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Fix lerobot-find-cameras hang with Intel IPU6 (MIPI) cameras by forcing V4L2 on Linux #2657

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Fix lerobot-find-cameras hang with Intel IPU6 (MIPI) cameras by forcing V4L2 on Linux #2657

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2 changes: 1 addition & 1 deletion src/lerobot/cameras/opencv/camera_opencv.py
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Original file line number Diff line number Diff line change
Expand Up @@ -308,7 +308,7 @@ def find_cameras() -> list[dict[str, Any]]:
targets_to_scan = [int(i) for i in range(MAX_OPENCV_INDEX)]

for target in targets_to_scan:
camera = cv2.VideoCapture(target)
camera = cv2.VideoCapture(target, get_cv2_backend())
if camera.isOpened():
default_width = int(camera.get(cv2.CAP_PROP_FRAME_WIDTH))
default_height = int(camera.get(cv2.CAP_PROP_FRAME_HEIGHT))
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4 changes: 3 additions & 1 deletion src/lerobot/cameras/utils.py
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Expand Up @@ -72,5 +72,7 @@ def get_cv2_backend() -> int:
return int(cv2.CAP_MSMF) # Use MSMF for Windows instead of AVFOUNDATION
# elif platform.system() == "Darwin": # macOS
# return cv2.CAP_AVFOUNDATION
else: # Linux and others
elif platform.system() == "Linux":
return int(cv2.CAP_V4L2)
else: # others
return int(cv2.CAP_ANY)