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Old 28th April 2020, 18:58   #14  |  Link
benwaggoner
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Join Date: Jan 2006
Location: Portland, OR
Posts: 4,750
Quote:
Originally Posted by TEB View Post
So for us, we (ISP and Operator) finally got to the point that we had the opportunity to move from a classic static CBR ladder til something better.

We had to decide on how far we wanted to take this into the constant quality domain and we ended up with the conclusion that we wanted to do something between what we have today and what Netflix is doing!
What's the stuff Netflix is doing that you aren't?

Quote:
We ended up with a static ladder based on CRF with a bitrate CAP which gives us a lot of what Netflix is doing, but not going all the way with regards to scene based encoding, title tuning and multiple pre-passes to find the sweet spot etc..

To give an example:
Our top HQ 1080p profile/rung is basically CRF19@15mbps CAP with a fallback of CRF22@8mbps CAP etc..
Do you have documentation on what Netflix is doing with Capped VBR (CVBR)?

Note that CRF itself IS scene-based encoding. There are other flavors of it, but the most basic is not to spend bits where they aren't needed.
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