Thank you for your reply, mate!
I'm not looking for a paid solution for 40 dollars! As a matter of fact it's expected that Acrobat should have the feature!
As for the rest, I've just found a partially free online solution which is available at the following link:
There are some snags though I can split my file into several parts and use it for free.
So, here is my final solution without any further restrictions.
There are actually a couple of things you should do before applying split down the middle option from command line which is available at the open source project of Sejda
Having scanned a handbook using your ADF you should run Acrobat and enhance your scans with a text recognition. Pages should be automatically rotated to a correct orientation (album). For example, in my case there were 54 A4 pages. I then went through each page and cleared them off noise made by light so as to save printer toner and align text. When it's done your document is ready for splitting down the middle option.
Here's the command I used in order to split the pages and get a normal order:
C:\sejda\bin>sejda-console splitdownthemiddle -f /sejda/bin/111.pdf -o /sejda/ -r last-first
if you get an error check all paths or delete an output file created after splitting (in my case it would be saved to /sejda/ directory)
BTW: Don't forget to install RunTime Java Environment to your PC.
Open the PDF created by your scanner and use Acrobat correct the page orientation.
Next Open the "Edit PDF" and use the "Crop pages" tool to crop the odd pages into one file. Repeat the crop again to crop the even pages.
Good day, thank you for giving me a hand. I'll check the script asap and let your know how it works.
However, what I can say at the very moment that I should rotate all pages to a normal orientation at first place I've got a duplex-ADF therefore I get each inner side upside down.
Why do I have to use the computer with acrobat Pro 11 to make thumbnails and go through the file page by page, cropping pages and rearranging the order? On the computer with Acrobat Pro DC it's either very complicated or impossible. On the Pro 11 I select the thumbnail, crop the page and rearrange by dragging. All from one window. Pro DC doesn't seem to have that straightforward approach.
Some scanners do rotate the pages. If this is not need then you do not need to do it.
If your scanner makes individual PDFs of each page, then you must combine them in the correct order.
The sheer rotation of pages itself in PDF isn't the problem. I usually open a fresh-baked document in Acrobat and it does just what the doctor ordered.
Thanks everybody. I'll check out advice you've given me.
Well, Karl, I've just tried splitpages.js script and it turned out not to be as what I've been looking for.
The script you suggested is useful, I really appreciate that you shared it with me, however it deals with a different kind of order.
To get a better understanding here's the type of a handbook we digitize using our ADF.
I remove thin metal staples and then a whole bunch of sheets put in my Duplex-ADF. You can figure out what sequence of pages would be as a result if my ADF scans both sides of A4 format on which printed 4 pages of A5. There won't be odd or even page order in my case, not in the least.