vp8 v/s vp9 encoder in terms of performance

[VPoddubchak]

Hi! I faced with the same problem. 
I have i7 CPU and try to find configuration of vp9enc to achieve "live"
speed.
I tried many combinations and have the same results. 
For now, I run this command:

gst-launch-1.0 -v autovideosrc ! videoconvert !
video/x-raw,colorimetry=bt601,width=640,height=480 ! vp9enc deadline=1
threads=3 cpu-used=5 end-usage=1 target-bitrate=1000000 ! vp9dec !
autovideosink

resulting video has delay about 5 sec and about 1-2 fps

If my PC is slow then how Chrome encodes my video in realtime in VP9 codec
when I connect by it to webconference? 
Is it because of hardware acceleration in Chrome ?




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