Pre-Encode Media Files for Playback
I switched over to a different streaming computer with more GPU but less processing power. When playing back media files there was a massive spike in CPU processing - some clips more than others.
So I ran all the clips through Adobe Media Encoder, matching my online streaming settings as close as possible.
Definitely improved the CPU usage but there's still a noticeable spike when the clips play.
Any recommended settings or workaround to do as much pre-encoding as possible to prevent CPU usage (or to shift the work to the GPU).
This shouldn't be a big deal, but the thing that's the issue is with the spiked CPU usage it throws the resolution of Rendezvous sessions out of whack.
Matthew Potter said:
Use a prores (uncompressed) encoding profile. The CPU is used to decode the video when you use things like Mp4 or similar
Joey Daoud said:
Thank you! I was thinking the opposite. I'll give that a go.
Matthew Potter 's advice is correct, assuming you're not using alpha channels. Bugs were reported about high CPU usage when using ProRes with alpha channels, which have never been fixed as far as I know. Nor have we been advised when or if it will be fixed.
Joey Daoud said:
Should add I noticed a spike in CPU and knock on Rendezvous quality when using ProRes 4444 for stinger transitions.
It's the only way I can get alpha channel video out of FCPX. What's a better format for stingers?
This is a known issue that I reported to Telestream back on the 30th of August, 2018 under case number 00599679. This was subsequently given to the development team as a known bug under tracking id # WIRE-15021.
Back in July 2019, Engineering apparently asked QA to try to reproduce the bug, but I am not aware of what happened after that point.
Despite previous monthly meetings requesting updates, Telestream have still not advised when or if this known bug will be fixed.
In summary, you cant use industry standard graphics formats that include with alpha channels, because of high CPU load. But this works fine on competing products.