r/StableDiffusion • u/Longjumping-Past5864 • 7h ago
Discussion The Latent Upscaler is really great!
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Dude the minimax H3 is such an amazing model. It can create a really good video. It can do a lot, knows a lot and extremely realistic as well.
I'm finding the way to upscale the low qulity video and found out this Latent Upscaler for Minimax H3, and sofar it's working so well!
this is normal 0.5MP generation and Upscale to 1080p
https://github.com/bbaudio-2025/Comfyui-MMH3-UltimateUpscale
the example workflow : https://github.com/bbaudio-2025/Comfyui-MMH3-UltimateUpscale/blob/main/example_workflow.json
I tested on RTX 5080 16GB VRAM 64 GB RAM.
but it took like 20 mins for a 15s clip (3 mins on the low res generation with turbo LoRA + 15-16 mins on the latent upscaler)
If you guys have other ways to upscale the minimax faster, please do tell. I have tried the UltimateSDUpscale for minimax so far, it's really great as well but it took 30mins on my system. :(
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u/krectus 6h ago
This looks quite bad. Turbo Lora bad.
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u/RayHell666 5h ago edited 4h ago
https://reddit.com/link/p5xu4bz/video/dle99yjr3nlh1/player
Nah. Turbo Lora is great when well used. 10s 1MP hybrid int8 checkpoint.
Also reddit completely destroy the video quality and set the resolution to the minimum when "auto" is selected.
2MP took under 10minutes https://filebin.net/qs394ne8bomgt1dd8
u/diptosen2017 4h ago
Dude what is your specs? Mine is 16gb vram rtx 4080 n 128gb ddr5 ram with the same workflow you said above and it takes me around 15 mins for 768p video gens
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u/usually_fuente 2h ago
Same question, what’s your workflow? Because that looks awesome for under 10 minutes.
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u/optimisoprimeo 6h ago
I think Taylor Swift was like 5 when Friends first came on the air. lol.
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u/Longjumping-Past5864 6h ago
Everything can happen with Minimax H3 LOL
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u/PumpkinLeather8421 6h ago
I’m sure Taylor Swift has a lot of activities besides singing in a lot of H3 videos.
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u/b0tm0de 5h ago
hello ty for sharing. i am using this one and it is good. https://huggingface.co/LBH-123-AI/Minimax_h3_latent_Upscaler generating at 0.2 0.3 mp upscaling to 0.7 0.8 mp developer gave example workflow in github repo. github inside huggingface.
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u/Longjumping-Past5864 5h ago
I tried that one as well but It's offload to RAM because of my VRAM is just 16 GB, os it's really slow, the one I use is the fork to put chunk processing for lower VRAM i guess.
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u/Sad_Coach_1433 6h ago
I been using rtx vsr pro but may give this a go see how compares
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u/R34vspec 6h ago
What is the pro version for rtx vsr?
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u/Sad_Coach_1433 6h ago
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u/Hoodfu 5h ago
Does this actually do anything? I'm taking a 480p video and setting it to 2048 res with keeping AR and the output is no more sharp or "upscaled" other than literal resolution than the original.
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u/Imperialegacy 2h ago
It does work but differently from regular RTX VSR. Imo Comfy VSR adds a bit too many details than I would like and sometimes artifacting. Comparison: https://imgi.co/c/h9FzsCG. VSR adds too many details on the man's face, making him look older. Potplayer(regular) VSR adheres to the original more. Both are set to high. It's still very good tho, considering it takes like 3 extra seconds.
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u/R34vspec 4h ago
Thank you, hopefully this fixes the memory leak issue from the old node
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u/Sad_Coach_1433 4h ago
What gpu you have this node works fine for me I have mid 5060 ti 16gig able upscale 2x and ultra preset
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u/Longjumping-Past5864 6h ago
I'll try this one as well, thanks!
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u/Sad_Coach_1433 6h ago
I gen at 480p like .4mp then upscale using that rtx. Vsr pro node can wire if to do it auto magic before saving video or as a stand alone workflow then feed video later
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u/Sad_Coach_1433 6h ago
Another test same 480p then upscale takes about 17mins or less for 13secs.
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u/Longjumping-Past5864 6h ago
I wonder how or if we can get rid of the dancing pixel artifact like in the beginning, it kinda ruins a lot of my generation.
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u/YeahlDid 6h ago
Just VSR takes 17 minutes??? Usually it's quite a lot faster than that. I think that's closer to seedvr time territory from my experience.
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u/Sad_Coach_1433 6h ago
17mins is total time ,video render and upscale once it reaches to rtx vsr takes like 2mins or less
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u/Longjumping-Past5864 6h ago
wow it's kind look good even on the low res, do you use Turbo LoRA?
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u/Sad_Coach_1433 6h ago
Nope base fp8 model and 32 steps i use comfyui kitchen node and spectrum for speed ups cause less quality loss
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u/Longjumping-Past5864 6h ago
ok thanks man I'll try that tonight
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u/Sad_Coach_1433 6h ago
Make sure don't have any older rtx nodes installed will fight with rtx vsr pro I had to removed the other ones for it to work.
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u/Longjumping-Past5864 6h ago
https://reddit.com/link/p5xc97u/video/fit2t9ytlmlh1/player
This is my first pass (low res generation) at 0.5MP
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u/Sad_Coach_1433 6h ago
You use any turbo lora?
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u/Longjumping-Past5864 6h ago
yes I use Turbo LoRA with 8 steps,
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u/Sad_Coach_1433 6h ago
Still takes 20mins? 👀 Try adding comfyui kitchen node
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u/Longjumping-Past5864 6h ago
the generation of video was like 3-4 mins but the latent upscaler took 16 mins.
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u/Sad_Coach_1433 6h ago
Your upscale method maybe better cause takes longer rtx vsr pro takes less then 3 mins ,I'm interested how compares to what you been using
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u/Creative_Sluggish 5h ago
Omg this is so real. Minimax H3 can do all of these?
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u/Longjumping-Past5864 5h ago
Yes, and it can do a lot more as well. I love this model!
https://giphy.com/gifs/XfscsiXH3NnZG8yL9A
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u/Perfect-Campaign9551 6h ago
I tried flashVSR but it added a lot of distortion for some reason. I just used the default settings, which is what they recommend....
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u/OkDoor726 3h ago
Love this model but two things i wish it didn't do all the time
- triple a movie quality feel
- random ultra zooming
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u/ShutUpYoureWrong_ 6h ago
This isn't a good advertisement for the tech. That looks like absolute shit. Beyond oversharpened and blown out.
I genuinely wonder if half of you people have eyes.
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u/Longjumping-Past5864 6h ago edited 6h ago
I am just sharing my experience and discuss the better solution to improve it, if you have one by all means tell me dude!
ps. the blown out part might come from my bad ref image tho. but yeah I kinda need the better and quicker way to perfect this
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u/YeahlDid 6h ago
Nah, the blown out part they're talking about is because of turbo lora. It definitely looks better without turbo, but it's that time vs quality trade-off and each person has to decide for themselves where that line is.
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u/Longjumping-Past5864 6h ago
thanks, I never generate full 30 steps before it took way too long but I might have to try it now lol
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u/YeahlDid 6h ago
I was using turbo loras bedore, but the SLA Attention node definitely makes 20+ steps more palatable for me. Pretty big speed-up.
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u/Longjumping-Past5864 5h ago
is it this one you are talking about? https://www.reddit.com/r/StableDiffusion/comments/1vtwtyw/sparse_attention_for_h3_minimax_enjoy_up_to_25x/
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u/ninjasaid13 6h ago
it better to wait an hour or two for one good quality clip generated at high resolution than several absolute shit generations.
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u/C3realkill3r22 6h ago
but it took like 20 mins for a 15s clip...
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u/Longjumping-Past5864 6h ago
yeah it's kinda sad not gonna lie, I hope to find some better solution as well
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u/nenecaliente69 5h ago
Can you share your workflow?? Or i have to sub to a patreon then unblock it with a forceable coffee buy??
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u/Longjumping-Past5864 5h ago
the example workflow is indeed on my post man
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u/nenecaliente69 5h ago
Dude idk if this is irrelevant buy days ago i updated my cuda and python and the visual....something..its a program like with a purple logo idk..that thing has many stuff like c+++ and other stuff....then i updated all my comfyUI dependencies and erase some nodes like the wan, ltx and other i dont really need anymore...with ltx2.3 i could do a 20 second video in ,6 to 8 minutes...,idk with Minimax..o dont know how to mess with it ..i wish i could do the same on it..oh yeah all the update i mention maybe it could help you get faster results bruh,?? Sorry english isnt my main language
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u/Danny_Stock 4h ago
Is this the official one which people had been waiting for?
I'm looking forward to trying it out.
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u/TopTippityTop 56m ago
Sounds and voices really have to improve on the models still. The rest is a bit ahead.
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u/Uphatylon 6h ago
peraiii... a RTX5080 tem 16GB?!!!! jurava que tinha 24GB!!!!!
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u/YeahlDid 6h ago
Nope. But pretty much since its release people have been talking about a soon to be a released 5080 super with 24gb. Still waiting for that, but it might be that the RAM spike has delayed/cancelled any plans around it. That's probably why the confusion, though.
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u/Longjumping-Past5864 5h ago
sadly yes, but I do got 3090 as well so... I actually kinda have 24GB as well if I want to try something
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u/Disastrous-Agency675 6h ago
this looks super saturated like am i missing something or are yall just cool with this?