tracktitleeditor

#!/usr/bin/env bash

# Check for tool dependencies
SELF_FULLPATH=`realpath $0`
SELF_DIR=`dirname $SELF_FULLPATH`
# Override default tool list
TOOLS=(mkvpropedit mkvmerge)
# Does not depend on any other scripts
SCRIPTS=NONE
if [ ! -r $SELF_DIR/toolchecker ]; then
    echo "toolchecker not found."
    exit 1
else
    . $SELF_DIR/toolchecker
fi
if [ -z "$1" ]; then
  echo "No file supplied"
  exit
fi

truncate() {
    echo "$@" | awk -v len=60 '{ if (length($0) > len) print substr($0, 1, len-3) "..."; else print; }'
}

echo
FILE="$1"
while true; do
    video=0
    audio=0
    subtitle=0

    JSON=`$MKVMERGE -F json --identify "$FILE"`
    while read -r line; do
        #echo "$line" | jq -c '.properties.track_name'
        ID=`echo "$line" | jq -c '.id'`
        TYPE=`echo "$line" | jq -c '.type' | sed 's/\"//g'`
        CODEC=`echo "$line" | jq -c '.codec' | sed 's/\"//g'`
        NAME=`echo "$line" | jq -c '.properties.track_name' | sed 's/\"//g'`
        case $TYPE in
            video) ((video=video+1));;
            audio) ((audio=audio+1));;
            subtitles) ((subtitles=subtitles+1));;
        esac
        SELECTOR="${TYPE:0:1}${!TYPE}"
        track_array+=("${ID};${SELECTOR};${TYPE};${CODEC};$(truncate $NAME)")
        #echo "${ID}; ${track_array[$ID]}"
        #echo "${ID}; ${SELECTOR}; ${TYPE}; ${CODEC}; $(truncate $NAME)"
    #done < <(echo "$JSON" | jq -c '.tracks[]') | column -t -s ';'
    done < <(echo "$JSON" | jq -c '.tracks[]')

    printf '%s\n' "${track_array[@]}" | column -t -s ';'
    echo
    echo -n "Track ID (q to quit): "
    read -r TRACK_TO_EDIT
    if [ "$TRACK_TO_EDIT" == "q" ]; then
        exit 0;
    fi
    IFS=\; read ID SELECTOR TYPE CODEC NAME <<<"$(echo ${track_array[$TRACK_TO_EDIT]})"
    echo -n "New track name (blank to remove): "
    read -r TRACK_NAME
    echo "$MKVPROPEDIT \"$FILE\" --edit track:${SELECTOR} --set \"name=$TRACK_NAME\""
    $MKVPROPEDIT "$FILE" --edit track:${SELECTOR} --set "name=$TRACK_NAME"
    unset track_array
    unset video
    unset audio
    unset subtitles
done