GPU Screen Recorder
This is a screen recorder that has minimal impact on system performance by recording a window using the GPU only, similar to shadowplay on windows. This is the fastest screen recording tool for Linux. This software works with X11 and Wayland.
The source code is available at https://git.dec05eba.com/gpu-screen-recorder/ and the source code for the gui is available at https://git.dec05eba.com/gpu-screen-recorder-gtk/