Tag anime as japanese

languify.sh

#!/bin/bash
# Tag videos as a given language
# Examples:
#   Tag a single MP4 video as Japanese:
#     ./languify.sh jpn Attack on Titan Episode 1.mp4
#   Tag all MP4 files in the directory as English:
#     ./languify.sh eng % mp4

function erroranddie {
    echo "Invalid command! Syntax: ./languify.sh <lang> <file> OR ./languify.sh <lang> % <ext>"
}

function languify {
    if [ -z "$1" ] || [ -z "$2" ] ; then
        erroranddie
    fi
    langcode="$1"
    infiles="${@:2}"

    mkdir out plexignore

    # add language tag to all files
    ffmpeg -i "$infiles" -metadata:s:a:0 language=$langcode -codec copy -map 0 "out/$infiles"

    # get old files outta here
    mv "$infiles" "plexignore/$infiles"

    # move new files to this directory
    cd out
    mv "$infiles" "../$infiles"

    # burn the evidence
    cd ..
    rm -rf out
    rm -rf plexignore
}

if [ -z "$1" ] || [ -z "$2" ] ; then
    erroranddie
fi

if [ "$2" == "%" ] ; then
    if [ -z "$3" ] ; then
        erroranddie
    fi
    infiles="*."$3
    for f in $infiles; do
        languify $1 $f
    done
else
    filename="${@:2}"
    languify $1 $filename
fi