An MLT proxifier for shotcut

mlt_proxify.sh

#!/usr/bin/env bash

INPUT="$1"

if [[ -z "$INPUT" ]]; then
	echo 'Usage: proxify [filename.mlt]'
	echo '(The current folder sould include a "raw" folder containing your raw footages in mp4 format)'
	echo 'xpath is required for this tool to work'
	exit
fi

mkdir -p proxy
mkdir -p backups

filename=$(basename -- "$INPUT")
extension="${filename##*.}"
filename="${filename%.*}"
timestamp=$(date +%s)
cp -v "$INPUT" "backups/${filename}_${timestamp}.${extension}"

sed -i '' -re 's/proxy/raw/g' "$INPUT"

xpath -q -e '//property[@name="resource"]/text()' "$INPUT" > /tmp/files_to_proxify
while read -r i; do
	if echo "$i" | grep -vq "^raw/"; then
		echo "input isn't a raw file, skipping (filename: $i)"
		continue
	fi

	if [[ -f "$i" ]]; then
		filename=$(basename -- "$i")
		extension="${filename##*.}"
		filename="${filename%.*}"
		dest="proxy/${filename}.${extension}"
		echo "$i -> $dest"

		ffmpeg -i "$i" -n -nostdin -strict -2 -vf scale=iw/6:ih/6 "$dest"
	else
		echo "Warning: file not found (filename: $i)"
	fi
done < /tmp/files_to_proxify

sed -i '' -re 's/raw/proxy/g' "$INPUT"