220799 2021-01-21 08:35:13 -0800 getUserMedia in STP 118 returns NotReadableError 2021-01-24 23:50:23 -0800 1 1 1 Unclassified WebKit WebRTC Safari Technology Preview Mac (Intel) macOS 10.15 RESOLVED DUPLICATE 219802 InRadar P2 Normal --- 1 ssim webkit-unassigned bfulgham daginge eric.carlson pvollan smoley webkit-bug-importer youennf oldest_to_newest 1721173 0 ssim 2021-01-21 08:35:13 -0800 After upgrading STP to 118, getUserMedia asks for permissions and then consistently returns "NotReadableError: The I/O read operation failed." Steps to reproduce 1. Use STP 118 on Catalina or Big Sur 2. Go to https://webrtc.github.io/samples/src/content/getusermedia/gum/ 3. Click "Open Camera" Happens 100% of the time gUM for audio returns a MediaStream, but for video we get the error 1721465 1 smoley 2021-01-21 19:49:32 -0800 I can reproduce this on macOS Catalina 10.15.7 (19H15) with STP118, but this does not reproduce on the latest developer beta of macOS Big Sur 11.2 RC (20D53) with STP118. 1721466 2 webkit-bug-importer 2021-01-21 19:49:43 -0800 <rdar://problem/73481217> 1721761 3 pvollan 2021-01-22 16:05:11 -0800 *** This bug has been marked as a duplicate of bug 219802 ***