ffmpeg not overwriting files automatically
<!-- You must use the issue template below -->

**Describe The Problem:**
<!-- A clear and concise description of what the bug is. -->

8/11/2023, 11:00:06 PM] [Camera FFmpeg] [Intersection 110-00-110] File '299k' already exists. Overwrite? [y/N] [fatal] Not overwriting - exiting
[8/11/2023, 11:00:06 PM] [Camera FFmpeg] [Intersection 110-00-110] FFmpeg exited with code: 1 and signal: null (Error)
[8/11/2023, 11:00:06 PM] [Camera FFmpeg] [Intersection 110-00-110] Stopped video stream.

**To Reproduce:**
<!-- Steps to reproduce the behavior. -->

cameras": [
                {
                    "name": "Intersection 110-00-110",
                    "manufacturer": "Dahua NVR",
                    "model": "IPC-HDBW2831R-ZAS",
                    "unbridge": true,
                    "videoConfig": {
                        "source": "-i rtsp://guest:85Elliott@192.168.1.29:554/cam/realmonitor?channel=1&subtype=0",
                        "stillImageSource": "-i http://guest:85Elliott@192.168.1.29/cgi-bin/snapshot.cgi?channel=1",
                        "maxWidth": 0,
                        "maxHeight": 0,
                        "maxFPS": 0,
                        "forceMax": false,
                        "vcodec": "h264_videotoolbox",
                        "encoderOptions": "-realtime ",
                        "debug": true
                    }
                },

**Logs:**
<!-- Bug reports that do not contain logs may be closed without warning. -->

```
Show the Homebridge logs here.
Remove any sensitive information.
```

**Homebridge Config:**

```json
Show your homebridge config.json here.
Remove any sensitive information, such as your homebridge-gsh / google-smarthome token.
```

**Screenshots:**
<!-- If applicable, add screenshots to help explain your problem. -->

**Environment:**

* **Node.js Version**: v17.16.1<!-- node -v -->
* **NPM Version**: 9.6.7<!-- npm -v -->
* **Homebridge Version**: 1.61.<!-- homebridge -V -->
* **Homebridge Camera FFmpeg Version**:

ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
  built with Apple clang version 14.0.3 (clang-1403.0.22.14.1)

* **Homebridge Config UI X Plugin Version**:
V4.50.4
* **Operating System**: <!-- Raspbian / Ubuntu / Debian / Windows / macOS / Docker -->
macOS 14.0
M2 mac-mini 

<!-- Click the "Preview" tab before you submit to ensure the formatting is correct. -->