: Log in via a web browser or at the physical NVR to see if the footage plays there. If it does, the issue is strictly with the SmartPSS software.
Sync the time with a reliable NTP server (like windows.com ) or click to instantly match the NVR's clock to your computer's clock. 4. Software and Firmware Incompatibility
: A common fix for missing footage errors in specific SmartPSS versions (like 2.002) is manually replacing the dhnetsdk.dll file in the installation folder ( User Permission Issues
When Smart PSS throws a "NETSDK" error during playback, it means the underlying network software development kit (SDK) failed to execute the command requested by the user interface. The most frequent causes include:
Enable to ensure the NVR syncs with a reliable time server, or manually match it to your PC time. On your PC, ensure your windows time is synchronized. Restart Smart PSS and try the playback again. 3. Update or Roll Back Smart PSS and Device Firmware Failed To Start Playback Netsdk Returns Error Smart Pss
The storage device on the camera or recorder may have bad sectors, causing file read errors. Troubleshooting Steps for "Failed To Start Playback" Follow these steps in order to resolve the issue. 1. Update or Replace the dhnetsdk.dll File
If the recorder is transmitting to a Network Attached Storage (NAS) or an external File Transfer Protocol (FTP) drive instead of an internal hard disk drive (HDD), NetSDK occasionally fails to index the file paths remotely. How to Fix "Failed To Start Playback Netsdk Returns Error"
: Poor network bandwidth or packet loss causing the NetSDK handshake to time out.
Enable to sync with an online time server, or manually match your PC’s exact time. Sync your PC time via Windows Settings. Restart Smart PSS and try the playback again. 2. Verify User Account Permissions : Log in via a web browser or
Are you accessing the cameras (same building) or remotely (over the internet)?
If netsdk.dll is missing or corrupted, applications cannot start or run properly, triggering error popups.
Are you connecting to the recorder using a or a P2P Serial Number ?
| Port | Protocol | Purpose | |------|----------|---------| | 37777 | TCP | Command channel | | 37778 | UDP | Video stream transmission | | 554 | RTSP | Real Time Streaming Protocol | | 80/443 | HTTP/HTTPS | Web interface access | On your PC, ensure your windows time is synchronized
Ensure you are running the latest stable version of Smart PSS (or transition to Smart PSS Lite, which handles newer Dahua firmware protocols better).
Ensure these ports are open and not blocked by firewalls or security software.
Right-click on the camera or recorder experiencing the issue.
In Smart PSS device settings, try changing the login protocol type from TCP to UDP, or vice versa, to see if stability improves. 4. IP Address and Port Conflicts