Can not display gstreamer inside widget qt

[zsabhi]

Greeting, 

In our IMX8mp based board we are using yocto image based on  wayland display server the board is linked to a LVDS screen where we want to display frames from our cameras with gstreamer .

As a first step our QT application is developed  to show a dummy video (the src comes from videotestsrc). whenever I try to launch the application in the board, it opens up an additional window where it stream the videotestsrc rather  than streaming it inside my widget. 

Any tips to how fix this problem ? 

Thanks 

Zsabhi

[zsabhi · Accepted solution]

Problem solved by adding the following instruction to my main.cpp :

• setenv("DISPLAY",":0",1);
• setenv("GDK_BACKEND","X11",1);
• setenv("QT_QPA_PLATFORM","xcb",1);