tutorials/video/wan/wan2_2

[giscus[bot]]

tutorials/video/wan/wan2_2

Official User Guide for WAN 2.2 Video Generation workflow example in ComfyUI
https://docs.comfy.org/tutorials/video/wan/wan2_2

[perobueno]

14B takes too long on a 3090. (5 minutes for 1 step) 5B gives an error on the VAE. Any solutions?

[NotDimon]

Almost 4 min for 1 step on 4090. I've changed resolution to 832x480 and number of frames to 73. Now it works like 10 times faster.

[ragtaf]

Using the default 5B TI2V workflow I'm getting some artifacts, particulary often with I2V (T2V is sometimes producing them, but are less noticeable). This artifacts appear like flickering giant pixels all over the generated video. I've only changed the aspect ratio to portrait and lowered framecount so I get quicker gens. Anyone knows if this may cause known trouble or if this issue is common across some configs? Thank you in advance.

[ragtaf]

Just tested with the standard workflow, default, prompt, seed, everything in place and artifacts still appear. Using RTX 4080 16 GB VRAM, 64 GB RAM, pytorch 2.7.1 + cuda 12.8. Also, using sage attention.

[SmithTalksTech]

On the 14B workflows I'm getting an error of:

Requested to load WAN21
0 models unloaded.
loaded partially 128.0 123.0943374633789 0
0%| | 0/10 [00:00<?, ?it/s]

Is this just me running out of VRAM? I have 16 GB

Also noticed on the image to video 14B workflow the Json is loading the FP8 models but the text says to download the FP16 models. I'm a noob so maybe I'm just misunderstanding what this is telling us.

[legarth]

This guide says to use the 2.1 VAE for 14B model... Is that a mistake?

[masterpj555]

supposedly not even in the screenshot it shows it.. im getting errors with 2.2 with that example if i change it.. im testing 2.1 now.. i think something isnt right in the vae of 2.2

[masterpj555]

works on vae 2.1 with that demo.. something is wrong on the 2.2 vae thats for sure

[masterpj555]

i found that the wan 2.1 vae is compatible with 2.2 and most likely a vae for 2.2 was never provided.. the ones you find is likely just a renamed 2.1 vae

[lclichen]

In fact, 2.1 VAE has a smaller compression ratio, while 16x compression of 2.2 VAE results in greater mass loss, so 2.2 VAE is only used for 5B models that require fewer resources.

[kibersektor]

When i tried the 14b i2v workflow using the fp8_e4m3fn_fast i get this error: Exception during fp8 op: CUDA error: CUBLAS_STATUS_NOT_SUPPORTED when calling cublasLtMatmulAlgoGetHeuristic( ltHandle, computeDesc.descriptor(), Adesc.descriptor(), Bdesc.descriptor(), Cdesc.descriptor(), Ddesc.descriptor(), preference.descriptor(), 1, &heuristicResult, &returnedResult)

Switching to fp8_e5m2 made it run however i'm not sure if this will make the results worse, I'm running it on a RTX 4090 and one step is taking roughly 2.3minutes

[masterpj555]

switch to studio drivers on your 4090

[dsphotoblog]

is there any reason that the secon samples is on fixed value?

[Gunter59]

Ich erhalte beim Workflow folgende Fehlermeldung: KSamplerAdvanced
Given groups=1, weight of size [5120, 36, 1, 2, 2], expected input[1, 32, 31, 90, 160] to have 36 channels, but got 32 channels instead. Alle Modelle wurden neu geladen.

[zg-alexey]

Update to latest nightly ComfyUI, it'll fix the issue.

[franklydegenerate]

The workflows are coming out for me as just an image, not a video. Not sure what's going on.

[franklydegenerate]

edit: Looks like it just appeared that way in the preview. It did make a 5 second long video with my rtx 5090, but goodness it took a while. I'm sure we'll get some speed ups that will make it even better! Thanks for your hard work putting together support on launch day, Comfy. :)

[dsphotoblog]

definetly needs lora speedup

[masterpj555]

what do you use to speed up things with lora?

[mikheys]

Error: Given groups=1, weight of size [5120, 36, 1, 2, 2], expected input[1, 32, 31, 160, 90] to have 36 channels, but got 32 channels instead

[zg-alexey]

Update to latest nightly ComfyUI, it'll fix the issue.

[weyn9q]

5b model i2v 960x1280 (!) resolution takes just 3:07 with 20 steps. really fast. it is base fp16. so fp8 should be less then 2min and fp4 just around 1min or even less. with lower resolution ofc faster. i tried lower resolution it takes less then 2min. but quality much worst

[hugalafutro]

the negative prompt in the 5b workflow is in chinese, does it matter? running it through deepl gave me

"Vibrant colors, overexposed, static, blurry details, subtitles, style, artwork, painting, scene, static, overall grayish, poor quality, low quality, JPEG compression artifacts, ugly, incomplete, extra fingers, poorly drawn hands, poorly drawn faces, deformed, disfigured, deformed limbs, fused fingers, static scene, cluttered background, three legs, many people in the background, walking backward"

is that what they're supposed to be? or should i leave them in chinese? what about if i want to add more, does the language matter?

[comfyui-wiki]

It's okay. This model works with both Chinese and English

[masterpj555]

Very cool but on the "Wan2.2 14B T2V Text-to-Video Workflow Example" i got a stall with a 4090, 64gb ram, 9950x3d .. Shortening the length gave me an error supposedly caused by EmptyHunyuanLatentVideo.

I lowered the resolution in the hopes it would work but keep getting
"Given groups=1, weight of size [48, 48, 1, 1, 1], expected input[1, 16, 9, 76, 100] to have 48 channels, but got 16 channels instead"

AI told me that there should be a "EmptyWAN2LatentVideo "
But i dont think there is such a thing.

[masterpj555]

Do note: I changed my vae to the 2.2.. i think in there lies the issue.. something aint right with that workflow.. Poster should explain.. perhaps its a work in progress ?

[masterpj555]

works on vae 2.1 with that demo.. something is wrong on the 2.2 vae thats for sure

[mayankagrawal10198]

Can I use wan2.2 with same Causvid Lora ?

[homewmt]

Can I run with multiple GPUs?

[zhutou748]

这个要怎样解决

[comfyui-wiki]

Currently, ComfyUI's multi-GPU support hasn't been merged yet. If you want to try multi-GPU, you can try this PR

[zhutou748]

模块"tensorflow"没有属性"tensor"

[comfyui-wiki]

你更新 ComfyUI 了吗？

[parthwagh9999]

Please share text to image workflow

[comfyui-wiki]

Haha, gonna update the templates today. I'm testing them.

[Gunter59]

Danke, nachdem Update funktioniert es. Parth Wagh ***@***.***> schrieb am Di., 29. Juli 2025, 07:55:

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[mohitsoni48]

I tried to run Wan2.2 TI2V 5B Hybrid Version Workflow Example on my Macbook M2 pro 32GB Ram, It resulted in a messy pixelated video. Changed the scheduler to Euler Normal, got the best result there but still it was just a chaostic pixelated video. Tried both T2V and I2V

[KannManMachen]

I tried the default "Wan 2.2 14B Image to Video" template (with fp8 model versions). Didn't change anything:

My 4090 took = 80 minutes ... oufff :/