Function extractAudioToBuffer

apps/web/lib/audio-extract.ts:111–154

(videoUrl: string)

}

export async function extractAudioToBuffer(videoUrl: string): Promise<Buffer> {
	const ffmpeg = getFfmpegPath();
	const ffmpegArgs = [
		"-i",
		videoUrl,
		"-vn",
		"-acodec",
		"libmp3lame",
		"-b:a",
		"128k",
		"-f",
		"mp3",
		"-pipe:1",
	];

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

		const chunks: Buffer[] = [];
		let stderr = "";

		proc.stdout?.on("data", (chunk: Buffer) => {
			chunks.push(chunk);
		});

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

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

		proc.on("close", (code: number | null) => {
			if (code === 0) {
				resolve(Buffer.concat(chunks));
			} else {
				reject(
					new Error(`Audio extraction failed with code ${code}: ${stderr}`),
				);
			}
		});
	});
}

export async function convertWavToMp3(wavBuffer: Buffer): Promise<Buffer> {
	const ffmpeg = getFfmpegPath();