QX11Grab is a system tray applet for X11 desktop environments that uses FFmpeg to recording X11 Desktops and Windows. This Application tapping window dimensions with xevent and prepare the command line for ffmpeg with configuration options. It sends the generated parameter list to a new FFmpeg process. QX11Grab is not the recording software; it prepares all commands for FFmpeg. Features: support for tapping dimensions on single/multi and Xinerama desktops; a metadata input formula; audio/video CODEC table editors with context menus and predefined arguments; a custom command table editor for experts; command line preview for better understanding FFmpeg option sets; a configurable audio capture interface for ALSA/Pulse and OSS devices; bookmark support for better switching of configuration to other CODEC sets; a presets editor for ffpresets; and command line shell script export. QX11Grab also implies a plugin interface for FFmpeg codec filters. Filter Plugins: a drawing text filter dialog; an un/sharpen filter dialog; a Display Aspect Ratio (DAR) dialog; a watermark filter dialog; and a fade (in/out) filter dialog.