I've found one problem in current Eridani branch (courtesy of bad Polycom
I still got one HDX with old firmware. It reports itself as h.264 level 2.2
capable. At 720p opal sees level 2.2 and by trying to conform to this level
drop fps down to 5 frames per second.
Problem that fps goes down only for encoder while v4l2 module still supply
frames at full rate. In this case encoder goes way out of it's bandwidth