WebRTC `getUserMedia` api return stream swapped height and width randomly

Question

Minjie OP

Created Oct ’22

Replies 2

Boosts 1

Views 1.4k

Participants 3

Environment: iPhone 13/14, iOS 16, Chrome, Safari

Description: We use WebRTC api to stream camera to <video>. We did some business logics according to stream's width and height. But the height and width value swapped randomly.

Expected result: video stream height is always larger than width on portrait mode.

Actual result: video stream width height swapped randomly.

How to reproduce: 1.Visit on mobile https://yari-demos.prod.mdn.mozit.cloud/en-US/docs/Web/API/Media_Capture_and_Streams_API/Constraints/_sample_.Example_Constraint_exerciser.html

Click start button above "Requested video constraints:"
See the outputs in "Actual video settings":

"height" is larger than "width" in portrait mode

Repeat clicking start button and see the outputs multiple times.

You can see "height" will be smaller than "width"

Boost

Answer 1

iidevtech OP

Jan ’23

I am also suffering from the same problem. Have you found any good solutions?

1

Answer 2

sleber OP

Mar ’23

The Problem persists and breaks our video support solution. The behaviour appears to be deterministic when the stream and track is stopped before requesting a new one. Which is less than ideal since IOS takes a lot of time to re-request the same camera for some reason. Not sure if this should rather be reported to Safari. Here clearly nobody cares..

0