RuntimeError: Could not initialize camera. Please see error trace

Autonomous Machines Jetson & Embedded Systems Jetson Nano
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1

I am currently following along with the getting started with AI Jetson nano course and I came across a problem with my USB camera. I am currently on the HEllO Camera part of the course on Jupiter Lab and when I get to the part where I run this code:

from jetcam.usb_camera import USBCamera

#TODO change capture_device if incorrect for your system
camera = USBCamera(width=224, height=224, capture_width=640, capture_height=480, capture_device=0)

I get this :

---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
/usr/local/lib/python3.6/dist-packages/jetcam-0.0.0-py3.6.egg/jetcam/usb_camera.py in __init__(self, *args, **kwargs)
     23             if not re:
---> 24                 raise RuntimeError('Could not read image from camera.')
     25 

RuntimeError: Could not read image from  camera.

During handling of the above exception, another exception occurred:

RuntimeError                              Traceback (most recent call last)
<ipython-input-2-5a6744da9a88> in <module>
      2 
      3 #TODO change capture_device if incorrect for your system
----> 4 camera = USBCamera(width=224, height=224, capture_width=640, capture_height=480, capture_device=0)

/usr/local/lib/python3.6/dist-packages/jetcam-0.0.0-py3.6.egg/jetcam/usb_camera.py in __init__(self, *args, **kwargs)
     26         except:
     27             raise RuntimeError(
---> 28                 'Could not initialize camera.  Please see error trace.')
     29 
     30         atexit.register(self.cap.release)

RuntimeError: Could not initialize camera.  Please see error trace.

I have even tried running this in the command prompt to see if I could turn it on and use it through Gstreamer:

gst-launch-1.0 -v v4l2src device=/dev/video0 ! jpegdec ! video/x-raw,framerate=30/1,width=1280,height=720 ! videoconvert ! xvimagesink

But got this instead don’t know if this relates to what’s going on in Jupyter lab:


Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
ERROR: from element /GstPipeline:pipeline0/GstXvImageSink:xvimagesink0: Could not initialise Xv output
Additional debug info:
xvimagesink.c(1773): gst_xv_image_sink_open (): /GstPipeline:pipeline0/GstXvImageSink:xvimagesink0:
Could not open display (null)
Setting pipeline to NULL ...
Freeing pipeline ...[spoiler]This text will be blurred[/spoiler]
3

Hi,
Please run $ v4l2-ctl --list-formats-ext to get supported formats of the camera. And configure exact width,height,framerate to caps. Please check steps in Jetson Nano FAQ
Q: I have a USB camera. How can I launch it on Jetson Nano?

4

I figured it out. My camera isn’t supported.

6

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