[Qt-interest] Errors building phonon_backend on Qt 4.7.1, Windows 7, VC 2008

[Darryl Hunter]

Hi all,

 

I've just spent the last day trying to work out a problem I've been having.
I think I've isolated it, so thought I'd post this in the hopes that either
somebody can tell me what stuipd thing I've done wrong, or it saves somebody
else the same heartache I've just gone though!

 

So, I just built a brand new Windows 7 machine, Visual Studio 2008
Professional, and Qt 4.7.1 Open Source.  I then built my project (that I've
been developing since Qt 4.3.4).  Everything worked OK on my development
machine, so it was time to test deployment, which is a Windows XP machine.

 

Everything seemed to run OK, except for Phonon - nothing was being shown at
all, however it was working fine with Qt 4.6.3 (which is what *was* on the
deployment machine before).  So I know it's not a codec problem, etc.

 

After trying numerous things, and going round in circles for hours,
something made me try using the old phonon_ds94.dll that was build with Qt
4.6.3 (while everything else was the 4.7.1 version), and hey, presto, things
worked again!

 

I did a make clean in src/plugins/phonon, and a make again, but copying that
DLL over still didn't work.  No errors or warnings during the compilation.

 

I installed the DirectX Redistributables and this didn't change anything
either.

 

If you're interested, my configure command was:

configure.exe -debug-and-release -fast -rtti -stl -qt-sql-mysql -no-dsp
-qt-gif -qt-libtiff -qt-libjpeg -no-qt3support -phonon -phonon-backend
-webkit -I "d:\MySQL\5.1\include" -L "d:\MySQL\5.1\lib\opt" -l mysql >
CONFIGURE.OUT 2>&1

 

All I can do is put it down to a hardware issue on my test machine - it's
spec'd differently to my development machine so maybe it just can't handle
the rendering with the phonon_ds94.dll build with 4.7.1?

 

I'd be interested to know if anybody else has experienced similar
difficulties, and if so, what they did to fix it.

 

Darryl

 

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