A small script to backup a DVD

dvd-backup.sh

#!/bin/bash

set -Eeuo pipefail

WORKDIR=$(mktemp -d)
TMDB_API_KEY="your-key-here"
VIDEOS="$HOME/Videos"

trap "An error occured, temporary files have been kept in $WORKDIR" ERR

pushd "$WORKDIR" > /dev/null

TITLE="${1:-$(lsdvd | grep '^Disc Title:' | cut -d: -f2 | tr -d '[:space:]')}"
TRACK="$(lsdvd | grep '^Longest' | cut -d: -f2 | tr -d '[:space:]')"
SOURCE="dvd://$TRACK"

if [ ! -f stream.dump ]; then
  echo -e "\e[32;1mCaching files\e[0m"
  mplayer $SOURCE -quiet -dumpstream | grep '^dump: '
fi

if [ ! -f chapters.txt ]; then
  echo -e "\e[32;1mExtract chapters\e[0m"
  dvdxchap -t $TRACK /dev/dvd > chapters.txt
fi

if [ ! -f video.avi ]; then
  echo -e "\e[32;1mCrop and scale detection\e[0m"
  crop=$(mplayer $SOURCE -quiet -vf cropdetect -nosound -vo null -frames 10 \
  -sstep 211 -nocache 2> /dev/null | awk -F '[()]' '/\-vf/ {print $2}' | \
  tail -n1 | cut -d' ' -f2)
  width=$(echo $crop | cut -d= -f2 | cut -d: -f1)
  width=`awk "BEGIN {printf \"%.0f\", $width*(1024/720)}"`
  height=$(echo $crop | cut -d= -f2 | cut -d: -f2)

  for vpass in 1 2; do
    if [ $vpass -eq 1 ]; then
      [ -f divx2pass.log ] && continue
      file=/dev/null
    else
      file=video.avi
    fi
    echo -e "\e[32;1mPass $vpass\e[0m"
    mencoder stream.dump -nosound -nosub \
      -ovc lavc \
      -lavcopts vcodec=mpeg4:vhq:v4mv:vqmin=2:vbitrate=1500:vpass=$vpass \
      -vf pp=de,$crop,scale=$width:$height \
      -o "$file" 2> pass_$vpass.log
  done
fi

for lang in en fr; do
  [ -f $lang.avi ] && continue
  echo -e "\e[32;1mLang $lang\e[0m"
  mencoder stream.dump \
    -ovc frameno \
    -slang $lang -vobsubout $lang \
    -alang $lang -oac copy \
    -o $lang.avi 2> /dev/null
done

# This product uses the TMDb API but is not endorsed or certified by TMDb.
set -x
if [ ! -f cover.jpg ]; then
  echo -e "\e[32;1mFetch data from TMDb\e[0m"
  base_url=$(curl -q -G \
    --data-urlencode "api_key=$TMDB_API_KEY" \
    https://api.themoviedb.org/3/configuration | jq -r '.images.secure_base_url')
  poster_size="original"
  data=$(curl -q -G \
    --data-urlencode "language=fr_FR" \
    --data-urlencode "query=$TITLE" \
    --data-urlencode "api_key=$TMDB_API_KEY" \
    https://api.themoviedb.org/3/search/movie | jq '.results[0]')
  poster_path=$(echo $data | jq -r '.poster_path')
  #movie_description=$(echo $data | jq -r '.overview')
  curl -L --output cover.jpg ${base_url}${poster_size}${poster_path} || {
    echo -e "\e[31;1Failed... \e[32mSo we generate the thumbnail\e[0m"
    ffmpeg -i video.avi \
      -ss 100 \
      -vf "thumbnail,scale=640:360" \
      -frames:v 1 cover.jpg > /dev/null
  }
fi

set +e

echo -e "\e[32;1mMerge\e[0m"
mkvmerge --title "$TITLE" \
  --language 1:eng -D en.avi \
  --language 1:fre -D fr.avi \
  --language 0:eng en.idx \
  --language 0:fre fr.idx \
  --default-language fre \
  -A video.avi \
  --attachment-name "cover" --attachment-mime-type "image/jpeg" \
  --attach-file cover.jpg \
  --chapters chapters.txt \
  -o "$TITLE.mkv"

if [ $? -eq 2 ]; then
  echo -e "\e[33;1mThe merge failed\e[0m"
  exit 1
fi

echo -e "\e[32;1mFinishing\e[0m"
mv -v "$TITLE.mkv" $VIDEOS/
rm -vf *

popd > /dev/null
rmdir "$WORKDIR"