PS Version 23.1 JPEGS SAVING AT A FRACTION OF THE SIZE OF WHAT THEY DID WITH THE PREVIOUS VERSION!

Forum|Forum|4 years ago
January 4, 2022
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I just updated my PS to version 23.1 (I also updated Camera Raw at the same time but it doesn't show any version info to include) and am having the below significant issue. I'm working on a Mac running Big Sur 11.6

JPEGS SAVING AT A FRACTION OF THE SIZE OF WHAT THEY DID WITH THE PREVIOUS VERSION -

I haven't changed any settings, but since the update the JPEG file size decreased dramatically. Prior to the update the Max JPEG file size ranged from around 23-30MB, and after the update the max file size is now around 1-7MB (7MB is the highest max size I've seen yet after doing many photos). I'm doing larger scale prints and this is a problem

I've always used the same method for saving .psd files as jpegs - I just to Save As. No changes on my end and yet the file size is dramatically smaller, and it's a problem

Help!!!

macOS

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Stephen Marsh

Community Expert

@PamelaCorey

Please provide the following basic information as a start point:

* Pixel width and height of the imge open in Photoshop

* Colour mode (RGB, CMYK etc)

* Bit depth (8, 16 or 32 bpc)

* No. of Alpha channels and their description (simple saved seletions or more complex)

* JPEG save method (Save or Export)

* JPEG settings, quality level and other options

* Image content and detail level, sharpness etc. Are you comparing similar types of images? If you have a working PSD file that was previously saved as a JPEG in the old version, can you save as a JPEG in the new version to compare exactly the same image?

P.S. Open up a previously saved image that is large in size, saved from an older version. Go to File > File Info and then the Raw data tab. Does it mention that no info can be shown, or do you see a bunch of raw metadata XML text?

Can you share a before and after image that are "the same", except for one being saved large in the older version and one being saved smaller in the new version?

The forum is here to help, but we need precise info to do so.

D Fosse

Community Expert

Please tell us the pixel dimensions of the original.

In most normal scenarios, the jpeg compression will reduce file size to about 2 - 5 % of the uncompressed file size. But there is in fact no way to predict the final size of a jpeg, because it all depends on image content. Flat areas compress much more effectively than high frequency detail.

In short, a jpeg is supposed to be tiny. That's why the jpeg format is still in use, despite all its drawbacks.

It sounds like your previous jpegs may have had excessive metadata bloat. This can happen with files that have gone through many iterations, like e.g. templates. Each copy/paste adds a new round of metadata, and in some of these cases metadata alone can account for several hundred MB.

PamelaCorey作成者

Participant

I would agree that could be a possibility if anything I was doing was different, but it hasn't been. I'm using the exact same type of images I always shoot with the exact same retouching techniques. The only thing that has changed is the Photoshop version that I'm using.

Everything on my end has been the same, but the result is very different. I'm concerned about the image quality when the largest jpeg file I can save is 1 or 2MB and I'm printing a 30x60" print. I used the be able to have much larger jpegs.

Can we please dive deeper into this so I can get this fixed?

Thanks

Stephen Marsh

Community Expert

Can a moderator please merge the following duplicate post into this topic?

https://community.adobe.com/t5/photoshop-ecosystem-discussions/jpeg-files-saving-at-a-fraction-of-the-size-they-used-to-since-updating-the-software-today/m-p/12604356