mass mkvmerge script

merge.sh

#!/bin/bash

SOUND_DIR="./sound"
VIDEO_DIR="./video"
SEASON="01"
REMOVE_SOURCE_FILES="false"
AUDIO_OFFSET="0"

if [ $# -lt 2 ]; then
   echo "Specify episodes range like ./merge.sh from-episode to-episode [audio-offset]"
   exit 1
fi

echo "Merge episodes from $1 to $2"

if [ $# -eq 3 ]; then
   echo "Using audio offset of $3 ms"
   AUDIO_OFFSET=$3
fi

for ((i = $1; i <= $2; i++)); do
   EPISODE=$(printf "%03d" $i)
   echo Work with episode $EPISODE

   AUDIO_FILE=$(find "$SOUND_DIR" -type f -name "*$EPISODE*")
   if [ -z "$AUDIO_FILE" ]; then
      echo "No file found in $SOUND_DIR with $EPISODE in the name"
      exit 1
   fi
   echo "Found audio file: $AUDIO_FILE"

   VIDEO_FILE=$(find "$VIDEO_DIR" -type f -name "*$EPISODE*")
   if [ -z "$VIDEO_FILE" ]; then
      echo "No file found in $VIDEO_DIR with $EPISODE in the name"
      exit 1
   fi
   echo "Found video file: $VIDEO_FILE"

   mkvmerge -A -o s${SEASON}e$EPISODE.mkv -y 1:$AUDIO_OFFSET "$VIDEO_FILE" --language 0:rus "$AUDIO_FILE"
   echo Result code $?
   if [ $? -ne 0 ]; then
      echo "Error while merging episode $EPISODE"
      exit 1
   fi

   if [ "$REMOVE_SOURCE_FILES" = "true" ]; then
      echo "Removing source files"
      rm $VIDEO_FILE
      rm $AUDIO_FILE
   fi
done