gradio_app.py

import os
import gradio as gr
import torch
from huggingface_hub import snapshot_download
from diffusers.utils import load_image, export_to_video
from diffusers import UNetSpatioTemporalConditionModel
from custom_diffusers.pipelines.pipeline_frame_interpolation_with_noise_injection import FrameInterpolationWithNoiseInjectionPipeline
from custom_diffusers.schedulers.scheduling_euler_discrete import EulerDiscreteScheduler
from attn_ctrl.attention_control import (AttentionStore, 
                                         register_temporal_self_attention_control, 
                                         register_temporal_self_attention_flip_control,
)
from torch.amp import autocast
import gc

# Set PYTORCH_CUDA_ALLOC_CONF
os.environ['PYTORCH_CUDA_ALLOC_CONF'] = 'expandable_segments:True'

# Set up device
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")

# Download checkpoint
snapshot_download(repo_id="fffiloni/svd_keyframe_interpolation", local_dir="checkpoints")
checkpoint_dir = "checkpoints/svd_reverse_motion_with_attnflip"

# Initialize pipeline
pretrained_model_name_or_path = "stabilityai/stable-video-diffusion-img2vid-xt"
noise_scheduler = EulerDiscreteScheduler.from_pretrained(pretrained_model_name_or_path, subfolder="scheduler")

pipe = FrameInterpolationWithNoiseInjectionPipeline.from_pretrained(
    pretrained_model_name_or_path, 
    scheduler=noise_scheduler,
    variant="fp16",
    torch_dtype=torch.float16, 
).to(device)
ref_unet = pipe.ori_unet

# Compute delta w
state_dict = pipe.unet.state_dict()
finetuned_unet = UNetSpatioTemporalConditionModel.from_pretrained(
    checkpoint_dir,
    subfolder="unet",
    torch_dtype=torch.float16,
).to(device)
assert finetuned_unet.config.num_frames == 14
ori_unet = UNetSpatioTemporalConditionModel.from_pretrained(
    "stabilityai/stable-video-diffusion-img2vid",
    subfolder="unet",
    variant='fp16',
    torch_dtype=torch.float16,
).to(device)

finetuned_state_dict = finetuned_unet.state_dict()
ori_state_dict = ori_unet.state_dict()
for name, param in finetuned_state_dict.items():
    if 'temporal_transformer_blocks.0.attn1.to_v' in name or "temporal_transformer_blocks.0.attn1.to_out.0" in name:
        delta_w = param - ori_state_dict[name]
        state_dict[name] = state_dict[name] + delta_w
pipe.unet.load_state_dict(state_dict)

controller_ref = AttentionStore()
register_temporal_self_attention_control(ref_unet, controller_ref)

controller = AttentionStore()
register_temporal_self_attention_flip_control(pipe.unet, controller, controller_ref)

# Custom CUDA memory management function
def cuda_memory_cleanup():
    torch.cuda.empty_cache()
    torch.cuda.ipc_collect()
    gc.collect()

def check_outputs_folder(folder_path):
    if os.path.exists(folder_path) and os.path.isdir(folder_path):
        for filename in os.listdir(folder_path):
            file_path = os.path.join(folder_path, filename)
            try:
                if os.path.isfile(file_path) or os.path.islink(file_path):
                    os.unlink(file_path)
                elif os.path.isdir(file_path):
                    shutil.rmtree(file_path)
            except Exception as e:
                print(f'Failed to delete {file_path}. Reason: {e}')
    else:
        print(f'The folder {folder_path} does not exist.')

@torch.no_grad()
def infer(frame1_path, frame2_path):
    seed = 42
    num_inference_steps = 5  # Reduced from 10
    noise_injection_steps = 0
    noise_injection_ratio = 0.5
    weighted_average = False

    generator = torch.Generator(device)
    if seed is not None:
        generator = generator.manual_seed(seed)

    frame1 = load_image(frame1_path)
    frame1 = frame1.resize((256, 144))  # Reduced from (512, 288)

    frame2 = load_image(frame2_path)
    frame2 = frame2.resize((256, 144))  # Reduced from (512, 288)

    # Clear CUDA cache
    cuda_memory_cleanup()

    try:
        with autocast():
            frames = pipe(
                image1=frame1, 
                image2=frame2, 
                num_inference_steps=num_inference_steps,
                generator=generator,
                weighted_average=weighted_average,
                noise_injection_steps=noise_injection_steps,
                noise_injection_ratio=noise_injection_ratio,
            ).frames[0]

        frames = [frame.cpu() for frame in frames]

        out_dir = "result"
        check_outputs_folder(out_dir)
        os.makedirs(out_dir, exist_ok=True)
        out_path = "result/video_result.gif"

        return "done"
    except RuntimeError as e:
        if "CUDA out of memory" in str(e):
            return "Error: CUDA out of memory. Try reducing the image size or using fewer inference steps."
        else:
            return f"An error occurred: {str(e)}"
    finally:
        cuda_memory_cleanup()

with gr.Blocks() as demo:
    with gr.Column():
        gr.Markdown("# Keyframe Interpolation with Stable Video Diffusion")
        with gr.Row():
            with gr.Column():
                image_input1 = gr.Image(type="filepath")
                image_input2 = gr.Image(type="filepath")
                submit_btn = gr.Button("Submit")
            with gr.Column():
                output = gr.Textbox()
    
    submit_btn.click(
        fn=infer, 
        inputs=[image_input1, image_input2],
        outputs=[output],
        show_api=False
    )

demo.queue(max_size=1).launch(show_api=False, show_error=True, share=True)