Re: Strange 'regression' in gtk+/gstreamer app

[cecashon aol com]

It could be a problem with the double buffering.

gtk_widget_set_double_buffered()

Try to set that to false and see if that makes any difference. This is on Linux? Usually you don't need this 
function any more and it is deprecated but it can sometimes still be useful. I know to get gnuplot pictures 
to redraw without flickering or a white background, it needs to be false.

I did a little gstreamer experimentation a little while back with the webcam video. It works without 
gtk_widget_set_double_buffered() using Ubuntu 16.04, GTK3.18 and gstreamer1.0. No flickering that I can see. 
I don't have a scrollbar in there though. It might be helpful.

https://github.com/cecashon/OrderedSetVelociRaptor/blob/master/Misc/Sound/webcam3.c 

Eric