"Cycle Redundancy Check" errors

[Telexen]

I'm trying to copy my RedvsBlue Season 3 DVD to my HDD but keep getting "Cycle Redundancy Check" errors near the end of the copy. I've tried using two computers, and check that error specifically on DVDShrink (when it's going through analysis), and a similar error on DVD Decrypter.

Nothing seems to be wrong with the disc after visual inspection and I've watched most of the content on a standalone DVD player and an Xbox without a problem.

Any ideas what's causing the error?

Thanks.

[laspis59]

Try DVDFab Decrypter.Its very good at ripping stubborn DVD's.

[redwudz]

CRC errors are generally when a program compares the original to the copy. Sometimes caused by disc corruption, but more often by the copying process. If something is running in the background that interrupts or interferes with the copy process this can happen.

If it's a damaged disc, not a lot you can do except to clean the disc. If you have tried DVDDecrypter and told it to retry errors, that's one method. If the disc itself is damaged or it's a bad copy, try to replace it. The alternative is to ignore the errors and get what you can off the disc and lose the corrupted part.

[jimmalenko]

In my experience, CRCs have almost always been caused by either scratches or fingerprints on the disc. I've had limited success with using different software - I've had much more success with trying a different DVD Drive (one which may just be less sensitive to these errors), or cleaning the disc. Towards the end of the disc generally indicates that perhaps there's some fingerprints where you've picked up the DVD, right on the out rim of the disc.

[Telexen]

The thing is this DVD is new. It started shipping on the 11th and I got mine yesterday. I don't see any scratches other than one or two very, very minor ones...but there are some things that look like a dip or crater in the disc but they're in the middle of the disc. I'll try with DVDFab Decrypter...then I'll ask around on the RvB forum to see if anyone else has tried copying theirs yet.

Thanks guys.

*edit*

maybe I should note though thatwhere I've tried DVD Decrypter on both computers - they failed in different spots.

[BSpielbauer]

Nothing seems to be wrong with the disc after visual inspection and I've watched most of the content on a standalone DVD player and an Xbox without a problem.

The above reply is correct, MOST CRC errors are caused due to a dirty disc, or one which has fingerprints, smudges, or scratches, mars, oily spots, etc.

Note that the fact it plays fine is often meaningless. DVD players (including XBox) have all sorts of built in error correction to try to "play through" any problems on discs. In most cases, they are so good at it that you never know there was a problem on the disc.

A standalone DVD player (or even the playing software on a PC) will usually deal with these types of errors by trying to search for another frame close by to replicate or duplicate, or by jumping to the next frame which appears unharmed. It uses many more tricks, as well. Its job -- try to fool you into thinking there was no problem, so you are not distracted when you view the film.

Ripping is different, though. Now, you are trying to get a piece of hardware to read every individual "1" and "0" on a disc, and the software will usually stop at the first false read, to let you know. Its job -- try to accurately copy each and every bit from the disc onto your hard drive (perhaps while removing encryption). If there is even the slightest problem, its job is to let you know. Almost the opposite of the above.

-Bruce in Chi-Town

[laspis59]

The thing is this DVD is new. It started shipping on the 11th and I got mine yesterday. I don't see any scratches other than one or two very, very minor ones...but there are some things that look like a dip or crater in the disc but they're in the middle of the disc. I'll try with DVDFab Decrypter...then I'll ask around on the RvB forum to see if anyone else has tried copying theirs yet.

Thanks guys.

*edit*

maybe I should note though thatwhere I've tried DVD Decrypter on both computers - they failed in different spots.

From what I read DVDFab Decrypter has ripped DVD's that the excellent DVDDecrypter couldn't.btw theres also ISOBuster if that fails.
If theres a dip/crater the DVD may be warped.

[zworg2]

In my experience, CRCs have almost always been caused by either scratches or fingerprints on the disc. I've had limited success with using different software - I've had much more success with trying a different DVD Drive (one which may just be less sensitive to these errors), or cleaning the disc. Towards the end of the disc generally indicates that perhaps there's some fingerprints where you've picked up the DVD, right on the out rim of the disc.

I have to agree with Jim. I have had a number of 'difficult' discs. Although i have some sucess trying different software, Shrink, Decrypter and even Windows Explorer (has worked once or twice when others failed!) I get much better sucess rate when i try the disc in a different drive.

If as you say the different PC were failing in different places, it sounds very much like smudges or scratches that are causing the problem.

Try cleaning the disc, even though it looks clean already. Try any other different drives that you may be able to use.

A a possibkle solution, try cleaning the drive lenses.....(has been a problem once or twice for me)

Hope you solve it.

[bidefordboy]

If DVDDecrypter with 'ignore read errors' checked does'nt work, try '1ClickDVDCopy', it will skip the bad sectors & copy the rest. You can download a trial copy here :-
http://www.1clickdvdcopy.com/download.html
It will allow you to make three copies before having to register.

[lordsmurf]

Skipping errors is no good. That'll leave artifacts.
What you need to do is return the disc, and get another one. I've bought DVDs that were bad, had to return. Pressing is not perfect either.

[bidefordboy]

Of course, if you can get a replacement, that is the perfect solution. But sometimes that is'nt possible. I have copied disc's that have had over 100 read error's, & on playback you might get a couple of second's of artifacts. My suggestion was only as a last resort.

[Shocker Milwaukee]

I've run across a new disc in pristine condition that gave me CRC errors with both my DVD writer & DVD ROM. My solution was to use my brother's computer, which had no trouble.

In my experience, ISOBUSTER is no better than DVD Decrypter at ripping a scratched disc (both failed at the same area of the disc).

[Telexen]

Well I've tried just about everything now. I've tried making ISO images and copying it directly (it's not encrypted)...so I've given up. Maybe I'll be able to download it or find a friend who bought it and copy theirs.

It's difficult to for me to return it since I got it directly from RedvsBlue's store (I sponsor the series...get discount on DVD)

[JoeBolden]

You should return it to the store. The store should be able to return a defective disc and get it replaced for free by the distrubitor. Tell them that it doesn't play well in your player ( don't mention that you are tring to copy it). Replacement of bad DVD's with another one of the same is a standard business policy. Ofcourse you can't get a refund or a different title.

Good Luck