| import cv2 | |
| import numpy as np | |
| import random | |
| import tempfile | |
| from moviepy.editor import VideoFileClip | |
| from utils import resize_image, text_to_image | |
| def add_and_detect_watermark_video(video_path, watermark_text, num_watermarks=5): | |
| def add_watermark_to_frame(frame): | |
| watermark_positions = [] | |
| h, w, _ = frame.shape | |
| h_new = (h // 8) * 8 | |
| w_new = (w // 8) * 8 | |
| frame_resized = cv2.resize(frame, (w_new, h_new)) | |
| ycrcb_image = cv2.cvtColor(frame_resized, cv2.COLOR_BGR2YCrCb) | |
| y_channel, cr_channel, cb_channel = cv2.split(ycrcb_image) | |
| dct_y = cv2.dct(np.float32(y_channel)) | |
| rows, cols = dct_y.shape | |
| font = cv2.FONT_HERSHEY_SIMPLEX | |
| for _ in range(num_watermarks): | |
| text_size = cv2.getTextSize(watermark_text, font, 0.5, 1)[0] | |
| text_x = random.randint(0, cols - text_size[0]) | |
| text_y = random.randint(text_size[1], rows) | |
| watermark = np.zeros_like(dct_y) | |
| watermark = cv2.putText(watermark, watermark_text, (text_x, text_y), font, 0.5, (1, 1, 1), 1, cv2.LINE_AA) | |
| dct_y += watermark * 0.01 | |
| watermark_positions.append((text_x, text_y, text_size[0], text_size[1])) | |
| idct_y = cv2.idct(dct_y) | |
| ycrcb_image[:, :, 0] = idct_y | |
| watermarked_frame = cv2.cvtColor(ycrcb_image, cv2.COLOR_YCrCb2BGR) | |
| watermark_highlight = watermarked_frame.copy() | |
| for (text_x, text_y, text_w, text_h) in watermark_positions: | |
| cv2.putText(watermark_highlight, watermark_text, (text_x, text_y), font, 0.5, (0, 0, 255), 1, cv2.LINE_AA) | |
| cv2.rectangle(watermark_highlight, (text_x, text_y - text_h), (text_x + text_w, text_y), (0, 0, 255), 2) | |
| return watermarked_frame, watermark_highlight | |
| video = VideoFileClip(video_path) | |
| video_with_watermark = video.fl_image(lambda frame: add_watermark_to_frame(frame)[0]) | |
| video_with_highlight = video.fl_image(lambda frame: add_watermark_to_frame(frame)[1]) | |
| temp_fd, watermarked_video_path = tempfile.mkstemp(suffix=".mp4") | |
| temp_fd_highlight, highlight_video_path = tempfile.mkstemp(suffix=".mp4") | |
| video_with_watermark.write_videofile(watermarked_video_path, codec='libx264') | |
| video_with_highlight.write_videofile(highlight_video_path, codec='libx264') | |
| return watermarked_video_path, highlight_video_path, watermarked_video_path, highlight_video_path | |