Post processing custom script for *arr services

transcodarr.sh

#!/usr/bin/env bash
set -e

[[ "$radarr_eventtype" == "Test" || "$sonarr_eventtype" == "Test" ]] && exit 0

# Determine if the script is being run by Radarr or Sonarr
if [[ -n "$radarr_moviefile_path" ]]; then
  # Running in Radarr
  input_file="$radarr_moviefile_path"
  output_file="${input_file%.*}.mp4"
  movie_id="$radarr_movie_id"
  api_key="<RADARR_API_KEY>"
  host="http://localhost:7878"
elif [[ -n "$sonarr_episodefile_path" ]]; then
  # Running in Sonarr
  input_file="$sonarr_episodefile_path"
  output_file="${input_file%.*}.mp4"
  series_id="$sonarr_series_id"
  episode_id="$sonarr_episode_id"
  api_key="<SONARR_API_KEY>"
  host="http://localhost:8989"
else
  # Unknown environment
  echo "Unknown environment: not running in Radarr or Sonarr"
  exit 1
fi

input_dir="$(dirname "$input_file")"

if [ -z "$SCRIPT" ]
then
  log_dir="$HOME/.logs"
  mkdir -p "$log_dir"
  log_file="$(basename "$input_file")"
  /usr/bin/script "$log_dir/$log_file.log" /bin/bash -c "$0 $*"
  exit 0
fi

# Define the temporary output file path
temp_output_file="${input_file%.*}.temp.mp4"

# Define the audio transcoding settings
audio_codec="-c:a aac -b:a 320k -ac 2"
audio_filter="-af dynaudnorm=f=75:g=11:s=12"

# Log the start time and input file information
echo "Transcoding started at $(date)"
echo "Input file: $input_file"
echo "Output file: $output_file"
echo "Temporary output file: $temp_output_file"

# Copy the video stream and transcode the audio to the specified settings
/usr/local/bin/ffmpeg -i "$input_file" -map 0:v:0 -map 0:a -c:v copy $audio_codec $audio_filter -sn "$temp_output_file"

# Move the temporary output file to the final output file path
mv "$temp_output_file" "$output_file"

# Log the end time and output file information
echo "Transcoding finished at $(date)"
echo "Output file size: $(du -h "$output_file" | awk '{print $1}')"
echo "Output file duration: $(/usr/local/bin/ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$output_file") seconds"

if [[ "$input_file" != "$output_file" ]]; then
  # Deletes the input file if is different than output file
  rm "$input_file"
fi

# Move subtitles if there temporarily
tmp_subtitle_dir="$(mktemp -d)"
if ls "$input_dir"/*.srt &> /dev/null; then
  mv "$input_dir"/*.srt "$tmp_subtitle_dir"
fi

# Notify Radarr or Sonarr of the transcoded file
if [[ -n "$movie_id" ]]; then
  # Notify Radarr
  for i in {1..2}; do # Because of a bug it needs to be called twice
    curl -X POST \
      -H "accept: */*" \
      -H "Content-Type: application/json" \
      -H "X-Api-Key: $api_key" \
      -d "{\"name\": \"RescanMovie\", \"movieId\": $movie_id}" \
      "$host/api/v3/command"
  done
elif [[ -n "$series_id" ]]; then
  # Notify Sonarr
  for i in {1..2}; do # Because of a bug it needs to be called twice
    curl -X POST \
      -H "accept: */*" \
      -H "Content-Type: application/json" \
      -H "X-Api-Key: $api_key" \
      -d "{\"name\": \"RescanSeries\", \"seriesId\": $series_id}" \
      "$host/api/v3/command"
  done
fi

# Move subtitles back
if ls "$tmp_subtitle_dir"/*.srt &> /dev/null; then
  mv "$tmp_subtitle_dir"/*.srt "$input_dir"
fi
rm -rf "$tmp_subtitle_dir"