We split it in r8786 (4 years ago) to improve latency in the main UI thread and to prevent gstreamer deadlocking with the clipboard.
Once we move to python3 (#1568) and drop python2 support, then get rid of the GTK clipboard (#812), we can consider moving the gstreamer code back into the main process.
Milestone renamed
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2108