Force YouTube Music to use the Opus codec by blocking AAC.
// ==UserScript==
// @name YouTube Music Opus Codec
// @icon https://www.google.com/s2/favicons?sz=64&domain=music.youtube.com
// @author ElectroKnight22
// @namespace electroknight22_youtube_music_opus_codec_namespace
// @version 3.0.0
// @description Force YouTube Music to use the Opus codec by blocking AAC.
// @match *://music.youtube.com/*
// @run-at document-start
// @grant none
// @inject-into page
// @license MIT
// ==/UserScript==
/*jshint esversion: 11 */
(function () {
'use strict';
// Modern Logic
if (window.MediaSource) {
const originalIsTypeSupported = window.MediaSource.isTypeSupported;
window.MediaSource.isTypeSupported = function (mime) {
// Block AAC to force YTM to default to Opus.
if (typeof mime === 'string' && (mime.includes('mp4a') || mime.includes('aac'))) return false;
return originalIsTypeSupported.call(this, mime);
};
}
// Legacy Fallback Logic
const originalCanPlayType = window.HTMLMediaElement.prototype.canPlayType;
window.HTMLMediaElement.prototype.canPlayType = function (mime) {
// Block AAC to force YTM to default to Opus.
if (typeof mime === 'string' && (mime.includes('mp4a') || mime.includes('aac'))) return '';
return originalCanPlayType.call(this, mime);
};
})();