document.querySelector('video');
if (!video) throw "Video element not found.";
video.addEventListener('playing', verifyChange, true);
setResolution();
} catch (error) {
debugLog("Load error: " + error);
}
}
// ----------------------------------------
// Functions for the quality selection menu
function removeMenuOptions() {
while (menuItems.length) {
GM_unregisterMenuCommand(menuItems.pop());
}
}
function showMenuOptions() {
removeMenuOptions();
const isExpandMenu = userSettings.expandMenu;
const menuButton = GM_registerMenuCommand(`Quality Settings [${ isExpandMenu ? "HIDE" : "SHOW" }]`, () => {
userSettings.expandMenu = !isExpandMenu;
GM.setValue('expandMenu', userSettings.expandMenu);
showMenuOptions();
}, {
autoClose: false
});
menuItems.push(menuButton);
if (!isExpandMenu) return;
resolutions.forEach((resolution) => {
let qualityText = (resolution === 'auto') ? 'auto' : quality[resolution] + "p";
if (resolution === userSettings.targetResolution) {
qualityText += " ✅";
}
const qualityOption = GM_registerMenuCommand(qualityText, () => {
setSelectedResolution(resolution);
}, {
autoClose: false,
});
menuItems.push(qualityOption);
});
const showDebug = userSettings.debug;
const debugButton = GM_registerMenuCommand(`DEBUG [${showDebug ? "ON" : "OFF"}]`, () => {
userSettings.debug = !showDebug;
GM.setValue('debug', userSettings.debug);
showMenuOptions();
}, {
autoClose: false
});
menuItems.push(debugButton);
}
function setSelectedResolution(resolution) {
if (userSettings.targetResolution == resolution) return;
userSettings.targetResolution = resolution;
GM.setValue('targetResolution', resolution);
showMenuOptions();
setResolution(true);
}
// -----------------------------------------------
// User setting handling
async function loadUserSettings() {
// Get all keys from GM
const storedValues = await GM.listValues();
// Write any missing key-value pairs from DEFAULT_SETTINGS to GM
for (const [key, value] of Object.entries(DEFAULT_SETTINGS)) {
if (!storedValues.includes(key)) {
await GM.setValue(key, value);
}
}
// Delete any extra keys in GM that are not in DEFAULT_SETTINGS
for (const key of storedValues) {
if (!(key in DEFAULT_SETTINGS)) {
await GM.deleteValue(key);
}
}
// Retrieve and update user settings from GM
const keyValuePairs = await Promise.all(storedValues.map(async key => [key, await GM.getValue(key)]));
keyValuePairs.forEach(([newKey, newValue]) => {
userSettings[newKey] = newValue;
});
debugLog(`Loaded user settings: [${Object.entries(userSettings).map(([key, value]) => `${key}: ${value}`).join(", ")}].`);
}
// Main function
async function initialize() {
try {
await loadUserSettings();
} catch (error) {
return debugLog(`Error loading user settings: ${error}. Exiting script.`);
}
window.addEventListener('popstate', () => { videoId = ''; });
if (window.self == window.top) {
// handle youtube website
window.addEventListener("yt-navigate-finish", processNewVideo, true );
showMenuOptions();
} else {
// handle iframes
window.addEventListener('load', processNewVideo, true );
}
}
// Entry Point
initialize();
})();