faps

Yet another Fraps for Linux (name comes from "Frames & Actions Per Second", seriously :)

Features

launches a special process faps-daemon to listen raw key events on /dev/input/eventX
robustly detects all keyboard devices with libudev
works with full screen SDL games which are known to grab the entire keyboard and make XGrabKey useless
during install faps-daemon is given capabilities with setcap "CAP_DAC_READ_SEARCH+pe" and does not require root access during normal operation
faps-deamon measures APM (actions per minute) based on the key press events from the last 10 sec (configurable), with a linear weighting applied (from 0 to 2)
faps-daemon communicates with main program through a fifo
faps-daemon kills itself if client disconnects from fifo, no way to hang in the background
for FPS measuring the library faps-lib.so uses LD_PRELOAD to hook the Xlib buffer swap function glXSwapBuffers (does not work with SDL though, need better method)
FPS and APM displayed in overlay
screen & video capture not implemented yet

Installation

On 64 bit systems use make all to compile both the 64 and a 32 bit version of the dynamic library (requires the [multilib] version of your dev tools to be installed; see Arch Wiki for details).

make all
sudo make install

The 32 bit version is required for Steam. Run Steam with:

faps -p 32 steam

On 32 bit systems and vanilla x86_64 just do the usual:

make
sudo make install

I will make an Arch AUR package when it's complete.

Hotkeys

Ctrl + F9 toggle FPS (frames per second) overlay
Ctrl + F10 toggle APM (actions per minute) overlay
Ctrl + F11 start/stop video capture
Ctrl + F12 take screenshot

Usage

faps [faps arguments] program [program arguments]

-u N FPS update interval in msec (default: 1000)
-v N APM update interval in seconds (default: 1)
-f N framerate limit in frames per second
-p 32 loads the 32 bit version of the library on a x86_64 system (eg: for Steam beta)
-i N interval in seconds to be used when computing APM (default: 10)

Unlicense

faps is free and unencumbered public domain software. For more information, see http://unlicense.org/.

mmn80 / faps