NVRs and DVRs have finite decoding and streaming capabilities. If multiple Smart PSS clients simultaneously request playback from the same device, or if the device is busy recording from multiple high-bitrate cameras while exporting or performing RAID rebuilds, its NetsDK process may queue or reject new playback requests. The returned error is effectively a “server busy” signal, albeit poorly translated.
If the software database is corrupted, playback fails instantly. failed to start playback netsdk returns error smart pss best
If the NetSDK error refuses to go away, the problem may be architectural. Here are your workarounds: NVRs and DVRs have finite decoding and streaming