scripts/ffmpeg/compress-camera-public.sh

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#!/usr/bin/env sh
verify_commands() {
commands=("ffmpeg" "ffprobe")
for command in "${commands[@]}"; do
which $command &> /dev/null
if [ $? -ne 0 ]; then
echo "command '$command' not found"
exit 1
fi
done
}
main() {
verify_commands
for arg in "$@"; do
for file in $(ls "$arg"); do
filename="${file%.*}"
extension="${file##*.}"
if [ "$extension" != "mp4" ]; then
echo "Invalid filetype: $file (expected mp4)"
continue
fi
width=$(ffprobe -v error -select_streams v:0 -show_entries stream=width -of default=noprint_wrappers=1:nokey=1 "$file")
height=$(ffprobe -v error -select_streams v:0 -show_entries stream=height -of default=noprint_wrappers=1:nokey=1 "$file")
rotation=$(ffprobe -v error -select_streams v:0 -show_entries stream_side_data=rotation -of default=noprint_wrappers=1:nokey=1 "$file")
if [ "$rotation" -eq "90" ] || [ "$rotation" -eq "-90" ]; then
new_width=$height
new_height=$width
width=$new_width
height=$new_height
fi
if [ "$width" -gt "$height" ]; then
width=1920
height=-1
else
width=-1
height=1920
fi
ffmpeg -i "$file" -vf scale="$width:$height" -b:v 1800k -minrate 900k -maxrate 2610k -tile-columns 2 -g 240 -threads 8 -quality good -crf 31 -c:v libvpx-vp9 -c:a copy -pass 1 -passlogfile /tmp/ffmpeg2pass -speed 4 -an -f null /dev/null
ffmpeg -i "$file" -vf scale="$width:$height" -b:v 1800k -minrate 900k -maxrate 2610k -tile-columns 3 -g 240 -threads 8 -quality good -crf 32 -c:v libvpx-vp9 -c:a copy -pass 2 -passlogfile /tmp/ffmpeg2pass -speed 4 "${filename}_public.mp4"
done
done
}
main $@