For passive decoding, the decoder will not send decoding request, the data should be sent to the decoder for decoding, so this decoding mode is usually applied to the situation of decoding and displaying local videos on video wall.
Make sure you have called NET_DVR_Init and NET_DVR_Login_V40 to initialize the development environment and log in to the device.
Make sure you have added signal sources, added video outputs, and linked the video outputs to the jointed screens to configure the video wall, see details in Configure Video Wall and Open Roaming Window for details.
Figure 1 API Calling Flow of
Configuring Passive DecodingCall NET_DVR_Logout and NET_DVR_Cleanup to log out and release the resources.