Raspberry Pi Camera Module H264 live stream issue after release 2.5.0
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**Describe The Problem:**
Tested configuration no longer works after release 2.5.0. Homekit shows a "Live" feed but the image is static.

**To Reproduce:**
Configure a raspberry Pi camera module with the configuration below.

**Logs:**

```
[8/25/2020, 18:35:52] [Camera FFmpeg] [Pi 3B Camera] Snapshot requested: 480 x 270
[8/25/2020, 18:35:52] [Camera FFmpeg] [Pi 3B Camera] Sending snapshot: 480 x 270
[8/25/2020, 18:35:52] [Camera FFmpeg] [Pi 3B Camera] Snapshot command: /usr/lib/node_modules/homebridge-camera-ffmpeg/node_modules/ffmpeg-for-homebridge/ffmpeg -video_size 1920x1080 -f video4linux2 -i /dev/video0 -ss 1.5 -frames:v 1 -filter:v scale='min(480,iw)':'min(270,ih)':force_original_aspect_ratio=decrease,scale=trunc(iw/2)*2:trunc(ih/2)*2 -f image2 -
[8/25/2020, 18:35:54] [RPi] localhost: set Current Temperature from 47.2°C to 47.8°C
[8/25/2020, 18:35:54] [RPi] localhost: set Frequency from 1400MHz to 600MHz
[8/25/2020, 18:35:54] [RPi] localhost: set Voltage from 1.3688V to 1.2V
[8/25/2020, 18:35:54] [RPi] localhost: set Load from 0.24 to 0.19
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] Video stream requested: 1280 x 720, 30 fps, 299 kbps
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] Starting video stream: 1280 x 720, 30 fps, 299 kbps
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] Stream command: /usr/lib/node_modules/homebridge-camera-ffmpeg/node_modules/ffmpeg-for-homebridge/ffmpeg -re -r 30 -video_size 1920x1080 -f video4linux2 -input_format h264 -i /dev/video0 -crf 18 -threads 3 -an -sn -dn -codec:v h264 -pix_fmt yuv420p -color_range mpeg -r 30 -f rawvideo -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 7719322 -f rtp -srtp_out_suite AES_CM_128_HMAC_SHA1_80 -srtp_out_params GoMUMEAvBL+8rm2C8bGp8/0ix8y2b5LhfeRq8TPT srtp://10.0.1.47:62640?rtcpport=62640&pkt_size=1316 -loglevel level+verbose
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [info] ffmpeg version 4.2.2-d1e8be3 Copyright (c) 2000-2019 the FFmpeg developers
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [info]   built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [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
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [info]   libavutil      56. 31.100 / 56. 31.100
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [info]   libavcodec     58. 54.100 / 58. 54.100
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [info]   libavformat    58. 29.100 / 58. 29.100
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [info]   libavdevice    58.  8.100 / 58.  8.100
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [info]   libavfilter     7. 57.100 /  7. 57.100
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [info]   libswscale      5.  5.100 /  5.  5.100
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [info]   libswresample   3.  5.100 /  3.  5.100
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [info]   libpostproc    55.  5.100 / 55.  5.100
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] [video4linux2,v4l2 @ 0x42136d0] [verbose] fd:3 capabilities:85200005
[8/25/2020, 18:36:00] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [h264 @ 0x4214690] [verbose] Reinit context to 1920x1088, pix_fmt: yuv420p
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info] Input #0, video4linux2,v4l2, from '/dev/video0':
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info]   Duration: N/A, start: 3506.331207, bitrate: N/A
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info]     Stream #0:0: Video: h264 (High), 1 reference frame, yuv420p(progressive, left), 1920x1080 (1920x1088), 30 fps, 30 tbr, 1000k tbn, 2000k tbc
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [verbose] Matched encoder 'libx264' for codec 'h264'.
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info] Stream mapping:
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info]   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info] Press [q] to stop, [?] for help
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [h264 @ 0x422f7f0] [verbose] Reinit context to 1920x1088, pix_fmt: yuv420p
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [Parsed_scale_0 @ 0x42c9d30] [verbose] w:min(1280,iw) h:min(720,ih) flags:'bicubic' interl:0
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [Parsed_scale_1 @ 0x4233f40] [verbose] w:trunc(iw/2)*2 h:trunc(ih/2)*2 flags:'bicubic' interl:0
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [graph 0 input from stream 0:0 @ 0x42448f0] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [verbose] w:1920 h:1080 pixfmt:yuv420p tb:1/30 fr:30/1 sar:0/1 sws_param:flags=2
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [Parsed_scale_0 @ 0x42c9d30] [verbose] w:1920 h:1080 fmt:yuv420p sar:0/1 -> w:1280 h:720 fmt:yuv420p sar:0/1 flags:0x4
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [Parsed_scale_1 @ 0x4233f40] [verbose] w:1280 h:720 fmt:yuv420p sar:0/1 -> w:1280 h:720 fmt:yuv420p sar:0/1 flags:0x4
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [libx264 @ 0x422a820] [info] using cpu capabilities: ARMv6 NEON
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [libx264 @ 0x422a820] [info] profile High, level 3.1, 4:2:0, 8-bit
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info] Output #0, rtp, to 'srtp://10.0.1.47:62640?rtcpport=62640&pkt_size=1316':
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info]   Metadata:
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info]     encoder         : Lavf58.29.100
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info]     Stream #0:0: Video: h264 (libx264), 1 reference frame, yuv420p(tv, left), 1280x720, q=-1--1, 299 kb/s, 30 fps, 90k tbn, 30 tbc
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info]     Metadata:
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info]       encoder         : Lavc58.54.100 libx264
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info]     Side data:
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info]       cpb: bitrate max/min/avg: 0/0/299000 buffer size: 0 vbv_delay: -1
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] [info] 
[8/25/2020, 18:36:01] [Camera FFmpeg] [Pi 3B Camera] frame=    6 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
[8/25/2020, 18:36:02] [Camera FFmpeg] [Pi 3B Camera] [info] frame=   14 fps= 13 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
[8/25/2020, 18:36:03] [Camera FFmpeg] [Pi 3B Camera] [info] 
[8/25/2020, 18:36:03] [Camera FFmpeg] [Pi 3B Camera] frame=   22 fps= 14 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
[8/25/2020, 18:36:03] [Camera FFmpeg] [Pi 3B Camera] [info] frame=   30 fps= 14 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
[8/25/2020, 18:36:04] [Camera FFmpeg] [Pi 3B Camera] [info] frame=   38 fps= 14 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
[8/25/2020, 18:36:06] [Camera FFmpeg] [Pi 3B Camera] [info] frame=   46 fps= 14 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
[8/25/2020, 18:36:06] [Camera FFmpeg] [Pi 3B Camera] [info] 
[8/25/2020, 18:36:06] [Camera FFmpeg] [Pi 3B Camera] frame=   47 fps=9.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
[8/25/2020, 18:36:07] [Camera FFmpeg] [Pi 3B Camera] [info] frame=   51 fps=9.5 q=24.0 size=      94kB time=00:00:00.03 bitrate=23196.3kbits/s speed=0.00623x    
[8/25/2020, 18:36:07] [Camera FFmpeg] [Pi 3B Camera] [info] frame=   53 fps=8.9 q=24.0 size=     163kB time=00:00:00.10 bitrate=13331.8kbits/s speed=0.0168x    
[8/25/2020, 18:36:07] [Camera FFmpeg] [Pi 3B Camera] [info] frame=   55 fps=8.5 q=24.0 size=     172kB time=00:00:00.16 bitrate=8440.7kbits/s speed=0.0257x    
[8/25/2020, 18:36:08] [Camera FFmpeg] [Pi 3B Camera] [info] frame=   58 fps=7.9 q=24.0 size=     213kB time=00:00:00.26 bitrate=6558.2kbits/s speed=0.0363x    
[8/25/2020, 18:36:09] [RPi] localhost: set Current Temperature from 47.8°C to 55.8°C
[8/25/2020, 18:36:09] [RPi] localhost: set Frequency from 600MHz to 1400MHz
[8/25/2020, 18:36:09] [RPi] localhost: set Voltage from 1.2V to 1.3688V
[8/25/2020, 18:36:09] [RPi] localhost: set Load from 0.19 to 0.61
[8/25/2020, 18:36:09] [Camera FFmpeg] [Pi 3B Camera] [info] frame=   62 fps=7.4 q=24.0 size=     252kB time=00:00:00.40 bitrate=5158.6kbits/s speed=0.048x    
[8/25/2020, 18:36:10] [Camera FFmpeg] [Pi 3B Camera] Received request to reconfigure: 640 x 360, 30 fps, 132 kbps (Ignored)
[8/25/2020, 18:36:10] [Camera FFmpeg] [Pi 3B Camera] [info] frame=   66 fps=7.1 q=24.0 size=     288kB time=00:00:00.53 bitrate=4423.5kbits/s speed=0.0572x    
[8/25/2020, 18:36:11] [Camera FFmpeg] [Pi 3B Camera] Stopped video stream.
[8/25/2020, 18:36:11] [Camera FFmpeg] [Pi 3B Camera] FFmpeg exited with code: null and signal: SIGKILL (Expected)
[8/25/2020, 18:36:21] [Camera FFmpeg] [Pi 3B Camera] Snapshot requested: 480 x 270
[8/25/2020, 18:36:21] [Camera FFmpeg] [Pi 3B Camera] Sending snapshot: 480 x 270
[8/25/2020, 18:36:21] [Camera FFmpeg] [Pi 3B Camera] Snapshot command: /usr/lib/node_modules/homebridge-camera-ffmpeg/node_modules/ffmpeg-for-homebridge/ffmpeg -video_size 1920x1080 -f video4linux2 -i /dev/video0 -ss 1.5 -frames:v 1 -filter:v scale='min(480,iw)':'min(270,ih)':force_original_aspect_ratio=decrease,scale=trunc(iw/2)*2:trunc(ih/2)*2 -f image2 -
```

**Homebridge Config:**

```json
{
            "name": "Camera FFmpeg",
            "cameras": [
                {
                    "name": "Pi 3B Camera",
                    "motion": true,
                    "switches": true,
                    "videoConfig": {
                        "source": "-re -r 30 -video_size 1920x1080 -f video4linux2 -input_format h264 -i /dev/video0 -crf 18 -threads 3",
                        "stillImageSource": "-video_size 1920x1080 -f video4linux2 -i /dev/video0 -ss 1.5",
                        "maxStreams": 2,
                        "maxFPS": 30,
                        "vcodec": "h264",
                        "audio": false,
                        "vflip": false,
                        "hflip": false,
                        "debug": true
                    }
                }
            ],
            "platform": "Camera-ffmpeg"
        }
```

**Screenshots:**
N/A

**Environment:**

* **Node.js Version**: v12.18.3
* **NPM Version**: v6.14.6
* **Homebridge Version**: 1.1.2
* **Homebridge Camera FFmpeg Version**: v3.0.1
* **Homebridge Config UI X Plugin Version**:  v4.27.0
* **Operating System**: Raspbian

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