In this paper I pay attention to video editation issue. Firstly the basic terminology is explained, then the history of analog editation is described and further more even digital editation as well. At this spot, very interesting history of development of this field isn't forgotten and also the architecture of video editing software is described as we know them today. The most used digital forrmats are summarized as well. In next chapters the design of simple video editing application is explained. The applied technologies are briefly described and the decision of the choice is clarified. The result of whole work is a library of tools for video processing applications development demonstrated in a simple application.

The Web Based Audio Editor thesis deals with the requirements specification, selection of technologies and with the implementation itself. The thesis uses modern approaches of HTML5 standards and is divided into the client and the server parts. Both the web application and the server are implemented in JavaScript. The Web based audio editor allows basic editing features like cut, shifting, deleting. All this in multiple audio tracks. The application runs in recent versions of the most widely used web browsers.