Python分解视频，第一频会缺失，如何解决？

import cv2
import os
   
def video2frame(videos_path,frames_save_path,time_interval):
    '''
    :param videos_path: 视频的存放路径
    :param frames_save_path: 视频切分成帧之后图片的保存路径
    :param time_interval: 保存间隔
    :return:保存文件数
    '''
    vidcap = cv2.VideoCapture()
    #success, image = vidcap.read()  这里把第一帧丢掉了
    if not vidcap.open(videos_path):
        print("文件打开错误！")
        return -1

    count = 0
    while True:
        success, image = vidcap.read()
        if not success:
            break
        count += 1
        if count % time_interval == 0:
            cv2.imencode('.jpg', image)[1].tofile(frames_save_path + "/frame%d.jpg" % count)
        # if count == 20:
        #   break
    vidcap.release() #释放资源
    #print(count)
    return count

if __name__ == '__main__':
    videos_path = 'test.avi'
    frames_save_path = 'img'
    time_interval = 1  #几帧保存一次
    isExists = os.path.exists(frames_save_path)
    if not isExists:
        os.makedirs(frames_save_path)
    print(video2frame(videos_path, frames_save_path, time_interval))