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. It's currently limited to NVIDIA GPUs and X11 (Wayland with Xwayland does NOT work).
This screen recorder can be used for recording your desktop offline, for live streaming and for nvidia-like instant replay, where only the last few seconds are saved.
Add option to workaround a NVIDIA driver "bug" that causes framerate to drop a bit when recording (overclock memory transfer rate back to normal)
Make it clear when graphics card is not supported
Fix broken replay when recording with audio (possibly broken in normal recording as well)
Allow choosing between mp4, flv and mkv for record/replay. mkv survives system crashes
Re-enable screen-direct, disable h264 forced fallback and use p6 again
Attempt to fix stuttering in video that can happen sometimes (especially when vsync is enabled)
Properly fallback to h264 if hevc is not supported by the gpu
Fix livestreaming: flv does not properly fallback to h264
Use lower preset on older gpus (kepler) and switch to h264 if h265 is not supported
Tune options to try and reduce file size
Better tune quality options for different resolutions
Fix crash caused by invalid memory write when recording audio
Fix possible pulseaudio crash
Fixes some streaming issues (mostly metadata missing)