Coding-视频转图片

• 按将一个视频切片成图片

按将一个视频切片成图片

import cv2
import os
def extract_frames(video_path, output_folder):
    """
    Extract frames from a video and save them to a specified folder.

    Parameters:
    video_path (str): The path to the video file.
    output_folder (str): The path to the folder where frames will be saved.
    """
    # Create the output folder if it does not exist
    if not os.path.exists(output_folder):
        os.makedirs(output_folder)

    # Open the video file
    vidcap = cv2.VideoCapture(video_path)

    # Check if video file was opened successfully
    if not vidcap.isOpened():
        print("Error opening video file")
        return

    # Read the video frame by frame
    success, image = vidcap.read()
    count = 0
    while success:
        # Save the frame as an image file
        cv2.imwrite(os.path.join(output_folder, "frame{:d}.jpg".format(count)), image)
        success, image = vidcap.read()
        count += 1

    print(f"Extracted {count} frames.")

video_path = 'nn.mp4'
video_outdir =  'video_data4'
extract_frames(video_path,video_outdir)