fix: camera light flashes and turns off when clicking webcam button (…

.gitignore

@@ -25,6 +25,7 @@ dist-ssr
 *.sw?
 release/**
 *.kiro/
+.claude/
 # npx electron-builder --mac --win
 
 # Playwright

src/components/launch/LaunchWindow.tsx

@@ -436,6 +436,7 @@ export function LaunchWindow() {
 						onClick={async () => {
 							await setWebcamEnabled(!webcamEnabled);
 						}}
+						disabled={recording}
 						title={webcamEnabled ? t("webcam.disableWebcam") : t("webcam.enableWebcam")}
 					>
 						{webcamEnabled

src/hooks/useScreenRecorder.ts

@@ -103,6 +103,7 @@ export function useScreenRecorder(): UseScreenRecorderReturn {
 	const allowAutoFinalize = useRef(false);
 	const discardRecordingId = useRef<number | null>(null);
 	const restarting = useRef(false);
+	const webcamReady = useRef(false);
 
 	const selectMimeType = () => {
 		const preferred = [
@@ -145,10 +146,6 @@ export function useScreenRecorder(): UseScreenRecorderReturn {
 			microphoneStream.current.getTracks().forEach((track) => track.stop());
 			microphoneStream.current = null;
 		}
-		if (webcamStream.current) {
-			webcamStream.current.getTracks().forEach((track) => track.stop());
-			webcamStream.current = null;
-		}
 		if (mixingContext.current) {
 			mixingContext.current.close().catch(() => {
 				// Ignore close errors during recorder teardown.
@@ -181,6 +178,78 @@ export function useScreenRecorder(): UseScreenRecorderReturn {
 		[t],
 	);
 
+	useEffect(() => {
+		if (!webcamEnabled) return;
+
+		let cancelled = false;
+		let acquiredStream: MediaStream | null = null;
+		webcamReady.current = false;
+
+		const acquire = async () => {
+			try {
+				const stream = await navigator.mediaDevices.getUserMedia({
+					audio: false,
+					video: webcamDeviceId
+						? {
+								deviceId: { exact: webcamDeviceId },
+								width: { ideal: WEBCAM_TARGET_WIDTH },
+								height: { ideal: WEBCAM_TARGET_HEIGHT },
+								frameRate: { ideal: WEBCAM_TARGET_FRAME_RATE, max: WEBCAM_TARGET_FRAME_RATE },
+							}
+						: {
+								width: { ideal: WEBCAM_TARGET_WIDTH },
+								height: { ideal: WEBCAM_TARGET_HEIGHT },
+								frameRate: { ideal: WEBCAM_TARGET_FRAME_RATE, max: WEBCAM_TARGET_FRAME_RATE },
+							},
+				});
+
+				if (cancelled) {
+					stream.getTracks().forEach((track) => track.stop());
+					return;
+				}
+
+				acquiredStream = stream;
+				stream.getVideoTracks().forEach((track) => {
+					track.onended = () => {
+						webcamStream.current = null;
+						if (!restarting.current) {
+							setWebcamEnabledState(false);
+							toast.error(t("recording.cameraDisconnected"));
+						}
+					};
+				});
+				webcamStream.current = stream;
+				webcamReady.current = true;
+			} catch (cameraError) {
+				if (!cancelled) {
+					console.warn("Failed to get webcam access:", cameraError);
+					setWebcamEnabledState(false);
+					const isDeviceError =
+						cameraError instanceof DOMException &&
+						[
+							"NotFoundError",
+							"DevicesNotFoundError",
+							"OverconstrainedError",
+							"NotReadableError",
+						].includes(cameraError.name);
+					toast.error(t(isDeviceError ? "recording.cameraNotFound" : "recording.cameraBlocked"));
+					webcamReady.current = true;
+				}
+			}
+		};
+
+		void acquire();
+
+		return () => {
+			cancelled = true;
+			webcamReady.current = false;
+			if (acquiredStream) {
+				acquiredStream.getTracks().forEach((track) => track.stop());
+				webcamStream.current = null;
+			}
+		};
+	}, [webcamEnabled, webcamDeviceId, t]);
+
 	const finalizeRecording = useCallback(
 		(
 			activeScreenRecorder: RecorderHandle,
@@ -409,30 +478,24 @@ export function useScreenRecorder(): UseScreenRecorderReturn {
 			}
 
 			if (webcamEnabled) {
-				try {
-					webcamStream.current = await navigator.mediaDevices.getUserMedia({
-						audio: false,
-						video: webcamDeviceId
-							? {
-									deviceId: { exact: webcamDeviceId },
-									width: { ideal: WEBCAM_TARGET_WIDTH },
-									height: { ideal: WEBCAM_TARGET_HEIGHT },
-									frameRate: { ideal: WEBCAM_TARGET_FRAME_RATE, max: WEBCAM_TARGET_FRAME_RATE },
-								}
-							: {
-									width: { ideal: WEBCAM_TARGET_WIDTH },
-									height: { ideal: WEBCAM_TARGET_HEIGHT },
-									frameRate: { ideal: WEBCAM_TARGET_FRAME_RATE, max: WEBCAM_TARGET_FRAME_RATE },
-								},
+				if (!webcamReady.current) {
+					await new Promise<void>((resolve) => {
+						const interval = setInterval(() => {
+							if (webcamReady.current) {
+								clearInterval(interval);
+								resolve();
+							}
+						}, 50);
+						setTimeout(() => {
+							clearInterval(interval);
+							resolve();
+						}, 5000);
 					});
-				} catch (cameraError) {
-					console.warn("Failed to get webcam access:", cameraError);
-					if (webcamStream.current) {
-						webcamStream.current.getTracks().forEach((track) => track.stop());
-						webcamStream.current = null;
-					}
+				}
+				if (!webcamStream.current) {
+					// The useEffect already showed the appropriate error toast
+					// (cameraNotFound or cameraBlocked), so just disable the state.
 					setWebcamEnabledState(false);
-					toast.error(t("recording.cameraDenied"));
 				}
 			}
 

src/i18n/locales/en/editor.json

@@ -30,6 +30,8 @@
 		"systemAudioUnavailable": "System audio not available. Recording without system audio.",
 		"microphoneDenied": "Microphone access denied. Recording will continue without audio.",
 		"cameraDenied": "Camera access denied. Recording will continue without webcam.",
+		"cameraDisconnected": "Webcam disconnected.",
+		"cameraNotFound": "Camera not found.",
 		"permissionDenied": "Recording permission denied. Please allow screen recording."
 	}
 }

src/i18n/locales/es/editor.json

@@ -30,6 +30,8 @@
 		"systemAudioUnavailable": "Audio del sistema no disponible. Grabando sin audio del sistema.",
 		"microphoneDenied": "Acceso al micrófono denegado. La grabación continuará sin audio.",
 		"cameraDenied": "Acceso a la cámara denegado. La grabación continuará sin cámara web.",
+		"cameraDisconnected": "Cámara web desconectada.",
+		"cameraNotFound": "Cámara no encontrada.",
 		"permissionDenied": "Permiso de grabación denegado. Por favor permite la grabación de pantalla."
 	}
 }

src/i18n/locales/zh-CN/editor.json

@@ -30,6 +30,8 @@
 		"systemAudioUnavailable": "系统音频不可用。将在无系统音频的情况下录制。",
 		"microphoneDenied": "麦克风权限被拒绝。录制将继续，但不包含音频。",
 		"cameraDenied": "摄像头权限被拒绝。录制将继续，但不包含摄像头画面。",
+		"cameraDisconnected": "摄像头已断开连接。",
+		"cameraNotFound": "未找到摄像头。",
 		"permissionDenied": "录屏权限被拒绝。请允许屏幕录制。"
 	}
 }

src/lib/requestCameraAccess.ts

@@ -17,9 +17,7 @@ export async function requestCameraAccess(): Promise<CameraAccessResult> {
 	if (window.electronAPI?.requestCameraAccess) {
 		try {
 			const electronResult = await window.electronAPI.requestCameraAccess();
-			if (!electronResult.success || !electronResult.granted) {
-				return electronResult;
-			}
+			return electronResult;
 		} catch (error) {
 			return {
 				success: false,