To compress dozens of PDF files as long as the source document is
available (ODT) I compress images within it by hand one by one with
LibreOffice. To do so, I do right-click a picture > Compress > a new
dialog appears > I set out compression > I click Calculate so I know
resulting size > click OK > picture compressed. I teach online course
and this manual way is the way I do to make transcripts. From a 20MB
raw document, I can make it smaller to 3MB or so as PDF. I share this
to you and I hope this could be useful. Thanks.
