: If you are trying to play back the "Sub Stream" but the recorder only has "Main Stream" footage saved, it may return an SDK error. Toggle between Main Stream and Sub Stream in the playback search settings.
End of Paper
The dhnetsdk.dll file is either corrupted, missing, or outdated. : If you are trying to play back
Obtain a stable version of the dhnetsdk.dll library file directly from an official Dahua Wiki Support Page or trusted supplier portal. : If you are trying to play back