Clarification about motion masks

[selmaohneh]

Hi!
I just want to install my second IP camera and integrate it into frigate.

I noticed that the motion.mask config entry is not camera specific. So the mask of my first camera is automatically applied to my now new second camera. But that's not what I want. The new camera will have a totally different motion mask.

What's the why to define different masks for different cameras? Couldn't find an example in the docs, neither in the masks nor the camera section.

https://docs.frigate.video/configuration/masks
https://docs.frigate.video/configuration/cameras

Thanks in advance for any help!

[NickM-27]

The motion -> mask can be "overridden at the camera level" meaning there is no specific example because it is just meant to be applied to the camera. See the below example:

cameras:
  camera_1:
    ffmpeg:
      ...
    motion:
      mask: ...,...,...,...

  camera_2:
    ffmpeg:
      ...
    motion:
      mask: ...,...,...,...

[NickM-27]

I've never seen this, I have multiple cameras and all are having their one mask. Can you please show screenshots of the mask editor so it's clear where the mask should be vs what is shown.

[selmaohneh]

This looks strange. I clearly only have a single mask in the corner. Nevertheless I have 3 items in the mask?

The other camera shows the exact same entries! So the mask creator editor seems to show all masks!

These are the debug views with motions masks enabled for the config I wrote in my last comment:

Conclusion: Looks like frigate overwrote my config and put the mask from the first camera to the second camera as well.

[blakeblackshear]

Frigate never writes back to the config file. There isn't code anywhere in the entire project to do that.

[selmaohneh]

That was just my first guess because it just looked like it. Are there other things I could try?

[NickM-27]

I would just stop frigate and cut a bit out at a time and see what changes. I figure this is a weird character or something as I have 4 cameras all with different masks and never seen this.