changes. Ensure the time on your NVR/DVR matches your PC exactly. If the camera time is out of sync with the NVR, playback requests may fail. Verify User Permissions
Smart PSS uses specific ports to pull video. If your network is congested, or your WiFi has packet loss, the NetSDK request times out. The error appears even though the device is technically online. failed to start playback netsdk returns error smart pss best
| Cause | Likelihood | Explanation | |-------|-------------|-------------| | | Very High | Playback requests rely on timestamps. Mismatched system times cause rejection. | | Firmware/version mismatch | High | Old NVR firmware + newer SmartPSS version (or vice versa). | | User permissions | High | The logged-in user lacks playback rights for that channel or time range. | | Corrupted or missing recording | Medium | No recording exists at the selected time (e.g., motion only, but selected continuous). | | Network instability | Medium | Packet loss or firewall blocking playback streams (port mismatch). | | Device overload | Low | NVR busy with too many playback requests or HDD issues. | changes
If the error occurs while clicking specific events on the timeline: Avoid clicking directly on the yellow "motion" hashmarks. Verify User Permissions Smart PSS uses specific ports