Sorry if this is not the right forum, but this question seems not to fit any other forum either...

I'm using portaudio to get cross-platform sound recording in my Qt-based project. It makes things complex (esp. for deployment) but ... phonon won't have even basic sound-recording anytime soon.

Now, the September post on Qt Labs Blog http://labs.trolltech.com/blogs/2009/09/03/multimedia/ raised my hopes: it seemed there was a working Qt solution for basic sound recording! OK, so I downloaded and compiled the Qt 4.6.0 Tech Preview 1, cloned the qt-mobility/multimedia git repository and compiled - seemingly without problems.

But I cannot run the examples, except for the slideshow example. For example, running "./recorder" (obviously - the example I wanted to try first ) ends up with

Qt Code: 
  1. QMediaProviderFactory::defaultServiceProvider(): no plugin found for - "mediarecorder"
  2. ASSERT: "d->service != 0" in file qmediarecorder.cpp, line 199
  3. Aborted
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Obviously, I'm missing something badly. Any ideas what could this be?

One thing I tried (but did not lead anywhere closer to a success) was the flollowing: the qt-mobility/multimedia git repository does have a plugins subfolder with .pro with TEMPLATE = subdirs, and a subfolder audiocapture, and ... empty SUBDIRS in .pro! But changing
Qt Code: 
  1. SUBDIRS =
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to
Qt Code: 
  1. SUBDIRS = audiocapture
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leads to:
Qt Code: 
  1. audioencodecontrol.h:4:33: error: qaudioencodecontrol.h: No such file or directory
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Now, this seemed at first that this should be qaudioencodeRcontrol.h (with extra "r") from the Qt4.6tp1 tree, but this "encodecontrol" (without "r") is all over the plugins/audiocapture/, so changing this without understanding how things should work seemed too far fetched.

Has anyone managed to make this multimedia package work with Qt4.6tp1?

Does anyone know any wiki/discussion forum for QtMobility/Multimedia where I could turn for support? (http://labs.trolltech.com/page/Projects/QtMobility does not give any such info, nor do any readme/doc files in qt-mobility/multimedia git repository)

Best,
~Marek

PS: doing the same what I did for qt-mobility/location (instead of qt-mobility/multimedia) works like a charm: I just cloned the git repository, compiled, and I was able to run "fetchgooglemaps" (the Google Maps example) without any problems. And as I wrote, the slideshow example from qt-mobility/multimedia also works. So it seems not to be a problem with "mobility" vs. regular Qt, there is something specific what I'm missing-slash-doing-wrong for sound...

PPS: probably not important but: I tried the above on linux 2.6.27.29, no sound problems otherwise (alsa & oss etc.)