Random video stream fails to start with "Socket error: Error"
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**Describe The Problem:**
Randomly through the week, I will not be able to stream the video for any of the cameras for a short duration (a few minutes).

I would see `Socket error: Error` in the logs for any of the cameras I would try to view.

I've ruled out issues with the network or RTSP streams because if I load the RTSP streams manually in VLC, they will all work. Also it would affect all of my cameras pointing to different streams.

After waiting a few minutes, I would be able to successfully view the stream without any other change.

Since the only that differs between my failed and successful attempts are the `rtcpport` or `srtp` ports which look randomized, and the fact that the error is "socket error", I wonder if I'm running into some sort of port conflict with other apps/services running on my server.

<!-- A clear and concise description of what the bug is. -->

**To Reproduce:**
1. Randomly view a camera stream
2. See error

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

```
[25/03/2021, 3:08:57 pm] [Camera FFmpeg] [Front] Video stream requested: 1280 x 720, 30 fps, 299 kbps
[25/03/2021, 3:08:57 pm] [Camera FFmpeg] [Front] Starting video stream: 1280 x 720, 30 fps, 299 kbps (AAC-eld)
[25/03/2021, 3:08:57 pm] [Camera FFmpeg] [Front] Stream command: C:\Users\Long\AppData\Roaming\npm\node_modules\homebridge-camera-ffmpeg\node_modules\ffmpeg-for-homebridge\ffmpeg.exe -i rtsp://XXX@192.168.1.4:554/cam/realmonitor?channel=7&subtype=0 -an -sn -dn -codec:v libx264 -pix_fmt yuv420p -color_range mpeg -r 30 -f rawvideo -preset ultrafast -tune zerolatency -filter:v scale='min(1280,iw)':'min(720,ih)':force_original_aspect_ratio=decrease,scale=trunc(iw/2)*2:trunc(ih/2)*2 -b:v 299k -payload_type 99 -ssrc 15449906 -f rtp -srtp_out_suite AES_CM_128_HMAC_SHA1_80 -srtp_out_params JF7l4xudkzUzmenEU8MH4eJmgwuLVj2ft/YqRqD5 srtp://192.168.1.141:58456?rtcpport=58456&pkt_size=1316 -vn -sn -dn -codec:a libfdk_aac -profile:a aac_eld -flags +global_header -f null -ar 16k -b:a 24k -ac 1 -payload_type 110 -ssrc 14230879 -f rtp -srtp_out_suite AES_CM_128_HMAC_SHA1_80 -srtp_out_params o4swsHRBqo9qSPrvFqJMis03SReauio6XlsJQWs+ srtp://192.168.1.141:64227?rtcpport=64227&pkt_size=188 -loglevel level+verbose -progress pipe:1
[25/03/2021, 3:08:57 pm] [Camera FFmpeg] [Front] Socket error: Error
[25/03/2021, 3:08:57 pm] [Camera FFmpeg] [Front] Stopped video stream.
[25/03/2021, 3:08:57 pm] [Camera FFmpeg] [Front] FFmpeg exited with code: null and signal: SIGKILL (Expected)
[25/03/2021, 3:09:06 pm] [homebridge-camera-ffmpeg] This plugin slows down Homebridge. The write handler for the characteristic 'Selected RTP Stream Configuration' on the accessory 'Front F9B7' didn't respond at all!. Please check that you properly call the callback! See https://git.io/JtMGR for more info.
[25/03/2021, 3:09:06 pm] [Camera FFmpeg] [Front] Stopped video stream.
```

Whereas a few seconds later it would work

```
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] Video stream requested: 1280 x 720, 30 fps, 299 kbps
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] Starting video stream: 1280 x 720, 30 fps, 299 kbps (AAC-eld)
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] Stream command: C:\Users\Long\AppData\Roaming\npm\node_modules\homebridge-camera-ffmpeg\node_modules\ffmpeg-for-homebridge\ffmpeg.exe -i rtsp://XXX@192.168.1.4:554/cam/realmonitor?channel=7&subtype=0 -an -sn -dn -codec:v libx264 -pix_fmt yuv420p -color_range mpeg -r 30 -f rawvideo -preset ultrafast -tune zerolatency -filter:v scale='min(1280,iw)':'min(720,ih)':force_original_aspect_ratio=decrease,scale=trunc(iw/2)*2:trunc(ih/2)*2 -b:v 299k -payload_type 99 -ssrc 6255934 -f rtp -srtp_out_suite AES_CM_128_HMAC_SHA1_80 -srtp_out_params pLbX84olcvQ2rYULpJp5d61a/LvAhGz1XNpPrU0g srtp://192.168.1.141:58252?rtcpport=58252&pkt_size=1316 -vn -sn -dn -codec:a libfdk_aac -profile:a aac_eld -flags +global_header -f null -ar 16k -b:a 24k -ac 1 -payload_type 110 -ssrc 2469502 -f rtp -srtp_out_suite AES_CM_128_HMAC_SHA1_80 -srtp_out_params eWXOJ2sWB2C1JZ2YMJ7SXyksedE3dekG1tlEkNTl srtp://192.168.1.141:49300?rtcpport=49300&pkt_size=188 -loglevel level+verbose -progress pipe:1
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info] ffmpeg version N-96777-gebee808595-ffmpeg-windows-build-helpers Copyright (c) 2000-2020 the FFmpeg developers
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info]   built with gcc 8.3.0 (GCC)
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info]   configuration: --pkg-config=pkg-config --pkg-config-flags=--static --extra-version=ffmpeg-windows-build-helpers --enable-version3 --disable-debug --disable-w32threads --arch=x86_64 --target-os=mingw32 --cross-prefix=/ffmpeg-windows-build-helpers/sandbox/cross_compilers/mingw-w64-x86_64/bin/x86_64-w64-mingw32- --enable-libcaca --enable-gray --enable-libtesseract --enable-fontconfig --enable-gmp --enable-gnutls --enable-libass --enable-libbluray --enable-libbs2b --enable-libflite --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libvorbis --enable-libwebp --enable-libzimg --enable-libzvbi --enable-libmysofa --enable-libopenjpeg --enable-libopenh264 --enable-liblensfun --enable-libvmaf --enable-libsrt --enable-demuxer=dash --enable-libxml2 --enable-opengl --enable-libdav1d --enable-libsvthevc --enable-libaom --enable-libvpx --enable-nvenc --enable-nvdec --extra-libs=-lharfbuzz --extra-libs=-lm --extra-libs=-lpthread --extra-cflags=-DLIBTWOLAME_STATIC --extra-cflags=-DMODPLUG_STATIC --extra-cflags=-DCACA_STATIC --enable-amf --enable-libmfx --enable-gpl --enable-avisynth --enable-frei0r --enable-filter=frei0r --enable-librubberband --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libxavs --enable-avresample --extra-cflags='-mtune=generic' --extra-cflags=-O3 --enable-static --disable-shared --prefix=/ffmpeg-windows-build-helpers/sandbox/cross_compilers/mingw-w64-x86_64/x86_64-w64-mingw32 --enable-nonfree --enable-decklink --enable-libfdk-aac
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info]   libavutil      56. 41.100 / 56. 41.100
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info]   libavcodec     58. 70.100 / 58. 70.100
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info]   libavformat    58. 38.101 / 58. 38.101
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info]   libavdevice    58.  9.103 / 58.  9.103
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info]   libavfilter     7. 76.100 /  7. 76.100
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info]   libavresample   4.  0.  0 /  4.  0.  0
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info]   libswscale      5.  6.100 /  5.  6.100
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info]   libswresample   3.  6.100 /  3.  6.100
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [info]   libpostproc    55.  6.100 / 55.  6.100
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [tcp @ 00000218bb6cdbc0] [verbose] Starting connection attempt to 192.168.1.4 port 554
[25/03/2021, 3:09:11 pm] [Camera FFmpeg] [Front] [tcp @ 00000218bb6cdbc0] [verbose] Successfully connected to 192.168.1.4 port 554
```

**Homebridge Config:**

```json
        {
            "name": "Camera FFmpeg",
            "porthttp": 5005,
            "cameras": [
                {
                    "name": "Backyard",
                    "unbridge": true,
                    "videoConfig": {
                        "source": "-i rtsp://XXX@192.168.1.4:554/cam/realmonitor?channel=2&subtype=0",
                        "audio": true,
                        "debug": true
                    }
                },
                {
                    "name": "Front",
                    "unbridge": true,
                    "videoConfig": {
                        "source": "-i rtsp://XXX@192.168.1.4:554/cam/realmonitor?channel=7&subtype=0",
                        "audio": true,
                        "debug": true
                    }
                },
                {
                    "name": "Intercom",
                    "doorbell": true,
                    "unbridge": true,
                    "videoConfig": {
                        "source": "-i rtsp://192.168.1.3/h264_stream",
                        "stillImageSource": "-i http://192.168.1.3/api/camera/snapshot?width=1280&height=960",
                        "vcodec": "copy",
                        "audio": true,
                        "debug": true
                    }
                },
                // removed other entries for brevity
            ],
            "platform": "Camera-ffmpeg"
        },
```

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

**Environment:**

* **Node.js Version**: v14.14.0
* **NPM Version**: 6.14.10
* **Homebridge Version**: 1.3.3
* **Homebridge Camera FFmpeg Version**: 3.1.2
* **Homebridge Config UI X Plugin Version**: 4.40.0
* **Operating System**: Windows 10


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