The short answer
Channel numbering and lens selection are vendor-specific. Confirm the physical scene, because a valid RTSP session can display the wrong sensor without an error.
Work through the checks
Identify the camera by model, hardware revision, firmware and MAC address. Keep this inventory separate from passwords; two devices with similar names may expose different protocols.
Decide whether the source is the camera itself or an NVR channel. Use the recorder address and recorder account for a recorder-provided stream, and check its channel numbering separately.
Match the requested channel or lens to the manufacturer’s numbering. A valid stream from the wrong channel can look like success while showing another camera.
Use ONVIF-reported media profiles where available, and record the selected profile token. Profiles can differ in resolution, codec, audio and PTZ associations.
What to verify
Test one camera and one stream before opening a larger camera wall. Keep the camera settings unchanged while you establish whether the first live image is stable.
Sources and scope
AeoCam is available for Windows. Camera settings below describe protocol preparation, not a certification of a particular camera or a promise of every feature in every app version. Check the installed build and the Microsoft Store listing for current availability.
Vendor documents describe the camera or protocol. No physical-camera compatibility test is claimed here. Menus and capabilities can change with model and firmware.