Trim HD dashcam

The following can be used to crop the details off the bottom of a HD Blackvue dashcam and resize it back to HD (1920×1080)

ffmpeg -nostdin -loglevel verbose -i $1 \
-c:a aac \
-vbr 5 \
-c:v libx264 \
-crf 20 \
-coder 1 \
-context 1 \
-g 1 \
-threads 8 \
-vf 'crop=1863:1048:29:0,scale=1920:1080' \
-r 30000/1001 \
$2