Cms Software Recomendation

Does anyone know of a CMS that allows custom camera display from different NVR's? Example: camera 2 and 3 from NVR A and cameras 1, 2, 7, and 8 from NVR B.

Do you already have the NVRs in place? I ask because that would typically dictate the CMS to use as generally NVRs are not supported by third party CMSes.

i believe most allow that through a CMS but not through a web browser. John is correct that CMS's for the most part are brand specific and sometimes device specific.

I know for sure that the Dahua PSS and Smart PSS allow this. I'm pretty sure most CMS would as well.