Function muxNativeVideoExportAudio

electron/ipc/export/native-video.ts:4068–4146

(
	videoPath: string,
	options: NativeVideoExportFinishOptions,
	onProgress?: (progress: NativeVideoAudioMuxProgress) => void,
	session?: NativeStaticLayoutExportSession,
)

}

export async function muxNativeVideoExportAudio(
	videoPath: string,
	options: NativeVideoExportFinishOptions,
	onProgress?: (progress: NativeVideoAudioMuxProgress) => void,
	session?: NativeStaticLayoutExportSession,
) {
	const audioMode = options.audioMode ?? "none";
	if (audioMode === "none") {
		return {
			outputPath: videoPath,
			metrics: {} as NativeVideoAudioMuxMetrics,
		};
	}

	const ffmpegPath = getFfmpegBinaryPath();
	const metrics: NativeVideoAudioMuxMetrics = {};
	const tempArtifacts: string[] = [];
	let audioInputPath = options.audioSourcePath ?? null;
	const useEditedTrackFiltergraph =
		audioMode === "edited-track" && options.editedTrackStrategy === "filtergraph-fast-path";

	if (audioMode === "edited-track" && !useEditedTrackFiltergraph) {
		if (!options.editedAudioData) {
			throw new Error("Edited audio data is missing for native export");
		}

		const extension = getEditedAudioExtension(options.editedAudioMimeType);
		audioInputPath = path.join(
			app.getPath("temp"),
			`recordly-export-audio-${Date.now()}-${Math.random().toString(36).slice(2, 8)}${extension}`,
		);
		const tempAudioWriteStartedAt = getNowMs();
		await fs.writeFile(audioInputPath, Buffer.from(options.editedAudioData));
		metrics.tempEditedAudioWriteMs = getNowMs() - tempAudioWriteStartedAt;
		metrics.tempEditedAudioBytes = options.editedAudioData.byteLength;
		tempArtifacts.push(audioInputPath);
	}

	if (!audioInputPath) {
		return {
			outputPath: videoPath,
			metrics,
		};
	}

	const outputPath = path.join(
		path.dirname(videoPath),
		`${path.basename(videoPath, path.extname(videoPath))}-final.mp4`,
	);

	const args = buildNativeVideoAudioMuxArgs(
		videoPath,
		audioInputPath,
		outputPath,
		options,
		onProgress ? { progressPipe: 2 } : {},
	);