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I get this error when trying to submit an ePub through iTunes Producer:
ERROR ITMS-90228: "Images larger than 4,000,000 pixels are not allowed in books"
I don't have any photos over 4 million pixels. Help?
After reading all these responses and doing a little research on my own I finally found a way (that takes less than 10 minutes a book) for this to work.
1. Export from InDesign without Rasterizing Cover Photo
2. Make sure to save a cover photo with the short side at a minimum of 1400 pixels.
3. Then I upload the .epub to Itunes Producer
4. Write down which image sizes are oversized
Now to Fix the Problem
5. Download a Free app called ePub Zip/ Unzip
6. Unzip your ePub
7. Find the Images that were over 4 Million Pixels
8. Resize in Photoshop and Save
9. Zip with the ePub Zip Application
Ta-da. All done
I hope this helps!
The above "fix" is what I will have to do—but seriously this little problem is huge for some of us. I would REALLY like to have one set of files for print and ebook. But there is NO WAY that I can find to have indesign export full page images in smaller sizes pixels x pixels in the EPUB if the actual pixel x pixel size is adequate for print. If you chose the say 150 dpi output the quality is less but the pixels by pixels stays the same. How is this possible?
For example no interior image maybe more than 4 million pixels. A full page image in a 6" x 9" book is 1800 x 2700 pixels = 4.59 million pixels. If reduced (in photoshop) to 1600 x 2400 pixels it will pass as it's 3.84 pixels. But then you have to have two sets of images.
Is there a setting in the object export options which can solve this problem?
I might add that the client will not accept a file that isn't 300 dpi for the ebook, so even if rasterize container is not checked the full page images are too big. The below setting in object export options, with a custom width set to 1600px still gives me an image size of 1800 px (in width) in the epub images folder.
It is 2020 and I have this problem too. I followed @Small Town Gal's suggestion, but my cover wasn't the culprit.
Here’s sharing my full story:
After 6 uploads over 3 days of experimenting, my book (a graphic novel) is successfully submitted.
1. Created epub using InDesign with images done in Photoshop and Illustrator, then placed in InDesign.
2. First few attempts to submit using iTunes Producer were rejected for ERROR ITMS-90228, over an “OEBPS/image/12.png” exceeding 4,000,000 pixels which I could not trace in my artwork. In fact none of my images is a PNG.
3. Googled for solutions and installed “Unarchive” as recommended. Unpacked the ePub file to try identify the problem file. Found it in the OEBPS/image folder. Have no idea what it is, unlike other images which have names still intact.
4. Opened “12.png” in Photoshop (visible as white rectangle, dimensions 2676 x 3704, resolution 300 dpi) and reduced its dimensions by 50% and resolution to 96dpi. (All other images are shown to be 150 dpi). Saved it as PNG.
I also noticed that all my images had been converted into PNGs by InDesign.
5. Another submission with same error reply from Apple.
6. Reviewed in my mind the posted comments and recalled someone mentioning that InDesign creates huge PNGs for empty text blocks. Also images with transparent property are converted to PNG which supports transparency.
I had none of those.
However, I had created a grey background by filling a rectangle in black and using a slider to reduce it to 85% opacity. This was in the Master Page as background for all the pages.
I suspected this 85% tint is considered transparency in Indesign and was converted into a PNG.
7. So I created a PNG in Photoshop to replace the grey rectangle. I named it “Grey Bgr.png” so I could identify it.
8. Exported a new epub from InDesign and resubmitted.
9. Came back with another Error ITMS-9228. But I can see that “Grey Bgr.png” got through.
10. I realise I also have rectangles filled “white” (called “paper” in InDesign) and decided to create PNGs following Step 7 above.
11. Replaced them in the InDesign file, exported epub, resubmitted and passed the last hurdle.
For me the biggest takeaway: Don’t create any big rectangle in InDesign. Do it in another software, save as PNG and import. I guess rectangles drawn in InDesign are placeholders not only for text, but also for colour fills or images, and are rendered as 300 dpi PNGs with huge dimensions in epub. Hope Adobe can fix this.
The best workflow is to NOT rely on InDesign for any conversion of your images (at least if your book will be published as an ebook). InDesign's PNG conversion is mediocre in terms of quality and file size at best. More importantly, in my own experience, and observations on these forums, most users have little understanding how InDesign interprets the export PPI resolution.
Another issue is that InDesign will generate large PNG files when filled rectangles are part of the layout (as you discovered).
Couple of tips to keep image files under control in your ebook:
I see Derek Cross mentioned this earlier in this thread, but I wanted to chime in and recommend that if you run into a problem like this in Apple Transporter, you should consider testing your EPUB file in FlightDeck (www.ebookflightdeck.com). FlightDeck tests every EPUB with EpubCheck, but also tests it for compliance with the requirements of all of the major ebook retailers, including Apple.
In addition to providing human-readable error report output, it gives you a sortable table of all of the images in the file, even hidden images, so that you can see which images are problematic more easily.
FlightDeck is a subscription service, but it is worth the cost to know that your EPUB files meet industry requirements and best practices.
If you have questions about the tool, please don't hesitate to reach out to me.