Start with the mode the application actually requests
A camera’s advertised resolution is only part of the load. Record its selected frame rate and capture format inside your recording software. A 1080p mode using YUY2 sends a very different payload from 1080p MJPEG. If an app silently changes the format, recalculate the plan from the negotiated settings.
Draw the narrowest shared connection
Label cameras A when their traffic must cross the same limited upstream path. Put cameras on B only after confirming there is additional capacity there. A USB-C connector, another hub socket or a dock with many ports is not enough evidence. The manufacturer’s topology view or your operating system’s USB tree can help identify shared paths.
Test one change at a time
- Start with a single camera and a repeatable scene.
- Add the second camera without changing resolution, frame rate or format.
- Try a lower raw frame rate or a documented compressed mode.
- Test a verified separate path before purchasing new hardware.
- Keep a short dropped-frame log to distinguish transport failures from encoder overload.