DVD-9 Dual Layer DLT mastering problem
Hi all,
I am posting this to the forum in the event that it may help some one else that may find themselves in the same situation.
I can confirm what appears to be a bug in DVD Architect 3.0c when creating a Dual Layer DVD-9 master using the master to DLT tape function.
Basically, when creating a DLT master if you set 'Disc copyighted=Yes', and do not set any limits on copies (ie unlimited copies allowed), no CSS, and no Macrovision, then the size of the IMAGE.DAT file written to tape is incorrect (and BTW, this is the default setting!).
Test #1 - This results in the DLT image being INCORRECT
Disc copyrighted=Yes
Copy generations (CGMS)=Unlimited
CSS=Disabled
Macrovision=Disabled
DLT IMAGE.DAT size = 2,919,006,208 (size of file when mastered to DLT and then restored back to Hard Disk)
HDD IMAGE.DAT size = 2,919,013,344 (size of file when mastered to Hard Disk)
Test #2 - This results in the DLT image being CORRECT
Disc copyrighted=No
Copy generations (CGMS)=Unlimited
CSS=Disabled
Macrovision=Disabled
DLT IMAGE.DAT size = 2,910,486,528 (size of file when mastered to DLT and then restored back to Hard Disk)
HDD IMAGE.DAT size = 2,910,486,528 (size of file when mastered to Hard Disk)
I don’t know if the order is important, but I mastered to DLT first, then mastered to HDD, and then restored from tape.
I then compared the restored IMAGE.DAT to the HDD mastered IMAGE.DAT.
I did not test to see what happens if the CGMS/CSS/Macrovision settings are set to anything other than Unlimited/Disabled/Disabled, or if the issue occurs with a non Dual-Layer project. That should be the job of the Sony testers.
So, the work around, if you mastering to a DLT with a DVD-9 dual layer project is to explicitly set 'Disc copyrighted=No' if you are not using CGMS/CSS/Macrovision.
A couple of extra points also:
(1) This is a bit of a gotcha, if you change the copyright setting to 'No', and save the project, the setting is not saved, and reverts to 'Yes' when the project is re-opened. (This occurs even if the setting is set to 'No' in the default settings of DVD-Architect).
(2) If you want to write a tape without compression, and you are writing to a previously recorded DLT, when the DVDA detects that the tape has data already on it, it resets the DLT drive before asking if you wish to overwrite the data on the tape. The tape unit will have then lost the 'no compression' setting if you have disabled compression, so you must re-set 'no-compression' before clicking on OK in DVDA. The same thing happens when DVDA goes to write the second layer.
(3) On screen, DVDA calls the layers Layer1 and Layer2. On disk they are Layer 0 and Layer 1. On screen they should be Layer 0 and Layer 1 for compatability with the industry.
I spent over a week and 20 or more emails backwards and forwards to various folk chasing this problem after our DLT tape arrived with the manufacturer and the manufacturer reported the error.
I can confirm that the new tape (with copyright=no set) went to manufacture without issue.
I have some people to thank for their help: Scott at Eclipse Support, Scott Rossi at Sonarus, Jeff Sunderland at DVDTech, and Grant from MotionLink. I emailed all these folk for help, and they all responded with input, several times. So, thank you. All the contributions together helped me track down and identify the exact problem.
I hope this helps anyone else that has this issue.
I have sent this in as a bug report to Sony.
Regards,
Lance.
-----
Lannistoria
http://www.lannistoria.com/
Hi all,
I am posting this to the forum in the event that it may help some one else that may find themselves in the same situation.
I can confirm what appears to be a bug in DVD Architect 3.0c when creating a Dual Layer DVD-9 master using the master to DLT tape function.
Basically, when creating a DLT master if you set 'Disc copyighted=Yes', and do not set any limits on copies (ie unlimited copies allowed), no CSS, and no Macrovision, then the size of the IMAGE.DAT file written to tape is incorrect (and BTW, this is the default setting!).
Test #1 - This results in the DLT image being INCORRECT
Disc copyrighted=Yes
Copy generations (CGMS)=Unlimited
CSS=Disabled
Macrovision=Disabled
DLT IMAGE.DAT size = 2,919,006,208 (size of file when mastered to DLT and then restored back to Hard Disk)
HDD IMAGE.DAT size = 2,919,013,344 (size of file when mastered to Hard Disk)
Test #2 - This results in the DLT image being CORRECT
Disc copyrighted=No
Copy generations (CGMS)=Unlimited
CSS=Disabled
Macrovision=Disabled
DLT IMAGE.DAT size = 2,910,486,528 (size of file when mastered to DLT and then restored back to Hard Disk)
HDD IMAGE.DAT size = 2,910,486,528 (size of file when mastered to Hard Disk)
I don’t know if the order is important, but I mastered to DLT first, then mastered to HDD, and then restored from tape.
I then compared the restored IMAGE.DAT to the HDD mastered IMAGE.DAT.
I did not test to see what happens if the CGMS/CSS/Macrovision settings are set to anything other than Unlimited/Disabled/Disabled, or if the issue occurs with a non Dual-Layer project. That should be the job of the Sony testers.
So, the work around, if you mastering to a DLT with a DVD-9 dual layer project is to explicitly set 'Disc copyrighted=No' if you are not using CGMS/CSS/Macrovision.
A couple of extra points also:
(1) This is a bit of a gotcha, if you change the copyright setting to 'No', and save the project, the setting is not saved, and reverts to 'Yes' when the project is re-opened. (This occurs even if the setting is set to 'No' in the default settings of DVD-Architect).
(2) If you want to write a tape without compression, and you are writing to a previously recorded DLT, when the DVDA detects that the tape has data already on it, it resets the DLT drive before asking if you wish to overwrite the data on the tape. The tape unit will have then lost the 'no compression' setting if you have disabled compression, so you must re-set 'no-compression' before clicking on OK in DVDA. The same thing happens when DVDA goes to write the second layer.
(3) On screen, DVDA calls the layers Layer1 and Layer2. On disk they are Layer 0 and Layer 1. On screen they should be Layer 0 and Layer 1 for compatability with the industry.
I spent over a week and 20 or more emails backwards and forwards to various folk chasing this problem after our DLT tape arrived with the manufacturer and the manufacturer reported the error.
I can confirm that the new tape (with copyright=no set) went to manufacture without issue.
I have some people to thank for their help: Scott at Eclipse Support, Scott Rossi at Sonarus, Jeff Sunderland at DVDTech, and Grant from MotionLink. I emailed all these folk for help, and they all responded with input, several times. So, thank you. All the contributions together helped me track down and identify the exact problem.
I hope this helps anyone else that has this issue.
I have sent this in as a bug report to Sony.
Regards,
Lance.
-----
Lannistoria
http://www.lannistoria.com/