FFmpeg Script File:

#!/bin/sh

ffmpeg \
-init_hw_device vaapi=decdev:/dev/intel_gpu \
-init_hw_device vaapi=encdev:/dev/dri/renderD129 \
-hwaccel vaapi \
-hwaccel_device decdev \
-hwaccel_output_format vaapi \
-f v4l2 -input_format mjpeg -framerate 30 -video_size 1920x1080 \
-i /dev/video0 \
-filter_hw_device encdev \
-filter_complex \
"[0:v]hwdownload, settb=AVTB, setpts='trunc(PTS/1K)*1K+st(1,trunc(RTCTIME/1K))-1K*trunc(ld(1)/1K)',
drawtext=fontfile=/usr/share/fonts/TTF/Verdana.TTF:text='(%{localtime\:%A, %B-%-d-%Y}\) \ \
[%{localtime\:%-I}\:%{localtime\:%M}\:%{localtime\:%S}\:%{eif\:1M*t-1K*trunc(t*1K)\:d} \ %{localtime\:%p}\]':x=0:y=0:borderw=3:bordercolor=#000000:fontsize=50:fontcolor=orange:box=1:boxcolor=black@0.3, split=2[v_1][v_2];\
[v_1]format=nv12, hwupload[out_1];\
[v_2]select='gt(scene,0.04)'[out_2]" \
-map '[out_1]' -c:v hevc_vaapi -b:v 2M -rc_mode 2 -level 4.1 -f segment -segment_time 600 -reset_timestamps 1 -strftime 1 /home/user/Living_Room/"(%b-%-d-%Y-%a)_%-I::%M::%S::%p.mp4" \
-map '[out_2]' -f image2 -r 1/6 -strftime 1 /home/user/Living_Room_Snap/"(%b-%-d-%Y-%a)_%-I::%M::%S::%p.jpg"



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Service File located at: /etc/systemd/system/shell_script_dvr.service

[Unit]
Description=DVR FFMPEG COMMANDs

[Service]
ExecStart=/home/user/shell_script_dvr.sh

[Install]
WantedBy=multi-user.target