I changed video.cf to the following
vpxenc = "vpxenc --codec=vp8 -p 1 -t 4 --rt --cpu-used=0 --end-usage=cbr --target-bitrate=20000 --undershoot-pct=95 --buf-sz=6000 --buf-initial-sz=4000 --buf-optimal-sz=5000 -w 1280 -h 720 --fps=30000/1000 -v --kf-max-dist=999999 --min-q=4 --max-q=56"
then running outerra in 1280 x 720 screen things seem to work now..no more audio lag when recording with the outerra recorder

seems problem was "too much data to transmit"