Read here first to see any currently known issues with streaming that we're working on, before posting a duplicate thread. Feel free to add to any existing threads though, if you have fresh input or want to add your voice to the discussion! Just be polite - streaming is a fairly new feature and very time-consuming to debug.
Known Issues
Incorrect aspect ratio
Streaming can appear in the wrong aspect ratio - this will be addressed in the new streaming engine. See below.