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20th August 2020, 06:22 | #7761 | Link | |
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Just my experience |
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20th August 2020, 07:26 | #7762 | Link | |
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20th August 2020, 07:31 | #7763 | Link | |
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20th August 2020, 09:46 | #7764 | Link |
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will give it a try. but it's not a problem, that hdr10+ encoding is not working... it just does not throw out the same number of frames, as source..
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20th August 2020, 10:42 | #7765 | Link |
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Following a recent discussion I had with someone:
Is it still recommended to crop/resize videos to a mod-16 resolution? I remember this was always recommended long time ago with MPEG2/MPEG4-ASP encoders. I know 1080p isn't mod-16 either but after cropping I still either over- or undercrop to get a mod-16 resolution. Someone told me that wouldn't be necessary with x.265 and even x.264 anymore as long as it is mod-2 at least. |
20th August 2020, 12:14 | #7766 | Link |
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Vintage graphic cards used to suffer some performance loss when the output of the video player did not match some memory address boundaries. This era should be over.
Regarding encoding, it doesn't matter so much anymore. A modulo 2 may be necessary due to Chroma Subsampling 4:2:0. A modulo 4 is possibly a recommendable target regarding performance (related to partitions). But modern encoders and video formats allow encoding to dimensions not fitting macroblock (or coding unit) boundaries by encoding the video at the next larger boundary, repeating or mirroring some content, and carrying a crop rectangle telling the decoder to omit the rest. This may typically happen for 1080 encodes being stored with a height of 1088 and being cropped back to 1080 during playback, automatically. PS: ITU standard = theory documents in upper case with dot (H.264), encoder implementation = practical software in lower case without dot (x264). Last edited by LigH; 20th August 2020 at 12:19. |
21st August 2020, 02:40 | #7768 | Link | |
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How do you increase the cache size? Is there a table or formula in order to determine the optimum size? I do 1080p and 2160p Thanks
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21st August 2020, 05:17 | #7769 | Link |
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I use these lines to setup the cache:
SetMemoryMax(20480) SetCacheMode(1) To avoid having to put them in every script, I have them saved in the plugins folder as an .avsi file so it's autoloaded whenever Avs+ is used. I don't think there is a special formula, the required amount depends on your script and the resolution. 20GB should be more than enough, it's just a safe maximum value which will never be exceeded in my use.
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21st August 2020, 05:39 | #7770 | Link | |
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21st August 2020, 06:57 | #7771 | Link |
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It's probably using the Avisynth+ default values. If the program uses a standard Avs+ installation, you can save the avsi file to its plugins folder and it's autoloaded from there. The path is usually C:\Program Files\Avisynth+\plugins64.
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21st August 2020, 08:38 | #7772 | Link | |
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What file name shall I use? Sent from my SM-G988B using Tapatalk
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21st August 2020, 11:02 | #7774 | Link |
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Thanks a lot!
Will experiment soon Sent from my SM-G988B using Tapatalk
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22nd August 2020, 11:18 | #7775 | Link |
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Whats the difference between hevc-aq and aq-mode? Do I have to turn off one of them when encoding?
Which one is better to use?
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23rd August 2020, 14:54 | #7776 | Link | |
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Quote:
source has 171176 frames, encode has 171171 frames... without HDR10+ metadata, encode has 171176 frames...
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23rd August 2020, 15:21 | #7777 | Link | |
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General consensus seems to be that hevc-aq and aq-motion are both sort of experimental features. I know there's at least one user here who really like hevc-aq, though. I'd just note that in CRF mode, hevc-aq will lower bitrates really drastically-- enough to affect visual quality in my experience. It's possible still more efficient than the other aq-modes if you lower your CRF to compensate, but just don't set blindly, is what I guess I'm saying. |
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24th August 2020, 18:32 | #7779 | Link | |||
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aq-mode 3=2 with low luma bias. hevc-aq is really aq-mode 5, and should map to that. I'd suggest some ala:
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The concept of having motion impact AQ is quite straightforward and of obvious benefit, but getting an actual psycho-visually tuned algorithm implemented is...complex. Especially since other things in x265 are also responding to motion and need to be considered. Quote:
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25th August 2020, 09:38 | #7780 | Link |
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I could use some advice to reduce banding on my x265 encodes.
I've noticed on many newer movies (with little to no noise) banding appears on my x265 encodes in difference to the source H.264 video from Blu-ray. I expected encodes with --crf 16 --aq-mode 3 --no-sao --output-depth 10 on the "slower" preset to be more transparent regarding the source video. However, banding occurs especially in dark backgrounds like underwater scenes, night skies and such. My intend is to do this without any additional AVS filters to leave the source video as 'untouched' as possible. From your experience are there any tweaks I can use to force x265 to (obviously) spend more bits into these scenes? |
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