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Show HN: A weird thing that detects your pulse from the browser video

https://pulsefeedback.io/
32•kilroy123•3d ago

Comments

amagasaki•2h ago
Could be interesting, but allowing the webcam crashes my browser.Repeatedly

macOS 15.7.1 (24G231) Brave 1.87.186 (Official Build) (arm64) Chromium: 145.0.7632.45

serious_angel•1h ago
In the minified source code, we may see, it uses:

``` try { const l=await navigator.mediaDevices.getUserMedia({audio:!1,video:{facingMode:"user"}}); /* ... */ } catch { this.showError("Could not access webcam. Please check permissions.") } ```

There are alternatives to verify mediaDevices support as https://addpipe.com/getusermedia-examples/

gumboshoes•1h ago
Worked for me on Android. Love the simplicity.
hluska•1h ago
I would prefer some kind of privacy statement or even some kind of explanation about what is going on before I just randomly turn my webcam on. This might be great and I’m proud of you for launching but I don’t do things like that. Heck, videos can make a person’s heart race - I had my first attack at 39 and that’s a hell of a lot of risk.
serious_angel•1h ago
I haven't dug deeper due to time availability, but for the same sake of privacy, I've found:

1. `/api/event` endpoint mentioned in the `/stats/script.js` file;

2. There's `/parties/lobby/main/telemetry` in a minified JavaScript chunk asset;

3. There's VitalLens mentioned, and there's an error string in the same asset: "A valid API key or proxy URL is required to use VitalLens. If you signed up recently, please try again in a minute to allow your API key to become active. Otherwise, head to https://www.rouast.com/api to get a free API key."

hluska•1h ago
This is really kind of you - I appreciate this. Thank you for taking that time!
functionmouse•1h ago
I feel like the primary use case for such a technology is manipulating and profiling people over video chat, maybe even autonomously. Hiring managers, HR, landlords, and police are obvious customers.

The response I anticipate will be "But this will help doctors over telehealth and stuff!" - Please see https://calebhearth.com/dont-get-distracted

metalcrow•1h ago
Can you explain how https://calebhearth.com/dont-get-distracted applies to the potential response you described? I don't get it.
croes•1h ago
They will weaponize it.
godelski•7m ago
Don't get distracted, sit down and read it in full.

Don't get distracted, think about what he wrote.

If you still don't get it, take a step back. Think. Process. Then take a break and read it again tomorrow.

Slow down. Don't get distracted. You don't need to respond so fast. Take your time. There is no rush. There is no shortcut. Read it in full and you'll understand this comment says much more.

twodave•1h ago
It’s not very accurate. Maybe because of the camera fidelity. It was about 10bpm lower than actual for me. Seems to operate off of subtle motions caused by pulse. It was even worse at detecting breathing.
abakker•58m ago
It registered in the low 40s for me, while my watch was saying 72-75. I guess YMMV
jmusall•51m ago
May be related: Explanation of motion and color amplification in video by Steve Mould https://youtube.com/watch?v=rEoc0YoALt0

He even shows pulse detection (around 8:30).

trothamel•4m ago
There's a version of this built into the Google Fit application for Android.

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Show HN: A weird thing that detects your pulse from the browser video

https://pulsefeedback.io/
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