This method entails first downloading the PDF ebook, and running qpdf on the download using the --qdf option to normalize and uncompress the data. Once normalized and uncompressed, the PDF may be unlocked from within Adobe Reader and printed to file. The resulting PostScript file is unprotected and may be freely redistilled (converted) back to PDF with Ghostscript's ps2pdf. Presto. No more "Redistilling encrypted PDF is not permitted" message!
Pros* Simple, user-friendly* Quick and efficient conversion speed* Keeps Dolby 5.1 soundtracks (AC3 audio track), multilingual subtitles, closed captions, and audio descriptions in the output MP4 according to your preferences* Powerful DRM removal software for iTunes movies, TV shows, and music videosCons* MP4 is the only output format* Free-trial version only allows converting the first 5 minutes of each iTunes movie
If you are looking for a free and efficient iTunes DRM removal tool, Requiem should be an optimum choice. It is designed to remove DRM blocks and is able to decrypt most files within seconds or minutes. With Requiem, even songs, videos, and books you've bought and downloaded from iTunes are possible to be decrypted as DRM-free files. Moreover, the whole DRM removal process is lossless so that the original quality and all details of the source file will be well-preserved.
Pros* 100% Free to download and install* Cracks DRM from audios, videos, and books without quality loss* Available on Mac, Windows, and LinuxCons* iTunes is needed to be downgraded to 10.7 or a lower version to smoothly run Requiem* Conversion speed is relatively slower than other DRM removal software* No new update since version 4.1 has launched 2b1af7f3a8