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30th July 2020, 08:17 | #1 | Link |
Registered User
Join Date: Jul 2020
Posts: 76
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X265 slow preset further adjustments modifications?
In trying to encode 4k hdr blurays in staxrip, with transparency as the goal. I use the slow preset and crf 20 ssim tune (using this for testing, will get rid of once ive settled on the settings).
Is there any further adjustments i can make in staxrip to improve things a little bit further without going to far into the diminishing returns territory? And without slowing things down to a crawl (more of a crawl than it already is). Another question, im trying to retain hdr, and ive selected the hdr injest option, thinking i need this to do it, but its producing 2 files at the end with slightly different mediainfo information. "Name"_new.mkv looks normal in media info. But the second file "name_new.mkv_hdr10.mkv has different mastering display luminance, max cll, and max fall, with an aditional line under each, saying the original information. Which on of these is correct? |
30th July 2020, 09:29 | #2 | Link |
ffx264/ffhevc author
Join Date: May 2007
Location: /dev/video0
Posts: 1,844
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you can increase psy-rd and psy-rdoq and with hme=umh,umh,star you can shave off between 100 and 200 MB but it'll slow down the encoding a bit
personally i use a psy-rd of 3.3 and psy-rdoq of 16. It really helps in dark scenes. qcomp of 0.7 is also worth a try |
31st July 2020, 11:06 | #4 | Link | |
Registered User
Join Date: Jul 2020
Posts: 76
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Quote:
I use 18 for 1080p blurays and that has been fine. I thought with higher resolutions, you can use higher crfs, so thats why i started with 20. |
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31st July 2020, 11:20 | #5 | Link |
Pig on the wing
Join Date: Mar 2002
Location: Finland
Posts: 5,733
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The thing with HDR stuff requiring a lower CRF for the same quality level is that the image is very flat so the encoder will give it much less bits compared to SDR at the same CRF. I use settings close to --preset slower and CRF 15 + qcomp 0.7 for 1440p and CRF 16 + qcomp 0.7 for 1080p encodes with HDR.
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Tags |
hdr, settings, slow, staxrip, x265 |
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