Best DVD ripper?

[pgu]

Which is the best DVD ripper for Linux? Here I mean the best DVD drive to ISO file ripper. I'm not talking about transcoding or converting into other formats.

I'm currently using ddrescue but are there any better rippers available? Are there any programs available which will check the resulting ISO file for errors?

[Jaglover]

Code: Select all

mplayer dvd://1 -dumpstream -dumpfile rippeddvd.vob

http://www.avidemux.org/admWiki/doku.ph ... dvd_to_avi

[pgu]

Code: Select all

mplayer dvd://1 -dumpstream -dumpfile rippeddvd.vob

But that will only extract the VOB file. Is the ripper library used by mplayer better than the one found in ddresque when it comes to bad DVD's etc? I get the same result by doing this on a good DVD:

Code: Select all

mplayer dvd://1//dev/sr0 -dumpstream -dumpfile rippeddvd.vob
ddrescue --block-size=2048 --max-retries=3 /dev/sr0 rip.iso rip.log
mplayer dvd://1/rip.iso -dumpstream -dumpfile via-iso.vob
md5sum *.vob
2ed5d3f07c59a61e63ff53932f3753d0  rippeddvd.vob
2ed5d3f07c59a61e63ff53932f3753d0  via-iso.vob

ddresque has the ability to retry and split buffers to extract as much data as possible from a bad device, however it knows nothing about the file format of a DVD. My question is are there anything better than ddreque when it comes to just the ripping part?

[aCOSwt]

for what it is worth... a recent poll about this question with some significant amount of voters elected :
1/ HandBrake
2/ dvd::rip
3/ k9copy
Do not ask for my personal opinion... I do not rip dvd's.

[Jaglover]

Well, I believe I misunderstood your question. Ripping means getting content off of CD or DVD for me.
What you are doing is copy. I don't think there is better tool than ddrescue for that if DVD is damaged.

[pgu]

for what it is worth... a recent poll about this question with some significant amount of voters elected :
1/ HandBrake
2/ dvd::rip
3/ k9copy
Do not ask for my personal opinion... I do not rip dvd's.

Thanks, but I suspect that list is based on functionality other than just ripping the DVD to an ISO file.

[pgu]

Well, I believe I misunderstood your question. Ripping means getting content off of CD or DVD for me.
What you are doing is copy. I don't think there is better tool than ddrescue for that if DVD is damaged.

Yes, that's what it means to be as well. For me it also means to get all the information that's on the DVD hopefully without any loss.

If I said copy people would think I meant to make an extra physical DVD copy. I just want all the information from the DVD so I don't have to run the procedure again.

I know to many others ripping mean to transcode and to convert into some other format (x265, mkv etc) as well. But I tried to emphasize that I want an ISO file.

[Jaglover]

pgu,

without arguing over terminology I'd say you need ddrescue only if DVD is damaged and cannot be read properly. DVD has built-in error correction, every piece of data is recorded several times and when disc is read then the blocks of same data are compared to make sure errors won't slip in. Only when no two blocks read the same read error is given, then you need ddrescue to recover as much as it can.
As a result, if you copy a DVD using DVD writer it is possible your copy is better than original.

[pgu]

I'd say you need ddrescue only if DVD is damaged and cannot be read properly. DVD has built-in error correction, every piece of data is recorded several times and when disc is read then the blocks of same data are compared to make sure errors won't slip in.

That was also a part of my initial question, are there any programs which can analyze the error correction part of an ISO file and report if there are errors or not, and even correct the errors?

For me it's probably easier to read the DVD with ddrescue anyway since it don't know in advance if the DVD is damaged or not, except some of my kids favorite DVD's which have very visible scratches.

[Jaglover]

... are there any programs which can analyze the error correction part of an ISO file and report if there are errors or not, and even correct the errors?

Yes, every time a CD or DVD is read error correction is performed, if disc is damaged and some data cannot be read computer will stop reading it and exit with an error. This is the time to invoke ddrescue.
In other words, if computer finishes reading a file without stopping for an error the DVD in question was read correctly.

[piewie]

you can try readdvd, which is part of qpxtool: http://qpxtool.sourceforge.net/readdvd.html

[pgu]

... are there any programs which can analyze the error correction part of an ISO file and report if there are errors or not, and even correct the errors?

Yes, every time a CD or DVD is read error correction is performed, if disc is damaged and some data cannot be read computer will stop reading it and exit with an error. This is the time to invoke ddrescue.
In other words, if computer finishes reading a file without stopping for an error the DVD in question was read correctly.

This is not true for all types of reads, e.g. the command dd if=/dev/sr0 will read the entire DVD without any DVD specific error checking or correction being performed. It will also continue to read even if an error is detected.

You must mean some DVD-specific reading function which actually performs error checking and correction. Further I would assume it would be up to the implementation if it would stop or not in the case where an error is detected. The reading function found in the DVD players that I've used certainly don't stop in the case of an error. It will simply show a video glitch and continue.

[pgu]

you can try readdvd, which is part of qpxtool: http://qpxtool.sourceforge.net/readdvd.html

readdvd looks like a potential candidate. Now it would be great with a tool which would analyze the ISO files produced by readdvd and ddresque and report number of errors etc. so I could decide which is the best method.