[GGUF] feat: support loading diffusers format gguf checkpoints.

[sayakpaul]

What does this PR do?

Refer to ngxson/diffusion-to-gguf#1 to know how to obtain the checkpoint.

After the checkpoint is obtained, run the following code for inference:

Expand

import torch
from diffusers import FluxPipeline, FluxTransformer2DModel, GGUFQuantizationConfig

ckpt_path = "model-Q4_0.gguf"
transformer = FluxTransformer2DModel.from_single_file(
    ckpt_path,
    quantization_config=GGUFQuantizationConfig(compute_dtype=torch.bfloat16),
    torch_dtype=torch.bfloat16,
    config="black-forest-labs/FLUX.1-dev",
    subfolder="transformer",
)
pipe = FluxPipeline.from_pretrained(
    "black-forest-labs/FLUX.1-dev",
    transformer=transformer,
    torch_dtype=torch.bfloat16,
).to("cuda")
prompt = "A cat holding a sign that says GGUF"
image = pipe(prompt, generator=torch.manual_seed(0)).images[0]
image.save("flux-gguf.png")

Currently, the entrypoint for the diffusers formatted GGUF checkpoint is through from_single_file(). It remains to be seen if after https://github.com/ngxson/flux-to-gguf, we wanna support them through from_pretrained().

Sample diffusers-format GGUF file: https://huggingface.co/sayakpaul/flux-diffusers-gguf

@DN6 please feel free to make any changes or even change the direction of the PR as you see fit.

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[nitinmukesh]

pip install git+https://github.com/huggingface/diffusers.git@refs/pull/11684/head

from typing import List
import torch
import PIL.Image
from diffusers import AutoencoderKLWan, WanVACEPipeline, WanVACETransformer3DModel
from diffusers.schedulers.scheduling_unipc_multistep import UniPCMultistepScheduler
from diffusers.utils import export_to_video, load_image, load_video
from diffusers import GGUFQuantizationConfig

model_id = "a-r-r-o-w/Wan-VACE-1.3B-diffusers"
transformer_path = f"https://huggingface.co/newgenai79/Wan-VACE-1.3B-diffusers-gguf/blob/main/Wan-VACE-1.3B-diffusers-Q8_0.gguf"
transformer_gguf = WanVACETransformer3DModel.from_single_file(
    transformer_path,
    quantization_config=GGUFQuantizationConfig(compute_dtype=torch.bfloat16),
    torch_dtype=torch.bfloat16,
    config=model_id,
    subfolder="transformer",
)
vae = AutoencoderKLWan.from_pretrained(model_id, subfolder="vae", torch_dtype=torch.float32)
pipe = WanVACEPipeline.from_pretrained(
    model_id,
    transformer=transformer_gguf,
    vae=vae, 
    torch_dtype=torch.bfloat16
)
flow_shift = 3.0  # 5.0 for 720P, 3.0 for 480P
pipe.scheduler = UniPCMultistepScheduler.from_config(pipe.scheduler.config, flow_shift=flow_shift)
pipe.enable_model_cpu_offload()
pipe.vae.enable_tiling()


prompt = "A sleek, humanoid robot stands in a vast warehouse filled with neatly stacked cardboard boxes on industrial shelves. The robot's metallic body gleams under the bright, even lighting, highlighting its futuristic design and intricate joints. A glowing blue light emanates from its chest, adding a touch of advanced technology. The background is dominated by rows of boxes, suggesting a highly organized storage system. The floor is lined with wooden pallets, enhancing the industrial setting. The camera remains static, capturing the robot's poised stance amidst the orderly environment, with a shallow depth of field that keeps the focus on the robot while subtly blurring the background for a cinematic effect."
negative_prompt = "Bright tones, overexposed, static, blurred details, subtitles, style, works, paintings, images, static, overall gray, worst quality, low quality, JPEG compression residue, ugly, incomplete, extra fingers, poorly drawn hands, poorly drawn faces, deformed, disfigured, misshapen limbs, fused fingers, still picture, messy background, three legs, many people in the background, walking backwards"

output = pipe(
    prompt=prompt,
    negative_prompt=negative_prompt,
    width=832,
    height=480,
    num_frames=81,
    num_inference_steps=30,
    guidance_scale=5.0,
    conditioning_scale=0.0,
    generator=torch.Generator().manual_seed(0),
).frames[0]
export_to_video(output, "output.mp4", fps=16)

(sddw-dev) C:\aiOWN\diffuser_webui>python WanVace_GGUF.py
W0610 22:13:36.639000 21016 site-packages\torch\distributed\elastic\multiprocessing\redirects.py:29] NOTE: Redirects are currently not supported in Windows or MacOs.
Traceback (most recent call last):
  File "C:\aiOWN\diffuser_webui\WanVace_GGUF.py", line 11, in <module>
    transformer_gguf = WanVACETransformer3DModel.from_single_file(
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\nitin\miniconda3\envs\sddw-dev\Lib\site-packages\huggingface_hub\utils\_validators.py", line 114, in _inner_fn
    return fn(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^
  File "C:\Users\nitin\miniconda3\envs\sddw-dev\Lib\site-packages\diffusers\loaders\single_file_model.py", line 235, in from_single_file
    raise ValueError(
ValueError: FromOriginalModelMixin is currently only compatible with StableCascadeUNet, UNet2DConditionModel, AutoencoderKL, ControlNetModel, SD3Transformer2DModel, MotionAdapter, SparseControlNetModel, FluxTransformer2DModel, LTXVideoTransformer3DModel, AutoencoderKLLTXVideo, AutoencoderDC, MochiTransformer3DModel, HunyuanVideoTransformer3DModel, AuraFlowTransformer2DModel, Lumina2Transformer2DModel, SanaTransformer2DModel, WanTransformer3DModel, AutoencoderKLWan, HiDreamImageTransformer2DModel