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Video processing and storage 4

(13) The SCU transfers the media address to the CSAU.

(14) After receiving the real-time media address, the CSAU requests the MDU to start transmitting the
media stream.
(15) The MDU sends a request to the PU for initiating a media stream.
(16) The PU creates a media channel with the MDU and sends the media stream to the MDU.

(17) The MDU transfers the media stream to the CSAU.
(18) The CSAU transfers this media stream to the CSDU to store it in the cloud data nodes.

(19) When the storage plan is completed, the CU sends a stop-media request to the CSAU.
(20) The CSAU transfers this stop request to the MDU.
(21) The MDU returns a response to the CSAU.

(22) The CSAU requests the SCU to disconnect.
(23) The SCU returns a response to end this real-time media storage.

7.4.2 Video file storage

A network video recorder (NVR) is usually used as a typical MSU for continuously recording the surveillance
video from network cameras. When a user wants to upload a video file from the NVR to the cloud storage
system, the CU initiates a storage request and sends it to the SCU to start the media storage.

Figure 7-4 – High-level procedural flows for video file uploading from NVR

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