[FFmpeg-user] Poor NDI performance

[Jon]

After successfully compiling ffmpeg on Debian 9 64bit, following the
instructions at https://trac.ffmpeg.org/wiki/CompilationGuide and
adding the relevant includes for NDI using the Newtek SDK
(InstallNDISDK_v3_Linux.sh from https://www.newtek.com/ndi/sdk/) and
compiler flag (--enable-libndi_newtek), the resulting builds of ffmpeg
/ ffplay do now playback NDI network streams but playback performance
is poor compared to playing back through OBS using the NDI plug-in
from https://github.com/Palakis/obs-ndi on the same machine. OBS has
smooth playback whereas ffmpeg is jittery.

./ffplay -fs -f libndi_newtek -i "NDI test (test-laptop-pgm)"

Is there anything that can be done to improve performance?