I’m doing the picar-x project now, and other things are working well. However, I’m stuck at enabling camera on my pi 4 (Raspberry Pi 4 Model B Rev 1.5)
$ vcgencmd get_camera
supported=0 detected=0, libcamera interfaces=0
~ $ libcamera-hello
[0:03:45.808735576] [3014] INFO Camera camera_manager.cpp:327 libcamera v0.4.0+53-29156679
[0:03:45.859006614] [3023] WARN RPiSdn sdn.cpp:40 Using legacy SDN tuning - please consider moving SDN inside rpi.denoise
[0:03:45.861529761] [3023] INFO RPI vc4.cpp:447 Registered camera /base/soc/i2c0mux/i2c@1/ov5647@36 to Unicam device /dev/media3 and ISP device /dev/media0
[0:03:45.861641951] [3023] INFO RPI pipeline_base.cpp:1121 Using configuration file ‘/usr/share/libcamera/pipeline/rpi/vc4/rpi_apps.yaml’
Made X/EGL preview window
Mode selection for 1296:972:12:P
SGBRG10_CSI2P,640x480/0 - Score: 3296
SGBRG10_CSI2P,1296x972/0 - Score: 1000
SGBRG10_CSI2P,1920x1080/0 - Score: 1349.67
SGBRG10_CSI2P,2592x1944/0 - Score: 1567
Stream configuration adjusted
[0:03:46.345014940] [3014] INFO Camera camera.cpp:1202 configuring streams: (0) 1296x972-YUV420 (1) 1296x972-SGBRG10_CSI2P
[0:03:46.346184723] [3023] INFO RPI vc4.cpp:622 Sensor: /base/soc/i2c0mux/i2c@1/ov5647@36 - Selected sensor format: 1296x972-SGBRG10_1X10 - Selected unicam format: 1296x972-pGAA
[0:03:47.477688856] [3023] WARN V4L2 v4l2_videodevice.cpp:2150 /dev/video0[13:cap]: Dequeue timer of 1000000.00us has expired!
[0:03:47.477871233] [3023] ERROR RPI pipeline_base.cpp:1367 Camera frontend has timed out!
[0:03:47.477887548] [3023] ERROR RPI pipeline_base.cpp:1368 Please check that your camera sensor connector is attached securely.
[0:03:47.477904901] [3023] ERROR RPI pipeline_base.cpp:1369 Alternatively, try another cable and/or sensor.
ERROR: Device timeout detected, attempting a restart!!!
^C
:~/picar-x/example $ sudo python3 9.record_video.py
vilib 0.3.15 launching …
picamera2 0.3.25
Imgshow start …
Web display on:
http://192.168.45.67:9000/mjpg
Starting web streaming …
- Serving Flask app ‘vilib.vilib’
- Debug mode: off
Press keys on keyboard to control recording:
Q: record/pause/continue
E: stop
Ctrl + C: Quit
[0:04:42.218064544] [3265] ERROR RPI pipeline_base.cpp:1367 Camera frontend has timed out!
[0:04:42.218218040] [3265] ERROR RPI pipeline_base.cpp:1368 Please check that your camera sensor connector is attached securely.
[0:04:42.218259182] [3265] ERROR RPI pipeline_base.cpp:1369 Alternatively, try another cable and/or sensor.
Error on request:
Traceback (most recent call last):
File “/usr/lib/python3/dist-packages/werkzeug/serving.py”, line 335, in run_wsgi
execute(self.server.app)
File “/usr/lib/python3/dist-packages/werkzeug/serving.py”, line 324, in execute
for data in application_iter:
File “/usr/lib/python3/dist-packages/werkzeug/wsgi.py”, line 500, in next
return self._next()
^^^^^^^^^^^^
File “/usr/lib/python3/dist-packages/werkzeug/wrappers/response.py”, line 50, in _iter_encoded
for item in iterable:
File “/usr/local/lib/python3.11/dist-packages/vilib/vilib.py”, line 88, in gen
frame = get_frame()
^^^^^^^^^^^
File “/usr/local/lib/python3.11/dist-packages/vilib/vilib.py”, line 70, in get_frame
return cv2.imencode(‘.jpg’, Vilib.flask_img)[1].tobytes()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cv2.error: OpenCV(4.11.0) 
error: (-5:Bad argument) in function ‘imencode’
Overload resolution failed:
- img is not a numpy array, neither a scalar
- Expected Ptrcv::UMat for argument ‘img’
Traceback (most recent call last):
File “/home/tqcs/picar-x/example/9.record_video.py”, line 68, in
main()
File “/home/tqcs/picar-x/example/9.record_video.py”, line 31, in main
key = readchar.readkey()
^^^^^^^^^^^^^^^^^^
File “/usr/local/lib/python3.11/dist-packages/readchar/_posix_read.py”, line 37, in readkey
