For some reasons it may be necessary to disable recording of primary or secondary streams. For instance:

•Primary – to save space. Instead it is recommended to set "Motion + LQ" recording type

•Secondary – if secondary stream's bitrate is too high. In this case Nx Witness   server will still do  software motion detection (by decoding asecondary stream for this purpose), but won't record it.

To disable  recording of primary or secondary streams

1.Open Camera Settings and go to Expert.

2.Check I have read the manual and understand the risks.

3.Tick Do not archive primary stream or Do not archive primary stream.