strip_track_except: add a new script

strip_track_except.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -euo pipefail
+colorprint() {
+  echo -e "\e[31m${1}\e[0m"
+}
+SCRIPT_NAME=$(basename "$0")
+test -z "${1}" && echo "File not specified or doesn't exist, aborting. Usage: $SCRIPT_NAME \$FILENAME \$LANGUAGE_TO_KEEP" && exit 1
+FILENAME=$1
+# default language to keep is second parameter, or japanese if unspecified
+LANGUAGE_TO_KEEP="${2:-jpn}"
+echo -n "Processing "
+colorprint "$FILENAME"
+FILENAME_WITHOUT_EXT=${FILENAME%.*}
+ffmpeg -i "$FILENAME" -map 0:v -map 0:a:m:language:${LANGUAGE_TO_KEEP} -map 0:s -c copy "${FILENAME_WITHOUT_EXT}.converted.mkv"