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I've been using kdenlive to make videos on ubuntu for a while and the screen grab has been fine but, for some reason (probably something I did to try to get the desktop start button to work on ubuntu 20.04) my display has changed from :0 to :1

I have been able to muddle on by starting screen capture in a terminal with

ffmpeg -video_size 1306x745 -framerate 25 -f x11grab -i :1.0+60,23 ./scrgrab01.mp4

Then importing each of the clips into kdenlive. But it's a bit messy having to edit a terminal command and remember which clip is which. Also I have now set up a desktop computer with more muscle and want to use that for rendering but that too has the display :1 not :0

I tried going into configure->capture->manage encoding profiles and trying to add ffmpeg arguments like

-crf 25 -i :1.0+60,23 -vcodec libx264 -preset veryfast -threads 0

(and lots of different permutations of that) But nothing has worked so far.

Is there something really obvious that I have overlooked?

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