How we scaled Google Meet during Covid-19

Re:How we scaled Google Meet during Covid-19 by londons_explore on Friday August 07, 2020 @02:51AM (#24079082)

This is mostly a limitation of Chrome and other web browsers.

When streaming the desktop, the browser doesn't get notified when some region on the screen changes. That means it has to retrieve a bitmap of the screen and 'diff' it with every frame, which is computationally heavy.

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Re:How we scaled Google Meet during Covid-19 by giovannibajo1 on Friday August 07, 2020 @03:46AM (#24079395)

FWIW, AirPlay can send a H264 video of my desktop at 60FPS with ~0% CPU impact (hardware accelerated), good enough to play many games on TV.

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Re:How we scaled Google Meet during Covid-19 by londons_explore on Friday August 07, 2020 @07:19AM (#24080677)

I believe Airplay has special OS integration - a third party app wouldn't have access to the screen buffer with zero-copy.. A third party app would at a minimum have to copy the data to system memory and back to the GPU, using a lot of CPU time for that alone, before any encoding.

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