Screencasts and Desktop Recording
Several utilities allow you to capture your desktop (and then create a screencast from it).
FFMPEG with x11grab
FFMPEG includes x11grab, a module for screen capture. This method gives the best results for screencaptures and is one of the most flexible methods, allowing a variety of audio inputs and audiovisual output formats. FFMPEG must be installed first (sudo apt-get install ffmpeg). See here for more details. In brief, an example command to capture to an .avi file using the X264 video codec and lossless 16-bit sound would be:
ffmpeg -f alsa -ac 2 -ab 192k -i pulse -f x11grab -s 1024x768 -r 30 -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 /home/user/capturedvideo.avi
recordMyDesktop (Desktop Session Recording)
recordMyDesktop is a desktop recording utility, which has both pyGTK and a pyQT4 GUI frontends available. Recordings are saved in Theora video/Vorbis audio files. Only the Gtk version is available from the repositories (but it works well with KDE/Kubuntu nevertheless). To install with the gtk GUI:
sudo apt-get install gtk-recordmydesktop
Using recordMyDesktop with PulseAudio
- If you have not installed Pulse Audio Controls and Volume utility, they are useful for monitoring your pulse audio devices:
sudo apt-get install pavucontrol paprefs padevchooser
- Change the recordMyDesktop settings so that the capture device is the one you select through pulse audio:
- gtk-recordMyDesktop -> Sound Quality (ticked) -> Advanced -> Sound -> Device: pulse
This sets recordMyDesktop to use whichever input device(s) are selected through pulse audio. If you have several input devices, all of them will be recorded. This is an easy way to mix inputs.
RecordItNow is a KDE frontend for recordMyDesktop. Install:
sudo apt-get install recorditnow
Istanbul (Desktop Session Recording)
Istanbul is a desktop recorder for the Gnome desktop. It records your session into an OGG Theora video file.
sudo apt-get install istanbul
xvidcap (Desktop Session Recording)
xvidcap is a utility to capture your desktop as a video. Install:
sudo apt-get install xvidcap
WebCamStudio creates a virtual webcam that can mix several video sources together and can be used for live broadcasting. See the website for installation instructions.
Wink (Presentation Editor)
Wink is a open source tutorial and presentation editor. It allows you to capture screenshots and use them for presentations. Download the .tar.gz source package, install using these instructions, and follow one of the user guides.
wget -O winkcurrent.tar.gz http://www.digital2b.com/mirror_wink/wink15.tar.gz
Note: Wink is a 32-bit application. If you are running a 64-bit system, make sure ia32-libs is installed first:
sudo apt-get install ia32-libs
Freeseer (Presentation capture)
- See this Screencast section.
KSnapshot (Screen Capture)
KSnapshot is the default screen capture program included with Kubuntu. Run:
- K menu -> Graphics -> KSnapshot Screen Capture program
The Print Screen key will run Ksnapshot and capture the whole screen, by default.
rtmpdump (Capture streaming video)
Rtmpdump allows the capture of many types of streaming video. Current installation instructions are at the website.
- Here are old installation instructions:
sudo apt-get install build-essential checkinstall libssl-dev wget http://rtmpdump.mplayerhq.hu/download/rtmpdump-2.3.tgz tar xvf rtmpdump-2.3.tgz cd rtmpdump-2.3 make SYS=posix sudo checkinstall sudo ldconfig
When prompted during installation, name the package rtmpdump.