User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0

Steps to reproduce:

1. With a Safari on iPhone 8 iOS 14.6 and also with a Windows and Firefox computer, go to https://v3demo.mediasoup.org/?roomId=Firefox and start your webcams

2. On Windows / Firefox, accept the iPhone user's webcam, you will see that their webcam is rotated 90 ° or 180 °

Actual results:

The webcam is turned in the wrong direction. In my case at 90 °.
But for an iPad user, it was 180 °

Expected results:

The display of the remote user (it is under Iphone / Ipad) must be in the right direction

Can read more information about it at https://github.com/versatica/mediasoup/issues/577

Hi Testeur,
There are some bugs filed for RTP support, such as Bug 1648467 and other similar. Not particularly sure which one would the correct one to dupe after, but moving it over to WebRTC component so the developers can have a better opinion on this.
Thanks for the report!

This seems to be because we don't currently support the urn:3gpp:video-orientation RTP extension. But I also don't see the sdp for mediasoup attempting to negotiate that extension either. I'm going to dup this bug to Bug 1463697.