Snapshot works, live stream fails
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**Describe The Problem:**
Snapshot works, live stream fails. Log as shown below.

**To Reproduce:**
Try to stream video from Home.app

**Logs:**
[11/14/2020, 9:51:07 AM] [Camera FFmpeg] [Backyard] Starting video stream: 1280 x 720, 30 fps, 299 kbps
[11/14/2020, 9:51:10 AM] [Camera FFmpeg] [Backyard] FFmpeg exited with code: 1 and signal: null (Error)
[11/14/2020, 9:51:10 AM] [Camera FFmpeg] [Backyard] Stopped video stream.

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

**Homebridge Config:**

```json
{
    "name": "Camera FFmpeg",
    "platform": "Camera-ffmpeg",
    "cameras": [{
      "name": "Driveway",
      "manufacturer": "Reolink",
      "model": "RLC-410",
      "motion": false,
      "videoConfig": {
        "source": "-re -i rtmp://192.168.1.12/bcs/channel0_main.bcs?channel=0&stream=0&user=admin&password=Password",
        "stillImageSource": "-i http://192.168.1.12/cgi-bin/api.cgi?cmd=Snap&channel=0&rs=wuuPhkmUCeI9WG7C&user=admin&password=Password",
        "maxStreams": 8,
        "maxWidth": 2560,
        "maxHeight": 1440,
        "maxFPS": 30,
        "maxBitrate": 6144,
        "vcodec": "h264_omx",
        "mapvideo": "0:2",
        "audio": true,
        "debug": false
      }
    }, {
      "name": "Backyard",
      "manufacturer": "Reolink",
      "model": "RLC-410",
      "motion": false,
      "videoConfig": {
        "source": "-re -i rtmp://192.168.1.12/bcs/channel1_main.bcs?channel=1&stream=1&user=admin&password=Password",
        "stillImageSource": "-i http://192.168.1.12/cgi-bin/api.cgi?cmd=Snap&channel=1&rs=wuuPhkmUCeI9WG7C&user=admin&password=Password",
        "maxStreams": 8,
        "maxWidth": 2560,
        "maxHeight": 1440,
        "maxFPS": 30,
        "maxBitrate": 6144,
        "vcodec": "h264_omx",
        "mapvideo": "0:2",
        "audio": true,
        "debug": false
      }
    },{
      "name": "Side Yard",
      "manufacturer": "Reolink",
      "model": "RLC-410",
      "motion": false,
      "videoConfig": {
        "source": "-re -i rtmp://192.168.1.12/bcs/channel2_main.bcs?channel=2&stream=2&user=admin&password=Password",
        "stillImageSource": "-i http://192.168.1.12/cgi-bin/api.cgi?cmd=Snap&channel=2&rs=wuuPhkmUCeI9WG7C&user=admin&password=Password",
        "maxStreams": 8,
        "maxWidth": 2560,
        "maxHeight": 1440,
        "maxFPS": 30,
        "maxBitrate": 6144,
        "vcodec": "h264_omx",
        "mapvideo": "0:2",
        "audio": true,
        "debug": false
      }
    },{
      "name": "Patio",
      "manufacturer": "Reolink",
      "model": "RLC-410",
      "motion": false,
      "videoConfig": {
        "source": "-re -i rtmp://192.168.1.12/bcs/channel3_main.bcs?channel=3&stream=3&user=admin&password=Password",
        "stillImageSource": "-i http://192.168.1.12/cgi-bin/api.cgi?cmd=Snap&channel=3&rs=wuuPhkmUCeI9WG7C&user=admin&password=Password",
        "maxStreams": 8,
        "maxWidth": 2560,
        "maxHeight": 1440,
        "maxFPS": 30,
        "maxBitrate": 6144,
        "vcodec": "h264_omx",
        "mapvideo": "0:2",
        "audio": true,
        "debug": false
      }
    },{
      "name": "Inside",
      "manufacturer": "Reolink",
      "model": "RLC-410",
      "motion": false,
      "videoConfig": {
        "source": "-re -i rtmp://192.168.1.12/bcs/channel4_main.bcs?channel=4&stream=4&user=admin&password=Password",
        "stillImageSource": "-i http://192.168.1.12/cgi-bin/api.cgi?cmd=Snap&channel=4&rs=wuuPhkmUCeI9WG7C&user=admin&password=Password",
        "maxStreams": 8,
        "maxWidth": 2560,
        "maxHeight": 1440,
        "maxFPS": 30,
        "maxBitrate": 6144,
        "vcodec": "h264_omx",
        "mapvideo": "0:2",
        "audio": true,
        "debug": false
      }
    }]

}
```

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

**Environment:**

* **Node.js Version**: <!-- node -v -->
* **NPM Version**: <!-- npm -v -->
* **Homebridge Version**: <!-- homebridge -V -->
* **Homebridge Camera FFmpeg Version**:
* **Homebridge Config UI X Plugin Version**:
* **Operating System**: <!-- Raspbian / Ubuntu / Debian / Windows / macOS / Docker -->


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