https://bugs.kde.org/show_bug.cgi?id=501245

Jean-Baptiste Mardelle <j...@kdenlive.org> changed:

           What    |Removed                     |Added
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     Ever confirmed|0                           |1
             Status|REPORTED                    |CONFIRMED

--- Comment #9 from Jean-Baptiste Mardelle <j...@kdenlive.org> ---
Ok, so while this is not really ideal, here is a short summary of the situation
and a workaround. The issue you are seeing is because I made some changes to
the Transform effect to fix shakiness when doing slow zooms. Zooming was not
smooth because the rescaling was done with a pixel precison level, so sometimes
you could see some "hicups" in the zoom.

Original bug is here: https://bugs.kde.org/show_bug.cgi?id=497435

The scaling is now done at a sub pixel precision, which means that  if you have
an image with a resolution higher than displayed, on small moves you can see
some pattern changes.

The workaround is to apply a very light blur effect to your image to reduce the
patterns, which should give you the expected result. Try for example to add an
"average blur" with the default parameters (x=1, y=0) and you should have
smooth zooming with no noise.

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