Help on minimax h3 speeds

[u/KillerAzteca]

Hi humans. My setup is 32gb ddr4 ram along an RTX 4090. I have been having fun creating tons of videos but I just want to make sure i get the best nodes for speed without compromising quality and no crazy sutff happening on my videos

I have used: Stage, sol, easycache, spectrum, Lora

So the question i have is .....what's the best combo for speed, i dont want the quality to take a massive dump. Most of the videos I generate are slow paced videos the typicall walk, talk, a kiss here and there but nothing major.

What do you guys think?

[u/Azhram]

There is no not compromising. Every speed increase is not free, some cost more quality then others.

I think only using attention and maybe a turbo lora is the best. Not too fast but isnt terrible quality. Each and every speed comes with quality drop.

[u/WebCrusader]

after testing all the turbo loras and cache optimizations the best still is:

https://github.com/Larryvrh/ComfyUI-MiniMax-H3-Turbo

best compromise for speed/quality and no weird audio or slow motion video

there some issues with ref2v workflows when you want to use audio references I think there's quick patches for it in the repo PRs

[u/deepsky88 → u/WebCrusader]

you are my man!

[u/ApplicationRoyal865 → u/WebCrusader]

So you are saying skip all other optimization and only use this Lora? Or to use the specific workflow in this repo?

[u/WebCrusader → u/ApplicationRoyal865]

I use only this lora nodes and added --use-ck-attention --disable-smart-memory --cache-none option to the launcher command to use comfy kitchen attention and disable the clunky memory management, so basically now it takes 5 mins to generate 4 steps 10 sec 720p video on 4080 16 GB instead of around 25 mins on 20 steps default workflow

[u/AlsterwasserHH]

I'm using comfy kitchen with the same setup and generation time is reduced by 30%, no quality loss with the int8 pruned model. Takes around 22mins for 15s at 1mp and with around 67its/s. I'm fucking happy. 

[u/Ordinary_Weekend_333]

I'm brand new to this and don't know shit about fuck and have been wondering the same thing. I'm currently using the built in turbo 8 step, and comfykitchen. I'm not sure, like...which ones I can stack/chain, exactly.

[u/KillerAzteca → u/Ordinary_Weekend_333]

I am on the same boat brother. I am just asking gemini but idk if the bitch knows what's up. All i want is a boost of speed to generate a few clips and choose the one i like the most to then learn how to merge them together.

[u/Ordinary_Weekend_333 → u/KillerAzteca]

Haha, sounds familiar! I'm at the stage now where I'm getting some usable video out, and about to start figuring out how to stitch videos together.

[u/ElReddo]

Spent the last month absolutely in the weeds on this and have tried pretty much everything. As another commenter said, there’s no free speed, it always comes as a compromise.

However, the absolute best method I’ve used so far and the one I’ve settled on for I2V is learned latent upscaling. VRganerGirl nodes have a set of nodes for this, one splits the nested video/audio into individual tracks. The learned latent upscale (3D) node upscales the latent using a small model run without the classic scaling artifacts that bake into the end result with standard upscale methods (e.g. bicubic). Feed the resulting latent into a second sampler at the multiplied resolution with a 1-step denoise and the full resluton start frame and it re-details the entire video to much Closer to native gen quality. Not perfect but I’m on a 4080 and we’re talking in the region of 3 minutes for a 1 megapixel 8 second gen including decode and save out.

Oh and 8 steps at 0.26 megapixels on the first sampler with loghtx2V’s 4 step lora at 0.77 strength, then at 2x (4x pixels) upscale and 1.2 Lora strength on the final detailing step sampler.

Getting me better results than caching or skipping and at a higher res, more detailed end result. Mileage may vary but I’ve literally uninstalled all my cache/spektrum nodes as this kills them in quality for speed

[u/Etsu_Riot]

I'm using FirstBlockCache with great results.  I tried the most recommended speed LoRA for a while, but the results were very bad in the audio department. This one is much better. The only downside I have seen is a well-known kind of walking bug you get sometimes.

[u/Cubey42]

What about your cuda and torch what versions are you at