Category Archives: DVD

Ripping unfinalized DVDs from Linux

Recently we had some DVD’s with old family videos that had been recorded directly but never finalized, the device that recorded them then broke so it was impossible to finalize them, and it seemed to be pretty much impossible for anything else to read them. So, I figured out a way to recover them using linux…

First I installed the dvd+rw-tools package on ubuntu and used that to get various info and prove that the DVD itself was readable even though nothing on the system could see it as a video disk or filesystem.

I then pulled the entire DVD into a file on the local computer for easier processing later. The command will produce lots of errors (as there are parts of the DVD that are not readable as they were never written to), but the output file (image.iso) will contain a full dump of the DVD eventually

I then put together a short perl script to search through this file for 1kb blocks beginning with the magic tag DVDVIDEO – these seemed to be the starts of individual chapters, which avconv (also called ffmpeg on some distributions) can then extract into proper video/audio.

Save that as extract_dvd_tracks.pl and then run it to extract them as files named like out0.mp4. Note that it won’t process tracks that are less than about 1Mb because there seemed to be a number of small sections like this which we wanted to skip over.

Job done! Note that there are probably many different formats and layouts for unfinalized DVD’s, this may be just one of many but hopefully the principle remains the same.