Build MKV video with subtitles inside

build-mkv-with-subtitles

#!/bin/bash
# Build MKV file with subtitles inside
# Author: Kenzo Okamura

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License at <http://www.gnu.org/licenses/> for
# more details.

ME=$(readlink -f "$0")
SCRIPT_NAME=$(basename "$ME")
MKVMERGE=$(which mkvmerge)

if [ $# -ne 2 ];
then
  echo "Builds an MKV with a subtitle file inside."
  echo "Subtitle file needs to have the same base name as video file."
  echo "(e.g. video.mp4 and video.srt)"
  echo ""
  echo "Usage:"
  echo "  $SCRIPT_NAME <video file> <output directory>"
  exit 1
fi

input="$1"
output_dir="$2"

if [ ! -e "$input" ];
then
  echo "Video file $input not found"
  exit 2
fi

if [ ! -d "$output_dir" ];
then
  echo "Output directory $output_dir not found or is not a directory"
  exit 3
fi

base_name="$(echo $input | sed 's/\....$//')"

extensions="srt sub"
for ext in $extensions ; do
    srt=$base_name.$ext;
    if [[ -e $srt ]]; then break; fi
done

if [ ! -e "$srt" ];
then
  echo "Subtitle for video not found"
  exit 4
fi

if [ ! -x "$MKVMERGE" ];
then
  echo "You need mkvmerge to continue!"
  echo "(for Debian users: apt-get install mkvtoolnix)"
fi

echo "Base name:  $base_name"
echo "Input:      $input"
echo "Subtitles:  $srt"
echo "Output Dir: $output_dir"

"$MKVMERGE" -o "$output_dir/$base_name.mkv"  \
 --no-global-tags \
 --no-chapters "(" "$input" ")" \
 --forced-track 0:no \
 --no-global-tags \
 --no-chapters "(" "$srt" ")"