USB Multi-Camera Bandwidth & Connection Planner
Two cameras work alone but fail together? Map the shared connection, calculate each video stream, and find where reducing a mode or changing a port can help.
MultiCam Planner
Start with the details you know. Unknown answers stay unknown. Try the example to see how the check works.
Your inputs
Required fields are marked with an asterisk.
Your report
A practical interpretation of your evidence.
Make the next step clear.
Your findings, assumptions and next steps will appear here after you run the check.
MultiCam Planner · https://multicam.kitforma.com/ · KitForma
Raw video math with explicit units
Shared-path and device-link checks
A downloadable connection plan
Understand your setup.
Focused guides explain the rules, the edge cases and the checks worth doing before you act.
Why two webcams fail on one USB hub
Trace the shared path before buying another hub or changing camera settings.
Read the guide ↗Field guide / 02YUY2, NV12 and MJPEG: calculate the right bandwidth
Use raw pixel math where it applies and measured compressed data where it does not.
Read the guide ↗Field guide / 03A practical multi-camera troubleshooting order
Separate bandwidth, power, driver and decoding problems with repeatable tests.
Read the guide ↗Before you start
Does a powered USB hub add bandwidth?
It can address a power-delivery problem. Cameras on the hub still share its upstream connection, so powering the hub does not itself increase that connection’s bandwidth.
Why is 1080p30 YUY2 so demanding?
At 16 bits per pixel, 1920 × 1080 × 30 requires 995.328 Mbps before USB transport overhead. That is greater than the raw 480 Mbps signaling rate of USB 2. A device may offer MJPEG or a lower mode instead.
Can you calculate MJPEG bandwidth from resolution?
No reliable fixed result follows from resolution and frame rate alone. Enter a measured or documented peak bitrate; an average file bitrate can understate capture transport demand.
Are two physical ports independent?
Not necessarily. Check the computer or dock topology and shared controller uplinks. Bus letters in this planner are labels you assign after that inspection.
Does a green bandwidth check guarantee capture?
No. Endpoint reservations, drivers, power, cables, USB scheduling and decoding load can still prevent a stable stream. The planner separates calculated payload from those untested factors.
Sources & assumptions
Rules are reviewed against the references below. Manufacturer updates, firmware and your exact setup can change the result.
- Teledyne: USB multiple-camera bandwidth calculation ↗
Pixel-format payload calculation and shared camera throughput; reviewed 13 October 2026.
- XIMEA: Multiple cameras and shared controllers ↗
Hubs share an upstream path; published hardware examples are not universal limits.
Reviewed 2026-10-13. Read our methodology or report an issue.