Qt6 porting guidance: QCamera and QAbstractVideoSurface

[davecotter]

it seems that the replacement for QAbstractVideoSurface is QVideoSink, but there's lost functionality..

for example, my media app can take a single cam input and multiplex-route it to multiple QGraphicsScenes (via a QGraphicsVideoItems) in different windows. note this is multiple separate scenes, not the same scene in each view)

in qt5 i did this by subclassing QAbstractVideoSurface, instantiate one and call camera->setViewFinder() with it.
there is no setViewFinder() any more. ?? how do we ... do that now?

in the subclass i would be overriding supportedPixelFormats() to supply the available format(s)
but that function no longer exists?

then i would override present() to send the new frame off to each scene with a QGraphicsVideoItem in it, but the present() function is gone too?

it does have newVideoFrame(), but that function isn't virtual, so i can't override it.

how shall i accomplish this?

-dave

[davecotter]

i was able to solve it with instantiating a QVideoSink and setting that as the output, and hooking into the videoFrameChanged signal. i keep a list of the videoSinks i want to send the frames to, and farm them out when i get the videoFrameChanged notify

[paulpv]

Did you ever solve this Frequently Unanswered Question (FUQ)?

[davecotter]

i was able to solve it with instantiating a QVideoSink and setting that as the output, and hooking into the videoFrameChanged signal. i keep a list of the videoSinks i want to send the frames to, and farm them out when i get the videoFrameChanged notify