app.py

import datetime
import os
import sys
import uuid
import warnings

import cv2
import gradio as gr
import numpy as np
import spaces
import torch
import torchvision
from huggingface_hub import snapshot_download
from PIL import Image
from scipy.interpolate import PchipInterpolator

sys.path.insert(0, os.getcwd())

from gradio_demo.utils_drag import *
from models_diffusers.controlnet_svd import ControlNetSVDModel
from models_diffusers.unet_spatio_temporal_condition import UNetSpatioTemporalConditionModel
from pipelines.pipeline_stable_video_diffusion_interp_control import StableVideoDiffusionInterpControlPipeline

print("gr file", gr.__file__)


os.makedirs("checkpoints", exist_ok=True)

snapshot_download(
    "wwen1997/framer_512x320",
    local_dir="checkpoints/framer_512x320",
)

snapshot_download(
    "stabilityai/stable-video-diffusion-img2vid-xt",
    local_dir="checkpoints/stable-video-diffusion-img2vid-xt",
)


model_id = "checkpoints/framer_512x320"
device = "cuda"
dtype = torch.float16

OUTPUT_DIR = "gradio_demo/outputs"
HEIGHT = 320
WIDTH = 512
MODEL_LENGTH = 14
USE_SIFT = False


unet = UNetSpatioTemporalConditionModel.from_pretrained(
    os.path.join(model_id, "unet"),
    torch_dtype=torch.float16,
    low_cpu_mem_usage=True,
    custom_resume=True,
)
unet = unet.to(device, dtype)

controlnet = ControlNetSVDModel.from_pretrained(
    os.path.join(model_id, "controlnet"),
)
controlnet = controlnet.to(device, dtype)

pipe = StableVideoDiffusionInterpControlPipeline.from_pretrained(
    "checkpoints/stable-video-diffusion-img2vid-xt",
    unet=unet,
    controlnet=controlnet,
    low_cpu_mem_usage=False,
    torch_dtype=torch.float16,
    variant="fp16",
    local_files_only=True,
)
pipe.to(device)


def interpolate_trajectory(points, n_points):
    x = [point[0] for point in points]
    y = [point[1] for point in points]

    t = np.linspace(0, 1, len(points))

    # fx = interp1d(t, x, kind='cubic')
    # fy = interp1d(t, y, kind='cubic')
    fx = PchipInterpolator(t, x)
    fy = PchipInterpolator(t, y)

    new_t = np.linspace(0, 1, n_points)

    new_x = fx(new_t)
    new_y = fy(new_t)
    new_points = list(zip(new_x, new_y))

    return new_points


def gen_gaussian_heatmap(imgSize=200):
    circle_img = np.zeros((imgSize, imgSize), np.float32)
    circle_mask = cv2.circle(circle_img, (imgSize // 2, imgSize // 2), imgSize // 2, 1, -1)

    isotropicGrayscaleImage = np.zeros((imgSize, imgSize), np.float32)

    for i in range(imgSize):
        for j in range(imgSize):
            isotropicGrayscaleImage[i, j] = (
                1
                / 2
                / np.pi
                / (40**2)
                * np.exp(-1 / 2 * ((i - imgSize / 2) ** 2 / (40**2) + (j - imgSize / 2) ** 2 / (40**2)))
            )

    isotropicGrayscaleImage = isotropicGrayscaleImage * circle_mask
    isotropicGrayscaleImage = (isotropicGrayscaleImage / np.max(isotropicGrayscaleImage)).astype(np.float32)
    isotropicGrayscaleImage = (isotropicGrayscaleImage / np.max(isotropicGrayscaleImage) * 255).astype(np.uint8)

    return isotropicGrayscaleImage


def get_vis_image(
    target_size=(512, 512),
    points=None,
    side=20,
    num_frames=14,
    # original_size=(512 , 512), args="", first_frame=None, is_mask = False, model_id=None,
):

    # images = []
    vis_images = []
    heatmap = gen_gaussian_heatmap()

    trajectory_list = []
    radius_list = []

    for index, point in enumerate(points):
        trajectories = [[int(i[0]), int(i[1])] for i in point]
        trajectory_list.append(trajectories)

        radius = 20
        radius_list.append(radius)

    if len(trajectory_list) == 0:
        vis_images = [Image.fromarray(np.zeros(target_size, np.uint8)) for _ in range(num_frames)]
        return vis_images

    for idxx, point in enumerate(trajectory_list[0]):
        new_img = np.zeros(target_size, np.uint8)
        vis_img = new_img.copy()
        # ids_embedding = torch.zeros((target_size[0], target_size[1], 320))

        if idxx >= num_frames:
            break

        # for cc, (mask, trajectory, radius) in enumerate(zip(mask_list, trajectory_list, radius_list)):
        for cc, (trajectory, radius) in enumerate(zip(trajectory_list, radius_list)):

            center_coordinate = trajectory[idxx]
            trajectory_ = trajectory[:idxx]
            side = min(radius, 50)

            y1 = max(center_coordinate[1] - side, 0)
            y2 = min(center_coordinate[1] + side, target_size[0] - 1)
            x1 = max(center_coordinate[0] - side, 0)
            x2 = min(center_coordinate[0] + side, target_size[1] - 1)

            if x2 - x1 > 3 and y2 - y1 > 3:
                need_map = cv2.resize(heatmap, (x2 - x1, y2 - y1))
                new_img[y1:y2, x1:x2] = need_map.copy()

                if cc >= 0:
                    vis_img[y1:y2, x1:x2] = need_map.copy()
                    if len(trajectory_) == 1:
                        vis_img[trajectory_[0][1], trajectory_[0][0]] = 255
                    else:
                        for itt in range(len(trajectory_) - 1):
                            cv2.line(
                                vis_img,
                                (trajectory_[itt][0], trajectory_[itt][1]),
                                (trajectory_[itt + 1][0], trajectory_[itt + 1][1]),
                                (255, 255, 255),
                                3,
                            )

        img = new_img

        # Ensure all images are in RGB format
        if len(img.shape) == 2:  # Grayscale image
            img = cv2.cvtColor(img, cv2.COLOR_GRAY2RGB)
            vis_img = cv2.cvtColor(vis_img, cv2.COLOR_GRAY2RGB)
        elif len(img.shape) == 3 and img.shape[2] == 3:  # Color image in BGR format
            img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
            vis_img = cv2.cvtColor(vis_img, cv2.COLOR_BGR2RGB)

        # Convert the numpy array to a PIL image
        # pil_img = Image.fromarray(img)
        # images.append(pil_img)
        vis_images.append(Image.fromarray(vis_img))

    return vis_images


def frames_to_video(frames_folder, output_video_path, fps=7):
    frame_files = os.listdir(frames_folder)
    # sort the frame files by their names
    frame_files = sorted(frame_files, key=lambda x: int(x.split(".")[0]))

    video = []
    for frame_file in frame_files:
        frame_path = os.path.join(frames_folder, frame_file)
        frame = torchvision.io.read_image(frame_path)
        video.append(frame)

    video = torch.stack(video)
    video = rearrange(video, "T C H W -> T H W C")
    torchvision.io.write_video(output_video_path, video, fps=fps)


def save_gifs_side_by_side(
    batch_output,
    validation_control_images,
    output_folder,
    target_size=(512, 512),
    duration=200,
    point_tracks=None,
):
    flattened_batch_output = batch_output

    def create_gif(image_list, gif_path, duration=100):
        pil_images = [validate_and_convert_image(img, target_size=target_size) for img in image_list]
        pil_images = [img for img in pil_images if img is not None]
        if pil_images:
            pil_images[0].save(gif_path, save_all=True, append_images=pil_images[1:], loop=0, duration=duration)

        # also save all the pil_images
        tmp_folder = gif_path.replace(".gif", "")
        print(tmp_folder)
        ensure_dirname(tmp_folder)
        tmp_frame_list = []
        for idx, pil_image in enumerate(pil_images):
            tmp_frame_path = os.path.join(tmp_folder, f"{idx}.png")
            pil_image.save(tmp_frame_path)
            tmp_frame_list.append(tmp_frame_path)

        # also save as mp4
        output_video_path = gif_path.replace(".gif", ".mp4")
        frames_to_video(tmp_folder, output_video_path, fps=7)

    # Creating GIFs for each image list
    timestamp = datetime.datetime.now().strftime("%Y%m%d-%H%M%S")
    gif_paths = []

    for idx, image_list in enumerate([validation_control_images, flattened_batch_output]):

        gif_path = os.path.join(output_folder.replace("vis_gif.gif", ""), f"temp_{idx}_{timestamp}.gif")
        create_gif(image_list, gif_path)
        gif_paths.append(gif_path)

        # also save the point_tracks
        assert point_tracks is not None
        point_tracks_path = gif_path.replace(".gif", ".npy")
        np.save(point_tracks_path, point_tracks.cpu().numpy())

    # Function to combine GIFs side by side
    def combine_gifs_side_by_side(gif_paths, output_path):
        print(gif_paths)
        gifs = [Image.open(gif) for gif in gif_paths]

        # Assuming all gifs have the same frame count and duration
        frames = []
        for frame_idx in range(gifs[-1].n_frames):
            combined_frame = None
            for gif in gifs:
                if frame_idx >= gif.n_frames:
                    gif.seek(gif.n_frames - 1)
                else:
                    gif.seek(frame_idx)
                if combined_frame is None:
                    combined_frame = gif.copy()
                else:
                    combined_frame = get_concat_h(combined_frame, gif.copy(), gap=10)
            frames.append(combined_frame)

        if output_path.endswith(".mp4"):
            video = [torchvision.transforms.functional.pil_to_tensor(frame) for frame in frames]
            video = torch.stack(video)
            video = rearrange(video, "T C H W -> T H W C")
            torchvision.io.write_video(output_path, video, fps=7)
            print(f"Saved video to {output_path}")
        else:
            frames[0].save(output_path, save_all=True, append_images=frames[1:], loop=0, duration=duration)

    # Helper function to concatenate images horizontally
    def get_concat_h(im1, im2, gap=10):
        # # img first, heatmap second
        # im1, im2 = im2, im1

        dst = Image.new("RGB", (im1.width + im2.width + gap, max(im1.height, im2.height)), (255, 255, 255))
        dst.paste(im1, (0, 0))
        dst.paste(im2, (im1.width + gap, 0))
        return dst

    # Helper function to concatenate images vertically
    def get_concat_v(im1, im2):
        dst = Image.new("RGB", (max(im1.width, im2.width), im1.height + im2.height))
        dst.paste(im1, (0, 0))
        dst.paste(im2, (0, im1.height))
        return dst

    # Combine the GIFs into a single file
    combined_gif_path = output_folder
    combine_gifs_side_by_side(gif_paths, combined_gif_path)

    combined_gif_path_v = gif_path.replace(".gif", "_v.mp4")
    ensure_dirname(combined_gif_path_v.replace(".mp4", ""))
    combine_gifs_side_by_side(gif_paths, combined_gif_path_v)

    # # Clean up temporary GIFs
    # for gif_path in gif_paths:
    #     os.remove(gif_path)

    return combined_gif_path


# Define functions
def validate_and_convert_image(image, target_size=(512, 512)):
    if image is None:
        print("Encountered a None image")
        return None

    if isinstance(image, torch.Tensor):
        # Convert PyTorch tensor to PIL Image
        if image.ndim == 3 and image.shape[0] in [1, 3]:  # Check for CxHxW format
            if image.shape[0] == 1:  # Convert single-channel grayscale to RGB
                image = image.repeat(3, 1, 1)
            image = image.mul(255).clamp(0, 255).byte().permute(1, 2, 0).cpu().numpy()
            image = Image.fromarray(image)
        else:
            print(f"Invalid image tensor shape: {image.shape}")
            return None
    elif isinstance(image, Image.Image):
        # Resize PIL Image
        image = image.resize(target_size)
    else:
        print("Image is not a PIL Image or a PyTorch tensor")
        return None

    return image


def reset_states(first_frame_path, last_frame_path, tracking_points):
    first_frame_path = None
    last_frame_path = None
    tracking_points = []
    return first_frame_path, last_frame_path, tracking_points


def preprocess_image(image):

    image_pil = image2pil(image.name)

    raw_w, raw_h = image_pil.size
    # resize_ratio = max(512 / raw_w, 320 / raw_h)
    # image_pil = image_pil.resize((int(raw_w * resize_ratio), int(raw_h * resize_ratio)), Image.BILINEAR)
    # image_pil = transforms.CenterCrop((320, 512))(image_pil.convert('RGB'))
    image_pil = image_pil.resize((512, 320), Image.BILINEAR)

    first_frame_path = os.path.join(OUTPUT_DIR, f"first_frame_{str(uuid.uuid4())[:4]}.png")

    image_pil.save(first_frame_path)

    return first_frame_path, first_frame_path, []


def preprocess_image_end(image_end):

    image_end_pil = image2pil(image_end.name)

    raw_w, raw_h = image_end_pil.size
    # resize_ratio = max(512 / raw_w, 320 / raw_h)
    # image_end_pil = image_end_pil.resize((int(raw_w * resize_ratio), int(raw_h * resize_ratio)), Image.BILINEAR)
    # image_end_pil = transforms.CenterCrop((320, 512))(image_end_pil.convert('RGB'))
    image_end_pil = image_end_pil.resize((512, 320), Image.BILINEAR)

    last_frame_path = os.path.join(OUTPUT_DIR, f"last_frame_{str(uuid.uuid4())[:4]}.png")

    image_end_pil.save(last_frame_path)

    return last_frame_path, last_frame_path, []


def add_drag(tracking_points):
    if not tracking_points or tracking_points[-1]:
        tracking_points.append([])
    return tracking_points


def delete_last_drag(tracking_points, first_frame_path, last_frame_path):
    if tracking_points:
        tracking_points.pop()
    transparent_background = Image.open(first_frame_path).convert("RGBA")
    transparent_background_end = Image.open(last_frame_path).convert("RGBA")
    w, h = transparent_background.size
    transparent_layer = np.zeros((h, w, 4))

    for track in tracking_points:
        if len(track) > 1:
            for i in range(len(track) - 1):
                start_point = track[i]
                end_point = track[i + 1]
                vx = end_point[0] - start_point[0]
                vy = end_point[1] - start_point[1]
                arrow_length = np.sqrt(vx**2 + vy**2)
                if i == len(track) - 2:
                    cv2.arrowedLine(
                        transparent_layer,
                        tuple(start_point),
                        tuple(end_point),
                        (255, 0, 0, 255),
                        2,
                        tipLength=8 / arrow_length,
                    )
                else:
                    cv2.line(
                        transparent_layer,
                        tuple(start_point),
                        tuple(end_point),
                        (255, 0, 0, 255),
                        2,
                    )
        else:
            cv2.circle(transparent_layer, tuple(track[0]), 5, (255, 0, 0, 255), -1)

    transparent_layer = Image.fromarray(transparent_layer.astype(np.uint8))
    trajectory_map = Image.alpha_composite(transparent_background, transparent_layer)
    trajectory_map_end = Image.alpha_composite(transparent_background_end, transparent_layer)

    return tracking_points, trajectory_map, trajectory_map_end


def delete_last_step(tracking_points, first_frame_path, last_frame_path):
    if tracking_points and tracking_points[-1]:
        tracking_points[-1].pop()
    transparent_background = Image.open(first_frame_path).convert("RGBA")
    transparent_background_end = Image.open(last_frame_path).convert("RGBA")
    w, h = transparent_background.size
    transparent_layer = np.zeros((h, w, 4))

    for track in tracking_points:
        if not track:
            continue
        if len(track) > 1:
            for i in range(len(track) - 1):
                start_point = track[i]
                end_point = track[i + 1]
                vx = end_point[0] - start_point[0]
                vy = end_point[1] - start_point[1]
                arrow_length = np.sqrt(vx**2 + vy**2)
                if i == len(track) - 2:
                    cv2.arrowedLine(
                        transparent_layer,
                        tuple(start_point),
                        tuple(end_point),
                        (255, 0, 0, 255),
                        2,
                        tipLength=8 / arrow_length,
                    )
                else:
                    cv2.line(
                        transparent_layer,
                        tuple(start_point),
                        tuple(end_point),
                        (255, 0, 0, 255),
                        2,
                    )
        else:
            cv2.circle(transparent_layer, tuple(track[0]), 5, (255, 0, 0, 255), -1)

    transparent_layer = Image.fromarray(transparent_layer.astype(np.uint8))
    trajectory_map = Image.alpha_composite(transparent_background, transparent_layer)
    trajectory_map_end = Image.alpha_composite(transparent_background_end, transparent_layer)

    return tracking_points, trajectory_map, trajectory_map_end


def add_tracking_points(
    tracking_points, first_frame_path, last_frame_path, evt: gr.SelectData
):  # SelectData is a subclass of EventData
    print(f"You selected {evt.value} at {evt.index} from {evt.target}")
    if not tracking_points:
        tracking_points = [[]]
    tracking_points[-1].append(evt.index)

    transparent_background = Image.open(first_frame_path).convert("RGBA")
    transparent_background_end = Image.open(last_frame_path).convert("RGBA")

    w, h = transparent_background.size
    transparent_layer = 0
    for idx, track in enumerate(tracking_points):
        # mask = cv2.imread(
        #     os.path.join(OUTPUT_DIR, f"mask_{idx+1}.jpg")
        # )
        mask = np.zeros((320, 512, 3))
        color = color_list[idx + 1]
        transparent_layer = mask[:, :, 0].reshape(h, w, 1) * color.reshape(1, 1, -1) + transparent_layer

        if len(track) > 1:
            for i in range(len(track) - 1):
                start_point = track[i]
                end_point = track[i + 1]
                vx = end_point[0] - start_point[0]
                vy = end_point[1] - start_point[1]
                arrow_length = np.sqrt(vx**2 + vy**2)
                if i == len(track) - 2:
                    cv2.arrowedLine(
                        transparent_layer,
                        tuple(start_point),
                        tuple(end_point),
                        (255, 0, 0, 255),
                        2,
                        tipLength=8 / arrow_length,
                    )
                else:
                    cv2.line(
                        transparent_layer,
                        tuple(start_point),
                        tuple(end_point),
                        (255, 0, 0, 255),
                        2,
                    )
        else:
            cv2.circle(transparent_layer, tuple(track[0]), 5, (255, 0, 0, 255), -1)

    transparent_layer = Image.fromarray(transparent_layer.astype(np.uint8))
    alpha_coef = 0.99
    im2_data = transparent_layer.getdata()
    new_im2_data = [(r, g, b, int(a * alpha_coef)) for r, g, b, a in im2_data]
    transparent_layer.putdata(new_im2_data)

    trajectory_map = Image.alpha_composite(transparent_background, transparent_layer)
    trajectory_map_end = Image.alpha_composite(transparent_background_end, transparent_layer)

    return tracking_points, trajectory_map, trajectory_map_end


@spaces.GPU
def run(first_frame_path, last_frame_path, tracking_points, controlnet_cond_scale, motion_bucket_id):
    original_width, original_height = 512, 320  # TODO

    # load_image
    image = Image.open(first_frame_path).convert("RGB")
    width, height = image.size
    image = image.resize((WIDTH, HEIGHT))

    image_end = Image.open(last_frame_path).convert("RGB")
    image_end = image_end.resize((WIDTH, HEIGHT))

    input_all_points = tracking_points

    sift_track_update = False
    anchor_points_flag = None

    if (len(input_all_points) == 0) and USE_SIFT:
        sift_track_update = True
        controlnet_cond_scale = 0.5

        from models_diffusers.sift_match import interpolate_trajectory as sift_interpolate_trajectory
        from models_diffusers.sift_match import sift_match

        output_file_sift = os.path.join(OUTPUT_DIR, "sift.png")

        # (f, topk, 2), f=2 (before interpolation)
        pred_tracks = sift_match(
            image,
            image_end,
            thr=0.5,
            topk=5,
            method="random",
            output_path=output_file_sift,
        )

        if pred_tracks is not None:
            # interpolate the tracks, following draganything gradio demo
            pred_tracks = sift_interpolate_trajectory(pred_tracks, num_frames=MODEL_LENGTH)

            anchor_points_flag = torch.zeros((MODEL_LENGTH, pred_tracks.shape[1])).to(pred_tracks.device)
            anchor_points_flag[0] = 1
            anchor_points_flag[-1] = 1

            pred_tracks = pred_tracks.permute(1, 0, 2)  # (num_points, num_frames, 2)

    else:

        resized_all_points = [
            tuple([tuple([int(e1[0] * WIDTH / original_width), int(e1[1] * HEIGHT / original_height)]) for e1 in e])
            for e in input_all_points
        ]

        # a list of num_tracks tuples, each tuple contains a track with several points, represented as (x, y)
        # in image w & h scale

        for idx, splited_track in enumerate(resized_all_points):
            if len(splited_track) == 0:
                warnings.warn("running without point trajectory control")
                continue

            if len(splited_track) == 1:  # stationary point
                displacement_point = tuple([splited_track[0][0] + 1, splited_track[0][1] + 1])
                splited_track = tuple([splited_track[0], displacement_point])
            # interpolate the track
            splited_track = interpolate_trajectory(splited_track, MODEL_LENGTH)
            splited_track = splited_track[:MODEL_LENGTH]
            resized_all_points[idx] = splited_track

        pred_tracks = torch.tensor(resized_all_points)  # (num_points, num_frames, 2)

    vis_images = get_vis_image(
        target_size=(HEIGHT, WIDTH),
        points=pred_tracks,
        num_frames=MODEL_LENGTH,
    )

    if len(pred_tracks.shape) != 3:
        print("pred_tracks.shape", pred_tracks.shape)
        with_control = False
        controlnet_cond_scale = 0.0
    else:
        with_control = True
        pred_tracks = pred_tracks.permute(1, 0, 2).to(device, dtype)  # (num_frames, num_points, 2)

    point_embedding = None
    video_frames = pipe(
        image,
        image_end,
        # trajectory control
        with_control=with_control,
        point_tracks=pred_tracks,
        point_embedding=point_embedding,
        with_id_feature=False,
        controlnet_cond_scale=controlnet_cond_scale,
        # others
        num_frames=14,
        width=width,
        height=height,
        # decode_chunk_size=8,
        # generator=generator,
        motion_bucket_id=motion_bucket_id,
        fps=7,
        num_inference_steps=30,
        # track
        sift_track_update=sift_track_update,
        anchor_points_flag=anchor_points_flag,
    ).frames[0]

    vis_images = [cv2.applyColorMap(np.array(img).astype(np.uint8), cv2.COLORMAP_JET) for img in vis_images]
    vis_images = [cv2.cvtColor(np.array(img).astype(np.uint8), cv2.COLOR_BGR2RGB) for img in vis_images]
    vis_images = [Image.fromarray(img) for img in vis_images]

    # video_frames = [img for sublist in video_frames for img in sublist]
    val_save_dir = os.path.join(OUTPUT_DIR, "vis_gif.gif")
    save_gifs_side_by_side(
        video_frames,
        vis_images[:MODEL_LENGTH],
        val_save_dir,
        target_size=(WIDTH, HEIGHT),
        duration=110,
        point_tracks=pred_tracks,
    )

    return val_save_dir


if __name__ == "__main__":

    ensure_dirname(OUTPUT_DIR)

    color_list = []
    for i in range(20):
        color = np.concatenate([np.random.random(4) * 255], axis=0)
        color_list.append(color)

    with gr.Blocks() as demo:
        gr.Markdown("""<h1 align="center">Framer: Interactive Frame Interpolation</h1><br>""")

        gr.Markdown(
            """Gradio Demo for <a href='https://arxiv.org/abs/2410.18978'><b>Framer: Interactive Frame Interpolation</b></a>.<br>
                    Github Repo can be found at https://github.com/aim-uofa/Framer<br>
                    The template is inspired by DragAnything."""
        )

        gr.Image(label="Framer: Interactive Frame Interpolation", value="assets/demos.gif", height=432, width=768)

        gr.Markdown(
            """## Usage: <br>
                    1. Upload images<br>
                    &ensp;  1.1  Upload the start image via the "Upload Start Image" button.<br>
                    &ensp;  1.2. Upload the end image via the "Upload End Image" button.<br>
                    2. (Optional) Draw some drags.<br>
                    &ensp;  2.1. Click "Add Drag Trajectory" to add the motion trajectory.<br>
                    &ensp;  2.2. You can click several points on either start or end image to forms a path.<br>
                    &ensp;  2.3. Click "Delete last drag" to delete the whole lastest path.<br>
                    &ensp;  2.4. Click "Delete last step" to delete the lastest clicked control point.<br>
                    3. Interpolate the images (according the path) with a click on "Run" button. <br>"""
        )

        first_frame_path = gr.State()
        last_frame_path = gr.State()
        tracking_points = gr.State([])

        with gr.Row():
            with gr.Column(scale=1):
                image_upload_button = gr.UploadButton(label="Upload Start Image", file_types=["image"])
                image_end_upload_button = gr.UploadButton(label="Upload End Image", file_types=["image"])
                # select_area_button = gr.Button(value="Select Area with SAM")
                add_drag_button = gr.Button(value="Add New Drag Trajectory")
                reset_button = gr.Button(value="Reset")
                run_button = gr.Button(value="Run")
                delete_last_drag_button = gr.Button(value="Delete last drag")
                delete_last_step_button = gr.Button(value="Delete last step")

            with gr.Column(scale=7):
                with gr.Row():
                    with gr.Column(scale=6):
                        input_image = gr.Image(
                            label="start frame",
                            interactive=True,
                            height=320,
                            width=512,
                            sources=[],
                        )

                    with gr.Column(scale=6):
                        input_image_end = gr.Image(
                            label="end frame",
                            interactive=True,
                            height=320,
                            width=512,
                            sources=[],
                        )

        with gr.Row():
            with gr.Column(scale=1):

                controlnet_cond_scale = gr.Slider(
                    label="Control Scale",
                    minimum=0.0,
                    maximum=10,
                    step=0.1,
                    value=1.0,
                )

                motion_bucket_id = gr.Slider(
                    label="Motion Bucket",
                    minimum=1,
                    maximum=180,
                    step=1,
                    value=100,
                )

            with gr.Column(scale=5):
                output_video = gr.Image(
                    label="Output Video",
                    height=320,
                    width=1152,
                )

        with gr.Row():
            gr.Markdown(
                """
                ## Citation
                ```bibtex
                @article{wang2024framer,
                  title={Framer: Interactive Frame Interpolation},
                  author={Wang, Wen and Wang, Qiuyu and Zheng, Kecheng and Ouyang, Hao and Chen, Zhekai and Gong, Biao and Chen, Hao and Shen, Yujun and Shen, Chunhua},
                  journal={arXiv preprint https://arxiv.org/abs/2410.18978},
                  year={2024}
                }
                ```
                """
            )

        image_upload_button.upload(
            fn=preprocess_image,
            inputs=image_upload_button,
            outputs=[input_image, first_frame_path, tracking_points],
        )

        image_end_upload_button.upload(
            fn=preprocess_image_end,
            inputs=image_end_upload_button,
            outputs=[input_image_end, last_frame_path, tracking_points],
        )

        add_drag_button.click(
            fn=add_drag,
            inputs=tracking_points,
            outputs=tracking_points,
        )

        delete_last_drag_button.click(
            fn=delete_last_drag,
            inputs=[tracking_points, first_frame_path, last_frame_path],
            outputs=[tracking_points, input_image, input_image_end],
        )

        delete_last_step_button.click(
            fn=delete_last_step,
            inputs=[tracking_points, first_frame_path, last_frame_path],
            outputs=[tracking_points, input_image, input_image_end],
        )

        reset_button.click(
            fn=reset_states,
            inputs=[first_frame_path, last_frame_path, tracking_points],
            outputs=[first_frame_path, last_frame_path, tracking_points],
        )

        input_image.select(
            fn=add_tracking_points,
            inputs=[tracking_points, first_frame_path, last_frame_path],
            outputs=[tracking_points, input_image, input_image_end],
        )

        input_image_end.select(
            fn=add_tracking_points,
            inputs=[tracking_points, first_frame_path, last_frame_path],
            outputs=[tracking_points, input_image, input_image_end],
        )

        run_button.click(
            fn=run,
            inputs=[first_frame_path, last_frame_path, tracking_points, controlnet_cond_scale, motion_bucket_id],
            outputs=output_video,
        )

    demo.launch()