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Fix code examples and improve clarity (#3)

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* Fix code examples and improve clarity

Fix one broken code example and improve clarity to all

* Update flux2_dev_hf.md

simplify more

* Update docs/flux2_dev_hf.md

* add ref to main readme
This commit is contained in:
apolinário
2025-11-25 23:42:47 +01:00
committed by GitHub
parent 99848ef562
commit dd0424d46a
2 changed files with 24 additions and 26 deletions
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README.md
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@@ -84,7 +84,7 @@ Additionally, we are recommending implementing a solution to mark the metadata o
## 🧨 Lower VRAM diffusers example
The below example should run on a RTX 4090.
The below example should run on a RTX 4090. For more examples check the [diffusers quantization guide here](docs/flux2_dev_hf.md)
```python
import torch

46
docs/flux2_dev_hf.md
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@@ -8,7 +8,7 @@ Install diffusers from `main`
pip install git+https://github.com/huggingface/diffusers.git
```
After accepting the gating on this repository, login with Hugging Face on your terminal
After accepting the gating on the [FLUX.2-dev repository](https://huggingface.co/black-forest-labs/FLUX.2-dev), login with Hugging Face on your terminal
```sh
hf auth login
```
@@ -28,13 +28,13 @@ The text-embeddings are calculated in bf16 in the cloud and you only load the tr
```py
import torch
from diffusers import Flux2Pipeline, Flux2Transformer2DModel
from diffusers import Flux2Pipeline
from diffusers.utils import load_image
from huggingface_hub import get_token
import requests
import io
repo_id = "diffusers/FLUX.2-dev-bnb-4bit"
repo_id = "diffusers/FLUX.2-dev-bnb-4bit" #quantized text-encoder and DiT. VAE still in bf16
device = "cuda:0"
torch_dtype = torch.bfloat16
@@ -52,14 +52,15 @@ def remote_text_encoder(prompts):
return prompt_embeds.to(device)
pipe = Flux2Pipeline.from_pretrained(
repo_id, transformer=transformer, text_encoder=None, torch_dtype=torch_dtype
repo_id, text_encoder=None, torch_dtype=torch_dtype
).to(device)
prompt = "Realistic macro photograph of a hermit crab using a soda can as its shell, partially emerging from the can, captured with sharp detail and natural colors, on a sunlit beach with soft shadows and a shallow depth of field, with blurred ocean waves in the background. The can has the text `BFL Diffusers` on it and it has a color gradient that start with #FF5733 at the top and transitions to #33FF57 at the bottom."
#cat_image = load_image("https://huggingface.co/spaces/zerogpu-aoti/FLUX.1-Kontext-Dev-fp8-dynamic/resolve/main/cat.png")
image = pipe(
prompt_embeds=remote_text_encoder(prompt),
#image=load_image("https://huggingface.co/spaces/zerogpu-aoti/FLUX.1-Kontext-Dev-fp8-dynamic/resolve/main/cat.png") #optional image input
#image=load_image(cat_image) #optional image input
generator=torch.Generator(device=device).manual_seed(42),
num_inference_steps=50, #28 steps can be a good trade-off
guidance_scale=4,
@@ -75,30 +76,23 @@ The text-encoder is offloaded from VRAM for the transformer to run with `pipe.en
```py
import torch
from transformers import Mistral3ForConditionalGeneration
from diffusers import Flux2Pipeline, Flux2Transformer2DModel
from diffusers import Flux2Pipeline
from diffusers.utils import load_image
repo_id = "diffusers/FLUX.2-dev-bnb-4bit"
repo_id = "diffusers/FLUX.2-dev-bnb-4bit" #quantized text-encoder and DiT. VAE still in bf16
device = "cuda:0"
torch_dtype = torch.bfloat16
transformer = Flux2Transformer2DModel.from_pretrained(
repo_id, subfolder="transformer", torch_dtype=torch_dtype, device_map="cpu"
)
text_encoder = Mistral3ForConditionalGeneration.from_pretrained(
repo_id, subfolder="text_encoder", dtype=torch_dtype, device_map="cpu"
)
pipe = Flux2Pipeline.from_pretrained(
repo_id, transformer=transformer, text_encoder=text_encoder, torch_dtype=torch_dtype
repo_id, torch_dtype=torch_dtype
)
pipe.enable_model_cpu_offload()
prompt = "Realistic macro photograph of a hermit crab using a soda can as its shell, partially emerging from the can, captured with sharp detail and natural colors, on a sunlit beach with soft shadows and a shallow depth of field, with blurred ocean waves in the background. The can has the text `BFL + Diffusers` on it and it has a color gradient that start with #FF5733 at the top and transitions to #33FF57 at the bottom."
#cat_image = load_image("https://huggingface.co/spaces/zerogpu-aoti/FLUX.1-Kontext-Dev-fp8-dynamic/resolve/main/cat.png")
image = pipe(
prompt=prompt,
#image=[load_image("https://huggingface.co/spaces/zerogpu-aoti/FLUX.1-Kontext-Dev-fp8-dynamic/resolve/main/cat.png")] #multi-image input
#image=[cat_image] #multi-image input
generator=torch.Generator(device=device).manual_seed(42),
num_inference_steps=50,
guidance_scale=4,
@@ -113,12 +107,13 @@ To understand how different quantizations affect the model's abilities and quali
## 💿 More VRAM (80G+)
Even an H100 can't hold the text-encoder, transormer and VAE at the same time. However, here it is a matter of activating the `pipe.enable_model_cpu_offload()`
And for H200, B200 or larger carts, everything fits.
Even an H100 can't hold the text-encoder, transormer and VAE at the same time. However, as they each fit individually, it is a matter of activating the `pipe.enable_model_cpu_offload()`
For H200, B200 or larger cards, everything fits.
```py
import torch
from diffusers import Flux2Pipeline
from diffusers.utils import load_image
repo_id = "black-forest-labs/FLUX.2-dev"
device = "cuda:0"
@@ -127,13 +122,14 @@ torch_dtype = torch.bfloat16
pipe = Flux2Pipeline.from_pretrained(
repo_id, torch_dtype=torch_dtype
)
pipe.enable_model_cpu_offload() #deactivate for >80G VRAM carts like H200, B200, etc. and do a `pipe.to(device)` instead
pipe.enable_model_cpu_offload() #no need to do cpu offload for >80G VRAM carts like H200, B200, etc. and do a `pipe.to(device)` instead
prompt = "Realistic macro photograph of a hermit crab using a soda can as its shell, partially emerging from the can, captured with sharp detail and natural colors, on a sunlit beach with soft shadows and a shallow depth of field, with blurred ocean waves in the background. The can has the text `BFL Diffusers` on it and it has a color gradient that start with #FF5733 at the top and transitions to #33FF57 at the bottom."
#cat_image = load_image("https://huggingface.co/spaces/zerogpu-aoti/FLUX.1-Kontext-Dev-fp8-dynamic/resolve/main/cat.png")
image = pipe(
prompt=prompt,
#image=[load_image("https://huggingface.co/spaces/zerogpu-aoti/FLUX.1-Kontext-Dev-fp8-dynamic/resolve/main/cat.png")] #multi-image input
#image=[cat_image] #multi-image input
generator=torch.Generator(device=device).manual_seed(42),
num_inference_steps=50,
guidance_scale=4,
@@ -146,7 +142,8 @@ image.save("flux2_output.png")
`pipe.enable_model_cpu_offload()` slows you down a bit. You can move as fast as possible on the H100 with the remote text-encoder
```py
import torch
from diffusers import Flux2Pipeline, Flux2Transformer2DModel
from diffusers import Flux2Pipeline
from diffusers.utils import load_image
from huggingface_hub import get_token
import requests
import io
@@ -175,9 +172,10 @@ pipe = Flux2Pipeline.from_pretrained(
prompt = "Realistic macro photograph of a hermit crab using a soda can as its shell, partially emerging from the can, captured with sharp detail and natural colors, on a sunlit beach with soft shadows and a shallow depth of field, with blurred ocean waves in the background. The can has the text `BFL + Diffusers` on it and it has a color gradient that start with #FF5733 at the top and transitions to #33FF57 at the bottom."
#cat_image = load_image("https://huggingface.co/spaces/zerogpu-aoti/FLUX.1-Kontext-Dev-fp8-dynamic/resolve/main/cat.png")
image = pipe(
prompt_embeds=remote_text_encoder(prompt),
#image=[load_image("https://huggingface.co/spaces/zerogpu-aoti/FLUX.1-Kontext-Dev-fp8-dynamic/resolve/main/cat.png")] #optional multi-image input
#image=[cat_image] #optional multi-image input
generator=torch.Generator(device=device).manual_seed(42),
num_inference_steps=50,
guidance_scale=4,