Getting error: frame height does not match the height of webcam device: 540!=480

[bendavis78]

Here's my config.yml:

segmentation_threshold: 0.7
blur: 5
erode: 10
dilate: 10
virtual_video_device: "/dev/video2"
real_video_device: "/dev/video0"
average_masks: 2
mjpeg: False
layers:
  - "empty": [["image", "background.jpg"]]
  - "foreground": []

When i run ./virtual_webcam.py, I get the following error:

$ ./virtual_webcam.py
Reloading config.
Model: mobilenet (multiplier=0.5, stride=16)
Loading model...
done.
Traceback (most recent call last):
  File "/home/ben/.local/src/virtual_webcam_background/./virtual_webcam.py", line 315, in <module>
    mainloop()
  File "/home/ben/.local/src/virtual_webcam_background/./virtual_webcam.py", line 309, in mainloop
    fakewebcam.schedule_frame(frame)
  File "/home/ben/.local/lib/python3.9/site-packages/pyfakewebcam/pyfakewebcam.py", line 68, in schedule_frame
    raise Exception('frame height does not match the height of webcam device: {}!={}\n'.format(self._settings.fmt.pix.height, frame.shape[0]))
Exception: frame height does not match the height of webcam device: 540!=480

[allo-]

What is the size of background.jpg? Try to scale/crop it to the resolution of your webcam.

[allo-]

See also #62. Maybe you have the same issue?

[z80z80z80]

I've experienced a similar issue and was able to fix it for myself. It turns out after creating the v4l2loopback device and using it once, you can't change the resolution without hitting this error.

My process for resolution changes is:

• make change in config.yaml
• close all applications that use the camera
• sudo modprobe -r v4l2loopback
• sudo modprobe v4l2loopback devices=1 max_buffers=2 exclusive_caps=1 card_label="VirtualCam"
• python virtual_webcam.py