Phonon::VideoWidget embedded inside a QGraphicsProxyWidget

[Emdek]

On 27-03-2010 at 10:14:36 Andreas Marschke <xxtjaxx at googlemail.com> wrote:
> Am Samstag 27 März 2010 09:38:55 schrieb Emdek:
>> On 27-03-2010 at 06:06:35 Andreas Marschke <xxtjaxx at googlemail.com>  
>> wrote:
>> > Am Freitag 26 März 2010 20:48:35 schrieb Emdek:
>> >> On 26-03-2010 at 19:03:57 Alessandro Diaferia <alediaferia at gmail.com>
>> >>
>> >> wrote:
>> >> > As you currently may be aware of, embedding a Phonon::VideoWidget
>> >>
>> >> inside
>> >>
>> >> > a
>> >> > QGraphicsProxyWidget causes the video appealing awfully while  
>> playing.
>> >> > I've
>> >> > been bouncing here and there on IRC talking with Lucas Murray from
>> >>
>> >> KWin
>> >>
>> >> > and
>> >> > Mark Kretschmann from Phonon.
>> >>
>> >> Someone tried this class from Qt 4.7?
>> >> http://doc.qt.nokia.com/4.7-snapshot/qgraphicsvideoitem.html
>> >>
>> >> Maybe this will be best solution (when 4.7 will be released)?
>> >
>> > This seems to be for QtMultimedia framework that is now shipped with  
>> Qt
>> > since
>> > 4.6(?). But this here is more for the phonon side of things thus maybe
>> > not
>> > usable in conjunction right?
>>
>> Yes, this is part of QtMultimedia, new multimedia API that (as far as I
>> know) meant to replace Phonon in Qt (will be dropped with Qt 5.0 or
>> something).
>> Phonon in Qt will be only maintained, not developed.
>> There was somewhere post on labs or somewhere about this...
>>
>> Is this a big problem to use it in at least Plasma ()if works as it
>> should) if Phonon will be not supported anymore in Qt, only on KDE side
>> (and who knows what will happen later, I've not seen any comments from  
>> KDE
>> side about "killing" Phonon in Qt)?
>> If it is usable then I think that it's better to wait for stable release
>> and simply use it than reimplementing it (it is very bad for having two
>> APIs for one thing...).
>> Maybe it's better to work on something else than possibly wasting time?
>
> A nice thing aswell would have been if we were asked before starting to
> shoehorn something different into it aswell. Also how does QtMultimedia
> actually work internally with all the different AudioSystems on  
> Win/Lin/Mac?

Here are some details from labs:
http://labs.trolltech.com/blogs/2009/09/09/multimedia-in-qt-whats-the-story/

I guess that it will use the same libs as official backends in Qt (plus  
some for new platforms).


> Was there a discussion at all about wether we need a second Multimedia
> Framework in Qt at all?

When searching for that post I've found some discussions on different  
mailing lists.
I think that some apps will move away from Phonon, like Kaffeine  
recently...

And I personally know that in case of GV (so also Plasma) only one backend  
supports drawing video on widget and as far as I remember (I've asked on  
Phonon list) it's done in ugly and inefficient way (copying each frame as  
pixmap, or something).
So if that new API will allow to display video on GV as it should then  
I'll use it in my own applet (currently stuck with Phonon...).


Best regards,
Michal