用python写一个清除短视频字幕的功能

清除短视频字幕的功能可以通过 OCR 技术实现。以下是一个使用 Python 和 Tesseract OCR 引擎清除短视频字幕的示例代码：

import cv2
import pytesseract

# Load the video file
video = cv2.VideoCapture("path/to/video.mp4")

# Create a Tesseract OCR engine
pytesseract.pytesseract.tesseract_cmd = r"path/to/tesseract.exe"

# Loop through each frame of the video
while True:
    # Read the current frame
    ret, frame = video.read()

    # If the frame was not read successfully, break the loop
    if not ret:
        break

    # Convert the frame to grayscale
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    # Threshold the grayscale image to make the text more prominent
    thresh = cv2.threshold(gray, 0, 255, cv2.THRESH_BINARY_INV + cv2.THRESH_OTSU)[1]

    # Apply a median filter to remove any noise
    median = cv2.medianBlur(thresh, 3)

    # Use Tesseract OCR to extract text from the image
    text = pytesseract.image_to_string(median)

    # If the text is short (less than 10 characters), assume it is a subtitle and remove it
    if len(text.strip()) < 10:
        frame = cv2.rectangle(frame, (0, 0), (frame.shape[1], frame.shape[0]), (0, 0, 0), -1)

    # Display the resulting frame
    cv2.imshow("frame", frame)

    # Wait for the user to press 'q' to quit
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# Release the video file and close all windows
video.release()
cv2.destroyAllWindows()

这个代码使用了 OpenCV 库将视频逐帧读入，然后使用 Tesseract OCR 引擎对每一帧图像进行 OCR 提取文本。如果提取到的文本长度小于 10 个字符，那么就将这一帧的图像全部置为黑色，从而清除掉字幕。