Which open-source video communication software is easier to add your own type of encryption to?

Question

Video

There is a task to develop software for video communications, including audio, ideally with messaging. Conference calling is not required. It is only necessary that two computers via the Internet be able to conduct audio-video communication and exchange messages. In this case, you need to implement your own encryption similar to the Vernam cipher (on both machines, with a limited speed, the same keys are generated). If you do not take into account other factors such as PL, then which open source is easier to modify for this task?

Answer 1

do you need to reinvent the wheel? secushare.org/comparison