Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion. Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules. |
25th May 2020, 19:12 | #441 | Link |
Registered User
Join Date: Jan 2015
Posts: 1,056
|
Well, that's because the faces ARE stretched, and so is everything else. These images are meant to be displayed on a device with non-square pixels. You need to resize to 640x480 (or some other resolution with a 4:3 aspect ratio) to get everything back to the right shape.
__________________
I ask unusual questions but always give proper thanks to those who give correct and useful answers. |
25th May 2020, 19:27 | #442 | Link |
Registered User
Join Date: Mar 2011
Posts: 4,829
|
Pardon my stupidness, but what's the difference between CG and HQ?
I'm only looking at them on a 1808p display, but I ran the upscaled versions at full size (I only see 1080p worth of picture) then upscaled the DVD encode by roughly the same amount with MPC-HC. The CG versions are an improvement for the CGI. It looks better than I expected, because I was half expecting the upscaling to do things to it I'd hate. I wouldn't mind seeing a live action comparison. The HQ versions are over-sharpened for my taste. 1080p screesnshots.zip |
25th May 2020, 19:33 | #443 | Link | |
Registered User
Join Date: Mar 2011
Posts: 4,829
|
Quote:
|
|
25th May 2020, 19:52 | #444 | Link |
Registered User
Join Date: May 2020
Posts: 77
|
Hello_Hello,
Those are the names of the new models they use. I've done a fair bit of comparison between them and I've run full encodes of both on episodes. HQ typically retains more noise than CG if used on scenes with people in them. CG has stronger default noise filtering and deblocking applied. Gaia-CG is typically criticized for being overly aggressive on noise reduction outside of CG scenes, and for applying a bit too much smoothing. Gaia-HQ is typically criticized for retaining too much noise. I generally prefer Gaia-CG over HQ for even the character scenes, but the models are still under active training and there's going to be a big update dropping in the next few weeks. Neither is perfect. Last edited by JoelHruska; 25th May 2020 at 21:53. |
25th May 2020, 23:05 | #450 | Link | |
Registered User
Join Date: May 2020
Posts: 77
|
Quote:
After a 2x runthrough Gaia-CG, they are noticeably less visible when he changes the angle of his stance. At three passes, they disappear altogether when he's standing at certain angles. Hopefully all of this will be tuneable one day. |
|
26th May 2020, 15:41 | #451 | Link |
Registered User
Join Date: May 2020
Location: Canada
Posts: 49
|
So my previous comments about noise filters had one caveat: I was using Artemis HQ in Topaz, which I have discovered already applies its own denoising. So in actuality, I was denoising twice and that's probably why the image looked too smooth for my tastes.
I've produced some sample clips using Gaia-HQ and Gaia-CG in an effort to see how the noise filters look with those. The filters I tested are MCDegrainSharp, TemporalDegrain2 and QTGMC. I just used the default settings for all of those, so I'm open to suggestions for tweaking. My QTGMC call is QTGMC(InputType=1). These filters are applied before upscaling with Topaz. (I wonder, would there be any theoretical advantage to applying them after upscaling?) I'm trying to find a filter that I could apply to everything, since this project is big enough without having to edit noise filters scene-by-scene. I only ran MCDegrainSharp with Gaia-HQ because it's obvious that the result isn't good - it seems to leave a pattern on the character scenes that doesn't look good. I'm also not too fond of the QTGMC result - perhaps someone can suggest better settings as I'm not very familiar with them. I kind of like the TemporalDegrain2 result, but I fear my eye for detail is lacking as the file size for this one is about half what it is without denoising. TFM and TDecimate were applied before applying the noise filters. Input and output from Topaz was in .png format. These clips were created with ffmpeg libx265, using the slow preset and RF of 20. The clips can be found here. |
26th May 2020, 16:20 | #452 | Link | |
Herr
Join Date: Apr 2009
Location: North Europe
Posts: 556
|
Quote:
Because that setting don't denoise as much (I'd like to know how to make TemporalDegrain2 denoise even less sometimes, but I don't know what setting to use for that). Last edited by Forteen88; 26th May 2020 at 16:24. |
|
26th May 2020, 16:22 | #453 | Link |
Pig on the wing
Join Date: Mar 2002
Location: Finland
Posts: 5,733
|
A suggestion for x265: set the parameter no-sao. SAO will smooth the image even more, sucking out details on its way.
__________________
And if the band you're in starts playing different tunes I'll see you on the dark side of the Moon... Last edited by Boulder; 27th May 2020 at 05:21. |
26th May 2020, 17:58 | #454 | Link |
Registered User
Join Date: May 2020
Location: Canada
Posts: 49
|
Thanks, I'll implement those suggestions and generate some new clips tonight.
Another question, after the denoising I use gradfun3() for debanding since I saw it used elsewhere on this forum. Is this something that should always be used after denoising? |
26th May 2020, 19:01 | #455 | Link |
Pig on the wing
Join Date: Mar 2002
Location: Finland
Posts: 5,733
|
I use debanding (neo_f3kdb) myself in all my encodes as the last item. Using the preset "low", I haven't noticed any ill effects aside from a slight increase in needed bitrate but it should keep those ugly artifacts away.
__________________
And if the band you're in starts playing different tunes I'll see you on the dark side of the Moon... |
27th May 2020, 00:45 | #456 | Link |
Registered User
Join Date: May 2020
Location: Canada
Posts: 49
|
I did a quality comparison and I'm pretty sure that more detail is retained by applying TemporalDegrain2 after upscaling. This makes sense since more detail is available for the input to Topaz.
I made a new clip with TemporalDegrain2(grainLevel=false) applied after upscale and encoded with no-sao. The result is in "S06E06_GaiaHQ_post_TempDeg2.grainLevel0_nosao.mkv" in this folder. I think this result is pretty good. If I zoom in and compare specific frames with the GaiaHQ_NoDenoising clip, I can't see any significant difference in detail but the noise seems significantly reduced. Could use a second opinion to verify my sanity... |
27th May 2020, 02:30 | #457 | Link | |
Registered User
Join Date: May 2020
Posts: 77
|
Quote:
https://i.imgur.com/YXqP44c.png What does Gaia-CG look like with these settings? |
|
27th May 2020, 02:48 | #458 | Link | |
Registered User
Join Date: May 2020
Location: Canada
Posts: 49
|
Quote:
|
|
|
|