Jellyfin MPV Shim (Cast to MPV on Linux/Windows)

Jellyfin MPV Shim

Jellyfin MPV Shim is a simple and lightweight Jellyfin client, with support for Windows
and Linux. Think of it as an open source Chromecast for Jellyfin. You can cast almost
anything from Jellyfin and it will Direct Play. Subtitles are fully supported, and
there are tools to manage them like no other Jellyfin client.

This project is new, but all the major features should now be working! Please let me
know if you have any problems.

Source Repository:

Getting Started

If you are on Windows, simply download the binary.
If you are using Linux, please see the Linux Installation section.

To use the client, simply launch it and log into your Jellyfin server. You can then cast your media
from another Jellyfin application. Unlike Plex MPV Shim, authorization tokens for your server
are stored on your device, but you are able to cast to the player regardless of location.

If you want to add multiple servers, you can do so when you initially log in. You can also
start the program with the add parameter to add more servers at a later time.

Advanced Features


To open the menu, press c on your computer. Depending on what app you are
using to control Jellyfin, you may also be able to open the menu using that app.
The web application currently doesn’t have the required buttons to do so.

The menu enabled you to:

  • Adjust video transcoding quality.
  • Change the default transcoder settings.
  • Change subtitles or audio, while knowing the track names.
  • Change subtitles or audio for an entire series at once.
  • Mark the media as unwatched and quit.

On your computer, use the arrow keys, enter, and escape to navigate. On your phone, use
the arrow buttons, ok, back, and home to navigate. (The option for remote controls is
shown next to the name of the client when you select it from the cast menu.)

Please also note that the on-screen controller for MPV (if available) cannot change the
audio and subtitle track configurations for transcoded media. It also cannot load external
subtitles. You must either use the menu or the application you casted from.

Keyboard Shortcuts

This program supports most of the keyboard shortcuts from MPV. The custom keyboard shortcuts are:

  • < > to skip episodes
  • q to close player
  • w to mark watched and skip
  • u to mark unwatched and quit
  • c to open the menu

Here are the notable MPV keyboard shortcuts:

  • space - Pause/Play
  • left/right - Seek by 5 seconds
  • up/down - Seek by 1 minute
  • s - Take a screenshot
  • S - Take a screenshot without subtitles
  • f - Toggle fullscreen
  • ,/. - Seek by individual frames
  • [/] - Change video speed by 10%
  • {/} - Change video speed by 50%
  • backspace - Reset speed
  • m - Mute
  • d - Enable/disable deinterlace
  • Ctrl+Shift+Left/Right - Adjust subtitle delay.


The configuration file is located in different places depending on your platform. When you
launch the program, the location of the config file will be printed. The locations are:

  • Windows - %appdata%\jellyfin-mpv-shim\conf.json
  • Linux - ~/.config/jellyfin-mpv-shim/conf.json
  • Mac OSX - Library/Application Support/jellyfin-mpv-shim/conf.json
  • CygWin - ~/.config/jellyfin-mpv-shim/conf.json


You can adjust the basic transcoder settings via the menu.

  • always_transcode - This will tell the client to always transcode, without asking. Default: false
    • This may be useful if you are using limited hardware that cannot handle advanced codecs.
  • transcode_h265 - Transcode HEVC videos. Default: false
  • transcode_hi10p - Transcode 10 bit color videos. Default: false
  • remote_kbps - Bandwidth to permit for remote streaming. Default: 2000
  • local_kbps - Bandwidth to permit for local streaming. Default: 2147483

Shell Command Triggers

You can execute shell commands on media state using the config file:

  • media_ended_cmd - When all media has played.
  • pre_media_cmd - Before the player displays. (Will wait for finish.)
  • stop_cmd - After stopping the player.
  • idle_cmd - After no activity for idle_cmd_delay seconds.

Subtitle Visual Settings

All of these settings apply to direct play and are adjustable through the controlling app. Note that some may not work depending on the subtitle codec. Subtitle position and color are not available for transcodes.

  • subtitle_size - The size of the subtitles, in percent. Default: 100
  • subtitle_color - The color of the subtitles, in hex. Default: #FFFFFFFF
  • subtitle_position - The position (top, bottom, middle). Default: bottom

Other Configuration Options

  • player_name - The name of the player that appears in the cast menu. Initially set from your hostname.
  • client_uuid - The identifier for the client. Set to a random value on first run.
  • audio_output - If set to hdmi it disables volume adjustment. Default: hdmi
  • allow_http - Allow insecure Jellyfin server connections. Default: true

MPV Configuration

You can configure mpv directly using the mpv.conf file. (It is in the same folder as conf.json.)
This may be useful for customizing video upscaling, keyboard shortcuts, or controlling the application
via the mpv IPC server.


If you’d like to run the application without installing it, run ./
The project is written entierly in Python 3. There are no closed-source
components in this project. It is fully hackable.

The project is dependent on python-mpv, requests, websocket_client, urllib3, and six. There are no other
external dependencies.

This project is based Plex MPV Shim, which is based on, which
is available under the terms of the MIT License. The project was ported to python3, modified to
use mpv as the player, and updated to allow all features of the remote control api for video playback.

The Jellyfin API client comes from Jellyfin for Kodi.

Linux Installation

If you are on Linux, you can install via pip. You’ll need libmpv1.

sudo pip3 install --upgrade jellyfin-mpv-shim

The current Debian package for libmpv1 doesn’t support the on-screen controller. If you’d like this, or need codecs that aren’t packaged with Debian, you need to build mpv from source. Execute the following:

sudo pip3 install --upgrade python-mpv
sudo apt install autoconf automake libtool libharfbuzz-dev libfreetype6-dev libfontconfig1-dev libx11-dev libxrandr-dev libvdpau-dev libva-dev mesa-common-dev libegl1-mesa-dev yasm libasound2-dev libpulse-dev libuchardet-dev zlib1g-dev libfribidi-dev git libgnutls28-dev libgl1-mesa-dev libsdl2-dev cmake wget python g++ libluajit-5.1-dev
git clone
cd mpv-build
echo --enable-libmpv-shared > mpv_options
./rebuild -j4
sudo ./install
sudo ldconfig

Building on Windows

There is a prebuilt version for Windows in the releases section. When
following these directions, please take care to ensure both the python
and libmpv libraries are either 64 or 32 bit. (Don’t mismatch them.)

  1. Install Python3 with PATH enabled. Install 7zip.
  2. After installing python3, open cmd as admin and run pip install --upgrade pyinstaller python-mpv requests websocket_client urllib3 six.
  3. Download libmpv.
  4. Extract the mpv-1.dll from the file and move it to the jellyfin-mpv-shim folder.
  5. Open a regular cmd prompt. Navigate to the jellyfin-mpv-shim folder.
  6. Run pyinstaller -cF --add-binary "mpv-1.dll;." --icon media.ico
1 Like

This post is now outdated and cannot be revised. Please do not refer to details.

I’ve hidden the post for you. I don’t know how to give people extended editing permissions past 30 days, without also making them a moderator. I’ll have to figure something out with Discourse.

Thanks. I’m pretty sure there is an option to change the edit time since there are other Discourse forums that allow editing after 30 days.

But I wouldn’t really worry about it. There are other places, such as the official docs, to find out about this client.