A Docker Mod for the LinuxServer.io Radarr/Sonarr v3 Docker container that adds a script to automatically strip out unwanted audio and subtitle streams, keeping only the desired languages.

Beginning with version 2.0 of this mod, it only supports v3 or later of Radarr/Sonarr. For legacy Radarr/Sonarr v2 please use mod release 1.3 or earlier

This unified script works in both Radarr and Sonarr. Use this mod in either container!

NOTE: This mod supports Linux OSes only.

Container info:
Production Container info:

Installation

Pull your selected container (linuxserver/radarr or linuxserver/sonarr) from Docker Hub:
docker pull linuxserver/radarr:latest OR
docker pull linuxserver/sonarr:latest
Configure the Docker container with all the port, volume, and environment settings from the original container documentation here:
linuxserver/radarr
linuxserver/sonarr
1. Add the DOCKER_MODS environment variable to the docker run command, as follows:
  - Dev/test release: -e DOCKER_MODS=thecaptain989/radarr-striptracks:latest
  - Stable release: -e DOCKER_MODS=linuxserver/mods:radarr-striptracks
  Example Docker CLI Configuration
```
docker run -d \
  --name=radarr \
  -e PUID=1000 \
  -e PGID=1000 \
  -e TZ=America/Chicago \
  -e DOCKER_MODS=linuxserver/mods:radarr-striptracks \
  -p 7878:7878 \
  -v /path/to/data:/config \
  -v /path/to/movies:/movies \
  -v /path/to/downloadclient-downloads:/downloads \
  --restart unless-stopped \
  ghcr.io/linuxserver/radarr
```
  Example Synology Configuration
2. Start the container.
Configure a custom script from Radarr's or Sonarr's Settings > Connect screen and type the following in the Path field:
/usr/local/bin/striptracks.sh

Example

The script will detect the language defined in the video profile for the movie or TV show and only keep the audio and subtitles selected.
Alternatively, a wrapper script may be used to more granularly define which tracks to keep. See Wrapper Scripts for more details.

Usage

The source video can be any mkvtoolnix supported video format. The output is an MKV file with the same name.
Chapters, if they exist, are preserved. The Title attribute in the MKV is set to the movie title plus year
(ex: The Sting (1973)) or the series title plus episode information (ex: Happy! 01x01 - What Smiles Are For).
The language of the video file will be updated in the Radarr or Sonarr database to reflect the actual languages preserved in the remuxed video.

If you've configured the Radarr/Sonarr Recycle Bin path correctly, the original video will be moved there.
NOTE: If you have not configured the Recycle Bin, the original video file will be deleted/overwritten and permanently lost.

Syntax

Beginning with version 2.0 of this mod, the script may be called with no arguments. In this configuration it will detect the language(s) defined in the profile (Quality Profile for Radarr, Language Profile for Sonarr) configured on the particular movie or TV show.

Automatic Language Detection

Both audio and subtitles that match the selected language(s) are kept.

Radarr Quality Profile Example

Sonarr Language Profile Example

Note: The intent of the Radarr language selection 'Original' is not well documented. For the purposes of this script, it has the same function as 'Any' and will preserve all languages in the video file.

Command Line Options and Arguments

The script also supports command line arguments that will override the automatic language detection. More granular control can therefore be exerted or extended using tagging and defining multiple Connect scripts (this is native Radarr/Sonarr functionality outside the scope of this documentation).

The syntax for the command line is:
striptracks.sh [OPTIONS] [<audio_languages> [<subtitle_languages>]] OR striptracks.sh [OPTIONS] {-f|--file} <video_file> {-a|--audio} <audio_languages> {-s|--subs} <subtitle_languages>

Where:

Option	Argument	Description
-d, --debug	[<level>]	Enables debug logging. Level is optional. Default of 1 (low) 2 includes JSON output 3 contains even more JSON output
-a, --audio	<audio_languages>	Audio languages to keep ISO639-2 code(s) prefixed with a colon (`:`)
-s, --subs	<subtitle_languages>	Subtitle languages to keep IISO639-2 code(s) prefixed with a colon (`:`)
-f, --file	<video_file>	If included, the script enters Batch Mode and converts the specified video file. WARNING: Do not use this argument when called from Radarr or Sonarr!
--help		Display help and exit

The <audio_languages> and <subtitle_languages> are optional arguments that are colon (:) prepended language codes in ISO639-2 format.
For example:

:eng
:fre
:spa

...etc.

Multiple codes may be concatenated, such as :eng:spa for both English and Spanish.

NOTE: The script is smart enough to not remove the last audio track. This way you don't have to specify every possible language if you are importing a foreign film, for example.

Examples

-d 2                        # Enable debugging level 2, audio and subtitles
                            # languages detected from Radarr/Sonarr
-a :eng:und -s :eng         # Keep English and Unknown audio and English subtitles
:eng ""                     # Keep English audio and no subtitles
-d :eng:kor:jpn :eng:spa    # Enable debugging level 1, keeping English, Korean, and Japanese audio, and English and
                            # Spanish subtitles
-f \"/path/to/movies/Finding Nemo (2003).mkv\" -a :eng:und -s :eng
                            # Batch Mode
                            # Keep English and Unknown audio and
                            # English subtitles, converting video specified

Wrapper Scripts

To supply arguments to the script, one of the included wrapper scripts may be used or a custom wrapper script must be created.

Included Wrapper Scripts

For your convenience, several wrapper scripts are included in the /usr/local/bin/ directory.
You may use any of these scripts in place of striptracks.sh mentioned in the Installation section above.

striptracks-debug.sh       # Use detected languages, but enable debug logging
striptracks-debug-2.sh     # Use detected languages, enable debug logging level 2
striptracks-debug-max.sh   # Use detected languages, enable highest debug logging
striptracks-dut.sh         # Keep Dutch audio and subtitles
striptracks-eng.sh         # Keep English and Unknown audio and English subtitles
striptracks-eng-debug.sh   # Keep English and Unknown audio and English subtitles, and enable debug logging
striptracks-eng-fre.sh     # Keep English, French, and Unknown audio and English subtitles
striptracks-eng-jpn.sh     # Keep English, Japanese, and Unknown audio and English subtitles
striptracks-fre.sh         # Keep French audio and subtitles
striptracks-fre-debug.sh   # Keep French audio and subtitles, and enable debug logging
striptracks-ger.sh         # Keep German audio and subtitles
striptracks-spa.sh         # Keep Spanish audio and subtitles

Example Wrapper Script

To configure the an entry from the Examples section above, create and save a file called striptracks-custom.sh to /config containing the following text:

#!/bin/bash

. /usr/local/bin/striptracks.sh -d :eng:kor:jpn :eng:spa

Make it executable:

chmod +x /config/striptracks-custom.sh

Then put /config/striptracks-custom.sh in the Path field in place of /usr/local/bin/striptracks.sh mentioned in the Installation section above.

Note: If you followed the Linuxserver.io recommendations when configuring your container, the /config directory will be mapped to an external storage location. It is therefore recommended to place custom scripts in the /config directory so they will survive container updates, but they may be placed anywhere that is accessible by Radarr or Sonarr.

Triggers

The only events/notification triggers that have been tested are On Import and On Upgrade

Batch Mode

Batch mode allows the script to be executed independently of Radarr or Sonarr. It converts the file specified on the command line and ignores any environment variables that are normally expected to be set by the video management program.

Using this function, you can easily process all of your video files in any subdirectory at once. See the Batch Example below.

Script Execution Differences in Batch Mode

Because the script is not called from within Radarr or Sonarr, expect the following behavior while in Batch Mode:

The file name must be specified on the command line
(The -f flag places the script in Batch Mode)
No audio or subtitles language auto detection occurs.
Both the audio and subtitles languages must be specified on the command line
The resultant MKV embedded title attribute is set to the basename of the file minus the extension.
The canonical name of the movie/TV show cannot otherwise be determined.
Radarr or Sonarr APIs are not called and their database is not updated.
This may require a manual rescan of converted videos.
Original video files are deleted.
The Recycle Bin function is not available.

Batch Example

To keep English and Unknown audio and English subtitles on all video files ending in .MKV, .AVI, or .MP4 in the /movies directory, enter the following at the Linux command line:

find /movies/ -type f \( -name "*.mkv" -o -name "*.avi" -o -name "*.mp4" \) | while read file; do /usr/local/bin/striptracks.sh -f "$file" -a :eng:und -s :eng; done

Logs

A log file is created for the script activity called:

/config/logs/striptracks.txt

This log can be inspected or downloaded from Radarr/Sonarr under System > Logs > Files

Script errors will show up in both the script log and the native Radarr/Sonarr log.

Log rotation is performed with 5 log files of 512KB each being kept.

NOTE: If debug logging is enabled with a level above 1, the log file can grow very large very quickly. Do not leave high-level debug logging enabled permanently.

Credits

This would not be possible without the following:

Radarr
Sonarr
LinuxServer.io Radarr container
LinuxServer.io Sonarr container
LinuxServer.io Docker Mods project
MKVToolNix by Moritz Bunkus
The AWK script parsing mkvmerge output is adapted from Endoro's post on VideoHelp.
Icons made by Freepik from Flaticon