[docker-wyze-bridge] RTSP feed will grab snapshot but not show video
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**Describe The Problem:**
<!-- A clear and concise description of what the bug is. -->

I have an RTSP feed from [docker-wyze-bridge].  I can view feed in VLC and LiveCams Pro on iPhone.  FFmpeg seems to connect and get info, it can even get a snapshot.  But the video feed does not display. Only issue I clearly see in logs is:

"[warning] attempted to set receive buffer to size 393216 but it only ended up set as 360448

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

You would have to setup a Wyze camera and connect [docker-wyze-bridge] to create a feed.  The feed is currently in SD to try and make sure it was not a size or dimensions problem.

**Logs:**
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```
Show the Homebridge logs here.

8/6/2021, 2:10:15 PM [Camera FFmpeg] [CAM Front] Snapshot requested: 1280 x 720
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] Fetching snapshot took 3.411 seconds.
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] Sending snapshot: 1280 x 720
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] Video stream requested: 1280 x 720, 30 fps, 299 kbps
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] Starting video stream: native x native, native fps, 299 kbps
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [info] ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [info]   built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [info]   configuration: --pkgconfigdir=/build/workspace/lib/pkgconfig --prefix=/build/workspace --pkg-config-flags=--static --extra-cflags=-I/build/workspace/include --extra-ldflags=-L/build/workspace/lib --extra-libs='-lpthread -lm' --enable-static --disable-debug --disable-shared --disable-ffplay --disable-doc --enable-openssl --enable-gpl --enable-version3 --enable-nonfree --enable-pthreads --enable-libvpx --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libx264 --enable-runtime-cpudetect --enable-libfdk-aac --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-decoder=h264 --enable-network --enable-protocol=tcp --enable-libspeex --enable-demuxer=rtsp --enable-omx-rpi --enable-mmal --enable-indev=alsa --enable-outdev=alsa
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [info]   libavutil      56. 51.100 / 56. 51.100
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [info]   libavcodec     58. 91.100 / 58. 91.100
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [info]   libavformat    58. 45.100 / 58. 45.100
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [info]   libavdevice    58. 10.100 / 58. 10.100
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [info]   libavfilter     7. 85.100 /  7. 85.100
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [info]   libswscale      5.  7.100 /  5.  7.100
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [info]   libswresample   3.  7.100 /  3.  7.100
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [info]   libpostproc    55.  7.100 / 55.  7.100
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [tcp @ 0x44e4940] [verbose] Starting connection attempt to 192.168.1.167 port 8554
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [tcp @ 0x44e4940] [verbose] Successfully connected to 192.168.1.167 port 8554
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] [rtsp @ 0x44e2a10] [verbose] SDP:
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] v=0
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] o=- 0 0 IN IP4 127.0.0.1
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] s=Stream
8/6/2021, 2:10:19 PM [Camera FFmpeg] [CAM Front] c=IN IP4 0.0.0.0
8/6/2021, 2:10:20 PM [Camera FFmpeg] [CAM Front] t=0 0
8/6/2021, 2:10:20 PM [Camera FFmpeg] [CAM Front] m=video 0 RTP/AVP 96
8/6/2021, 2:10:20 PM [Camera FFmpeg] [CAM Front] a=rtpmap:96 H264/90000
8/6/2021, 2:10:20 PM [Camera FFmpeg] [CAM Front] a=fmtp:96 packetization-mode=1; sprop-parameter-sets=J00AMudAUBf8s1AQEB8AAAMAAQAAAwAoNGAE4gB1N//wKA==,KO48gAA=; profile-level-id=4D0032
8/6/2021, 2:10:20 PM [Camera FFmpeg] [CAM Front] a=control:trackID=0
8/6/2021, 2:10:20 PM [Camera FFmpeg] [CAM Front] 
8/6/2021, 2:10:20 PM [Camera FFmpeg] [CAM Front] [udp @ 0x44e76b0] [warning] attempted to set receive buffer to size 393216 but it only ended up set as 360448
8/6/2021, 2:10:20 PM [Camera FFmpeg] [CAM Front] [udp @ 0x44f7a10] [warning] attempted to set receive buffer to size 393216 but it only ended up set as 360448
8/6/2021, 2:10:20 PM [Camera FFmpeg] [CAM Front] [rtsp @ 0x44e2a10] [verbose] setting jitter buffer size to 500
8/6/2021, 2:10:20 PM [Camera FFmpeg] [CAM Front] [h264 @ 0x44e6b10] [verbose] Reinit context to 640x368, pix_fmt: yuv420p
8/6/2021, 2:10:22 PM [Camera FFmpeg] [CAM Front] [info] Input #0, rtsp, from 'rtsp://cams.local:8554/cam-front':
8/6/2021, 2:10:22 PM [Camera FFmpeg] [CAM Front] [info]   Metadata:
8/6/2021, 2:10:22 PM [Camera FFmpeg] [CAM Front] [info]     title           : Stream
8/6/2021, 2:10:22 PM [Camera FFmpeg] [CAM Front] [info]   Duration: N/A, start: 0.457422, bitrate: N/A
8/6/2021, 2:10:22 PM [Camera FFmpeg] [CAM Front] [info]     Stream #0:0: Video: h264 (Main), 1 reference frame, yuv420p(tv, bt709, progressive, left), 640x360 (640x368), 20 fps, 20 tbr, 90k tbn, 40 tbc
8/6/2021, 2:10:22 PM [Camera FFmpeg] [CAM Front] [info] Stream mapping:
8/6/2021, 2:10:22 PM [Camera FFmpeg] [CAM Front] [info]   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
8/6/2021, 2:10:22 PM [Camera FFmpeg] [CAM Front] [info] Press [q] to stop, [?] for help
8/6/2021, 2:10:22 PM [Camera FFmpeg] [CAM Front] [h264 @ 0x45b0470] [verbose] Reinit context to 640x368, pix_fmt: yuv420p
8/6/2021, 2:10:23 PM [Camera FFmpeg] [CAM Front] [info] frame=    0 fps=0.0 q=0.0 size=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
8/6/2021, 2:10:23 PM [Camera FFmpeg] [CAM Front] [graph 0 input from stream 0:0 @ 0x4590e60] [verbose] w:640 h:360 pixfmt:yuv420p tb:1/90000 fr:20/1 sar:0/1
8/6/2021, 2:10:23 PM [Camera FFmpeg] [CAM Front] FFmpeg exited with code: null and signal: SIGILL (Unexpected)
8/6/2021, 2:10:49 PM [Camera FFmpeg] [CAM Front] Stopped video stream.

Remove any sensitive information.
```

**Homebridge Config:**

```json
Show your homebridge config.json here.

        "name": "CAM Front",
        "videoConfig": {
            "source": "-i rtsp://cams.local:8554/cam-front",
            "maxStreams": 2,
            "maxWidth": 0,
            "maxHeight": 0,
            "maxFPS": 0,
            "audio": false,
            "debug": true

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**: <!-- 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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