I am building QtWebEngine with the following flags: no-webrtc, proprietary-codecs. The build goes fine until around [12574/17260] where I get the following error (pastebin):
After googling I came across this: https://bugs.chromium.org/p/chromium/issues/detail?id=667527
I then made the fix to the respective file: https://codereview.chromium.org/2522663003/diff/1/content/renderer/pepper/pepper_media_device_manager.cc
and then I re-ran jom and it passed the problem, and is now continuing on the build just fine.