Install open source Desktop recorder in Ubuntu

$ sudo apt-get install libav-tools
$ sudo apt-get install yasm

#Install screen recorder
$ git clone git://git.libav.org/libav.git
$ cd libav
$ ./configure
$ make
$ sudo make install

#Capture recording using this command
$ avconv -f x11grab -r 25 -s 1920x1080 -i :0.0 -vcodec libx264 -threads 4 $HOME/output.avi


Now let’s explain the command in short:

avconv -f x11grab is the default command to capture video from the X server.
-r 25 is the frame rate you want, you may change it if you like.
-s 1920×1080 is your system’s screen resolution, change it to your current system resolution, it’s very important to do this.
-i :0.0 is where we want to set our recording start point, leave it like this.
-vcodec libx264 is the video codec that we’re using to record the desktop.
-threads 4 is the number of threads, you may change it as well if you like.
$HOME/output is the destination path where you want to save the file.
.avi is the video format, you may change it to “flv”, “mp4″, “wmv”, “mov”, “mkv”.