[KDE/Mac] phonon vs qtmultimedia

Jeremy Whiting jpwhiting at kde.org
Wed Jan 14 21:35:10 UTC 2015

On Tue, Jan 13, 2015 at 3:02 AM, René J.V. <rjvbertin at gmail.com> wrote:

> On Monday January 12 2015 17:49:09 Jeremy Whiting wrote:
> >1. How do I build qt5 with the multimedia bits it needs to work? I don't
> >see anything multimedia specific in configure --help output besides
> >-no-pulseaudio. Is there some specific QtMultimedia backend I need to
> >enable somehow for sound to work.
> My guess is no, it'll pick up CoreAudio and/or AVFoundation, QuickTime if
> you're building for 32 bit and I saw QTKit in the configure summary.
> On a more general multimedia note, I tried to do the video grabbing thing
> in QMLViewer, which apparently tries to use ffmpeg with at least 1 option
> that's no longer supported ...
> >2. Is phonon usable on OS X with qt5? phonon itself builds now, but
> >phonon-vlc needed a small change to build and crashes when trying to use
> >it. phonon-quicktime is in unmaintained. Is there a working phonon backend
> >for osx?
> I can't speak for qt5 (yet), but the phonon backend for qt4 builds as does
> phonon-backend-gstreamer (port search phonon is your friend). QtConfig was
> never very clear about whether they were detected/functional though.
> KDE4 applications are a mixed bunch as far as sound output goes. Some are
> mute (last time I tried I had to use an external play command to get sound
> notifications in kmail), some work. I'd not be surprised if the former
> expect phonon and the latter use whatever OS defaults Qt provides.
> A counter question: what phonon version are you using again that builds
> against Qt5? I have a local upgraded port for Phonon and
> phonon-backend-gstreamer 4.8.0 which I think I submitted to trac, in case
> that helps you.

I'm using phonon4qt5 built from git with kdesrc-build. I've fixed
phonon-vlc to build on mac and have tried that but it crashes with an
assertion in QList :*) I'll try gstreamer from macports and
phonon-gstreamer from git next.

> R.
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