fbgrab

Take a screenshot of the current framebuffer

$ fbgrab [screenshot.png]

$ fbgrab -d [/dev/fb0] [screenshot.png]

$ fbgrab -c [1] [screenshot.png]

$ fbgrab -s [5] [screenshot.png]

$ fbgrab -w [1920] -h [1080] -b [32] -f [framebuffer.dump] [screenshot.png]

$ fbgrab -i [screenshot.png]

fbgrab [options] filename

fbgrab reads the Linux framebuffer device (/dev/fb*) or a dump thereof and saves a PNG image file. It can capture screenshots of virtually any application, from traditional text applications to X-windows desktops and framebuffer applications.
The tool is particularly useful for capturing screenshots on systems without a running X server, embedded systems, or when working directly with the Linux console.

-?

Display usage information.

Ignore the alpha channel. Useful for pixel formats like BGR32 where drivers incorrectly report alpha.

The number of bits per pixel. Optional when reading from device.

Specifies which console (virtual terminal) to grab.

Switch console with a delay before capturing.

Framebuffer device to use. Defaults to FRAMEBUFFER environment variable or /dev/fb0.

Read from file instead of device. Requires -w, -h, and -b options.

The height of the framebuffer in pixels. Optional when reading from device.

Turns off ADAM7 interlacing in the output PNG.

Line length (stride) in pixels between the start of each row. Optional when reading from device.

Seconds to wait before grabbing the screenshot.

Enable verbose output.

The width of the framebuffer in pixels. Optional when reading from device.

Set PNG compression level (0=fast, 9=best).

The -c option may require root privileges or the CAPSYSTTY_CONFIG capability. When reading from a raw dump file, the -w, -h, and -b options must all be specified. The framebuffer device must be accessible with appropriate permissions.

fbgrab was written by Gunnar Monell as a rewrite of fbshot by Stephan Beyer. The tool has been maintained since 2002 and is licensed under GPL version 2.

scrot(1), import(1), xwd(1), screenshot(1)