I can't remember exactly which one, but an earlier 6.x build included a major refactoring of our encoding methods to increase performance. This likely would have been implemented since that original request was made. We are also scheduled to take another deep dive into performance on both the web server and the relay within the next 3ish months.

With that said, there are currently no other encoding options other than High/Medium/Low. If you are interested in more please register something within our product feedback portal.

This request isn't exactly what you're looking for but might be useful in your situation.