有没有办法降低 cv2.VideoWriter 实时摄像机录制视频的比特率？

如何解决有没有办法降低 cv2.VideoWriter 实时摄像机录制视频的比特率？

我有一个 python 项目，它从 ip_camera 读取帧并将其写入 .avi 视频，但它的大小变得太大，例如 1 分钟的记录大小约为 200 MB。我想在写入视频的同时降低视频比特率以减小大小。我尝试了很多方法，但没有一个成功。这是我的代码：

import os
from threading import Thread
import cv2


class VideoCamera(object):
    def __init__(self,src=''):
        self.capture = cv2.VideoCapture(src)
        self.status = False
        self.frame = self.capture.read()
        self.frame_width = int(self.capture.get(3))
        self.frame_height = int(self.capture.get(4))
        self.codec = cv2.VideoWriter_fourcc(*'MJPG')
        self.video_name = "video.avi"
        self.output_video = cv2.VideoWriter(
            self.video_name,self.codec,5,(self.frame_width,self.frame_height))
        self.stream_thread = Thread(target=self.update,args=())
        self.record_thread = Thread(target=self.record,args=())
        self.stream_thread.daemon = True
        self.stream_thread.start()

    def update(self):
        while True:
            if self.capture.isOpened():
                (self.status,self.frame) = self.capture.read()

    def record(self):
        print('schedule')
        while True:
            print('stop recording')
            self.capture.release()
            self.output_video.release()
            cv2.destroyAllWindows()
            break
            try:
                if self.status:
                    self.output_video.write(self.frame)
            except AttributeError:
                pass


    def start_recording(self):
        self.record_thread.start()


if __name__ == '__main__':
    cam = VideoCamera('rtsp://<username>:<password>@<camera_ip>:<camera_port>')
    cam.start_recording()