vlc-qt for Qt5 error

[freddy311082]

Hi peopple

I've the following code:

#include <QApplication>
#include <vlc-qt/Common.h>
#include <vlc-qt/Instance.h>
#include <vlc-qt/Media.h>
#include <vlc-qt/MediaPlayer.h>
#include <vlc-qt/WidgetVideo.h>
#include <QWidget>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);

QWidget* mainWidget = new QWidget();
mainWidget->setSizeIncrement(400,400);
VlcInstance* vlcInstance = new VlcInstance(VlcCommon::args(), NULL);


mainWidget->show();

return a.exec();
}

the application give a segmentation fault in the VlcInstance line and the message is this one:

QMetaType::registerType: Binary compatibility break -- Size mismatch for type 'QPaintBufferCacheEntry' [1024]. Previously registered size 16, now registering size 0.
The program has unexpectedly finished.

I had print the VlcCommon::args() to see what it has and this is the result:

--intf=dummy
--no-media-library
--no-plugins-cache
--no-stats
--no-osd
--no-loop
--no-video-title-show
--drop-late-frames

I'm using libvlc 2.1 and vlc-qt from it git repo

Am I have to add another parameter to solve my problem ??

best regards

freddy

[Rémi Denis-Courmont]

You need to build VLC against Qt5 (or without the Qt interface at all) to use LibVLC with Qt5. This is an unfortunate consequence of how Qt4 and Qt5 are linked.

[bernd_b]

What are the correct configure / make options to make sure that vlc is compiled against qt4 only? I always get a separate window when playing a video with a self compiled vlc. This was assumed to be the cause of a qt4/ qt5 mix up ( https://forum.videolan.org/viewtopic.ph ... 84#p393963

[Rémi Denis-Courmont]

At configure stage, VLC picks Qt5 if available, and falls back to Qt4 if not.