Multicam

I am trying to run two cameras on mainsail.
Unfortunately, the first camera reports "no signal", although you can see the changing fps.
Everything is well configured but one camera is not working. If I disconnect the working one, the other starts working. I don't know what else I can do.

[crowsnest]
log_path: ~/printer_data/logs/crowsnest.log
log_level: verbose # Valid Options are quiet/verbose/debug
delete_log: false # Deletes log on every restart, if set to true

[cam 1]
mode: mjpg # mjpg/rtsp
port: 8080 # Port
device: /dev/v4l/by-id/usb-GENERAL_2K_HD_Camera-video-index0 # See Log for available ...
resolution: 800x600 # widthxheight format
max_fps: 30 # If Hardware Supports this it will be forced, otherwise ignored/coerced.
#custom_flags: # You can run the Stream Services with custom flags.
#v4l2ctl: # Add v4l2-ctl parameters to setup your camera, see Log what your cam is capable of.

[cam 2]
mode: mjpg # mjpg/rtsp
port: 8081 # Port
device: /dev/v4l/by-id/usb-Sunplus_IT_Co_Trust_USB_Camera_20200707002-video-index0 # See Log for available ...
resolution: 800x600 # widthxheight format
max_fps: 30 # If Hardware Supports this it will be forced, otherwise ignored/coerced.

Start by reviewing ~/printer_data/logs/crowsnest.log at verbose level and compare the [cam 1] and [cam 2] configurations, including their device paths, ports, resolutions, and frame rates. Reproduce the setup with both cameras connected; done means both configured camera streams work simultaneously without a no-signal result.

Written by the indexing model from the issue text.