: Corrupted SD cards or hard drives frequently cause playback failures even if live view remains stable.
: Go to the NVR/DVR settings and ensure NTP (Network Time Protocol) is enabled and that the time exactly matches your PC's time. If a DST shift just occurred, wait until the next day for the index to normalize, or view the footage directly via the device's web interface. failed to start playback netsdk returns error smart pss best
: Ensure SmartPSS is added to your firewall's trusted list . : Corrupted SD cards or hard drives frequently