Nice script to convert your mkvs to mp4s using ffmpeg

convert-to-mp4.sh

#!/bin/sh
LOG="$HOME/convert-to-mp4.log"
for arg; do
  if [ -d "$arg" ]; then
    echo "$arg is a directory\n"
    find ${arg%/} -type f -name "*.mkv" -print0 | while IFS= read -r -d '' file; do
      DIR=$(dirname "${file}")
      BASE=$(basename "${file}" ".mkv")
      cd "${DIR}"
      MKV=$(find . -maxdepth 1 -name "${BASE}.mkv" -print0)
      MP4=$(find . -maxdepth 1 -name "${BASE}.mp4" -print0)
      if [ -f "$MKV" ] && [ ! -f "$MP4" ]; then
        printf "Converting ${file}\n" >> $LOG
        ffmpeg -i "${BASE}.mkv" -c copy "${BASE}.mp4"
        MKV=$(find . -maxdepth 1 -name "${BASE}.mkv" -print0)
        MP4=$(find . -maxdepth 1 -name "${BASE}.mp4" -print0)
        if [ -f "$MKV" ] && [ ! -f "$MP4" ]; then
          printf "Converter FAILED\n" >> $LOG
        else
          printf "Converter SUCCESSFUL\n" >> $LOG
        fi
      else
        printf "Already converted ${file}\n" >> $LOG
      fi
    done
  else
    printf "${arg%/} is not a directory\n" >> $LOG
  fi
done