Function runFfmpegWithMetrics

electron/ipc/export/native-video.ts:1207–1275

(
	ffmpegPath: string,
	args: string[],
	timeoutMs: number,
	session?: NativeStaticLayoutExportSession,
)

}

async function runFfmpegWithMetrics(
	ffmpegPath: string,
	args: string[],
	timeoutMs: number,
	session?: NativeStaticLayoutExportSession,
): Promise<{
	success: boolean;
	elapsedMs: number;
	stderr: string;
	code: number | null;
	signal: NodeJS.Signals | null;
}> {
	const startedAt = getNowMs();
	return await new Promise((resolve) => {
		const child = spawn(ffmpegPath, args, {
			stdio: ["ignore", "ignore", "pipe"],
		});
		if (session) {
			session.currentProcess = child;
			if (session.terminating) {
				child.kill("SIGKILL");
			}
		}
		let stderr = "";
		let settled = false;
		const timeout = setTimeout(() => {
			if (settled) return;
			try {
				child.kill("SIGKILL");
			} catch {
				// ignore
			}
		}, timeoutMs);

		child.stderr.on("data", (chunk: Buffer) => {
			stderr += chunk.toString();
		});
		child.once("error", (error) => {
			if (settled) return;
			settled = true;
			if (session?.currentProcess === child) {
				session.currentProcess = null;
			}
			clearTimeout(timeout);
			resolve({
				success: false,
				elapsedMs: getNowMs() - startedAt,
				stderr: error instanceof Error ? error.message : String(error),
				code: null,
				signal: null,
			});
		});
		child.once("close", (code, signal) => {
			if (settled) return;
			settled = true;
			if (session?.currentProcess === child) {
				session.currentProcess = null;
			}