Lightroom 6.12: Converts RAW to Jpeg results in much smaller Jpegs than b4

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  • Problem
  • Updated 10 months ago
  • Not a Problem
  • (Edited)
I used to get 7-9M files from 5dm3 at 100% conversion quality from RAW and now only 3-4M in Lightroom 6.12.  Also, before/after flickers and I heard it was fixed on CC but see it wasn't fixed here yet in 6.12
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Reuven

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Posted 10 months ago

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Yves Crausaz

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J'ai fait l'essai, mais sans contrôler mon preset d'exportation.... qui était à 80% pour la qualité, si je passe à 100% la taille du jpg est toujours correcte !

I tried, but my control export preset. . . . which was 80% for quality, if I switch to 100% the size of the jpg is always correct!
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Reuven

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There is no "correct" size, I was getting 7-10M at 100% from large Canon RAW before, now only 3-4M.  Something is wrong.
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Todd Shaner, Champion

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JPEG uses lossy compression and the file size is highly dependent on the subject matter in the picture. Shoot a plain white wall and the file size will be very small. Shoot at a very high ISO (3200, 6400) setting and the file size will be larger due to a high amount of noise in the image, etc....

A good article here on the subject:

http://regex.info/blog/lightroom-goodies/jpeg-quality
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Reuven

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THX!  Problem solved.  Was shooting shirts on pure white backdrop - should have thought of that.
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Todd Shaner, Champion

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Glad to help. The 100 JPEG Quality setting greatly inflates the file size without increasing image quality. It's only useful to prevent recompression artifacts if you have to edit a JPEG file destructively multiple times (i.e. multiple saves). With LR's non-destructive editing workflow this is not necessary.

There are really only 13 Quality settings in LR and they are the same as in PS. There's no real benefit of using higher than LR JPEG Quality 85-92 (PS 11) and 70-76 (PS 9) is generally generally identical in quality for most images. Check out the link I provided for more info.

JPEG QUALITY SETTINGS

Photoshop     Description    Lightroom

0                      Low                 0-7%

1                      Low                 8-15%

2                      Low                 16-23%

3                      Low                 24-30%

4                      Low                 31-38%

5                      Med                 39-46%

6                      Med                 47-53%

7                      Med                 54-61%

8                      High                 62-69%

9                      High                 70-76%

10                    Max                 77-84%

11                    Max                 85-92%

12                    Max                 93-100%
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Reuven

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Yes, I know about this, great article BTW.  I usually do about 65%, and had upped it to 100% when the files were only 700K @ 65% and I had thought it was a bug.  100% gave me 4M & I mistakenly thought that was "helping".  Now that I tried 100% on an old file, the Jpeg came out 16M, very large and usually useless.

BTW, do you know what's up with the "flicker" in 6.12 when using the slash key for before/after, in the "before" view?  I saw someone say it was fixed in CC, it very distracting when trying to compare subtle things.
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Todd Shaner, Champion

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Apparently there are two bugs that cause this issue and LR 6.12 only fixes the bug on Mac systems. I haven't experienced the flashing on my Windows 7 system with CC 2013.12 or earlier versions. It may be on Windows 10 only or related to the graphics driver. Try updating it.

https://feedback.photoshop.com/photoshop_family/topics/lightroom-cc-image-blinks-when-toggling-betwe...
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Reuven

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I'm running Yosemite on Mac Retina.  Afraid to update to Sierra yet.  Saw the thread now, unchecking GPA fixes it but slows down edit update in Develop Mod.
(Edited)
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Todd Shaner, Champion

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I suggest adding this issue as a comment at the link I provided above. It will let Adobe know that the issue still exists on Yosemite and perhaps other users may have a solution. Thank you.