"Motion for OpenTK", or MotionTK for short, is a video playback library for OpenTK built on FFmpeg, inspired by the Motion library for SFML.

I was looking for a lightweight video playback library for OpenTK, but couldn't find anything that met my requirements. From my SFML days I remembered the Motion library by Zachariah Brown, so I rewrote a simplified version of it in C#.

To function properly, this library requires a working copy of OpenTK and some of the FFmpeg libraries. Specifically, these libraries are required:

• OpenTK.dll
• avcodec-58.dll
• avformat-58.dll
• avutil-58.dll
• swresample-3.dll
• swscale-5.dll

OpenTK itself requires OpenGL and OpenAL to be installed.

Videos are loaded by instantiating the DisplaySource class. From there, you can access the VideoPlayback property, which exposes a Draw function to render the current frame as well as the TextureHandle itself. The audio SourceHandle can be accessed via the AudioPlayback property. Playback control functions (Play, Pause and the like) are available via the DisplaySource instance. Don't forget to dispose all disposable instances you create!

For a working example check the "Sample" project included with the sources.

If you experience any problems, please file a GitHub issue or contact me under [email protected].

You are of course also invited to fix it yourself and create a pull request :)

FFmpeg has trouble finding files with non-ASCII characters in their path.