As a final step, check for firmware updates for your NVR or cameras. Ensure the device's time and DST settings are correctly configured, including a valid NTP server. Flashing the latest firmware can resolve underlying incompatibilities.
By default, Smart PSS attempts to pull the Main Stream (high definition) for playback. If your network connection is slow or remote, it may time out. Right-click the camera channel in the playback window and look for an option to toggle from Main Stream to Sub Stream .
Even if you closed the SmartPSS window, the background process might still be running in the system tray or Task Manager, holding onto the video stream.
This isolates the problem specifically to SmartPSS. This can happen due to several reasons:
The Windows operating system blocks the dhnetsdk.dll script layer from building localized playback cache data if the application lacks administrative read and write paths.