Load community pipelines and components

Community pipelines

Community pipelines are any DiffusionPipeline class that are different from the original paper implementation (for example, the StableDiffusionControlNetPipeline corresponds to the Text-to-Image Generation with ControlNet Conditioning paper). They provide additional functionality or extend the original implementation of a pipeline.

There are many cool community pipelines like Marigold Depth Estimation or InstantID, and you can find all the official community pipelines here.

There are two types of community pipelines, those stored on the Hugging Face Hub and those stored on Diffusers GitHub repository. Hub pipelines are completely customizable (scheduler, models, pipeline code, etc.) while Diffusers GitHub pipelines are only limited to custom pipeline code. Refer to this table for a more detailed comparison of Hub vs GitHub community pipelines.

from diffusers import DiffusionPipeline

pipeline = DiffusionPipeline.from_pretrained(
    "google/ddpm-cifar10-32", custom_pipeline="hf-internal-testing/diffusers-dummy-pipeline", use_safetensors=True
)

Load from a local file

Community pipelines can also be loaded from a local file if you pass a file path instead. The path to the passed directory must contain a pipeline.py file that contains the pipeline class.

pipeline = DiffusionPipeline.from_pretrained(
    "runwayml/stable-diffusion-v1-5",
    custom_pipeline="./path/to/pipeline_directory/",
    clip_model=clip_model,
    feature_extractor=feature_extractor,
    use_safetensors=True,
)

Load from a specific version

By default, community pipelines are loaded from the latest stable version of Diffusers. To load a community pipeline from another version, use the custom_revision parameter.

pipeline = DiffusionPipeline.from_pretrained(
    "runwayml/stable-diffusion-v1-5",
    custom_pipeline="clip_guided_stable_diffusion",
    custom_revision="main",
    clip_model=clip_model,
    feature_extractor=feature_extractor,
    use_safetensors=True,
)

Load with from_pipe

Community pipelines can also be loaded with the from_pipe() method which allows you to load and reuse multiple pipelines without any additional memory overhead (learn more in the Reuse a pipeline guide). The memory requirement is determined by the largest single pipeline loaded.

For example, let’s load a community pipeline that supports long prompts with weighting from a Stable Diffusion pipeline.

import torch
from diffusers import DiffusionPipeline

pipe_sd = DiffusionPipeline.from_pretrained("emilianJR/CyberRealistic_V3", torch_dtype=torch.float16)
pipe_sd.to("cuda")
# load long prompt weighting pipeline
pipe_lpw = DiffusionPipeline.from_pipe(
    pipe_sd,
    custom_pipeline="lpw_stable_diffusion",
).to("cuda")

prompt = "cat, hiding in the leaves, ((rain)), zazie rainyday, beautiful eyes, macro shot, colorful details, natural lighting, amazing composition, subsurface scattering, amazing textures, filmic, soft light, ultra-detailed eyes, intricate details, detailed texture, light source contrast, dramatic shadows, cinematic light, depth of field, film grain, noise, dark background, hyperrealistic dslr film still, dim volumetric cinematic lighting"
neg_prompt = "(deformed iris, deformed pupils, semi-realistic, cgi, 3d, render, sketch, cartoon, drawing, anime, mutated hands and fingers:1.4), (deformed, distorted, disfigured:1.3), poorly drawn, bad anatomy, wrong anatomy, extra limb, missing limb, floating limbs, disconnected limbs, mutation, mutated, ugly, disgusting, amputation"
generator = torch.Generator(device="cpu").manual_seed(20)
out_lpw = pipe_lpw(
    prompt, 
    negative_prompt=neg_prompt, 
    width=512,
    height=512,
    max_embeddings_multiples=3, 
    num_inference_steps=50,
    generator=generator,
    ).images[0]
out_lpw

Community components

Community components allow users to build pipelines that may have customized components that are not a part of Diffusers. If your pipeline has custom components that Diffusers doesn’t already support, you need to provide their implementations as Python modules. These customized components could be a VAE, UNet, and scheduler. In most cases, the text encoder is imported from the Transformers library. The pipeline code itself can also be customized.

This section shows how users should use community components to build a community pipeline.

You’ll use the showlab/show-1-base pipeline checkpoint as an example.

1. Import and load the text encoder from Transformers:

from transformers import T5Tokenizer, T5EncoderModel

pipe_id = "showlab/show-1-base"
tokenizer = T5Tokenizer.from_pretrained(pipe_id, subfolder="tokenizer")
text_encoder = T5EncoderModel.from_pretrained(pipe_id, subfolder="text_encoder")

2. Load a scheduler:

from diffusers import DPMSolverMultistepScheduler

scheduler = DPMSolverMultistepScheduler.from_pretrained(pipe_id, subfolder="scheduler")

3. Load an image processor:

from transformers import CLIPFeatureExtractor

feature_extractor = CLIPFeatureExtractor.from_pretrained(pipe_id, subfolder="feature_extractor")

4. Now you’ll load a custom UNet, which in this example, has already been implemented in showone_unet_3d_condition.py for your convenience. You’ll notice the UNet3DConditionModel class name is changed to ShowOneUNet3DConditionModel because UNet3DConditionModel already exists in Diffusers. Any components needed for the ShowOneUNet3DConditionModel class should be placed in showone_unet_3d_condition.py.

   Once this is done, you can initialize the UNet:

   Copied

   from showone_unet_3d_condition import ShowOneUNet3DConditionModel
   
   unet = ShowOneUNet3DConditionModel.from_pretrained(pipe_id, subfolder="unet")

5. Finally, you’ll load the custom pipeline code. For this example, it has already been created for you in pipeline_t2v_base_pixel.py. This script contains a custom TextToVideoIFPipeline class for generating videos from text. Just like the custom UNet, any code needed for the custom pipeline to work should go in pipeline_t2v_base_pixel.py.

Once everything is in place, you can initialize the TextToVideoIFPipeline with the ShowOneUNet3DConditionModel:

from pipeline_t2v_base_pixel import TextToVideoIFPipeline
import torch

pipeline = TextToVideoIFPipeline(
    unet=unet,
    text_encoder=text_encoder,
    tokenizer=tokenizer,
    scheduler=scheduler,
    feature_extractor=feature_extractor
)
pipeline = pipeline.to(device="cuda")
pipeline.torch_dtype = torch.float16

Push the pipeline to the Hub to share with the community!

pipeline.push_to_hub("custom-t2v-pipeline")

After the pipeline is successfully pushed, you need to make a few changes:

1. Change the _class_name attribute in model_index.json to "pipeline_t2v_base_pixel" and "TextToVideoIFPipeline".
2. Upload showone_unet_3d_condition.py to the unet subfolder.
3. Upload pipeline_t2v_base_pixel.py to the pipeline repository.

To run inference, add the trust_remote_code argument while initializing the pipeline to handle all the “magic” behind the scenes.

from diffusers import DiffusionPipeline
import torch

pipeline = DiffusionPipeline.from_pretrained(
    "<change-username>/<change-id>", trust_remote_code=True, torch_dtype=torch.float16
).to("cuda")

prompt = "hello"

# Text embeds
prompt_embeds, negative_embeds = pipeline.encode_prompt(prompt)

# Keyframes generation (8x64x40, 2fps)
video_frames = pipeline(
    prompt_embeds=prompt_embeds,
    negative_prompt_embeds=negative_embeds,
    num_frames=8,
    height=40,
    width=64,
    num_inference_steps=2,
    guidance_scale=9.0,
    output_type="pt"
).frames

As an additional reference, take a look at the repository structure of stabilityai/japanese-stable-diffusion-xl which also uses the trust_remote_code feature.

from diffusers import DiffusionPipeline
import torch

pipeline = DiffusionPipeline.from_pretrained(
    "stabilityai/japanese-stable-diffusion-xl", trust_remote_code=True
)
pipeline.to("cuda")