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feat: Add subtitles translation prevention
🎯 Forces YouTube subtitles to stay in video's original language - Use ASR track to detect original video language - Apply manual track in same language if available - Disable subtitles if only ASR track is available
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| /* | ||
| * Copyright (C) 2025-present YouGo (https://github.com/youg-o) | ||
| * This program is licensed under the GNU Affero General Public License v3.0. | ||
| * You may redistribute it and/or modify it under the terms of the license. | ||
| * | ||
| * Attribution must be given to the original author. | ||
| * This program is distributed without any warranty; see the license for details. | ||
| */ | ||
|
|
||
| /** | ||
| * Handles YouTube's subtitles selection to force original language | ||
| * | ||
| * YouTube provides different types of subtitle tracks: | ||
| * - ASR (Automatic Speech Recognition) tracks: Always in original video language | ||
| * - Manual tracks: Can be original or translated | ||
| * - Translated tracks: Generated from manual tracks | ||
| * | ||
| * Strategy: | ||
| * 1. Find ASR track to determine original video language | ||
| * 2. Look for manual track in same language | ||
| * 3. Apply original language track if found | ||
| */ | ||
|
|
||
| async function handleSubtitlesTranslation() { | ||
| subtitlesLog('Initializing subtitles translation prevention'); | ||
| const script = document.createElement('script'); | ||
| script.src = browser.runtime.getURL('dist/content/subtitlesTranslation/subtitlesScript.js'); | ||
| document.documentElement.appendChild(script); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| /* | ||
| * Copyright (C) 2025-present YouGo (https://github.com/youg-o) | ||
| * This program is licensed under the GNU Affero General Public License v3.0. | ||
| * You may redistribute it and/or modify it under the terms of the license. | ||
| * | ||
| * Attribution must be given to the original author. | ||
| * This program is distributed without any warranty; see the license for details. | ||
| */ | ||
|
|
||
| (() => { | ||
| const LOG_PREFIX = '[YNT]'; | ||
| const LOG_STYLES = { | ||
| SUBTITLES: { context: '[SUBTITLES]', color: '#FF9800' } | ||
| }; | ||
|
|
||
| function createLogger(category) { | ||
| return (message, ...args) => { | ||
| console.log( | ||
| `%c${LOG_PREFIX}${category.context} ${message}`, | ||
| `color: ${category.color}`, | ||
| ...args | ||
| ); | ||
| }; | ||
| } | ||
|
|
||
| const subtitlesLog = createLogger(LOG_STYLES.SUBTITLES); | ||
|
|
||
| function setOriginalSubtitles() { | ||
| const player = document.getElementById('movie_player'); | ||
| if (!player) return false; | ||
|
|
||
| try { | ||
| // Get current track - if no track, subtitles are disabled | ||
| const currentTrack = player.getOption('captions', 'track'); | ||
| if (!currentTrack) return true; // No captions enabled, nothing to do | ||
|
|
||
| // Get video response to access caption tracks | ||
| const response = player.getPlayerResponse(); | ||
| const captionTracks = response.captions?.playerCaptionsTracklistRenderer?.captionTracks; | ||
| if (!captionTracks) return false; | ||
|
|
||
| // Find ASR track to determine original language | ||
| const asrTrack = captionTracks.find(track => track.kind === 'asr'); | ||
| if (!asrTrack) return false; | ||
|
|
||
| // Find manual track in original language | ||
| const originalTrack = captionTracks.find(track => | ||
| track.languageCode === asrTrack.languageCode && !track.kind | ||
| ); | ||
|
|
||
| // If no manual track in original language exists | ||
| if (!originalTrack) { | ||
| subtitlesLog('No manual track in original language, disabling subtitles'); | ||
| player.setOption('captions', 'track', {}); // Disable subtitles | ||
| return true; | ||
| } | ||
|
|
||
| // If current track is already the original manual track, do nothing | ||
| if (currentTrack.languageCode === asrTrack.languageCode && !currentTrack.kind) { | ||
| subtitlesLog(`Subtitles are already in original language: "${currentTrack.languageName}"`); | ||
| return true; | ||
| } | ||
|
|
||
| // Apply original manual track | ||
| subtitlesLog(`Setting subtitles from "${currentTrack.languageName}" to original language "${originalTrack.name.simpleText}"`); | ||
| player.setOption('captions', 'track', originalTrack); | ||
| return true; | ||
|
|
||
| } catch (error) { | ||
| subtitlesLog('Error:', error); | ||
| return false; | ||
| } | ||
| } | ||
|
|
||
| const player = document.getElementById('movie_player'); | ||
| if (player) { | ||
| let processingVideoId = null; | ||
| let initialSetupDone = false; | ||
|
|
||
| player.addEventListener('onVideoDataChange', () => { | ||
| const videoId = new URLSearchParams(window.location.search).get('v'); | ||
| if (videoId === processingVideoId) return; | ||
|
|
||
| processingVideoId = videoId; | ||
| subtitlesLog('Video data changed, checking subtitles...'); | ||
|
|
||
| const success = setOriginalSubtitles(); | ||
| if (success) { | ||
| processingVideoId = null; | ||
| } else if (!initialSetupDone) { | ||
| initialSetupDone = true; | ||
| setTimeout(() => { | ||
| setOriginalSubtitles(); | ||
| processingVideoId = null; | ||
| }, 200); | ||
| } | ||
| }); | ||
|
|
||
| // Initial setup | ||
| setOriginalSubtitles(); | ||
| initialSetupDone = true; | ||
| } | ||
| })(); |
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