[Development] New Qt Multimedia

Jason H jhihn at gmx.com
Thu May 27 19:52:56 CEST 2021

> > If it matters: I disclaim any copyright for the attached files.<barcodevideoprobe.cpp><barcodevideoprobe.h>
> Thanks for the snippet. I think this should be perfectly doable. Connect to the signal, then map the QVideoFrame and copy out the Y channel.

One ask that may not be captured anywhere: currently, it is impossible to have a QML Camera and not start it.

If I could request,
1. a way to probe hardware without activating it
2. a way to have a QML Camera without getting frames from it, that is to set `active: false` is the default. Currently, there is not even active property. We have to do a Component.onCompleted: stop() which has already triggered the permission dialog. This was ok in the past, but the trend and proper usage is to request permission only when it is needed.

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