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Incus J

How to set JPEG quality in Firemonkey?

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I'm having difficulty saving a JPEG file in Firemonkey.  Here's the code:

procedure SaveImage(bmp:TBitmap; filename:string);
  vOpt.Quality:=20; //Quality setting ignored? :(

On Windows everything seems OK, however when the program is compiled for MacOS the resulting JPEG file is not at the Quality specified.  The image quality setting seems to be ignored.  How do I set the JPEG output quality on MacOS?  (Delphi Tokyo 10.2.3)

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Can anyone recommend a 3rd party JPEG library that works with Firemonkey?  It would need to be fairly self-contained I think, so it would work on both Windows and MacOS.

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