https://bugs.kde.org/show_bug.cgi?id=492708

Richard Ash <richardash1...@yahoo.co.uk> changed:

           What    |Removed                     |Added
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                 CC|                            |richardash1...@yahoo.co.uk

--- Comment #3 from Richard Ash <richardash1...@yahoo.co.uk> ---
I have observed the same issue, and it is because the quality set is being
passed to the "qscale" option string, where what is needed is to set the "crf"
option string.

This can be overcome by manually editing the Preset XML file (mine is located
at ~/.local/share/kdenlive/export/customprofiles.xml):
- in the "args" attribute, replace `qscale=%quality` with `crf=%quality`
- add to the profile the XML attribute `qualities="1,63"`
kdenlive has to be restarted to re-read the render presets file.

After this I can chose different CRF factors and see different size files.
However, if I use the graphical render preset editor to change anything, then
these changes are lost and I have to add them back in.

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