• AnyStream is having some DRM issues currently, Netflix is not available in HD for the time being.
    Situations like this will always happen with AnyStream: streaming providers are continuously improving their countermeasures while we try to catch up, it's an ongoing cat-and-mouse game. Please be patient and don't flood our support or forum with requests, we are working on it 24/7 to get it resolved. Thank you.

Read errors by CloneBD

coopervid

Moderator
Thread Starter
Joined
Mar 15, 2007
Messages
5,130
Likes
2,606
This topic is quite subjective - I know very well and please don't make accusations or call me biased.

Today I tried to rip the UHD The Predator. CloneBD had a read error right at the beginning and suggested to clean the disc. There were fingerprints on it and I did so. Again read error right at the beginning.
Then I copied the disc with MakeMKV and no read errors. I took these files as a base to run it through CloneBD for making a 50Gb UHD disc and a 25 Gb BluRay movie only. Was perfect.

I had similar issues before and didn't have MakeMKV installed. I used then AnyDVD to rip discs with read errors. The downside is that AnyDVD just continues at a certain point and doesn't care about read errors. So you can copy the disc with errors but if you want to process the result with CloneBD the program will fail with the files AnyDVD created with read errors.
As a note: These errors were most likely more severe than that the one I saw today. So the truth is most likely somewhere in between.

Bottom line: I think CloneBD should get an option to keep trying to re-read smudged discs as an option in the general settings section and / or use error correction - if not used already.

No big deal since I found workarounds but that should maybe put on the "CloneBD list of things to do".
 
Last edited:
I used then AnyDVD to rip discs with read errors. The downside is that AnyDVD just continues at a certain point and doesn't care about read errors.
No, it does not. AnyDVD 8.3.4.0 certainly won't.
 
Bottom line: I think CloneBD should get an option to keep trying to re-read smudged discs as an option in the general settings section and / or use error correction - if not used already.

There is a persistent misconception regarding error correction. I should make this a sticky, because it comes up every now and then...

It's not something our (or any) software can do, error correction happens on the drive - all the time.
Data is stored on discs with a certain amount of redundancy (Picket codes) and, by that, made robust, so a certain percentage of misread bits can be reconstructed.

There are two kinds of read errors - recoverable ones and unrecoverable ones. The only ones you ever get to see are the unrecoverable ones.

Note, that without this error correction active not a single disc, no matter how perfect in condition, will be read without fatal read errors.
In other words: those read errors happen all the time, constantly and likewise bits are being routinely reconstructed by your drive all the time.
These recoverable read errors and the correction thereof are part of the design (same with DVB, btw.) - recoverable read errors are expected.

Those read errors will not ever surface, you won't notice them and from your perspective the data is in perfect condition.
That's the error correction.

When you do actually see read errors, the damage was so bad, that a reconstruction was impossible. At least a block of data (64kB) is screwed up (that's the error correction unit on Blu-ray Discs).
There is no way on earth you can reconstruct that or apply some other "magic error correction" - no additional redundancy is available and since these read errors occur block-wise, at least a sequence of 32 sectors is broken at once.
That would be a lot of data to guess.

So at least one frame of video is going to be completely broken. Due to the way AVC and HEVC references frames, this will tear down on average a half second of video (the typical scenario, though, is a group of read errors, multiple blocks).

The only "error correction" means available to CloneBD, is to warn the user about trouble and try to skip the bad area - the video will more or less noticeably skip pictures.
CloneBD already does that - it tries to get past the bad stuff. But only up to a point. Sometimes it's not possible to resynchronize.

Oh... right - re-reading: CloneBD also does that, I think up to 3 times per read error.
 
@Pete there's already the sticky and it has a reference to read errors. I'll copy your post into it, so it's explained in more detail and there's no need for a new sticky.

Verstuurd vanaf mijn Nexus 6P met Tapatalk

* edit * info added to "Read this before you post" sticky.
 
Last edited:
I don't understand this also.

I was able to rip my blurays with anydvd - giving no errors.
Trying to read them with CloneBD gives a warning about read errors.

What does that mean?

I suspect a bad drive.
 
You should post the CloneBD log so they can take a look at it.
 
I don't understand this also.

I was able to rip my blurays with anydvd - giving no errors.
Trying to read them with CloneBD gives a warning about read errors.

What does that mean?

I suspect a bad drive.
Which AnyDVD version did you use?
 
What's new is, that 8.3.4.0 fixes the "unreported error" problem.


Sorry I don't understand.

AnyDVD 8.3.4 reports no errors / CloneBD does ... I can make logfiles if needed.

Please let me know.
 
AnyDVD 8.3.4 reports no errors / CloneBD does ... I can make logfiles if needed.
Yes, of course, please do post log files.

Sorry I don't understand.
Previous versions of AnyDVD sometimes would not trigger read errors but instead, under certain circumstances, deliver empty sectors, so the rip could appear to be ok, but wasn't.
 
Yes, of course, please do post log files.


Previous versions of AnyDVD sometimes would not trigger read errors but instead, under certain circumstances, deliver empty sectors, so the rip could appear to be ok, but wasn't.

OK so I rip one disc with Anydvd (no errors) - can I save a logfile after ripping?

Then I try to rip with CloneBD (I will get read errors) - I can save the log.

Will take some time (usb 2.0)

Any other steps?
 
Log:
 

Attachments

  • CloneBD.1.2.4.0.FLIGHT.cbdlog
    369.6 KB · Views: 1
  • AnyDVD_8.3.4.0_Info.ziplog
    14.4 KB · Views: 1
  • AnyDVD_8.3.4.0_Info_H_FLIGHT_9068B629_4B8DA5A9.ziplog
    158.3 KB · Views: 2
OK so I rip one disc with Anydvd (no errors) - can I save a logfile after ripping?
The log file will not include any errors detected during the rip.
AnyDVD log files only scan the disc an show what occurred during that scan - which obviously doesn't go over the complete data.

Anyway, even so, both AnyDVD and CloneBD log files show severe, uncorrectable read errors:

CloneBD
Code:
00:29:24.898 | [00:50:51.625] - [ERROR  ] [0x0000000338c6ff40] Read error at 6763327
00:30:49.133 | [00:52:02.368] - [ERROR  ] [0x00000003481ffe00] Read error at 6889055
00:31:07.660 | [00:52:02.745] - [ERROR  ] [0x0000000348310000] Read error at 6889600
00:31:14.426 | [00:08:09.211] - [ERROR  ] [0x0000000348360000] Read error at 6889760

AnyDVD
Code:
 19.64s: read sectors failed, sense 3:11:5      // **** L-EC UNCORRECTABLE ERROR
 28.61s: read sectors failed, sense 3:11:5      // **** L-EC UNCORRECTABLE ERROR
 51.42s: read sectors failed, sense 3:11:5      // **** L-EC UNCORRECTABLE ERROR
 58.00s: read sectors failed, sense 3:11:5      // **** L-EC UNCORRECTABLE ERROR
 64.73s: read sectors failed, sense 3:11:5      // **** L-EC UNCORRECTABLE ERROR
 73.30s: read sectors failed, sense 3:11:5      // **** L-EC UNCORRECTABLE ERROR
 80.00s: read sectors failed, sense 3:11:5      // **** L-EC UNCORRECTABLE ERROR
 
AnyDVD rips this disc to .iso without showing any errors???? :eek:
 
Any slim drive is bad compared to a standard desktop drive. Might not be cheap, but a better option would be a full size desktop drive in a 5.25" bay enclosure.
 
I have the same problem with all bluray(s) so I think this drive is s.... Reads CDs & DVDs perfect.
 
Back
Top