Integrating video support into the new Woize SIP-client

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With VoIP services becoming more and more popular and, even beginning to compete with the PSTN (Public Switched Telephone Network) in terms of prices and wide use, companies that provides this service has to evolve to keep their customers and be competitive. Woize Ltd. is one of these companies and as a mean to strengthen their position on the market they want to integrate video call support and video conferencing to their new VoIP-client. This thesis is aimed at helping Woize Ltd. choosing an appropriate video codec and finding an appropriate API for integrating video into their new SIP-powered VoIP-client. The decisions and paths taken in this work are all a product of Woize Ltd's requirements and preferences. In this report there is a description of how and why the codec and API were chosen. The report then describes the API, its features and, the problems that were encountered when setting it up on two of the platforms Woize Ltd are aiming for. Different encoding tweaks of the Theora codec are also tried out to see what quality is acceptable with different bitrates. These are the main objectives. Further on an attempt on implementing a reference model for streaming video on different platforms are conducted, which proved to be more problematic than was expected in the beginning. The results will show that it is possible to integrate video calls into a VoIP client using this economical method, even though an applicat...