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Two Real Streams, Side by Side

Side-by-Side Dual Camera Comparator

Two independent live camera streams, rendered side by side for a direct comparison — two webcams, or a webcam against a smartphone. If your OS only allows one active stream at a time, the failed device's exact error shows directly rather than a silent blank screen.

Camera A: Camera B:

Select two devices and click Start Both.

Camera A

Camera B

Notes

Why This Shows Raw Feeds, Not a Score

Deciding which of two cameras looks "better" depends on lighting, subject, and personal taste in ways a single automated number cannot honestly capture. This shows both feeds live, side by side, with the real negotiated resolution, frame rate, and device label under each — the same conditions, the same moment, so the comparison is fair. Your own eyes are the actual judge.

Reference

What to Look For

Check	What it tells you
Negotiated resolution/fps under each feed	What each camera actually delivers, not just its marketing spec.
Sharpness at the same distance	Lens and sensor quality difference, viewed side by side.
Color rendering under the same light	Whether one camera runs warmer, cooler, or more accurate.
Low-light behavior	Dim the room and compare noise and brightness retention.

Step-by-Step

How to Run a Fair Comparison

Select both cameras from the dropdowns.
Click "Start Both" and allow access when prompted.
Sit still in the same spot so both feeds see the identical scene and lighting.
Compare the info line under each feed for real negotiated resolution and frame rate, then judge sharpness and color with your own eyes.

Common Issues

Troubleshooting

Only one camera startsSome operating systems and drivers only allow one active camera stream at a time — the failed device shows its specific error directly.

Camera access blockedClick the camera icon in your browser's address bar to confirm this site is allowed, or check your OS's camera privacy settings.

Both cameras show the same deviceCheck the dropdowns — it's easy to accidentally select the same physical camera for both slots.

Common Questions

Frequently Asked Questions

Why does only one camera start?

Some operating systems and drivers only allow one active camera stream at a time regardless of how many are connected — when that happens the failed device shows its specific error directly rather than silently doing nothing.

Can I compare a phone camera against a webcam?

Yes — once your phone is connected via Continuity Camera, DroidCam, or a similar app, it appears as a normal selectable device here alongside any USB webcam.

Why doesn't this give an automatic winner?

Which camera looks "better" depends on lighting, subject, and personal taste in ways a single number cannot honestly capture. Showing both feeds live under the same real conditions, with genuine negotiated settings displayed, is more useful than a fabricated score.

Does this work with two cameras from different brands?

Yes — any two devices your browser can access via getUserMedia can be compared, regardless of brand or connection type.

Can I use this to compare the same camera at two different settings?

Not directly — each side connects to a distinct physical device selected from the dropdown, so it compares two different cameras rather than one camera at two configurations.