194 lines
5.8 KiB
TypeScript
Executable file
194 lines
5.8 KiB
TypeScript
Executable file
import {
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mkdir,
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readdir as readDir,
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rename as mv,
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} from 'fs/promises';
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import { ffprobe as ffProbe } from 'fluent-ffmpeg';
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import { spawnSync as spawn } from 'child_process';
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import { ISO6391To3, ISO6393To1 } from './lang-codes';
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const SPAWN_OPTS = {
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shell: true,
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stdio: [process.stdin, process.stdout, process.stderr],
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};
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/**
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* These are the cli arguments
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*
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* @param directory the directory in which we want to sync the subtitles
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* @param languages a comma-separated list of languages (3 letters) to sync the subtitles
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*/
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const DIR = process.argv[2];
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let langs = process.argv[3].split(',');
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// Check if there are 2 params
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if (DIR && langs) {
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main();
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}
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else {
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console.error('Error: no argument passed');
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process.exit(1);
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}
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const escapePath = (p: string) => p.replaceAll("'", "'\\''");
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function getVideoPath(files: string[]) {
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const fileName = DIR.split('/').at(-1) ?? '';
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const videoFiles = files.filter((f) =>
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f.includes(fileName) && f.endsWith('mkv'));
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if (videoFiles.length === 0) {
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console.warn('No video files were found');
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process.exit(0);
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}
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return `${DIR}/${videoFiles[0]}`;
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}
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async function backupSubs(files: string[]) {
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// Check if backup folder already exists and create it if not
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if (!files.some((f) => f.endsWith('.srt.bak'))) {
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await mkdir(`${DIR}/.srt.bak`);
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}
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else {
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// TODO: compare with subs outside of backup dir
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const backups = await readDir(`${DIR}/.srt.bak`);
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// Remove synced subtitles from the list to sync
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// langs - backups
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langs = langs.filter((n) => !backups
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.some((s) => {
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const l2 = s.split('.').at(-2) ?? '';
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const l3 = ISO6391To3.get(l2);
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return n === l3;
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}));
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}
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if (langs.length === 0) {
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console.warn('Subtitles have already been synced');
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process.exit(0);
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}
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}
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function runSubSync(
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cmd: string[],
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onError = (error?: string) => {
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console.error(error);
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},
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) {
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const { error } = spawn('subsync', cmd, SPAWN_OPTS);
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if (error) {
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onError(error.message);
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}
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spawn('chmod', ['-R', '775', `'${escapePath(DIR)}'`], SPAWN_OPTS);
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}
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async function main() {
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const files = await readDir(DIR);
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const VIDEO = getVideoPath(files);
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const BASE_NAME = VIDEO.split('/').at(-1)?.replace(/\.[^.]*$/, '');
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backupSubs(files);
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// ffprobe the video file to see available audio tracks
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ffProbe(VIDEO, (_e, data) => {
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if (!data?.streams) {
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console.error('Couldn\'t find streams in video file');
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process.exit(0);
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}
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const AVAIL_LANGS = data.streams
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.filter((s) => s.codec_type === 'audio')
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.map((s) => s['tags'] && s['tags']['language']);
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// Sync subtitles one by one
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langs.forEach(async(lang) => {
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const FILE_NAME = `${BASE_NAME}.${ISO6393To1.get(lang)}.srt`;
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const IN_FILE = `${DIR}/.srt.bak/${FILE_NAME}`;
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const OUT_FILE = `${DIR}/${FILE_NAME}`;
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const cmd = [
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'--cli sync',
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`--sub-lang ${lang}`,
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`--ref-stream-by-lang ${AVAIL_LANGS.includes(lang) ?
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lang :
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AVAIL_LANGS[0]}`,
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'--ref-stream-by-type "audio"',
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`--sub '${escapePath(IN_FILE)}'`,
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`--out '${escapePath(OUT_FILE)}'`,
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`--ref '${escapePath(VIDEO)}'`,
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];
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if (files.includes(FILE_NAME)) {
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await mv(OUT_FILE, IN_FILE);
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runSubSync(cmd, async() => {
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await mv(IN_FILE, OUT_FILE);
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});
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}
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else {
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let subs = data.streams.filter((s) => {
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return s['tags'] &&
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s['tags']['language'] &&
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s['tags']['language'] === lang &&
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s.codec_type === 'subtitle';
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});
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const pgs = subs.filter((s) => s.codec_name === 'hdmv_pgs_subtitle');
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// If we only have PGS subs, warn user
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if (pgs.length === subs.length) {
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console.warn(`No SRT subtitle tracks were found for ${lang}`);
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}
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// Remove PGS streams from subs
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subs = subs.filter((s) => s.codec_name !== 'hdmv_pgs_subtitle');
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// Prefer normal subs
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if (subs.length !== 1) {
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subs = subs.filter((s) => s.disposition?.forced === 0);
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}
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if (subs.length === 0) {
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console.warn(`No subtitle tracks were found for ${lang}`);
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}
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else {
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// Extract subtitle
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spawn('ffmpeg', [
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'-i', `'${escapePath(VIDEO)}'`,
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'-map', `"0:${subs[0].index}"`, `'${escapePath(IN_FILE)}'`,
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], SPAWN_OPTS);
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// Delete subtitle from video
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spawn('mv', [
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`'${escapePath(VIDEO)}'`,
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`'${escapePath(VIDEO)}.bak'`,
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], SPAWN_OPTS);
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spawn('ffmpeg', [
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'-i', `'${escapePath(VIDEO)}.bak'`,
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'-map', '0',
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'-map', `-0:${subs[0].index}`,
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'-c', 'copy', `'${escapePath(VIDEO)}'`,
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], SPAWN_OPTS);
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spawn('rm', [`'${escapePath(VIDEO)}.bak'`], SPAWN_OPTS);
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// Sync extracted subtitle
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runSubSync(cmd, async() => {
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await mv(IN_FILE, OUT_FILE);
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});
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}
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}
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});
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});
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}
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