app.py

import subprocess
import re
from typing import List, Tuple, Optional

# Define the command to be executed
command = ["python", "setup.py", "build_ext", "--inplace"]

# Execute the command
result = subprocess.run(command, capture_output=True, text=True)

# Print the output and error (if any)
print("Output:\n", result.stdout)
print("Errors:\n", result.stderr)

# Check if the command was successful
if result.returncode == 0:
    print("Command executed successfully.")
else:
    print("Command failed with return code:", result.returncode)

import gradio as gr
from datetime import datetime
import os
os.environ["TORCH_CUDNN_SDPA_ENABLED"] = "1"
import torch
import numpy as np
import cv2
import matplotlib.pyplot as plt
from PIL import Image, ImageFilter
from sam2.build_sam import build_sam2_video_predictor

from moviepy.editor import ImageSequenceClip

def get_video_fps(video_path):
    # Open the video file
    cap = cv2.VideoCapture(video_path)
    
    if not cap.isOpened():
        print("Error: Could not open video.")
        return None
    
    # Get the FPS of the video
    fps = cap.get(cv2.CAP_PROP_FPS)

    return fps

def clear_points(image):
    # we clean all
    return [
        image,   # first_frame_path
        gr.State([]),      # tracking_points
        gr.State([]),      # trackings_input_label
        image,   # points_map
        gr.State()     # stored_inference_state
    ]

def preprocess_video_in(video_path):

    # Generate a unique ID based on the current date and time
    unique_id = datetime.now().strftime('%Y%m%d%H%M%S')
    
    # Set directory with this ID to store video frames 
    extracted_frames_output_dir = f'frames_{unique_id}'
    
    # Create the output directory
    os.makedirs(extracted_frames_output_dir, exist_ok=True)

    ### Process video frames ###
    # Open the video file
    cap = cv2.VideoCapture(video_path)
    
    if not cap.isOpened():
        print("Error: Could not open video.")
        return None

    # Get the frames per second (FPS) of the video
    fps = cap.get(cv2.CAP_PROP_FPS)
    
    # Calculate the number of frames to process (10 seconds of video)
    max_frames = int(fps * 10)
    
    frame_number = 0
    first_frame = None
    
    while True:
        ret, frame = cap.read()
        if not ret or frame_number >= max_frames:
            break
        
        # Format the frame filename as '00000.jpg'
        frame_filename = os.path.join(extracted_frames_output_dir, f'{frame_number:05d}.jpg')
        
        # Save the frame as a JPEG file
        cv2.imwrite(frame_filename, frame)
        
        # Store the first frame
        if frame_number == 0:
            first_frame = frame_filename
        
        frame_number += 1
    
    # Release the video capture object
    cap.release()
    
    # scan all the JPEG frame names in this directory
    scanned_frames = [
        p for p in os.listdir(extracted_frames_output_dir)
        if os.path.splitext(p)[-1] in [".jpg", ".jpeg", ".JPG", ".JPEG"]
    ]
    scanned_frames.sort(key=lambda p: int(os.path.splitext(p)[0]))
    print(f"SCANNED_FRAMES: {scanned_frames}")
    
    return [
        first_frame,           # first_frame_path
        gr.State([]),          # tracking_points
        gr.State([]),          # trackings_input_label
        first_frame,           # input_first_frame_image
        first_frame,           # points_map
        extracted_frames_output_dir,            # video_frames_dir
        scanned_frames,        # scanned_frames
        None,                  # stored_inference_state
        None,                  # stored_frame_names
        gr.update(open=False)  # video_in_drawer
    ]

def get_point(point_type, tracking_points, trackings_input_label, first_frame_path, evt: gr.SelectData):
    print(f"You selected {evt.value} at {evt.index} from {evt.target}")

    tracking_points.value.append(evt.index)
    print(f"TRACKING POINT: {tracking_points.value}")

    if point_type == "include":
        trackings_input_label.value.append(1)
    elif point_type == "exclude":
        trackings_input_label.value.append(0)
    print(f"TRACKING INPUT LABEL: {trackings_input_label.value}")
    
    # Open the image and get its dimensions
    transparent_background = Image.open(first_frame_path).convert('RGBA')
    w, h = transparent_background.size
    
    # Define the circle radius as a fraction of the smaller dimension
    fraction = 0.02  # You can adjust this value as needed
    radius = int(fraction * min(w, h))
    
    # Create a transparent layer to draw on
    transparent_layer = np.zeros((h, w, 4), dtype=np.uint8)
    
    for index, track in enumerate(tracking_points.value):
        if trackings_input_label.value[index] == 1:
            cv2.circle(transparent_layer, track, radius, (0, 255, 0, 255), -1)
        else:
            cv2.circle(transparent_layer, track, radius, (255, 0, 0, 255), -1)

    # Convert the transparent layer back to an image
    transparent_layer = Image.fromarray(transparent_layer, 'RGBA')
    selected_point_map = Image.alpha_composite(transparent_background, transparent_layer)
    
    return tracking_points, trackings_input_label, selected_point_map
    
# use bfloat16 for the entire notebook
torch.autocast(device_type="cuda", dtype=torch.bfloat16).__enter__()

if torch.cuda.get_device_properties(0).major >= 8:
    # turn on tfloat32 for Ampere GPUs (https://pytorch.org/docs/stable/notes/cuda.html#tensorfloat-32-tf32-on-ampere-devices)
    torch.backends.cuda.matmul.allow_tf32 = True
    torch.backends.cudnn.allow_tf32 = True
    
def show_mask(mask, ax, obj_id=None, random_color=False):
    if random_color:
        color = np.concatenate([np.random.random(3), np.array([0.6])], axis=0)
    else:
        cmap = plt.get_cmap("tab10")
        cmap_idx = 0 if obj_id is None else obj_id
        color = np.array([*cmap(cmap_idx)[:3], 0.6])
    h, w = mask.shape[-2:]
    mask_image = mask.reshape(h, w, 1) * color.reshape(1, 1, -1)
    ax.imshow(mask_image)


def show_points(coords, labels, ax, marker_size=200):
    pos_points = coords[labels==1]
    neg_points = coords[labels==0]
    ax.scatter(pos_points[:, 0], pos_points[:, 1], color='green', marker='*', s=marker_size, edgecolor='white', linewidth=1.25)
    ax.scatter(neg_points[:, 0], neg_points[:, 1], color='red', marker='*', s=marker_size, edgecolor='white', linewidth=1.25)

def show_box(box, ax):
    x0, y0 = box[0], box[1]
    w, h = box[2] - box[0], box[3] - box[1]
    ax.add_patch(plt.Rectangle((x0, y0), w, h, edgecolor='green', facecolor=(0, 0, 0, 0), lw=2))    


def load_model(checkpoint):
    # Load model accordingly to user's choice
    if checkpoint == "tiny":
        sam2_checkpoint = "./checkpoints/sam2_hiera_tiny.pt"
        model_cfg = "sam2_hiera_t.yaml"
        return [sam2_checkpoint, model_cfg]
    elif checkpoint == "samll":
        sam2_checkpoint = "./checkpoints/sam2_hiera_small.pt"
        model_cfg = "sam2_hiera_s.yaml"
        return [sam2_checkpoint, model_cfg]
    elif checkpoint == "base-plus":
        sam2_checkpoint = "./checkpoints/sam2_hiera_base_plus.pt"
        model_cfg = "sam2_hiera_b+.yaml"
        return [sam2_checkpoint, model_cfg]
    elif checkpoint == "large":
        sam2_checkpoint = "./checkpoints/sam2_hiera_large.pt"
        model_cfg = "sam2_hiera_l.yaml"
        return [sam2_checkpoint, model_cfg]

    
    
def get_mask_sam_process(
    input_first_frame_image, 
    checkpoint, 
    tracking_points, 
    trackings_input_label, 
    video_frames_dir, # extracted_frames_output_dir defined in 'preprocess_video_in' function
    scanned_frames, 
    working_frame: str = None, # current frame being added points
    available_frames_to_check: List[str] = [],
    progress=gr.Progress(track_tqdm=True)
):
    
    # get model and model config paths
    print(f"USER CHOSEN CHECKPOINT: {checkpoint}")
    sam2_checkpoint, model_cfg = load_model(checkpoint)
    print("MODEL LOADED")

    # set predictor 
    predictor = build_sam2_video_predictor(model_cfg, sam2_checkpoint)
    print("PREDICTOR READY")

    # `video_dir` a directory of JPEG frames with filenames like `<frame_index>.jpg`
    print(f"STATE FRAME OUTPUT DIRECTORY: {video_frames_dir}")
    video_dir = video_frames_dir
    
    # scan all the JPEG frame names in this directory
    frame_names = scanned_frames

    # Init SAM2 inference_state
    inference_state = predictor.init_state(video_path=video_dir)
    print("NEW INFERENCE_STATE INITIATED")

    # segment and track one object
    # predictor.reset_state(inference_state) # if any previous tracking, reset

    ### HANDLING WORKING FRAME
    # new_working_frame = None
    # Add new point
    if working_frame is None:
        ann_frame_idx = 0  # the frame index we interact with, 0 if it is the first frame
        working_frame = "frame_0.jpg"
    else:
        # Use a regular expression to find the integer
        match = re.search(r'frame_(\d+)', working_frame)
        if match:
            # Extract the integer from the match
            frame_number = int(match.group(1))
            ann_frame_idx = frame_number
            
    print(f"NEW_WORKING_FRAME PATH: {working_frame}")
    
    ann_obj_id = 1  # give a unique id to each object we interact with (it can be any integers)
    
    # Let's add a positive click at (x, y) = (210, 350) to get started
    points = np.array(tracking_points.value, dtype=np.float32)
    # for labels, `1` means positive click and `0` means negative click
    labels = np.array(trackings_input_label.value, np.int32)
    _, out_obj_ids, out_mask_logits = predictor.add_new_points(
        inference_state=inference_state,
        frame_idx=ann_frame_idx,
        obj_id=ann_obj_id,
        points=points,
        labels=labels,
    )

    # Create the plot
    plt.figure(figsize=(12, 8))
    plt.title(f"frame {ann_frame_idx}")
    plt.imshow(Image.open(os.path.join(video_dir, frame_names[ann_frame_idx])))
    show_points(points, labels, plt.gca())
    show_mask((out_mask_logits[0] > 0.0).cpu().numpy(), plt.gca(), obj_id=out_obj_ids[0])
    
    # Save the plot as a JPG file
    first_frame_output_filename = "output_first_frame.jpg"
    plt.savefig(first_frame_output_filename, format='jpg')
    plt.close()
    torch.cuda.empty_cache()

    # Assuming available_frames_to_check.value is a list
    if working_frame not in available_frames_to_check:
        available_frames_to_check.append(working_frame)
    
    return "output_first_frame.jpg", frame_names, inference_state, gr.update(choices=available_frames_to_check.value, value=working_frame, visible=True)

def propagate_to_all(video_in, checkpoint, stored_inference_state, stored_frame_names, video_frames_dir, vis_frame_type, progress=gr.Progress(track_tqdm=True)):   
    #### PROPAGATION ####
    sam2_checkpoint, model_cfg = load_model(checkpoint)
    predictor = build_sam2_video_predictor(model_cfg, sam2_checkpoint)
    
    inference_state = stored_inference_state
    frame_names = stored_frame_names
    video_dir = video_frames_dir
    
    # Define a directory to save the JPEG images
    frames_output_dir = "frames_output_images"
    os.makedirs(frames_output_dir, exist_ok=True)
    
    # Initialize a list to store file paths of saved images
    jpeg_images = []

    # run propagation throughout the video and collect the results in a dict
    video_segments = {}  # video_segments contains the per-frame segmentation results
    for out_frame_idx, out_obj_ids, out_mask_logits in predictor.propagate_in_video(inference_state):
        video_segments[out_frame_idx] = {
            out_obj_id: (out_mask_logits[i] > 0.0).cpu().numpy()
            for i, out_obj_id in enumerate(out_obj_ids)
        }
    
    # render the segmentation results every few frames
    if vis_frame_type == "check":
        vis_frame_stride = 15
    elif vis_frame_type == "render":
        vis_frame_stride = 1
    
    plt.close("all")
    for out_frame_idx in range(0, len(frame_names), vis_frame_stride):
        plt.figure(figsize=(6, 4))
        plt.title(f"frame {out_frame_idx}")
        plt.imshow(Image.open(os.path.join(video_dir, frame_names[out_frame_idx])))
        for out_obj_id, out_mask in video_segments[out_frame_idx].items():
            show_mask(out_mask, plt.gca(), obj_id=out_obj_id)

        # Define the output filename and save the figure as a JPEG file
        output_filename = os.path.join(frames_output_dir, f"frame_{out_frame_idx}.jpg")
        plt.savefig(output_filename, format='jpg')
    
        # Close the plot
        plt.close()

        # Append the file path to the list
        jpeg_images.append(output_filename)

    torch.cuda.empty_cache()
    print(f"JPEG_IMAGES: {jpeg_images}")

    if vis_frame_type == "check":
        return gr.update(value=jpeg_images), gr.update(value=None), gr.update(choices=jpeg_images, value=None, visible=True)
    elif vis_frame_type == "render":
        # Create a video clip from the image sequence
        original_fps = get_video_fps(video_in)
        fps = original_fps  # Frames per second
        total_frames = len(jpeg_images)
        clip = ImageSequenceClip(jpeg_images, fps=fps)
        # Write the result to a file
        final_vid_output_path = "output_video.mp4"
        
        # Write the result to a file
        clip.write_videofile(
            final_vid_output_path,
            codec='libx264'
        )
        
        return gr.update(value=None), gr.update(value=final_vid_output_path), None

def update_ui(vis_frame_type):
    if vis_frame_type == "check":
        return gr.update(visible=True), gr.update(visible=False)
    elif vis_frame_type == "render":
        return gr.update(visible=False), gr.update(visible=True)

def switch_working_frame(working_frame, scanned_frames, video_frames_dir):
    new_working_frame = None
    if working_frame == None:
        new_working_frame = os.path.join(video_frames_dir, scanned_frames[0])
        return new_working_frame, gr.State([]), gr.State([]), new_working_frame, new_working_frame, new_working_frame
    else:
        # Use a regular expression to find the integer
        match = re.search(r'frame_(\d+)', working_frame)
        if match:
            # Extract the integer from the match
            frame_number = int(match.group(1))
            ann_frame_idx = frame_number
            new_working_frame = os.path.join(video_frames_dir, scanned_frames[ann_frame_idx])
            return new_working_frame, gr.State([]), gr.State([]), new_working_frame, new_working_frame, new_working_frame

with gr.Blocks() as demo:
    first_frame_path = gr.State()
    tracking_points = gr.State([])
    trackings_input_label = gr.State([])
    video_frames_dir = gr.State()
    scanned_frames = gr.State()
    stored_inference_state = gr.State()
    stored_frame_names = gr.State()
    available_frames_to_check = gr.State([])
    with gr.Column():
        gr.Markdown("# SAM2 Video Predictor")
        gr.Markdown("This is a simple demo for video segmentation with SAM2.")
        gr.Markdown("""Instructions: 
        
        1. Upload your video 
        2. With 'include' point type selected, Click on the object to mask on first frame
        3. Switch to 'exclude' point type if you want to specify an area to avoid
        4. Submit !
        """)
        with gr.Row():
            
            with gr.Column():
                
                
                with gr.Row():
                    point_type = gr.Radio(label="point type", choices=["include", "exclude"], value="include", scale=2)
                    clear_points_btn = gr.Button("Clear Points", scale=1)
                
                input_first_frame_image = gr.Image(label="input image", interactive=False, type="filepath", visible=False)                 
                
                points_map = gr.Image(
                    label="Point n Click map", 
                    type="filepath",
                    interactive=False
                )
                
                with gr.Row():
                    checkpoint = gr.Dropdown(label="Checkpoint", choices=["tiny", "small", "base-plus", "large"], value="tiny")
                    submit_btn = gr.Button("Submit", size="lg")

                with gr.Accordion("Your video IN", open=True) as video_in_drawer:
                    video_in = gr.Video(label="Video IN")
            
            with gr.Column():
                
                working_frame = gr.Dropdown(label="working frame ID", choices=[""], value=None, visible=False, allow_custom_value=False, interactive=True)
                output_result = gr.Image(label="current working mask ref")
                with gr.Row():
                    vis_frame_type = gr.Radio(label="Propagation level", choices=["check", "render"], value="check", scale=2)
                    propagate_btn = gr.Button("Propagate", scale=1)
                output_propagated = gr.Gallery(label="Propagated Mask samples gallery", visible=False)
                output_video = gr.Video(visible=False)
                # output_result_mask = gr.Image()
    
    

    # When new video is uploaded
    video_in.upload(
        fn = preprocess_video_in, 
        inputs = [video_in], 
        outputs = [
            first_frame_path, 
            tracking_points, # update Tracking Points in the gr.State([]) object
            trackings_input_label, # update Tracking Labels in the gr.State([]) object
            input_first_frame_image, # hidden component used as ref when clearing points
            points_map, # Image component where we add new tracking points
            video_frames_dir, # Array where frames from video_in are deep stored
            scanned_frames, # Scanned frames by SAM2
            stored_inference_state, # Sam2 inference state
            stored_frame_names, # 
            video_in_drawer, # Accordion to hide uploaded video player
        ],
        queue = False
    )

    
    # triggered when we click on image to add new points
    points_map.select(
        fn = get_point, 
        inputs = [
            point_type, # "include" or "exclude"
            tracking_points, # get tracking_points values
            trackings_input_label, # get tracking label values
            first_frame_path, # gr.State() first frame path
        ], 
        outputs = [
            tracking_points, # updated with new points
            trackings_input_label, # updated with corresponding labels
            points_map, # updated image with points
        ], 
        queue = False
    )

    # Clear every points clicked and added to the map
    clear_points_btn.click(
        fn = clear_points,
        inputs = input_first_frame_image, # we get the untouched hidden image
        outputs = [
            first_frame_path, 
            tracking_points, 
            trackings_input_label, 
            points_map, 
            stored_inference_state,
        ],
        queue=False
    )

    """
    working_frame.change(
        fn = switch_working_frame,
        inputs = [working_frame, scanned_frames, video_frames_dir],
        outputs = [first_frame_path, tracking_points, trackings_input_label, input_first_frame_image, points_map, working_frame],
        queue=False
    )
    """

    submit_btn.click(
        fn = get_mask_sam_process,
        inputs = [
            input_first_frame_image, 
            checkpoint, 
            tracking_points, 
            trackings_input_label, 
            video_frames_dir, 
            scanned_frames, 
            working_frame,
            available_frames_to_check,
        ],
        outputs = [
            output_result, 
            stored_frame_names, 
            stored_inference_state,
            working_frame,
        ]
    )

    propagate_btn.click(
        fn = update_ui,
        inputs = [vis_frame_type],
        outputs = [output_propagated, output_video],
        queue=False
    ).then(
        fn = propagate_to_all,
        inputs = [video_in, checkpoint, stored_inference_state, stored_frame_names, video_frames_dir, vis_frame_type],
        outputs = [output_propagated, output_video, working_frame]
    )

demo.launch(show_api=False, show_error=True)