Simultaneously access of 2 device files of the same camera

USB UVC Webcams
1

For some other cameras, I can have 2 processes access 2 different device files of the same camera
For example Process1 can access /dev/video0 for color stream and Process2 can access /dev/video0 for b/w stream so that they can do 2 different things with those streams

For the USB UVC cameras, is there a way to support it?

  1. Where did you get the camera module(s)?

  2. Model number of the product(s)?

  3. What hardware/platform were you working on?

  4. Instructions you have followed. (link/manual/etc.)

  5. Problems you were having?

  6. The dmesg log from your hardware?

  7. Troubleshooting attempts you’ve made?

  8. What help do you need?

2

@camerauser4321

No.
Video0 does not support fetching two different streams simultaneously.

You can use the main thread to fetch the data, and then use the sub-thread to convert it into a grayscale image using opencv.