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