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Old 17th April 2018, 07:31   #6044  |  Link
Bhavnahari
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Join Date: Nov 2016
Posts: 4
Quote:
Originally Posted by jlpsvk View Post
any suggested quality wise settings recommendation for 4K HDR encoding? with CRF ie 17?
If the data that is being reused comes from encoding a downscaled video (scale-factor=2), it does not make a lot of sense to use intra/inter refinement levels 0/1 as levels 0 and 1 reuse most of the information from the previous pass with no or minimal re-evaluation of analysis information. This can have a huge impact on the quality of the encode.

We have observed that --refine-inter=3 and --refine-intra=4 gives the best quality, even better than standalone x265 encodes in some cases, with a performance gain of up to 1.8X.

For 4K HDR content, you will have to modify the display settings based on the monitor. Please refer the docs for more information - http://x265.readthedocs.io/en/defaul...mation-options
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