xpra launcher seems to handle encoding improperly.
When I select "Raw RGB + zlib/lz4/lzo (24/32bpp)" and connect, the encoding is still "H.264". It can be changed afterwards (using the tray menu).
The same problem appears with an *.xpra file: I have the line
encoding=rgb
in the xpra file, double-click it, connect and the encoding is set to "H.264".
Windows client "Xpra 0.14.11", Rev 8096
Should be fixed in r8141. (will backport)
Backport was in r8148. A beta 0.15 build with the fix is available.
Closing, feel free to re-open if I've missed anything.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/738