No idea if this feedback mailing list is monitored anymore but I'll give
it one more try before I give up on it completely.
I've installed the above preview API's & I have successfully got the
QtMobility player example working & playing media files. When I try the
Qml declarative Video element I get nothing. Looking at the Qml
Inspector I see hasVideo is false.
So having looked at the code of the plugin I can see that this comes
from QMediaPlayerControl::isVideoAvailable(). The
QDeclarativeMediaBasePlayerControl default is false and the
QMediaPlayerControl gets this from the serviceRequest. The player
example is in essence using the same media classes in much the same way.
So why the difference loading the backend?
Having not seen any conclusive difference in the code of the declarative
plugin & the player example I tried to build a debug build of the
declarative plugin & tried to run it up using qmlviewer. This fails
with:
plugin cannot be loaded for module "Qt.multimedia": The plugin
'C:/Qt/4.7.0-beta2/imports/Qt/multimedia/declarative_multimedia.dll'
uses incompatible Qt library. Expected build key "Windows msvc release
full-config", got "Windows msvc debug full-config"
import Qt.multimedia 1.0
How can I debug the decalarative plugin? How do I find out why the
backend won't load from the Qml.
I've seen several people raise the same problem but only responses like
it's a backend device issue or did you remember the line "import
Qt.multimedia 1.0". I want to know how to track which media service
backend is loading & when it fails why. Does anyone know?
Regards
David Robinsion
________________________________
From: [email protected]
[mailto:[email protected]] On Behalf Of
Robinson, David
Sent: 13 July 2010 17:44
To: [email protected]
Subject: Re: [Qt4-preview-feedback] Qt 4.7.0-beta2 and Phonon backend
onWindowsXP SP3
The Phonon backend in Qt 4.7.0 beta2 on Windows XP SP3 does not work for
me. I copied the beta1 components into the beta2 bin and Phonon playback
was restored.
Similarly the Phonon Qml problems went away when using the beta2
qmlviewer as opposed to the QtCreater 2.0.80 qmlviewer exe.
I'm still trying to get the Qml Video Element working. The multimediakit
libs & plugins built and installed OK. The player example works but in
the Qml engine the Video element source loaded but hasVideo() is false,
so it won't display. Does anyone know how to resolve this?
Regards
David Robinsion
________________________________
From: [email protected]
[mailto:[email protected]] On Behalf Of
Robinson, David
Sent: 12 July 2010 12:28
To: [email protected]
Subject: [Qt4-preview-feedback] Qt 4.7.0-beta2 and Phonon backend on
WindowsXP SP3
The Phonon backend appears to not work in the Qt 4.7.0 beta2 pre
release. I tried to rebuild the module & even the full release over the
weekend but this had no effect. It is still not possible to play any
media using the qmediaplayer demo, the controls all work as expected but
the window simply does not size and paint correctly.
If I just modify my path to use the Qt 4.7.0 beta1 components, the
qmediaplayer demo in the beta2 release folder works correctly. What is
the problem with the Phonon backend and how can I fix it?
Similarly I cannot get any QML that uses phonon video to play anymore,
when this worked before in the beta1.
I have tried using the Qt Mobility API, multimedia 1.0.1, Video QML
element but this shows only a black background. Has anyone got this
working?
Regards
David Robinsion
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