Could not initialize camera

I always get the error for this code even I reboot the jetson nano. I am using Jetson Nano IMX219-160 Camera.
Thank you!

Package: nvidia-jetpack
Version: 4.5.1-b17
Architecture: arm64
Maintainer: NVIDIA Corporation

#url="http://192.168.86.46:8080/stream_viewer?topic=/camera/rgb/image_raw"
url_rgb="http://192.168.86.46:8080/stream?topic=/camera/rgb/image_raw"
url="http://192.168.86.46:8080/stream?topic=/camera/depth/image"

from jetbot import Camera
from IPython.display import display
import ipywidgets.widgets as widgets
from jetbot import bgr8_to_jpeg

camera = Camera.instance(width=224, height=224, usb=1, url=url)
camera_rgb = Camera.instance(width=224, height=224, usb=1, url=url_rgb)

I found that when I run this code

camera_rgb = Camera.instance(width=200, height=200, usb=1, url=url_rgb)

It shows me the error

---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
/usr/local/lib/python3.6/dist-packages/jetbot-0.4.3-py3.6.egg/jetbot/camera/opencv_gst_camera.py in __init__(self, *args, **kwargs)
     29             if not re:
---> 30                 raise RuntimeError('Could not read image from camera.')
     31 

RuntimeError: Could not read image from camera.

During handling of the above exception, another exception occurred:

RuntimeError                              Traceback (most recent call last)
<ipython-input-11-956c95e0cfa8> in <module>
----> 1 camera_rgb = Camera.instance(width=200, height=200, usb=1, url=url_rgb)

/usr/local/lib/python3.6/dist-packages/jetbot-0.4.3-py3.6.egg/jetbot/camera/opencv_gst_camera.py in instance(*args, **kwargs)
     70     @staticmethod
     71     def instance(*args, **kwargs):
---> 72         return OpenCvGstCamera(*args, **kwargs)

/usr/local/lib/python3.6/dist-packages/jetbot-0.4.3-py3.6.egg/jetbot/camera/opencv_gst_camera.py in __init__(self, *args, **kwargs)
     35             self.stop()
     36             raise RuntimeError(
---> 37                 'Could not initialize camera.  Please see error trace.')
     38 
     39         atexit.register(self.stop)

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

Could you check if below command working well?

export DISPLAY=:0
nvgstcapture-1.0

It shows me that

jetbot@jetbot:~$ export DISPLAY=:0
jetbot@jetbot:~$ nvgstcapture-1.0
Encoder null, cannot set bitrate!
Encoder Profile = High
Supported resolutions in case of ARGUS Camera
  (2) : 640x480
  (3) : 1280x720
  (4) : 1920x1080
  (5) : 2104x1560
  (6) : 2592x1944
  (7) : 2616x1472
  (8) : 3840x2160
  (9) : 3896x2192
  (10): 4208x3120
  (11): 5632x3168
  (12): 5632x4224

Runtime ARGUS Camera Commands:

  Help : 'h'
  Quit : 'q'
  Set Capture Mode:
      mo:<val>
          (1): image
          (2): video
  Get Capture Mode:
      gmo
  Set sensor orientation:
      so:<val>
          (0): none
          (1): Rotate counter-clockwise 90 degrees
          (2): Rotate 180 degrees
          (3): Rotate clockwise 90 degrees
  Get sensor orientation:
      gso
  Set sensor mode:
      smo:<val> e.g., smo:1
  Get sensor mode:
      gsmo
  Set Whitebalance Mode:
      wb:<val>
          (0): off
          (1): auto
          (2): incandescent
          (3): fluorescent
          (4): warm-fluorescent
          (5): daylight
          (6): cloudy-daylight
          (7): twilight
          (8): shade
          (9): manual
  Get Whitebalance Mode:
      gwb
  Set Saturation (0 to 2):
      st:<val> e.g., st:1.25
  Get Saturation:
      gst
  Set Exposure Compensation (-2 to 2):
      ec:<val> e.g., ec:-2
  Get Exposure Compensation:
      gec
  Set Auto Whitebalance Lock:
      awbl:<val> e.g., awbl:0
  Get Auto Whitebalance Lock:
      awbl
  Set Auto Exposure Lock:
      ael:<val> e.g., ael:0
  Get Auto Exposure Lock:
      gael
  Set TNR Mode:
      tnrm:<val> e.g., tnrm:1
          (0): OFF
          (1): FAST
          (2): HIGH QUALITY
  Get TNR Mode:
      gtnrm
  Set TNR Strength (-1 to 1):
      tnrs:<val> e.g., tnrs:0.5
  Get TNR Strength:
      gtnrs
  Set EE Mode:
      eem:<val> e.g., eem:1
          (0): OFF
          (1): FAST
          (2): HIGH QUALITY
  Get EE Mode:
      geem
  Set EE Strength (-1 to 1):
      ees:<val> e.g., ees:0.5
  Get EE Strength:
      gees
  Set Auto Exposure Anti-Banding (0 to 3):
      aeab:<val> e.g., aeab:2
          (0): OFF
          (1): MODE AUTO
          (2): MODE 50HZ
          (3): MODE 60HZ
  Get Auto Exposure Anti-Banding:
      gaeab
  Set Gain Range:
      gr:<val><space><val> e.g., gr:1 16
  Get Gain Range:
      ggr
  Set Exposure Time Range:
      etr:<val><space><val> e.g., etr:34000 35000
  Get Exposure Time Range:
      getr
  Set ISP Digital Gain Range:
      dgr:<val><space><val> e.g., dgr:2 152
  Get ISP Digital Gain Range:
      gdgr
  Capture: enter 'j' OR
           followed by a timer (e.g., jx5000, capture after 5 seconds) OR
           followed by multishot count (e.g., j:6, capture 6 images)
           timer/multihot values are optional, capture defaults to single shot with timer=0s
  Start Recording : enter '1'
  Stop Recording  : enter '0'
  Video snapshot  : enter '2' (While recording video)
  Get Preview Resolution:
      gpcr
  Get Image Capture Resolution:
      gicr
  Get Video Capture Resolution:
      gvcr


Runtime encoder configuration options:

  Set Encoding Bit-rate(in bytes):
      br:<val> e.g., br:4000000
  Get Encoding Bit-rate(in bytes):
      gbr
  Set Encoding Profile(only for H.264):
      ep:<val> e.g., ep:1
          (0): Baseline
          (1): Main
          (2): High
  Get Encoding Profile(only for H.264):
      gep
  Force IDR Frame on video Encoder(only for H.264):
      Enter 'f' 


bitrate = 4000000
Encoder Profile = High
Encoder control-rate = 1
Encoder EnableTwopassCBR = 0
Opening in BLOCKING MODE
Opening in BLOCKING MODE 
** Message: 09:38:40.510: <main:4670> iterating capture loop ....
NvMMLiteOpen : Block : BlockType = 4 
===== NVMEDIA: NVENC =====
NvMMLiteBlockCreate : Block : BlockType = 4 
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  = 5 
   Output Stream W = 1280 H = 720 
   seconds to Run    = 0 
   Frame Rate = 120.000005 
GST_ARGUS: Setup Complete, Starting captures for 0 seconds
GST_ARGUS: Starting repeat capture requests.
CONSUMER: Producer has connected; continuing.
^C** Message: 09:42:19.616: <_intr_handler:4261> User Interrupted.. 

Terminating the camera pipeline ...
GST_ARGUS: Cleaning up
CONSUMER: Done Success
GST_ARGUS: Done Success
** Message: 09:42:19.839: <main:4680> Capture completed
** Message: 09:42:19.839: <main:4729> Camera application will now exit

Looks like the CSI camera working well. Looks like the python code to launch USB camera instead of CSI cam.