How to use QAbstractVideoFilter to process frames from camera

medyakovvit · wrote on 25 Sept 2015, 16:35

@cs_a994
OK. I f you have a questions about qml camera and filters, I will try to help you.

theshadowx · 28 Sept 2015, 12:33

@cs_a994

I have put a QtQuick app in github using QAbstractVideoFilter with OpenCV.

I hope it helps you.

Cheers

cs_a994 · wrote on 28 Sept 2015, 12:33

@theshadowx

Thank you very much. I'll study it soon. I hope it will help.

mikeitexpert · 1 Apr 2019, 23:21

@theshadowx

I get the below error if I try the canny code from git hub. (https://github.com/theshadowx/Qt_OpenCV)

I don't know much about mql but I know QT intermediately.

Thank you

01:45:55: Starting /home/mike/Downloads/Qt_OpenCV-master/QtQuick/build-CannyQml-Desktop_Qt_5_12_0_GCC_64bit-Debug/CannyQml...
QML debugging is enabled. Only use this in a safe environment.

(CannyQml:24471): GStreamer-CRITICAL **: 01:45:57.866: write map requested on non-writable buffer
01:45:57: The program has unexpectedly finished.
01:45:57: The process was ended forcefully.
01:45:58: /home/mike/Downloads/Qt_OpenCV-master/QtQuick/build-CannyQml-Desktop_Qt_5_12_0_GCC_64bit-Debug/CannyQml crashed.

theshadowx · wrote on 5 Jan 2019, 08:15

@mikeitexpert
Could you add this issue in https://github.com/theshadowx/Qt_OpenCV/issues

Thanks

mikeitexpert · wrote on 5 Jan 2019, 08:32

here: https://github.com/theshadowx/Qt_OpenCV/issues/5

Is there any way I can convert qml to c++ code just to get an idea how your methods works in pure C++?

Thank you

mikeitexpert · wrote on 7 Jan 2019, 08:34

Please let me know if there is any update on this.

Mike