Unable to open camera

acampo7 · February 21, 2023, 8:44am

Hello team,
I made a simple script to open an IMX camera on my Jetson Nano. My version:
OpenCV: 4.51
JetPack: 4.5

I’ve acquired two IMX219 which I want to use for face recognition. I am using Haar cascade for face detection and before I implement the recognition logic I wanted to test the opening of the camera and the face detection.
I began opening the camera using any of these commands:
gst-launch-1.0 nvarguscamerasrc ! 'video/x-raw(memory:NVMM),width=1920,height=1080,format=NV12' ! nvvidconv ! fpsdisplaysink video-sink=fakesink --verbose

Output:


Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstFakeSink:fakesink0: sync = true
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstNvArgusCameraSrc:nvarguscamerasrc0.GstPad:src: caps = video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)NV12, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)NV12, framerate=(fraction)30/1
/GstPipeline:pipeline0/Gstnvvconv:nvvconv0.GstPad:src: caps = video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)NV12, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0.GstGhostPad:sink.GstProxyPad:proxypad0: caps = video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)NV12, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay.GstPad:src: caps = video/x-raw(memory:NVMM, meta:GstVideoOverlayComposition), width=(int)1920, height=(int)1080, format=(string)NV12, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstFakeSink:fakesink0.GstPad:sink: caps = video/x-raw(memory:NVMM, meta:GstVideoOverlayComposition), width=(int)1920, height=(int)1080, format=(string)NV12, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay.GstPad:video_sink: caps = video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)NV12, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0.GstGhostPad:sink: caps = video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)NV12, framerate=(fraction)30/1
/GstPipeline:pipeline0/Gstnvvconv:nvvconv0.GstPad:sink: caps = video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)NV12, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps = video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)NV12, framerate=(fraction)30/1
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: 1640 x 1232 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;

GST_ARGUS: Running with following settings:
   Camera index = 0 
   Camera mode  = 2 
   Output Stream W = 1920 H = 1080 
   seconds to Run    = 0 
   Frame Rate = 29.999999 
GST_ARGUS: Setup Complete, Starting captures for 0 seconds
GST_ARGUS: Starting repeat capture requests.
CONSUMER: Producer has connected; continuing.
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstFakeSink:fakesink0: sync = true
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay: text = rendered: 17, dropped: 0, current: 32.25, average: 32.25
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 17, dropped: 0, current: 32.25, average: 32.25
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay: text = rendered: 33, dropped: 0, current: 30.01, average: 31.12
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 33, dropped: 0, current: 30.01, average: 31.12
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay: text = rendered: 49, dropped: 0, current: 30.01, average: 30.75
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 49, dropped: 0, current: 30.01, average: 30.75
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay: text = rendered: 65, dropped: 0, current: 29.99, average: 30.56
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 65, dropped: 0, current: 29.99, average: 30.56
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay: text = rendered: 81, dropped: 0, current: 30.03, average: 30.45
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 81, dropped: 0, current: 30.03, average: 30.45
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay: text = rendered: 97, dropped: 0, current: 30.01, average: 30.38
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 97, dropped: 0, current: 30.01, average: 30.38
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay: text = rendered: 112, dropped: 0, current: 29.98, average: 30.32
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 112, dropped: 0, current: 29.98, average: 30.32
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay: text = rendered: 128, dropped: 0, current: 30.01, average: 30.28
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 128, dropped: 0, current: 30.01, average: 30.28
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay: text = rendered: 144, dropped: 0, current: 30.02, average: 30.25
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 144, dropped: 0, current: 30.02, average: 30.25
^Chandling interrupt.
Interrupt: Stopping pipeline ...
Execution ended after 0:00:05.757654766
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
CONSUMER: Done Success
GST_ARGUS: Cleaning up
GST_ARGUS: Done Success
Setting pipeline to NULL ...
Freeing pipeline ...

If I run:
nvgstcapture-1.0 --cus-prev-res=1920x1080
Outputs CORRECTLY: the video image

However, when I attempt to open the camera using OpenCV Using the following script:

import cv2

# Set the GStreamer pipeline string
gst_pipeline = 'gst-launch-1.0 nvarguscamerasrc ! video/x-raw(memory:NVMM),width=1920,height=1080,format=NV12 ! nvvidconv ! fpsdisplaysink video-sink=fakesink'

# Initialize the capture object with the GStreamer pipeline
camera = cv2.VideoCapture(gst_pipeline, cv2.CAP_GSTREAMER)

# Check if the camera is open
if not camera.isOpened():
    print("Failed to open camera")
    exit()

# Loop through each frame from the camera
while True:
    # Capture a frame from the camera
    ret, frame = camera.read()

    # Check if the frame was captured successfully
    if not ret:
        print("Failed to capture frame")
        break

    # Display the captured frame
    cv2.imshow("Camera", frame)

    # Check if the user pressed the "q" key
    if cv2.waitKey(1) == ord("q"):
        break

# Release the camera and close the window
camera.release()
cv2.destroyAllWindows()

outputs:
Failed to open the camera with VideoCapture

If I run the command v4l2-ctl --list-devices
the output :

vi-output, imx219 7-0010 (platform:54080000.vi:0):
        /dev/video0

Finally, I ran:

dmesg | grep -iw -e imx219 -e vi

[    1.280772] imx219 7-0010: tegracam sensor driver:imx219_v2.0.6
[    1.305608] imx219 8-0010: tegracam sensor driver:imx219_v2.0.6
[    1.328961] imx219 8-0010: imx219_board_setup: error during i2c read probe (-121)
[    1.329091] imx219 8-0010: board setup failed
[    1.329172] imx219: probe of 8-0010 failed with error -121
[    1.476541] vi 54080000.vi: vi_probe: ++
[    1.478990] vi 54080000.vi: initialized
[    1.480947] vi 54080000.vi: subdev nvcsi--2 bound
[    1.480972] vi 54080000.vi: subdev imx219 7-0010 bound
[    1.481727] vi 54080000.vi: subdev nvcsi--1 bound

Has anyone experienced this error before?
I’ve been struggling with this issue for a week and nothing seems to resolve it.
Any help is appreciated!

mishak · February 21, 2023, 2:01pm

Please try:

gst_pipeline = ("nvarguscamerasrc sensor-mode=2  ! "
        "video/x-raw(memory:NVMM), "
        "width=(int)1920, height=(int)1080, "
        "format=(string)NV12, framerate=(fraction)30/1 ! "
        "nvvidconv flip-method=0 ! "
        "video/x-raw, width=(int)1920, height=(int)1080, format=(string)BGRx ! "
        "videoconvert ! "
        "video/x-raw, format=(string)BGR ! appsink")

mishak · February 21, 2023, 2:10pm

If that works for you, you can convert it into a function.

def gstreamer_pipeline(
    capture_width=1920,
    capture_height=1080,
    display_width=640,
    display_height=480,
    framerate=30,
    flip_method=0,
):
    return (
        "nvarguscamerasrc sensor-mode=2  ! "
        "video/x-raw(memory:NVMM), "
        "width=(int)%d, height=(int)%d, "
        "format=(string)NV12, framerate=(fraction)%d/1 ! "
        "nvvidconv flip-method=%d ! "
        "video/x-raw, width=(int)%d, height=(int)%d, format=(string)BGRx ! "
        "videoconvert ! "
        "video/x-raw, format=(string)BGR ! appsink"
        % (
            capture_width,
            capture_height,
            framerate,
            flip_method,
            display_width,
            display_height,
        )
    )

system · March 7, 2023, 2:10pm

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Unable to open camera

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