MOVED — Please find the documentation on GitHub now!


For Windows you additionally need to download ffmpeg from Zeranoe (32-bit Builds (Static)) and extract ffmpeg.exe into the same directory as slowmoUI.exe . Please upgrade to 0.3.1 as older versions do not work anymore with current ffmpeg versions.

On Linux, if slowmoVideo crashes in a file dialog with an error message like QSpiAccessible::accessibleEvent not handled , removing qt-at-spi should fix the problem.

Windows 0.3.1 .7z (59 MB) 0.3.1 .zip (94 MB)
Ubuntu PPA on Launchpad
openSUSE openSUSE on Packman
Sources .bz2 (430 KB) GitHub git
Older systems 0.2.4-1 i386.deb (11.10) (7.3 MB) 0.2.4-1 i386.deb (10.04 LTS) (7.0 MB) 0.2.4-1 amd64.deb (11.10) (7.4 MB) 0.2.4-1 amd64.deb (10.04 LTS) (7.0 MB)

Older packages can be found here.

Mac OS X

There is no native port yet for OS X, but Wine or Crossover allow to run the Windows build:

  1. Download slowmoVideo for Windows and unzip it
  2. Download the ffmpeg Win32 static builds from Zeranoe and place ffmpeg.exe in the same directory as slowmoUI.exe
  3. Install Winebottler or Crossover ($)
  4. Open slowmoVideo with Wine from Winebottler or with Crossover

Don’t forget to use control (Ctrl) instead of command (Cmd) for Undo and other operations.


In a nutshell:

slowmoVideo runs on Linux and on Windows. It comes with two algorithms for calculating the Optical Flow, a CPU based one from OpenCV and a GPU based one from GPU-KLT+FLOW.

The GPU flow program (optional) is called flowBuilder and usually produces evidently better results. Is not yet available for Windows.

slowmoVideo is not yet available on OS X since the author does not have a Mac. It should compile easily however. Help is appreciated :)


The following instructions are only important for you if you want to develop slowmoVideo or if there is no package for your distribution.

First you may have to resolve some dependencies. CMake will most likely inform you about missing packages as well, just in case some are missing here.

Installing the required packages …

Some distribution specific installation instructions:


Note: On debian, the OpenCV package is called libopencv-dev, on Ubuntu it is just opencv-dev.

apt-get install build-essential cmake git ffmpeg libavformat-dev libavcodec-dev libswscale-dev libqt4-dev freeglut3-dev libglew1.5-dev libsdl1.2-dev libjpeg-dev libopencv-video-dev libopencv-highgui-dev opencv-dev

For Ubuntu 14.04 follow these build instructions:

$ sudo apt-get install build-essential cmake git libavformat-dev libavcodec-dev libswscale-dev libqt4-dev freeglut3-dev libglew1.5-dev libsdl1.2-dev libjpeg-dev libopencv-video-dev libopencv-highgui-dev libopencv-dev $ sudo add-apt-repository ppa:jon-severinsson/ffmpeg $ sudo apt-get update $ sudo apt-get install ffmpeg $ git clone git:// $ cd slowmoVideo/ $ mkdir build $ cd build/ $ cmake -DENABLE_TESTS=FALSE ../src $ make $ sudo make install


For ffmpeg you may need to add the rpmfusion repository first, as explained here.

yum install cmake ffmpeg ffmpeg-devel git qt4-devel gcc-c++ glew-devel glut-devel SDL-devel libpng-devel libjpeg-devel opencv-devel


As with Fedora, an additional repository is required for ffmpeg, Packman.

zypper in cmake ffmpeg libffmpeg-devel git libqt4-devel gcc-c++ glew-devel freeglut-devel libSDL-devel opencv-devel

… and compiling slowmoVideo

You can get the source code by either downloading the .bz2 archive, or by using git — latter is the recommended way as you can easily update the sources. Git works as follows:

Source code checkout

$ git clone git:// $ cd slowmoVideo $ git pull # Run this whenever you want to update to the latest source code version

Now slomoVideo needs to be compiled and installed. (Note: This has changed recently, and flowBuilder does not need to be compiled separately anymore.)


$ mkdir build $ cd build $ cmake ../src $ make -j3 $ sudo make install

If you want to install slowmoVideo to a different directory (e.g. your home directory) so you don’t need root rights, run cmake as below instead. By default, slowmoVideo is installed to /usr/local/bin/ .

Different install directory

$ cmake ../src -DCMAKE_INSTALL_PREFIX=/home/archibald/slowmoVideo

If all of this worked, you should be able to run slowmoUI . If not, please find help in the Google+ community.