The project was developped by a request from StreamUK company. They wanted an application which could multiplex four AVI files in 2x2 view. Additionally, the application should create audio track which contains all audio tracks of source video. We used DirectShow internal features for decompressing video and compressing it. For image processing, video multiplexing and logo (or banner) addition we used OpenCV library. The application contains web based control which queries current active jobs, their progress and ability to stop them. This project is part of following website which is done to promote a Sony product: http://www.walkmanproject.com/