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QT painter - tear issue.



  • I have inherited the qtopengl - then the image in opencv Mat array is converted in to Q image,
    then using QPainter i just painted the frames from the camera -
    the tear issue is comming in the video .
    when i save the video or the image its fine.
    when i use imshow in opencv for display and the adjusting the force composition pipeline on the tear is not coming but the same thing not working in the QPainter disaplay ,

    f.i: the video from the camera rendering in 60 frames per second.


  • Qt Champions 2017

    You have reimplemented paintEvent(...) to show the images. Apart from drawing image what else are you doing inside the paintEvent(..) function ? Is there some operation inside the function taking time ?


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