Error When Trying To Run The Raspberry Pi Camera In OpenCV 4.1.1

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hello,

first of all I use Python 3.6.9 and OpenCV 4.1.1 on my Jetson Nano.

I try to setup the Raspberry Pi Cam on the Nano. I watched all the videos of Paul McWhorter and made all the steps.

import cv2
print(cv2.__version__)
dispW=320
dispH=240
flip=2
camSet='nvarguscamerasrc !  video/x-raw(memory:NVMM), width=3264, height=2464, format=NV12, framerate=28/1 ! nvvidconv flip-method='+str(flip)+' ! video/x-raw, width='+str(dispW)+', height='+str(dispH)+', format=BGRx ! videoconvert ! video/x-raw, format=BGR ! appsink'
cam=cv2.VideoCapture(camSet)
while True:
    ret, frame=cam.read()
    cv2.imshow('piCam',frame)
    if cv2.waitKey(1)==ord('q'):
        break
cam.release()
cv2.destroyAllWindows()

This is the error I get when I execute the program:

Error generated. /dvs/git/dirty/git-master_linux/multimedia/nvgstreamer/gst-nvarguscamera/gstnvarguscamerasrc.cpp, execute:532 No cameras available
[ WARN:0] global /home/nvidia/host/build_opencv/nv_opencv/modules/videoio/src/cap_gstreamer.cpp (933) open OpenCV | GStreamer warning: Cannot query video position: status=0, value=-1, duration=-1
Traceback (most recent call last):
  File "/home/aykiri/Desktop/pyPro/openCV1.py", line 10, in <module>
    cv2.imshow('piCam',frame)
cv2.error: OpenCV(4.1.1) /home/nvidia/host/build_opencv/nv_opencv/modules/highgui/src/window.cpp:352: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'imshow'

I think the problem is that the frame is empty. How can I fix this problem?

2

Hello,

I watched the Youtube-Video of jetsonHacks where he connects the Raspberry Pi Cam to the Jetson Nano. I did the same and it worked. I am able to open the cam via gst.

But if I want to open the cam via the Python Environment I get a new error:

4.1.1
GST_ARGUS: Creating output stream
CONSUMER: Waiting until producer is connected...
GST_ARGUS: Available Sensor modes :
GST_ARGUS: 3264 x 2464 FR = 21.000000 fps Duration = 47619048 ; Analog Gain range min 1.000000, max 10.625000; Exposure Range min 13000, max 683709000;

GST_ARGUS: 3264 x 1848 FR = 28.000001 fps Duration = 35714284 ; Analog Gain range min 1.000000, max 10.625000; Exposure Range min 13000, max 683709000;

GST_ARGUS: 1920 x 1080 FR = 29.999999 fps Duration = 33333334 ; Analog Gain range min 1.000000, max 10.625000; Exposure Range min 13000, max 683709000;

GST_ARGUS: 1280 x 720 FR = 59.999999 fps Duration = 16666667 ; Analog Gain range min 1.000000, max 10.625000; Exposure Range min 13000, max 683709000;

GST_ARGUS: 1280 x 720 FR = 120.000005 fps Duration = 8333333 ; Analog Gain range min 1.000000, max 10.625000; Exposure Range min 13000, max 683709000;

Error generated. /dvs/git/dirty/git-master_linux/multimedia/nvgstreamer/gst-nvarguscamera/gstnvarguscamerasrc.cpp, threadExecute:243 Stream failed to connect.
Error generated. /dvs/git/dirty/git-master_linux/multimedia/nvgstreamer/gst-nvarguscamera/gstnvarguscamerasrc.cpp, threadFunction:177 (propagating)
(Argus) Error InvalidState:  (propagating from src/eglstream/FrameConsumerImpl.cpp, function streamEventThread(), line 135)
(Argus) Error InvalidState:  (propagating from src/eglstream/FrameConsumerImpl.cpp, function streamEventThreadStatic(), line 177)
Error generated. /dvs/git/dirty/git-master_linux/multimedia/nvgstreamer/gst-nvarguscamera/gstnvarguscamerasrc.cpp, execute:654 Frame Rate specified is greater than supported
[ WARN:0] global /home/nvidia/host/build_opencv/nv_opencv/modules/videoio/src/cap_gstreamer.cpp (933) open OpenCV | GStreamer warning: Cannot query video position: status=0, value=-1, duration=-1
Traceback (most recent call last):
  File "/home/aykiri/Desktop/pyPro/openCV1.py", line 10, in <module>
    cv2.imshow('piCam',frame)
cv2.error: OpenCV(4.1.1) /home/nvidia/host/build_opencv/nv_opencv/modules/highgui/src/window.cpp:352: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'imshow'

Segmentation fault (core dumped)

I would really love to open the cam in my environment like PaulMcWhorter. How can I fix this error?

3

Hi kerem.kenan,

Not sure if this is still an issue, please try with the latest JetPack 4.4 DP to see if issue still present.