20 mb limit for epubs

bobcdy · 04-28-2011, 10:34 PM

I was all set to upload a corrected version of my last old geology book - 'Geology and Extinct Volcanos of Central France' - but ran into a problem: the file of 20.6 mb is too large for acceptance by MobilRead. The problem resulted from adding an additional image, that of a large folding map that was ok for ADE but together with other changes raised the file size from the previous <19 mb to the present size. Of course I can cut down the image resolution (I typically use 150 dpi rather than 75 dpi - the lower res is fine for an ereader but I use color images and the higher res is much better for viewing them on a computer, and I could use gray scale images if absolutely necessary).

Is there any way that the file size limitation might be elasticized a bit?
Bob
* * *
Never mind - with careful editing of the images I was able to shave off a couple of megs to get well within the limit.
Bob

Jellby · 04-29-2011, 04:02 AM

As a workaround you can split your file in pieces (I believe WinRar lets you do that) and upload them. I did that with some 30MB file.

bobcdy · 04-30-2011, 10:05 PM

Thanks Jelly for the info; I may need it fairly soon because I'm working on De Re Metallica by Agricola (Herbert Hoover transl.) that has many many illustrations and is about 800 pages long including the extensive footnotes. The figures, however, are gray scale so perhaps it won't be a lengthy as I fear. It's slow going but hopefully should be done sometime in May.
Bob

crich70 · 07-18-2011, 01:29 PM

You also might try shrinking the images down. I did that with Lewis Carroll's "Alice In Wonderland" & "Through the Looking Glass" when I was putting the two stories together in one epub. There are programs (some free) that enable you to reduce the size of images and I used one for the Alice books. Otherwise they'd have been well past the 20 mb size limit. You can't tell just by looking that they were shrunk down either.

04-28-2011, 10:34 PM	#1
bobcdy Fanatic Posts: 527 Karma: 1048576 Join Date: May 2009 Device: bebook; prs-950; nook simple touch; HTC Jetstream tablet	20 mb limit for epubs I was all set to upload a corrected version of my last old geology book - 'Geology and Extinct Volcanos of Central France' - but ran into a problem: the file of 20.6 mb is too large for acceptance by MobilRead. The problem resulted from adding an additional image, that of a large folding map that was ok for ADE but together with other changes raised the file size from the previous <19 mb to the present size. Of course I can cut down the image resolution (I typically use 150 dpi rather than 75 dpi - the lower res is fine for an ereader but I use color images and the higher res is much better for viewing them on a computer, and I could use gray scale images if absolutely necessary). Is there any way that the file size limitation might be elasticized a bit? Bob * * * Never mind - with careful editing of the images I was able to shave off a couple of megs to get well within the limit. Bob Last edited by bobcdy; 04-28-2011 at 11:14 PM. Reason: added new material

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04-29-2011, 04:02 AM	#2
Jellby frumious Bandersnatch Posts: 7,515 Karma: 18512745 Join Date: Jan 2008 Location: Spaniard in Sweden Device: Cybook Orizon, Kobo Aura	As a workaround you can split your file in pieces (I believe WinRar lets you do that) and upload them. I did that with some 30MB file.

04-30-2011, 10:05 PM	#3
bobcdy Fanatic Posts: 527 Karma: 1048576 Join Date: May 2009 Device: bebook; prs-950; nook simple touch; HTC Jetstream tablet	Thanks Jelly for the info; I may need it fairly soon because I'm working on De Re Metallica by Agricola (Herbert Hoover transl.) that has many many illustrations and is about 800 pages long including the extensive footnotes. The figures, however, are gray scale so perhaps it won't be a lengthy as I fear. It's slow going but hopefully should be done sometime in May. Bob

07-18-2011, 01:29 PM	#4
crich70 Grand Sorcerer Posts: 11,306 Karma: 43993832 Join Date: Feb 2010 Location: Monroe Wisconsin Device: K3, Kindle Paperwhite, Calibre, and Mobipocket for Pc (netbook)	You also might try shrinking the images down. I did that with Lewis Carroll's "Alice In Wonderland" & "Through the Looking Glass" when I was putting the two stories together in one epub. There are programs (some free) that enable you to reduce the size of images and I used one for the Alice books. Otherwise they'd have been well past the 20 mb size limit. You can't tell just by looking that they were shrunk down either.

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