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patjak / facetimehd

Reverse engineered Linux driver for the FacetimeHD (Broadcom 1570) PCIe webcam
GNU General Public License v2.0
1.35k stars 160 forks source link

CPU usage? #215

Closed gaul closed 4 years ago

gaul commented 4 years ago

Has anyone compared this driver against the macOS one? I routinely see 90+ degC temperatures during Google Meet and Zoom calls. This throttles my MacBook 2013 down to 800 MHz which drops video and more annoyingly audio.

patjak commented 4 years ago

Just displaying the video stream with qv4l2 shows cpu usage at ~15%. Doing the same with Photo Booth in OSX shows similar numbers. Perhaps video scaling for incoming / outgoing streams is not accelerated in Linux and this gives high CPU load?

gaul commented 4 years ago

I did some tests with cheese and Firefox and it seems that h.264 is hardware accelerated for both. However it seems that Google Meet uses VP9 or some other codec that my aging laptop does not hardware accelerate.