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

One 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

NOTE: See the Sonarr/Radarr v2 Builds section below for important differences to these instructions for v2 builds.

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.
After the above configuration is complete, to use mkvmerge, 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-eng.sh

Example

This is a wrapper script that calls striptracks.sh with the following arguments, which keep English audio and subtitles only!
:eng:und :eng

For any other combinations of audio and subtitles you must either use one of the included wrapper scripts or create a custom script with the codes for the languages you want to keep. See the Syntax section below.
Do not put striptracks.sh in the Path field!

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).

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

NOTE: The Arguments field for Custom Scripts was removed in Radarr and Sonarr v3 due to security concerns. To support options with these versions and later, a wrapper script must be manually created that will call striptracks.sh with the required arguments.

The script accepts two command line arguments and one option:

[-d] <audio_languages> <subtitle_languages>

The <audio_languages> and <subtitle_languages> arguments 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.
These codes are mandatory. There are no defaults.

The wrapper script noted above uses :eng:und :eng, which will keep English and Undetermined audio and English subtitles.

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.

The -d option enables debug logging.

Examples

:eng:und :eng            # keep English and Undetermined audio and English subtitles
-d :eng ""               # Enable debugging, keeping English audio and no subtitles
:eng:kor:jpn :eng:spa    # Keep English, Korean, and Japanese audio, and English and
                         # Spanish subtitles

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 the striptracks-eng.sh mentioned in the Installation section above.

striptracks-dut.sh         # Keep Dutch audio and subtitles
striptracks-eng.sh         # Keep English and Undetermined audio and English subtitles
striptracks-eng-debug.sh   # Keep English and Undetermined audio and English subtitles, and enable debug logging
striptracks-eng-fre.sh     # Keep English, French, and Undetermined audio and English subtitles
striptracks-eng-jpn.sh     # Keep English, Japanese, and Undetermined 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 last 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 :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-eng.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

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, the log file can grow very large very quickly. Do not leave debug logging enabled permanently.

Sonarr/Radarr v2 Builds

Warning: Legacy Releases
The Sonarr/Radarr v2 Builds of Radarr and Sonarr are no longer being developed and are considered legacy. However, this mod works with all versions of the container.

Important differences for Sonarr/Radarr v2 Builds

Legacy Installation

Substitute the following step for step #3 noted in the Installation section above.
3. After all of the above configuration is complete, to use mkvmerge:

Configure a custom script from the Radarr/Sonnar Settings > Connect screen and type the following in the Path field:
/usr/local/bin/striptracks.sh
Add the codes for the audio and subtitle languages you want to keep as Arguments (details in the Syntax section above):
Suggested Example
:eng:und :eng

Example

Legacy Triggers

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

Legacy Logs

The log can be inspected or downloaded from Radarr/Sonarr under System > Log Files

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