man xpra says "The default is generally png, if available." but since I see lossy output sometimes this can't be true anymore? Is the default now x264?
The default is now more often x264 or vpx (when available), so how about:
The default encoding will depend on what is available on both the server and the client.
Sounds fine by me. I also vote for removing obsolete information (like the --max-bandwidth option) so that users are don't get confused so easily.
encoding info updates in r3819
--max-bandwidth had already been removed from trunk.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/376