Please enter the main menu of the recorder-recording configuration-encoding parameters, sub-stream interface, select the corresponding channel, reduce the resolution of the sub-stream and the upper limit value of the bit rate. After adjustment, delete the camera and add it again. If the channel prompt does not support the change function, you can log in to the camera to adjust it through the web page. In the configuration, video and audio interface, adjust the resolution of the sub-stream and the upper limit value of the bit rate.