FFmpeg is exiting with code 1 no matter what I try
**Describe the bug**
I have been messing with this plugin for about a week and just can't get it to work properly for my use case. I have a RTSP server that I use as a "media server" of sorts and have been trying to watch some of my media library in HomeKit, just as a test. I have also tried piping the video from a file on the Homebridge server, also leading to the same error. FFmpeg always exits with `FFmpeg exited with code: 1 and signal: null`.

**To Reproduce**
1. Install Homebridge on 1 of the following:
- macOS
- Ubuntu on Intel
- Ubuntu on Raspberry Pi
2. Install `homebridge-camera-ui`
3. Setup a new camera, using either an RTSP server or a file as input
4. Notice the camera plays back in the Homebridge UI and the Camera UI, but says No Response in HomeKit. 

**Expected behavior**
FFmpeg should spawn correctly to forward the video to the HomeKit device. 

**Logs**
If available, attach the log where the bug is vissible
```
[5/1/2023, 11:39:33 PM] [CameraUI] Test1: Start stream requested: 1280x720, 30 fps, 299 kbps
[5/1/2023, 11:39:33 PM] [CameraUI] Test1: Incoming ping request for: /home/homebridge/video.mp4 - Timeout: 1s
[5/1/2023, 11:39:33 PM] [CameraUI] Test1: Pinging /home/homebridge/video.mp4 - successfull
[5/1/2023, 11:39:33 PM] [CameraUI] Test1: Starting video stream: 1280x720, 20 fps, 299 kbps 
[5/1/2023, 11:39:33 PM] [CameraUI] Test1: Stream command: /usr/bin/ffmpeg -hide_banner -re -i /home/homebridge/video.mp4 -an -sn -dn -r 20 -vcodec libx264 -pix_fmt yuv420p -color_range mpeg -f rawvideo -preset ultrafast -tune zerolatency -b:v 299k -bufsize 598k -maxrate 299k -payload_type 99 -ssrc 16396842 -f rtp -srtp_out_suite AES_CM_128_HMAC_SHA1_80 -srtp_out_params 2BDbufSKYaoMGxrBMf52xTZo55ceSUJ45thN9Fxz 'srtp://ADDRESS:52949?rtcpport=52949&pkt_size=1318' -progress pipe:1
[5/1/2023, 11:39:33 PM] [CameraUI]  ERROR  Test1: FFmpeg exited with code: 1 and signal: null
[5/1/2023, 11:39:33 PM] [CameraUI] Test1: Stopped video stream.
```

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Environment**
- Node.js Version: v18.13.0
- Homebridge Version: v1.0.33
- Camera UI Version: v5.0.27
- Operating System: Occurs on macOS **and** Ubuntu
- Browser: Safari, Firefox (though it's not a browser problem)
