Issues witih building code using QtMEL

[zWaR]

Hi,

I'm trying to write a simple application on windows, based on the provided examples.

Here's the code: mainwindow.h is basically a copy paste of the mainwindow.h povided with the CameraExample with all except the default includes in it.

mainwindow.cpp

include "mainwindow.h"

include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) , m_cameraGrabber(new CameraGrabber(this)) { ui->setupUi(this); }

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

As soon as I add a call to CameraGrabber(), the code builds, but crashes at execution.

The .pro file is prepared as directed here http://kibsoft.ru/. I tried to point INCLUDEPATH and LIBS to the precompiled qtmel and to localy compiled qtmel, but same results.

And I'm using mingw as the compiler.

Since I ran out of ideas, I'd appreciate any suggestions.

Thanks!

[zWaR]

btw.: same results if adding AudioGrabber or Recorder ....

[kibsoft]

Does CameraExample work for you?

[kibsoft]

Btw, seems that you should put ffmpeg, opencv libs near qtmel.dll. And maybe put all needed dlls near you .exe file.

[zWaR]

The prebuilt one works perfectly, if i try to build it myself, then it crashes as with my simple example.

OK, will try to play with the dlls more...

[fathonyfath]

Hi, I got same problem, the build success, but it unexpectedly finished when I tried to run it. It also happen to CameraExample.

I'm using VC2010 compiler and the prebuilt lib that you post in : http://qt-project.org/forums/viewthread/29117

Thanks

[kibsoft]

Hello, ffmpeg and opencv dlls are near exe file?

[fathonyfath]

It's working, but the frame doesn't show any picture. And when I tried to run it from explorer, it doesn't show any available device.

Thanks.

[kibsoft]

Maybe it can't find QtMultimedia. As far as I remember when it can't find QtMultimedia it doesn't crash but just doesn't do anything. It can be a reason why you don't see available devices. To be honest, opencv+ffmpeg is like a "gas mixture", nobody can foresee what will happen in next moment. The app may be crashed without any reason. That's why I don't want to continue work on QtMEL :(

[fathonyfath]

nah, I actually just wanted to use camera module, but QtMultimedia don't let me record video from webcam. So, I came across and found your library. It's great, but now it's not working :(