TypeError navigator.mediaDevices is undefined, at shimGetUserMedia

[PavMel]

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Please use discuss-webrtc for general technical discussions and questions.

• [x] I have provided steps to reproduce (e.g. a link to a jsfiddle)
• [x] I have provided browser name, version and adapter.js version
• [x] This issue only happens when adapter.js is used

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Versions affected

Browser name: Chrome Version:75.0.3770 and others, probably spoofed

adapter.js 7.5.0

Description

TypeError navigator.mediaDevices is undefined I using sentry for handling errors:

Steps to reproduce

Is happened on real traffic

Expected results

No errors

Actual results

TypeError navigator.mediaDevices is undefined Script stopped working because import error

import adapter from "webrtc-adapter" 
import "detectrtc"                                 // <== other lib

[fippo]

src/js/firefox/getusermedia.js:    const nativeGetUserMedia = navigator.mediaDevices.getUserMedia.

is the only nativeGetUserMedia I see so its probably spoofing combined with some kind of privacy extension. @jan-ivar wanna take a stab?

[jan-ivar]

navigator.mediaDevices is undefined in http. Could that be it?

[fippo]

I checked http and there adapters browser detection for Firefox is broken even. Whoops... relies on mozGetUserMedia. Maybe better to rely on mozRTCPeerConnection instead?

[fippo]

I think shimGetUserMedia should simply check for mediaDevices in navigator and if its not there return.

[fippo]

oh hold on. The error is inside this block:

  if (!(browserDetails.version > 55 &&
      'autoGainControl' in navigator.mediaDevices.getSupportedConstraints())) {

so how can it throw?

[jan-ivar]

browserDetails.version > 55 is presumably true, and undefined.getSupportedConstraints is a TypeError?

[jan-ivar]

relies on mozGetUserMedia. Maybe better to rely on mozRTCPeerConnection instead?

No, we're likely to deprecate mozRTCPeerConnection before we deprecate mozGetUserMedia.

They may both go away eventually though.

[Mazuh]

I was having this error due to my app being exposed on HTTP (instead of HTTPS). Does someone agree that we should polyfill this with Promise rejections? Or is it too much out of scope? :thinking: Just having it undefined is weird!

[fippo]

that would break feature detection - if it was a good idea then the browser vendors would have done it.

[jan-ivar]

Yes, this is intentional for feature detection. In fact on Android, Firefox and Chrome are going the other way: leaving it undefined even in https, to not signal support on those platforms when there is none.

[ankushswoopos7]

Unable to connect to Room: getUserMedia is not supported whenever i am running in http://192.168.0.56:8000/ (local IP)

[fippo]

getUserMedia has not been supported on HTTP for a while with the exception of localhost since 2015: https://developers.google.com/web/updates/2015/10/chrome-47-webrtc?hl=en

[benja-M-1]

I don't user adapter.js. However, I stumbled uppon this issue while googling about a similar issue I have and I can't figure out why this happens (I don't expect you to solve mine, I just provide some information that seems useful for you). undefined is not an object (evaluating 'navigator.mediaDevices.enumerateDevices')

I am 100% sure that it happens on https URL as we only serve https. Here is the list of the user agents for which the error happened

• mac OS 1.15
  • Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Safari/605.1.15
• iPad
  • Mozilla/5.0 (iPad; CPU OS 9_3_5 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13G36 Safari/601.1
  • Mozilla/5.0 (iPad; CPU OS 12_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.163 Mobile/15E148 Safari/604.1
  • Mozilla/5.0 (iPad; CPU OS 13_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1
  • Mozilla/5.0 (iPad; CPU OS 13_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1
  • Mozilla/5.0 (iPad; CPU OS 14_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1
• iPhone
  • Mozilla/5.0 (iPhone; CPU iPhone OS 12_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.163 Mobile/15E148 Safari/604.1
  • Mozilla/5.0 (iPhone; CPU iPhone OS 13_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/90.0.4430.78 Mobile/15E148 Safari/604.1
  • Mozilla/5.0 (iPhone; CPU iPhone OS 13_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1
  • Mozilla/5.0 (iPhone; CPU iPhone OS 13_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.163 Mobile/15E148 Safari/604.1
  • Mozilla/5.0 (iPhone; CPU iPhone OS 14_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.163 Mobile/15E148 Safari/604.1
  • Mozilla/5.0 (iPhone; CPU iPhone OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) GSA/137.2.345735309 Mobile/15E148 Safari/604.1

[fippo]

that sounds like chrome on ios which, being wkwebview-based didn't have getUserMedia. Check support before using it.

[benja-M-1]

Yes you are right sorry for the noise... and thank you very much for your answer