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22nd January 2024, 11:10 | #101 | Link |
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Well, why not try cropping and see what happens. Your player will definitely add them back during playback and you'll save a few bits too.
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22nd January 2024, 12:37 | #103 | Link |
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Hmm.. some things to test would be changing CTU to 32 (or 16 just for debugging) and cropping the border so that the actual active image area would not share a CTU with the border.
Also make sure that it's not a decoder related thing, because we've seen something similar at the bottom of the frame with Amlogic chips when the vertical resolution is not mod-8.
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22nd January 2024, 13:16 | #104 | Link |
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Sadly, no go with the CTU change. It changes the position of the blur somewhat, but it's still visible and not decreased.
Removing the boarders is something I will always avoid. Not everything plays nicely when you do this. My 2023 Sony TV has very good scaling, but it has to be fed normal resolutions, or it will not scale, and instead defaulting to a simple bilinear method. I want to keep a native 4K resolution. Last edited by brad86; 22nd January 2024 at 13:28. Reason: kjuhiuhiu |
22nd January 2024, 13:33 | #105 | Link | |
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Is there some discussion regarding this somewhere?
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22nd January 2024, 13:45 | #106 | Link | |
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I have just switched to Slower preset whilst keeping the parameters I already had for Slow preset. It has absolutely helped removed most of the blocking I was seeing at the edge. Encoding time has now skyrocketed, as expected. Would love to know which setting within Slower is helping solve it, so I can just use that along with the Slow preset. |
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22nd January 2024, 13:56 | #107 | Link | |
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22nd January 2024, 15:12 | #108 | Link | |
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selective-sao=2:no-strong-intra-smoothing:rskip=2:rskip-edge-threshold=3:aq-mode=3:aq-strength=1.3:deblock=-3:-3:amp |
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22nd January 2024, 16:02 | #109 | Link |
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You can see and compare the presets here: https://x265.readthedocs.io/en/master/presets.html.
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22nd January 2024, 17:39 | #110 | Link | |
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22nd January 2024, 22:10 | #111 | Link | |
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Making sure the Sample Aspect Ratio is set correctly (probably 1:1 in your case) possibly can help. |
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23rd January 2024, 23:12 | #113 | Link | |
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Anyone have any theories as to why? |
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3rd February 2024, 12:46 | #114 | Link |
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I can't figure why the higher RD level fixed the issue. Maybe some other parameters were not active unless RD was above 4 ?
I currently have it on 5, but it does add 2-3 hours to any encode. Finding the specific setting would be good, so I can get back that lower encoding time. I went through all the preset parameters table, and still couldn't find what does it. |
3rd February 2024, 14:40 | #115 | Link | |
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I don't know if it also affects the decisions made by psychovisual settings (psy-rd, psy-rdoq), but at least it doesn't enable any other settings that you can do manually using parameters.
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6th February 2024, 00:03 | #116 | Link | |
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I remember having a good theory about why that was, but I don't remember the theory . |
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13th February 2024, 10:20 | #117 | Link |
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It's a weird one. From the encodes I have been doing, it appears that 1080p videos are perfectly fine with rd 4, but if I do anything 4K with the exact same settings used for 1080, I need to increase rd to 5 or I start to get strange artefacts, and not always what was in my initial post. They seem to vary. A common one is small seems/lines, or the odd block which looks like if compression were to miss a few pixels. This is the case with SDR video, or when passing through HDR data for the encode.
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14th February 2024, 20:17 | #118 | Link | |
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