This error OSCVG16-025544 means device returns no video source, in this case, recommend the following:
1, the output bandwidth exceeds the maximum limit of the device, check whether the device is added/streamed by more than one platform client at the same time, reduce the number of platform clients adding the device at the same time and reduce the number of streaming at the same time.
2, It is recommended to change the device password, reboot the device, and upgrade the device to the latest FW version.