The short answer
A reachable camera can still reject an unknown stream path. Compare the exact product family, channel numbering and profile before changing network settings.
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.
Copy the RTSP path from the documentation for the exact product family. Keep the address, service port, channel and main/substream selector as separate values during diagnosis.
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.
What to verify
Use ONVIF-reported media profiles where available, and record the selected profile token. Profiles can differ in resolution, codec, audio and PTZ associations.
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.