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Good afternoon,

I wonder if there is a way to export images (batch export mainly) setting the minimum size of any exported pic. For stock photography I need images that should be 4Mb (jpgs) at least; I'm exporting from retouched Tiffs (generally 3600px X 5000px), setting "export to jpg" as my only custom option, some files are 4+ Mb but most of them are only 2-3Mb..

 Thank you in advance

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In the New Batch Job dialog, you should see a "..." button to the right of the JPG selection, which will allow you to specify a few options. What Quality level do you have specified?


-- Walt

Windows 10 Home, version 1903 (18362.145), 16GB memory, Intel Core i7-6700K @ 4.00Gz, GeForce GTX 970
Affinity Photo 1.7.1.404 and 1.7.2.424 Beta   / Affinity Designer 1.7.1.404 and 1.7.2.424 Beta  / Affinity Publisher 1.7.1.404 and 1.7.2.422 Beta

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Hi Walt,

thanks for the reply. You are right, my settings for jpg export were at 85, so I put it at 100 and now the size has increased. Still I wonder if there is a more accurate way to predict or keep the desired size into a specific range of Mb...in this case I need min 4Mb but I'd also like to avoid having 20Mb files. Working with tons of images would make this non time-consuming, I couldn't imagine do and check the export one by one..

I could easily do that in CaptureOne for example because for any image you can see how much (in Mbs) is going to weight, but it's a longer process since you have to create a new session for any export...

 

Thanks

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17 hours ago, Massi said:

I need images that should be 4Mb (jpgs) at least

Why do you want to specify a minimum file size? Don’t you just need maximum quality? :/


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Affinity Designer/Photo/Publisher 1.7.1.404 • Windows 10 Home (4th gen Core i3 CPU)
Affinity Photo for iPad 1.7.1.143 • Designer for iPad 1.7.1.1 • iOS 12.3.1 (iPad Air 2)

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16 hours ago, walt.farrell said:

In the New Batch Job dialog, you should see a "..." button to the right of the JPG selection, which will allow you to specify a few options. What Quality level do you have specified?

It's working but I've noticed that you need to change these settings anytime again, it doesn't "remind" your last settings...am I wrong?

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8 minutes ago, Massi said:

the stock photography platform I'm working with need min 4mb images

That makes no sense to me. The file size for a JPEG at any given quality setting is entirely dependent on the content of the image: a 5000 px by 3600 px image with a diagonal linear gradient fill exports out of AD on iPad to yield a JPEG (at 100% quality) with a file size of more than 7 MB, but if I switch to a solid fill the file size drops below 0.5 MB.


Alfred online2long.gif
Affinity Designer/Photo/Publisher 1.7.1.404 • Windows 10 Home (4th gen Core i3 CPU)
Affinity Photo for iPad 1.7.1.143 • Designer for iPad 1.7.1.1 • iOS 12.3.1 (iPad Air 2)

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7 minutes ago, Massi said:

It's working but I've noticed that you need to change these settings anytime again, it doesn't "remind" your last settings...am I wrong?

Mine seems to remember the last value I set.


-- Walt

Windows 10 Home, version 1903 (18362.145), 16GB memory, Intel Core i7-6700K @ 4.00Gz, GeForce GTX 970
Affinity Photo 1.7.1.404 and 1.7.2.424 Beta   / Affinity Designer 1.7.1.404 and 1.7.2.424 Beta  / Affinity Publisher 1.7.1.404 and 1.7.2.422 Beta

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Alfred I really have no answers for you, that's what they ask and this topic is not about it. If you have any suggestion regarding the topic you welcome, besides  that......

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8 hours ago, Massi said:

the stock photography platform I'm working with need min 4mb images

Are you sure it is a MB (megabyte) & not MP (megapixel) requirement for images in the JPEG format? Which stock photo platform is it?

As @Alfred mentioned, a 4 MB minimum for JPEG files doesn't make any sense because the file size when using JPEG compression is strongly dependent on the compressibility of the image data, which in turn is dependent on the amount of pixel-to-pixel variation in the image. So for example, a photo with a lot of nearly uniform blue sky in it can be compressed to a much smaller file size without a noticeable loss of quality than a sunset shot with a lot of multi-colored clouds in it.


Affinity Photo 1.7.1, Affinity Designer 1.7.1, Affinity Publisher 1.7.1; macOS High Sierra 10.13.6 iMac (27-inch, Late 2012); 2.9GHz i5 CPU; NVIDIA GeForce GTX 660M; 8GB RAM
Affinity Photo 1.7.1.143 & Affinity Designer 1.7.1.1 for iPad; 6th Generation iPad 32 GB; Apple Pencil; iOS 12.3.1

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