config.schema.json wrong defaults
Hi,

thanks for this great tool! till date, used FFMPEG plugin for my cameras to be integrated into homekit, now with HSV in BETA 1.4.0, tried out your plugin and it's great!

In total, I work with 3 Cameras, of which 2 work under RTSP and integrate easily. Remaining camera operates with MJPEG and this cannot be changed in my setup. FFMPEG allows for this integration and it worked ok on there.

When I try to enter the MJPEG camera into camera.ui on Homebridge, the camera won't surface properly but throw errors on Camera.ui & Homebridge log, speficially regaring -stimeout and -rtsp_transport.

Took a look at the config.json with the assumption that these entries would simply not be recognizes for MJPEG streams so wanted to delete them so they would not be tried to read. That worked for me (so delting -stimeout and -rtsp_transport).

In the plugin config though, rtsp_transport is a mandatory field and -stimeout automatically repopulates with 10.
Would it make sense to make these entries conditional to RTSP streams only and for MJPEG (which works with FFMPEG), do not make these entries to the config.json?

Let me know if you need more/if this helps. Again, great work!

**Environment**
- Node.js Version: v16.13.1
- Homebridge Version: v1.4.0. beta 7

- Camera UI Version: v5.0.9
- Operating System: Raspbian
