* remove ffmpeg from stream to use opus and vpx, add bunch of todos
* fix testing
* improve download checkout
* fix datachannel download, fix super dirty test clients - setup logic does not belong there
* fix testing
* fix stdin close error
* Refactor stream endpoint, fix encoder thread safety and improve tests
* fix and improve test
* remove not None
* use Enum
* use Enum and add todo
* remove poll
* Add stream helper utilities and IVF frame iterator
* fix lint
* some cosmetics
* fix lint
* changes
* improve test
* improve types and test
* add todo for better bitrate calculation