import cv2


def extract_frames(video_path, num_frames=32):

    cap = cv2.VideoCapture(video_path)

    if not cap.isOpened():
        raise RuntimeError("Cannot open video")

    total = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))

    step = max(total // num_frames, 1)

    frames = []

    for i in range(num_frames):

        cap.set(cv2.CAP_PROP_POS_FRAMES, i * step)

        ret, frame = cap.read()

        if not ret:
            break

        frames.append(frame)

    cap.release()

    if len(frames) == 0:
        raise RuntimeError("No frames extracted")

    while len(frames) < num_frames:
        frames.append(frames[-1])

    return frames