Thanks again for your support, of course I will give you my feedback if I succeed to solve my config probleme to be able to use NCS in parallel to the NVR connected with my chinese cams.
Currently I am still investigating how to connect the cams with NCS without a rtsp stream.
In addition to my previous tests, I would like to say that a direct http/tcp connection with the cam server ( http://remoteserver.ddns.net:8255/ and then display the video) ils also working but I don’t kon the styream used by CMS.
To summarize my config:
the remort site where the cams are located is accessed through a no-ip internet address (xxxxx.ddns.net) and port forwarding to the different cams.
each cam is configured with a local IP address adress, for example the first cam is 192.168.1.255 and 3 ports: httpport 8255 , rtsp port 554 . a tcp port 34255 (I suppose only used by CMS engine?) ,
for example xxxxx.ddns.net:8255 is forwarded to the cams 192.168.2.255, port 8255
xxxxx.ddns.net:8555 is forwarded to the cams 192.168.2.255, port 554 (rtsp)
xxxxx.ddns.net:34255 is forwarded to the cams 192.168.2.255, port 3255(rtsp)
the rtsp connexion with NCS or VLC is done with the cam 255 with the custom style mode rtps , address: rtsp://xxxxx.ddns.net:8555/user=admin_password=6QNMIQGe_channel=1_stream=0.sdp?
The results of the tests are:
1-runinng NCS + rtps stream 554 (with address above) and NVR +rtsp stream 554 is not OK.
2_running NCS + rtsp stream 554 and a direct http connection with the cam using port 8244 (htp;//xxxxx.ddns.net:8244) and then manually start the video through the CMS interface OK.
3-NCS + rtsp stream 554 and CMS + video stream though the CMS http interface OK (port 8255 or 34255?).
4- NCS + rtps 554 and online device manager rtps stream 554 nok
So the problem is not CMS or NVR but to find out the tcp stream as suggested before by Henrik.
Unfortunately, I don’t know if there is a tool to find out the “tcp” stream, equivalent to the onvif online manager which give directly the rtsp stream path .
I have tried the suggestion of Henrik to find out this tcp stream manually and try to connect the cam in NCS with custom style address without rtsp like 'http://username:password@ipnumer:portnumber/ (using 8255, 34255, etc…) and after trying 10th of possibilities, using adresses given on the cam provider on the net but up to now with no sucess…
Still trying…But a big work …
I will say also that my NVR is not able to manage the MD of my chinses cams ( the parameters usedi n the NVR to configure the MD function are greyed).
Anyway, if I don’t succeed I will give the priority to NCS on a server located on the local cam network as you suggest and remove the NVR.
The NCS software is perfect for my usage (MD with snapshots) but in background I will also try to solve this problem because I am sur that it sould work and that will give a backup of all the video from the different cams.