Function extractAudioFromUrl

apps/web/lib/audio-extract.ts:56–109

(
	videoUrl: string,
)

}

export async function extractAudioFromUrl(
	videoUrl: string,
): Promise<AudioExtractionResult> {
	const ffmpeg = getFfmpegPath();
	const outputPath = join(tmpdir(), `audio-${randomUUID()}.mp3`);

	const ffmpegArgs = [
		"-i",
		videoUrl,
		"-vn",
		"-acodec",
		"libmp3lame",
		"-b:a",
		"128k",
		"-f",
		"mp3",
		"-y",
		outputPath,
	];

	return new Promise((resolve, reject) => {
		const proc = spawn(ffmpeg, ffmpegArgs, { stdio: ["pipe", "pipe", "pipe"] });

		let stderr = "";

		proc.stderr?.on("data", (data: Buffer) => {
			stderr += data.toString();
		});

		proc.on("error", (err: Error) => {
			fs.unlink(outputPath).catch(() => {});
			reject(new Error(`Audio extraction failed: ${err.message}`));
		});

		proc.on("close", (code: number | null) => {
			if (code === 0) {
				resolve({
					filePath: outputPath,
					mimeType: "audio/mpeg",
					cleanup: async () => {
						try {
							await fs.unlink(outputPath);
						} catch {}
					},
				});
			} else {
				fs.unlink(outputPath).catch(() => {});
				reject(
					new Error(`Audio extraction failed with code ${code}: ${stderr}`),
				);
			}
		});
	});
}

export async function extractAudioToBuffer(videoUrl: string): Promise<Buffer> {
	const ffmpeg = getFfmpegPath();