TaxiDriver
Well-Known Member
Em nghe bảo không rip ra wav được các đĩa hàng xịn đắt tiền của Tây do bảo mật, tầm $50-100/đĩa.
Em thấy đĩa VN, đĩa cỏ rip ầm ầm...
Em thấy đĩa VN, đĩa cỏ rip ầm ầm...
Trừ đĩa quá xước, còn đâu mình chưa thấy CD nào ko RIP đc.Đến khó như SACD (tung cẩu vẫn chưa làm giả đc) mà còn RIP đc layer SACD mà.
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Có cụ buôn CD hàng ngon từ Đức về, em hỏi mượn để ríp. Cụ đó cười bảo ríp bằng mắt, nó bảo mật kinh lắm, nên mới ngồi hóng!![]()
ko biết có phải cái loại chống copy CD game như em từng gặp ko, nó bảo mật dạng 2 lớp data nên copy bình thường vẫn chạy nhưng chạy ko biết chừng nào xong (có khi 1000 năm), lúc đó em phải dùng 1 phần mềm gì đó (quên mịa tên rùi) đọc nó thì thấy ra 2 cái data giống nhau, nhưng cái thứ 2 mới copy được nhưng rất mất thời gian
Nên có người làm khóa thì có thợ mở khóa thôi, ko gì là kinh cả
Game thì miễn bàn rồi bác ạ, có một thời cài game cần khoảng 4CD gì đó, cài xong phải cho CD số 1 (hoặc tạo ổ ảo rồi mount vô) thì game mới chạy đó.ko biết có phải cái loại chống copy CD game như em từng gặp ko, nó bảo mật dạng 2 lớp data nên copy bình thường vẫn chạy nhưng chạy ko biết chừng nào xong (có khi 1000 năm), lúc đó em phải dùng 1 phần mềm gì đó (quên mịa tên rùi) đọc nó thì thấy ra 2 cái data giống nhau, nhưng cái thứ 2 mới copy được nhưng rất mất thời gian
Nên có người làm khóa thì có thợ mở khóa thôi, ko gì là kinh cả
=)) =)) =)) Chuẩn rồi, HDVN khá nhiều hàng đó.à cụ ý không cho mượn, lên trên này down gần như cái gì cả có, không có thì hỏi thế nào cũng có cụ up cho, cho cụ kia đi ị đi
![]()
Em cũng nghĩ theo ý này đó bác, mấy bác buôn bán thường sống thực tế.Em cũng đoán vậy, họ kinh doanh nên mình mượn để ríp thì còn gì nói nữa. Để em hỏi lại![]()
How to rip copy protected audio CDs ...
As this is a frequently asked question, I make this thread sticky and sum up information from other threads here. If you have to add something, feel free to do so.
Basically there are 2 copy protection mechanisms for audio CDs:
1. Manipulated table of content (TOC)
Result: Software that uses the TOC to find content on a CD instead of scanning the CD (like native Windows, most software players), can't find the audio tracks or confuses them with data tracks.
2. Manipulated error detection/recovery information
Audio CDs contain 2 layers of error detection/recovery data (C1 + C2, comparable to redundant CRC checksums). If a CD is slightly damaged (-> light scratches), the audio data returned by the drive is still perfect as C1+C2 information is used to correct errors. On worse damages the original audio data can't be restored anymore, the drive still 'knows' which samples are wrong and tries to interpolate them to make the errors less audible. Generally standalone CD players are designed to do a better job on this than PC drives. Copy protections that introduce C1/C2 errors resulting in interpolation, intentionally try to do this in a way that standalone players' interpolation makes the errors inaudible, while PC drives fail, resulting in audible clicks/pops.
How to extract audio from protected CDs:
There are 2 ways:
1. Using standalone equipment
There are several ways depending on the available equimpent:
- standalone CD player -> standalone recorder
- standalone CD player -> digital connection -> soundcard -> PC recording/editing software
- standalone CD player -> analog connection -> souncard -> PC recording/editing software
2. Using PC equipment
These are the steps that are important:
2.0. Shift button
When inserting a copy protected CD press the shift button to disable autostart. Otherwise you might get software you don't want.
2.1. The Drive
There are some combinations of drive and copy protection that will never work, no matter what software you use. Before getting desperate, try different drives and/or ask in formus like this about your drives. Trying different firmware versions *might* help in some cases.
2.2. How to recognise the audio content on the CD
To be able to extract audio data, you must use software that works arround the manipulated TOC. There are several possibilities. Remember: With some drives you will just have no luck, so you don't have to try every possibility with each drive. The following software has been reported to help against TOC manipulation:
- A replacement for Win's native CD file system driver CDFS.VXD
- AnyDVD
- CloneCD (next step (ripping) integrated), probably other similar programs
- Exact Audio Copy (EAC) (ripping integrated), Version 0.95 pre-beta3 and earlier
- Audiograbber (ripping integrated)
- Plextools (only with Plextor drives - ripping integrated)
- Easy CD-DA (ripping integrated) - in some cases this software makes clicks caused by CDS disappear that are there with other software.
- Nero Burning Rom (Direct copy to CD-R; details here: http://forums.afterdawn.com/thread_view.cfm/83180 )
- There's a CD manipulation trick reffered to as post-it or marker trick to cover a 2nd session data track on the CD and make it unreadable (see links).
2.3. The software used to read the audio data (and save them to HDD)
- If one of the 1st two possibilities works, and the copy protection consists of TOC manipulation only, any audio extraction software can be used.
- If creating an image with CloneCD (or similar software) worked, an image manipulation software like CDMage can be used to extract the audio from the image.
- The 3 audio extraction programs mentioned at 2.2. have special options to handle manipulated TOC. With EAC it works like this:
--- Get Exact audio copy 0.95 prebeta 3 from here: http://www.afterdawn.com/software/audio_software/cd-da_extractors/index2.cfm - in newer versions some TOC manipulation options have been removed.
--- Install EAC using e.g. this guide: http://users.pandora.be/satcp/cd2mp3-en.htm
--- EAC -> EAC options -> Tools -> 'Activate beginner mode...' disabled
--- Action -> TOC alterations -> try different commands, e.g. 'Detect TOC manually', 'Retrieve native TOC'
--- Trying both - Inserting the CD after EAC is started and vice versa - can help.
2.4. What to do with CDs with altered error recovery data
The signs for such a CD are these:
- Even if following 2.0-2.3 resulted in successfully extracted audio files, these files contain audible errors like clicks, pops or gaps of silence.
- Extraction is noticably slower than of ordinary CDs, especially in EAC secure mode, C2 activated (if drive supports it)
To get better results this might help:
- Lower extraction speed, if not accessible with the extraction software you use, with CDBremse or Nero Drivespeed
- Try burst mode (EAC)
- Try different drives
- Extract with different drives, do a WAV comparison (EAC -> Tools) or a wave substraction using a wave editor. Due to different interpolation algorithms, you'll find positions with interpolated samples by this. Listen closely to these positions, if necessary use a wave editor's click/glitch removal (time consuming).
- One of the methods using a standalone CD player might give better results.
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Related links:
http://cd-rw.org/articles/archive/cactusdatashield.cfm (article by cd-rw.org about CDS)
http://forums.afterdawn.com/thread_view.cfm/47122
http://forums.afterdawn.com/thread_view.cfm/47666
http://forums.afterdawn.com/thread_view.cfm/51009
http://forums.afterdawn.com/thread_view.cfm/27915 (threads about copy protected CDs)
http://forums.afterdawn.com/thread_view.cfm/34124 (Post-It/Marker trick)
http://forums.afterdawn.com/thread_view.cfm/60316 (about EAC 0.95pb4 missing TOC features)
Không có CD/BD nào là không rip được cả. Em lâu không rip nhưng nhớ hồi cách đây 20 năm còn có kiểu rip bit-by-bit. Vấn đề là họ không muốn cho mượn nên nói thế thôi.