| import argparse |
|
|
| import cv2 |
| import numpy as np |
|
|
|
|
| def main(): |
| parser = argparse.ArgumentParser(description="Overlay mask video on original video.") |
| parser.add_argument("--video", required=True, help="Input video path (mp4).") |
| parser.add_argument("--mask", required=True, help="Mask video path (mkv, single channel).") |
| parser.add_argument("--output", required=True, help="Output mp4 path.") |
| parser.add_argument("--alpha", type=float, default=0.3, help="Mask overlay strength.") |
| args = parser.parse_args() |
|
|
| cap = cv2.VideoCapture(args.video) |
| mask_cap = cv2.VideoCapture(args.mask) |
| if not cap.isOpened(): |
| raise RuntimeError(f"Failed to open video: {args.video}") |
| if not mask_cap.isOpened(): |
| raise RuntimeError(f"Failed to open mask video: {args.mask}") |
|
|
| fps = cap.get(cv2.CAP_PROP_FPS) or 25.0 |
| width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH)) |
| height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT)) |
| fourcc = cv2.VideoWriter_fourcc(*"mp4v") |
| writer = cv2.VideoWriter(args.output, fourcc, fps, (width, height), isColor=True) |
|
|
| frame_idx = 0 |
| try: |
| while True: |
| ret, frame = cap.read() |
| ret_mask, mask = mask_cap.read() |
| if not ret or not ret_mask: |
| break |
|
|
| if mask.ndim == 3: |
| mask_gray = cv2.cvtColor(mask, cv2.COLOR_BGR2GRAY) |
| else: |
| mask_gray = mask |
|
|
| if mask_gray.shape[0] != height or mask_gray.shape[1] != width: |
| mask_gray = cv2.resize(mask_gray, (width, height), interpolation=cv2.INTER_NEAREST) |
|
|
| color = np.zeros_like(frame) |
| color[:, :, 1] = mask_gray |
| overlay = cv2.addWeighted(frame, 1.0 - args.alpha, color, args.alpha, 0) |
| writer.write(overlay) |
| frame_idx += 1 |
| finally: |
| cap.release() |
| mask_cap.release() |
| writer.release() |
|
|
| print(f"Saved {frame_idx} frames to {args.output}") |
|
|
|
|
| if __name__ == "__main__": |
| main() |
|
|
