uosc is a feature-rich minimalist proximity-based UI for mpv.
This is free and open source software.
Features include:
- UI elements hide and show based on their proximity to cursor instead of every time mouse moves. This provides 100% control over when you see the UI and when you don’t. Click on the preview above to see it in action.
- When timeline is unused, it can minimize itself into a small discrete progress bar.
- Build your own context menu with nesting support by editing your input.conf file.
- Configurable controls bar.
- Fast and efficient thumbnails with thumbfast integration.
- UIs for:
- Selecting subtitle/audio/video track.
- Downloading subtitles from Open Subtitles.
- Loading external subtitles.
- Selecting stream quality.
- Quick directory and playlist navigation.
- All menus are instantly searchable. Just start typing.
- Mouse scroll wheel does multiple things depending on what is the cursor hovering over:
- Timeline: seek by timeline_step seconds per scroll.
- Volume bar: change volume by volume_step per scroll.
- Speed bar: change speed by speed_step per scroll.
- Just hovering video with no UI widget below cursor: your configured wheel bindings from input.conf.
- Right click on volume or speed elements to reset them.
- Transforming chapters into timeline ranges (the red portion of the timeline in the preview).
- A lot of useful options and commands to bind keys to.
- API for 3rd party scripts to extend, or use uosc to render their menus.
Website: github.com/tomasklaen/uosc
Support:
Developer: Tomas Klaen
License: GNU Lesser General Public License v2.1

uosc is written in Lua. Learn Lua with our recommended free books and free tutorials.
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