Tutorial: creating an edge app. Unable to open video capture for device 0.

[johnhooft]

Hello!

I am currently working through the tutorial for creating an edge app, my environment is a Wild Sage Node.

When attempting to accesses the camera with with Camera() as camera: I get an error:

using backwards compatible implementation of time_ns [ WARN:0@0.322] global cap_v4l.cpp:982 open VIDEOIO(V4L2:/dev/video0): can't open camera by index [ERROR:0@0.323] global obsensor_uvc_stream_channel.cpp:156 getStreamChannelGroup Camera index out of range Traceback (most recent call last): File "main.py", line 24, in <module> main() File "main.py", line 13, in main with Camera() as camera: File "/home/waggle/.local/lib/python3.6/site-packages/waggle/data/vision.py", line 110, in __enter__ self.capture.__enter__() File "/home/waggle/.local/lib/python3.6/site-packages/waggle/data/vision.py", line 136, in __enter__ f"unable to open video capture for device {self.device!r}" RuntimeError: unable to open video capture for device 0

I have latest version of pywaggle installed.

[seanshahkarami]

Hi John!

You are on part 2 of the tutorial, correct? If so, can you confirm that running the tutorial code works on your own machine?

If that works and you finish part 2 on your machine, then part 3 should address this specific issues once it introduces pluginctl and using a specific camera.

[johnhooft]

Ah didn't realize I was supposed to be running the first parts locally, thanks for the help!

[seanshahkarami]

No problem - I'll double check the wording on that to make it more clear.