保存图片和视频以供离线访问的解决方法可以通过使用Python的requests库和openCV库来完成。下面是一个示例代码，演示了如何保存图片和视频：

保存图片：

import requests

def save_image(url, file_path):
    response = requests.get(url, stream=True)
    if response.status_code == 200:
        with open(file_path, 'wb') as file:
            for chunk in response.iter_content(1024):
                file.write(chunk)
        print("图片保存成功！")
    else:
        print("下载图片失败！")

# 示例用法
url = "https://example.com/image.jpg"
file_path = "image.jpg"
save_image(url, file_path)

保存视频：

import requests
import cv2

def save_video(url, file_path):
    response = requests.get(url, stream=True)
    if response.status_code == 200:
        with open(file_path, 'wb') as file:
            for chunk in response.iter_content(1024):
                file.write(chunk)
        print("视频保存成功！")
    else:
        print("下载视频失败！")

# 示例用法
url = "https://example.com/video.mp4"
file_path = "video.mp4"
save_video(url, file_path)

请注意，在示例代码中，需要将url替换为要保存的图片或视频的URL，将file_path替换为要保存的文件路径。