[SOLVED] dvdbackup

GPGAgent · 04-22-2020, 07:38 AM

I've copied some DVDs to an hdd - VIDNAME/VIDEO_TS which contains the usual IFO, VOB and BUP files.

dvdbackup is a great program, it can extract titles and chapters as you wish but it only reads from an actual dvd drive:
-i, --input=DEVICE where DEVICE is your DVD device
if not given /dev/dvd is used

My dvd drive is sadly no longer but I did manage to copy a number of dvd's to an hdd.

How can I simulate a dvd drive for dvdbackup to process a folder with the dvd folders in it?

Oddly dvdbackup can read the structure of the dvd with the -I switch
-I, --info prints information about the DVD

Code:

charlie@charlie-machine:/home/charlie/BillAbbot$ pwd dvdbackup -I -i .
libdvdread: Couldn't find device name.
Cannot read title from DVD device .
DVD-Video information of the DVD with title ""

File Structure DVD
VIDEO_TS/
	VIDEO_TS.IFO	     20480	  20.00 KiB
	VIDEO_TS.VOB	  40775680	  38.89 MiB
	VTS_00_0.IFO	     20480	  20.00 KiB
	VTS_00_0.VOB	  40775680	  38.89 MiB

One of the messages I get is:

Code:

Cannot open specified device /dev/dvd - check your DVD device

So maybe I need to mount the folder /home/charlie/BillAbbot as /dev/dvd

Any ideas folks?

BTW I tried gcdemu without any success.

ondoho · 04-22-2020, 08:11 AM

Quote:

Originally Posted by GPGAgent

Code:

charlie@charlie-machine:/home/charlie/BillAbbot$ pwd dvdbackup -I -i .
libdvdread: Couldn't find device name.
Cannot read title from DVD device .
DVD-Video information of the DVD with title ""

File Structure DVD
VIDEO_TS/
	VIDEO_TS.IFO	     20480	  20.00 KiB
	VIDEO_TS.VOB	  40775680	  38.89 MiB
	VTS_00_0.IFO	     20480	  20.00 KiB
	VTS_00_0.VOB	  40775680	  38.89 MiB

It obviously can read the folder structure, but cannot find a title.
Not sure what to do about it, maybe the ripped data simply doesn't include the title?
Also dvdbackup does not compress or transcode the video, so you won't be gaining much by using it on something that's alrady on your hard drive. I think you want something that can actually transcode the DVD data (or one of its titles) to a single compressed video file?
I believe ffmpeg can do that.

GPGAgent · 04-22-2020, 08:50 AM

Quote:

Originally Posted by ondoho

It obviously can read the folder structure, but cannot find a title.
Not sure what to do about it, maybe the ripped data simply doesn't include the title?
Also dvdbackup does not compress or transcode the video, so you won't be gaining much by using it on something that's alrady on your hard drive. I think you want something that can actually transcode the DVD data (or one of its titles) to a single compressed video file?
I believe ffmpeg can do that.

My thoughts as well, if -I can read it why can't it process it?

I have transcoded it with Handbrake, so I may just stick with that for now.

ondoho · 04-22-2020, 01:46 PM

Quote:

Originally Posted by GPGAgent

My thoughts as well, if -I can read it why can't it process it?

Have you been able to read the DVD title with any other software?
Have you considered that the DVD title simply might have got lost when you originally ripped it?

GPGAgent · 04-25-2020, 12:21 PM

Quote:

Originally Posted by ondoho

Have you been able to read the DVD title with any other software?
Have you considered that the DVD title simply might have got lost when you originally ripped it?

Answers
No, not found any program that does it
and
The Title is there - before my DVD drive went u/s it worked fine

GPGAgent · 04-25-2020, 12:23 PM

I've found a solution using mencoder

This one will read Title number 9

Code:

mencoder dvd://9 -dvd-device /media/charlie/SEAG_4GB/TOSHIBA_4GB/MAGIC-DVDS/BillAbbot/  -oac mp3lame -lameopts abr:br=128  -ovc lavc -lavcopts vcodec=mpeg4:vhq:v4mv:vqmin=2:vbitrate=1000 -vf pp=de,crop=0:0:0:0,scale=480:-2    -o "BillAbbot-Title-09.avi"

You can also include chapters