QVideoWidget and QMedia Player - Problem with showing video (Screen stays blank)

[hrathod]

Using Qt5 and Running under Kubntu in Oracle VM Ware.

Hello,

I am trying to run and show a video in a simple example for further use.
Have tried both showing it in QGraphics view and latest to make is simple trying to add that in Horizontal layout.

The code runs and applicaiton output is as below:
@
" libGL error: pci id for fd 9: 80ee:beef, driver (null)
libGL error: core dri or dri2 extension not found
libGL error: failed to load driver: vboxvideo
QMediaPlayer::PlayingState
"
@

It doesn't run a video. Screen stays black/blank.

CAN ANYONE FIGURE OUT WHAT COULD BE WRONG HERE. WHY IT IS NOT SHOWING VIDEO.
AND ANY SUGGESTION ON TRYING OTHER SOLUTIONS WOULD BE WELCOME>

My code is as below:

@@@@
#include "application.h"
#include "ui_application.h"

#include <QtMultimedia/QMediaPlayer>
#include <QtMultimediaWidgets/QVideoWidget>

#include <QDebug>

Application::Application(QWidget *parent) :
QWidget(parent),
ui(new Ui::Application)
{
ui->setupUi(this);

// ADD USER CODE HERE

QMediaPlayer* player = new QMediaPlayer;
QVideoWidget* vw = new QVideoWidget;

ui->horizontalLayout->addWidget(vw);


player->setVideoOutput(vw);
player->setMedia(QUrl::fromLocalFile("/home/ccs/qt/MyProjects/VideoPlayTest/Multimedia/Shaktimanmpgvideo.mpg"));


vw->setGeometry(0,0,800,480);
vw->show();


player->play();

qDebug() << player->state();

}

Application::~Application()
{
delete ui;
}

@@@@

Output Screen looks like image attached:

[SGaist]

Hi,

VM Ware or Virtual Box ?

If the later, did you install the Guest Additions on the machine ?
Can you run something like glxgears successfully ?
Did you enabled 3D acceleration ?

@hrathod said in QVideoWidget and QMedia Player - Problem with showing video (Screen stays blank):

CAN ANYONE FIGURE OUT WHAT COULD BE WRONG HERE. WHY IT IS NOT SHOWING VIDEO.
AND ANY SUGGESTION ON TRYING OTHER SOLUTIONS WOULD BE WELCOME>

Please refrain from writing such all caps sentences. In written language it's considered shouting and rude.

[hrathod]

Hello SGaist,

Thank you first of all for the reply and suggestions.

It is Oracle VM Virtual Box Manager.
3D Acceleration was not enabled. Now enabled.
And yes there is a guest addition installed. Adding two pictures for reference.

Wasn't knowing about all Caps things. It was just an attempt to separate a request from the code and description. Will keep in mind for future use.

After enabling 3d acceleration, did try again running below code. Still it is blank, but now there are some list of warnings which are pasted after the code.

@@@
#include "application.h"
#include "ui_application.h"

#include <QtMultimedia/QMediaPlayer>
#include <QtMultimediaWidgets/QVideoWidget>

#include <QDebug>

Application::Application(QWidget *parent) :
QWidget(parent),
ui(new Ui::Application)
{
ui->setupUi(this);

// ADD USER CODE HERE

QMediaPlayer* player = new QMediaPlayer;
QVideoWidget* vw = new QVideoWidget;

player->setVideoOutput(vw);
player->setMedia(QUrl::fromLocalFile("/home/ccs/qt/MyProjects/VideoPlayTest/Multimedia/Shaktimanmpgvideo.mpg"));


vw->setGeometry(0,0,800,480);
vw->show();


player->play();

qDebug() << player->state();

}

Application::~Application()
{
delete ui;
}

@@@

// Application output as below
Starting /home/ccs/qt/MyProjects/build-VideoPlayTest-Virtual_Development_Qt5-Debug/VideoPlayTest...
libGL error: pci id for fd 9: 80ee:beef, driver (null)
OpenGL Warning: glFlushVertexArrayRangeNV not found in mesa table
OpenGL Warning: glVertexArrayRangeNV not found in mesa table
OpenGL Warning: glCombinerInputNV not found in mesa table
OpenGL Warning: glCombinerOutputNV not found in mesa table
OpenGL Warning: glCombinerParameterfNV not found in mesa table
OpenGL Warning: glCombinerParameterfvNV not found in mesa table
OpenGL Warning: glCombinerParameteriNV not found in mesa table
OpenGL Warning: glCombinerParameterivNV not found in mesa table
OpenGL Warning: glFinalCombinerInputNV not found in mesa table
OpenGL Warning: glGetCombinerInputParameterfvNV not found in mesa table
OpenGL Warning: glGetCombinerInputParameterivNV not found in mesa table
OpenGL Warning: glGetCombinerOutputParameterfvNV not found in mesa table
OpenGL Warning: glGetCombinerOutputParameterivNV not found in mesa table
OpenGL Warning: glGetFinalCombinerInputParameterfvNV not found in mesa table
OpenGL Warning: glGetFinalCombinerInputParameterivNV not found in mesa table
OpenGL Warning: glDeleteFencesNV not found in mesa table
OpenGL Warning: glFinishFenceNV not found in mesa table
OpenGL Warning: glGenFencesNV not found in mesa table
OpenGL Warning: glGetFenceivNV not found in mesa table
OpenGL Warning: glIsFenceNV not found in mesa table
OpenGL Warning: glSetFenceNV not found in mesa table
OpenGL Warning: glTestFenceNV not found in mesa table
libGL error: core dri or dri2 extension not found
libGL error: failed to load driver: vboxvideo
OpenGL Warning: XGetVisualInfo returned 0 visuals for 09612668
OpenGL Warning: Retry with 0x8002 returned 0 visuals
OpenGL Warning: XGetVisualInfo returned 0 visuals for 09612668
OpenGL Warning: Retry with 0x8002 returned 0 visuals
OpenGL Warning: glXGetFBConfigAttrib for 09612668, failed to get XVisualInfo
OpenGL Warning: XGetVisualInfo returned 0 visuals for 09612668
OpenGL Warning: Retry with 0x8002 returned 0 visuals
OpenGL Warning: glXGetFBConfigAttrib for 09612668, failed to get XVisualInfo
OpenGL Warning: XGetVisualInfo returned 0 visuals for 09612668
OpenGL Warning: Retry with 0x8002 returned 0 visuals
OpenGL Warning: glXGetFBConfigAttrib for 09612668, failed to get XVisualInfo
OpenGL Warning: XGetVisualInfo returned 0 visuals for 09612668
OpenGL Warning: Retry with 0x8002 returned 0 visuals
OpenGL Warning: glXGetFBConfigAttrib for 09612668, failed to get XVisualInfo
OpenGL Warning: XGetVisualInfo returned 0 visuals for 09612668
OpenGL Warning: Retry with 0x8002 returned 0 visuals
OpenGL Warning: glXGetFBConfigAttrib for 09612668, failed to get XVisualInfo
OpenGL Warning: XGetVisualInfo returned 0 visuals for 09612668
OpenGL Warning: Retry with 0x8002 returned 0 visuals
OpenGL Warning: glXGetFBConfigAttrib for 09612668, failed to get XVisualInfo
OpenGL Warning: XGetVisualInfo returned 0 visuals for 09612668
OpenGL Warning: Retry with 0x8002 returned 0 visuals
OpenGL Warning: glXGetFBConfigAttrib for 09612668, failed to get XVisualInfo
OpenGL Warning: XGetVisualInfo returned 0 visuals for 09612668
OpenGL Warning: Retry with 0x8002 returned 0 visuals
OpenGL Warning: glXGetFBConfigAttrib for 09612668, failed to get XVisualInfo
QMediaPlayer::PlayingState

[jsulm]

@hrathod Can you play same video with a player like VLC?

[hrathod]

@jsulm
Yes, I am able to play video in VLC in windows and also in Linux.

[SGaist]

Can you try one of Qt's OpenGL example ?

By the way, to include code you can use three backticks before and after the code or the </> button to start adding code.

[hrathod]

@SGaist
Hello,

Yes even tried OpenGL example.

I guess there are some drivers problem or missing supporting set up.
Unable to figure that out still. Tried installing and updating some drivers.

However, for now have done this with an alternative by converting video to GIF and running GIF in label.

Thanks for your time on supporting this.

**
By the way, to include code you can use three backticks before and after the code or the </> button to start adding code.

Noted. For next posts will keep this in mind.

Hardik Rathod

[SGaist]

Which version of VirtualBox are you using ?