Add ytdlp binary

src/lib/server/ytdlp.ts

@@ -0,0 +1,46 @@
+import { create } from 'youtube-dl-exec';
+import { YTDLP_PATH } from '$env/static/private';
+import { spawn } from 'node:child_process';
+
+export const ytdl = create(YTDLP_PATH);
+
+/**
+ * Fetch YouTube metadata (title, uploader/artist)
+ */
+export async function getYouTubeMetadata(link: string) {
+	return await ytdl(link, {
+		dumpSingleJson: true,
+		noCheckCertificates: true,
+		noWarnings: true,
+		preferFreeFormats: true
+	});
+}
+
+/**
+ * Streams the YouTube video/audio using youtube-dl-exec
+ */
+export function streamYouTube(link: string, format: string): ReadableStream<Uint8Array> {
+	return new ReadableStream({
+		start(controller) {
+			const args = [
+				'-o',
+				'-',
+				format === 'mp3' ? '--embed-metadata' : '',
+				'--format',
+				format === 'mp3' ? 'bestaudio' : 'best',
+				'--audio-format',
+				format === 'mp3' ? 'mp3' : '',
+				'--no-playlist'
+			].filter(Boolean);
+
+			const process = spawn('yt-dlp', [...args, link], { stdio: ['ignore', 'pipe', 'ignore'] });
+
+			process.stdout.on('data', (chunk) => controller.enqueue(chunk));
+			process.stdout.on('end', () => controller.close());
+			process.stdout.on('error', (err) => {
+				console.error('Stream error:', err);
+				controller.error(err);
+			});
+		}
+	});
+}