How to Start mpv in Fullscreen Mode by Default?

This article provides a quick overview and guide on how to launch the mpv media player directly into fullscreen mode using command-line arguments. You will learn the exact flags to use, how to make the setting permanent via configuration files, and troubleshooting tips for different operating systems.

The Fullscreen Command-Line Argument

To launch mpv in fullscreen mode from your terminal or command prompt, you simply need to pass the --fs or --fullscreen flag when opening a file.

mpv --fs video.mp4

Both arguments function identically and force the video window to occupy the entire screen immediately upon launching.

Making Fullscreen the Default Behavior

If you prefer mpv to always open in fullscreen mode without typing the flag every time, you can add it to your configuration file (mpv.conf).

Finding Your Configuration File

Depending on your operating system, the mpv.conf file is typically located in one of the following directories:

Updating the File

Open or create the file in a text editor and add the following line:

fs=yes

Once saved, mpv will automatically apply the fullscreen setting every time a video is launched, regardless of whether you open it from the command line or by double-clicking a file.