Batch rename files

remove_prefix.sh

#!/bin/bash

prefix="*-"

shopt -s nullglob

rename(){
	local files=( $prefix* )
	for i in ${!files[*]}
        do
		local file=${files[i]}
		mv "$file" "${file#$prefix}"
		echo "$file → ${file#$prefix}"
	done
}

rename

rename_index.sh

#!/bin/bash

ext=jpg

shopt -s nullglob
OLDIFS=$IFS

rename(){
	IFS=$'\n'
	local arr=( $(ls -v *.$ext) )
	IFS=$OLDIFS

	for i in ${!arr[*]}
	do
		local filename=$(printf "%03d" $(($i+1)))
		mv "${arr[i]}" "${filename}.${ext}"
		echo "${arr[i]} → ${filename}.${ext}"
	done
}

rename

rename_subtitle.sh

#!/bin/bash

vid_ext=mkv
sub_ext=ass
after_sub_ext=sc.ass

shopt -s nullglob

rename(){
	local vid_arr=( *.$vid_ext )
	local sub_arr=( *.$sub_ext )
	for i in ${!vid_arr[*]}
	do
		local filename=${vid_arr[i]%.*}
		mv "${sub_arr[i]}" "${filename}.${after_sub_ext}"
		echo "${sub_arr[i]} → ${filename}.${after_sub_ext}"
	done
}

rename