> Sent: Friday, July 08, 2016 at 1:11 PM > From: "Giuseppe D'Angelo" <giuseppe.dang...@kdab.com> > To: interest@qt-project.org > Subject: Re: [Interest] Utilizing the GPU, how to start? > > Il 06/07/2016 18:19, Jason H ha scritto: > > > What others have not said: > > I did extensive testing of Qt Quick1 with video playback. > > This is a chapter on its own. (By the way, Qt Quick 1 is still > widget-based...) > > In case of video playback, there's much more going on than using the GPU > for displaying the video. You want to use the GPU also to decode the > video stream (using whatever native APIs you have on your system) and, > in order to display it, it's not guaranteed at all the using OpenGL is > actually the best way. > > Other overlaying solutions are usually much, much better > performance-wise (e.g. VDPAU). But: they don't allow you to embed the > video in arbitrary UI hierarchies. Media players usually have very > complex setups in order to be able to switch between presentation > backends when f.i. you set a videoplayer full screen rather than windowed.
I'm not sure if I am agreeing or conflicting with you, but Anything that can't be overlaid today is going to be an issue. You might get minimal CPU on a direct render situation, but that's a horrible approach I hope does with the old DirectX backends. I much more value the ability to embed video in arbitrary hierarchies with alpha-blended overlays. _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
