A videoFilter is defined, but the copy vcodec is being used. This will be ignored.
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**Describe The Problem:**
<!-- A clear and concise description of what the bug is. -->
I have defined a videofilter to change the scale to 16:9, the codec is set to copy to improve the performance. My hikvision camera only gives 640X480 as 2nd stream, and it needs to be converted to 640X360 to have proper display. This used to work in the older version of the plugin, and I'd like to avoid transcoding if possible
**To Reproduce:**
<!-- Steps to reproduce the behavior. -->
When vcodec is set to "copy" and videofilter is set to "scale=640:360"
            {
                    "name": "Kitchen Camera",
                    "motion": true,
                    "motionTimeout": 10,
                    "videoConfig": {
                        "source": "-rtsp_transport tcp -re -i rtsp://admin:xxxxxxxx@192.168.1.25:554/Streaming/Channels/102/",
                        "stillImageSource": "-i http://admin:xxxxxxxx@192.168.1.25:80/Streaming/Channels/1/picture",
                        "maxStreams": 2,
                        "vcodec": "copy",
                        "packetSize": 188,
                        "videoFilter": "scale=640:360",
                        "audio": true,
                        "debug": false
                    }
                }
**Logs:**
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WARNING: A videoFilter is defined, but the copy vcodec is being used. This will be ignored.
```
Show the Homebridge logs here.
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```

**Homebridge Config:**
            {
                    "name": "Kitchen Camera",
                    "motion": true,
                    "motionTimeout": 10,
                    "videoConfig": {
                        "source": "-rtsp_transport tcp -re -i rtsp://admin:xxxxxxxx@192.168.1.25:554/Streaming/Channels/102/",
                        "stillImageSource": "-i http://admin:xxxxxxxx@192.168.1.25:80/Streaming/Channels/1/picture",
                        "maxStreams": 2,
                        "vcodec": "copy",
                        "packetSize": 188,
                        "videoFilter": "scale=640:360",
                        "audio": true,
                        "debug": false
                    }
                }
```json
Show your homebridge config.json here.
Remove any sensitive information, such as your homebridge-gsh / google-smarthome token.
```

**Screenshots:**
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**Environment:**

* **Node.js Version**: 14.17.1
* **NPM Version**: 6.14.13
* **Homebridge Version**: 1.3.4
* **Homebridge Camera FFmpeg Version**: 3.1.2
* **Homebridge Config UI X Plugin Version**: 4.41.2
* **Operating System**: Docker 

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