diff --git a/examples/face_landmark/face_landmark.py b/examples/face_landmark/face_landmark.py
index ae7c877b..3da5232a 100644
--- a/examples/face_landmark/face_landmark.py
+++ b/examples/face_landmark/face_landmark.py
@@ -111,14 +111,15 @@ async def frame_loop(video_stream: rtc.VideoStream) -> None:
         buffer = frame_event.frame
         buffer = buffer.convert(rtc.VideoBufferType.RGBA)
 
-
         arr = np.frombuffer(buffer.data, dtype=np.uint8)
         arr = arr.reshape((buffer.height, buffer.width, 4))
         arr = cv2.cvtColor(arr, cv2.COLOR_RGBA2RGB)
 
         mp_image = mp.Image(image_format=mp.ImageFormat.SRGB, data=arr)
 
-        detection_result = landmarker.detect_for_video(mp_image, frame_event.timestamp_us)
+        detection_result = landmarker.detect_for_video(
+            mp_image, frame_event.timestamp_us
+        )
 
         draw_landmarks_on_image(arr, detection_result)
 
diff --git a/livekit-rtc/livekit/rtc/audio_stream.py b/livekit-rtc/livekit/rtc/audio_stream.py
index ff497acf..0a275a35 100644
--- a/livekit-rtc/livekit/rtc/audio_stream.py
+++ b/livekit-rtc/livekit/rtc/audio_stream.py
@@ -29,7 +29,6 @@ class AudioFrameEvent:
     frame: AudioFrame
 
 
-
 class AudioStream:
     """AudioStream is a stream of audio frames received from a RemoteTrack."""