diff --git a/camera_server.py b/camera_server.py
index 6ee6b5e..4d129b3 100644
--- a/camera_server.py
+++ b/camera_server.py
@@ -102,7 +102,7 @@ def _build_pipeline(cfg: dict, encoder: str, overlay_text: str) -> str:
         return (
             f"libcamerasrc ! "
             f"video/x-raw,width={w},height={h},format=NV12,framerate={fps}/1 ! "
-            f"v4l2convert ! video/x-raw,format=NV12 ! "
+            f"v4l2convert ! video/x-raw,format=I420 ! "
             f"{overlay} ! "
             f"v4l2h264enc video-bitrate={bitrate_bps} "
             f'extra-controls="controls,repeat_sequence_header=1" ! '