Clapper

Clapper is a free media player for Linux in the Video & Media Players category. It is a GNOME application built with GJS and the GTK4 toolkit, providing a desktop interface for watching video. It is intended for Linux users who want a player that fits the GNOME environment while using established multimedia components.

Playback uses GStreamer as its media backend, while video rendering is handled through OpenGL. Clapper works natively on both Xorg and Wayland, so it is suited to Linux desktops using either display system. For supported hardware, it can use VA-API on AMD and Intel GPUs, NVDEC on Nvidia hardware, and V4L2 on mobile devices.

The interface adapts to the viewing context. In Windowed Mode, it relies mostly on unmodified GTK widgets to align with the surrounding operating system appearance. In Fullscreen Mode, interface elements become darker, larger, and semi-transparent, while Floating Mode shows only the video above other windows for a picture-in-picture-like experience. Mobile-friendly transitions are also supported.

As a Linux media player, Clapper combines GNOME and GTK4 integration with multiple display-server options and hardware-acceleration paths. MirrorNest does not host a mirrored copy of the program; its listing links directly to the official release. This distribution arrangement lets readers obtain the free software from the official release while using MirrorNest as the catalog entry.