[SOLVED]Vlc-Qt problem!

SGaist

Hi and welcome to devnet,

You need to build VLC-Qt before using it, you can't just copy the sources in your project.

Yacinoben

Ah ok,
I tried to build a simple class juste for a test, but no result, i do not know where and how to start .

SGaist

Did you build VLC-Qt itself ?

Yacinoben

It's my fault, i downloaded the VLC-QT of other personne. else now i download the official version in http://vlc-qt.tano.si/
If I have a problem I will tell you .

Yacinoben

I wanted to try a reading, but this code doesn't work ;

#ifndef VIDEO_H
#define VIDEO_H
#include <QMainWindow>
#include <vlc/VLCQtCore/Instance.h>
#include <vlc/VLCQtCore/MediaPlayer.h>
#include <vlc/VLCQtCore/Media.h>
#include <vlc/VLCQtCore/Common.h>
#include <vlc/VLCQtWidgets/WidgetVideo.h>
class Video : public QMainWindow
{
Q_OBJECT
public:
explicit Video(QWidget *parent = 0);

public slots:
void player();
private :
VlcMedia * _media;
VlcInstance* _instance;
VlcMediaPlayer* _player;
VlcWidgetVideo * widget;
};
#endif // VIDEO_H

.cpp

#include "video.h"

Video::Video(QWidget *parent) : QMainWindow(parent)
{
QPushButton *buttonPlayer=new QPushButton("play",this);
QVBoxLayout *layout=new QVBoxLayout(this);
_instance = new VlcInstance(VlcCommon::args(), this);
_player = new VlcMediaPlayer(_instance);
widget=new VlcWidgetVideo(_player);
_player->setVideoWidget(widget);
layout->addWidget(buttonPlayer);
layout->addWidget(widget);
setLayout(layout);

connect(buttonPlayer, SIGNAL(clicked()), this, SLOT(player()));

}
void Video::player()
{
QString file =
QFileDialog::getOpenFileName(this, tr("Open file"),
QDir::homePath(),
tr("Multimedia files(*)"));

if (file.isEmpty())
    return;
_media = new VlcMedia(file, true, _instance);
_player->open(_media);

}
I have this message
QLayout: Attempting to add QLayout "" to Video "", which already has a layout
[02cb4df4] core libvlc error: No plugins found! Check your VLC installation.
core libvlc error: No plugins found! Check your VLC installation.
VLC-Qt Error: libvlc failed to load!

http://i45.tinypic.com/dzb138.png
I downloaded version for MinGW

SGaist

QMainWindow has already a layout, don't set a new one. Use a placeholder widget that you'll set as central widget of your QMainWindow.

Yacinoben

Video::Video(QWidget parent) : QMainWindow(parent), _media(0)
{
QWidgetzoneCentrale = new QWidget;
QVBoxLayout *layout=new QVBoxLayout(this);

QPushButton *buttonPlayer=new QPushButton("play",this);

_instance = new VlcInstance(VlcCommon::args(), this);
_player = new VlcMediaPlayer(_instance);
widget=new VlcWidgetVideo(_player,this);

_player->setVideoWidget(widget);
widget->setMediaPlayer(_player);

layout->addWidget(widget);
layout->addWidget(buttonPlayer);
zoneCentrale->setLayout(layout);

setCentralWidget(zoneCentrale);

connect(buttonPlayer, SIGNAL(clicked()), this, SLOT(player()));

}

Doesn't work,still same error

ps ; even if I use QWidget in place of QMainWindows , I still get the same error

SGaist

QVBoxLayout *layout=new QVBoxLayout(this); will set the layout on this which is not what you want in this case.

QVBoxLayout *layout=new QVBoxLayout(zoneCentrale); will set the layout on the zoneCentrale

Yacinoben

Still same error :'(, i don't know anymore

SGaist

The layout problem ?

Yacinoben

When i launch the program , i have this message http://fr.tinypic.com/view.php?pic=dzb138&s=6#.Vhg6sHrtlBc

and error ;
core libvlc error: No plugins found! Check your VLC installation.
[03126584] core libvlc error: No plugins found! Check your VLC installation.
VLC-Qt Error: libvlc failed to load!

I test this condition

QLibrary lib( "libvlc" );
if ( lib.load() )
{
qDebug() << "libvlc loaded";
}
else
{
qDebug() << "libvlc not loaded";
}
she return always true

SGaist

Try setting VLC_PLUGIN_PATH in your application environment variables (Run part of the project panel in Qt Creator)

Yacinoben

it works, I added the folder plu gin in release !!! i"m very happy :')

SGaist

Good :)

Then since you have it working now please update the thread title prepending [solved] so other forum users may know a solution has been found :)

vince16

Hi everybody, when I launch my program from Qt Creator all is OK.
But when I run exec file directly from windows explorer no HMI appears. I use dependency walker to see what is wring and I have got the same message :
GetProcAddress(0x76190000 [GDI32.DLL], "GetCharWidthI") called from "QWINDOWS.DLL" at address 0x520D4FAA and returned 0x761C8EB6.
GetProcAddress(0x76060000 [MSVCRT.DLL], "_get_output_format") called from "LIBVLCCORE.DLL" at address 0x5042A5E4 and returned 0x760D5CE8.
core libvlc error: No plugins found! Check your VLC installation.
VLC-Qt Error: libvlc failed to load!
Second chance exception 0xC0000005 (Access Violation) occurred in "LIBVLC.DLL" at address 0x5238D481.
Exited "TESTVIDEO.EXE" (process 0xE44) with code -1073741819 (0xC0000005).

Have you got an idea? I saw in last topic that I need to add environnement variable VLC_PLUGIN_PATH. Where is the plugin path? Does I need to install VLC. I only install QtVlc with the 3 folders, bin, include et lib.

Regards