x264-safe

#!/bin/bash

#
#  x264-safe
#  Wrapper script around x264 which renames possibly existing (output) files before x264 automatically
#  overwrites them.
#
#  Usage:
#      Simply use 'x264-safe' instead 'x264'. :-)
#
#
#  Quickly hacked together by Wilhelm/ JPTV.club and released in the Public Domain.
#

PARAMETERS=( "$@" )

echo "[x264-safe] Executing safety checks…"

while [[ $# -gt 0 ]]; do
	case $1 in
		-o|--output)
			OUTPUT="$2"

			if [ -z "${OUTPUT}" ]; then
				echo "[x264-safe] No argument for parameter -o/--output."
				exit 1
			else
				echo "[x264-safe] Checking if output file exists…"
				if [ -s "${OUTPUT}" ]; then
					echo -e "[x264-safe] \033[00;31mFile <${OUTPUT}> exists and is not empty. Renaming it to avoid x264 killing it.\033[0m"

					DATE="$(date +'%Y%m%d%H%M%S')"
					if [[ "${OUTPUT}" =~ \.(264|mkv|flv|mp4)$ ]]; then
						echo "[x264-safe] One of the 4 supported file extensions/ formats detected."
						NEWFILENAME="$(sed 's/\.\([^.]*\)$/,'"${DATE}"'.\1/' <<< "${OUTPUT}")"
					else
						echo -e "[x264-safe] \033[00;31mUnsupported file extension/ format detected.\033[0m"
						NEWFILENAME="${OUTPUT},${DATE}.bak"
					fi

					echo "[x264-safe] Using <${NEWFILENAME}> as new filename for the backup."
					mv "${OUTPUT}" "${NEWFILENAME}"
				fi
			fi

			shift
			shift
			;;
		*)
			shift
			;;
	esac
done

echo "[x264-safe] Calling x264…"
echo "[x264-safe] Using arguments: ${PARAMETERS[@]}"

exec /usr/local/bin/x264 "${PARAMETERS[@]}"