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Cannot Write project back to DLT
Tue, 2007-10-23 08:35 — mapro
Larry has been helping me through this but I thought I would post it to see if anyone else has had this problem and to confirm what I think is the problem.
The project I'm needing to do is to make back up copies of DLTs, both DVD-5s and DVD-9s. The original DLTs have CSS. I can copy them to a hard drive as Tape Image or Disk Folder with no problems. The problem is copying them to new DLTs. I get an error every time I try to write the tape image back and the program quits immediately after hitting start on the copy Video TS tries.
Now if I try to play the Video TS with DVD player on the Mac, the folders loads just fine, Menu with audio plays fine but when I play a video track the video is fine but the audio is all distorted, weird pulsing static. If I burn a disc I get an error as soon as I go into the video track, invalid encryption or something like that.
Has anyone heard or experience of audio being scrambled on the DLT itself? These are authored in England (I'm in the states) but they are NTSC projects. Audio is LPCM when I open the VIDEO TS in DVDAE.
Project back in-house
Went to the boss-man and got the project back in-house, I have round tripped the project, VideoTS>DLTs>VideoTS>DVDR-DL proof disc.
Final Disc play fine in computers and set top!
Thanks for the help.
- Mike
Hi Mike, Glad I could help -
Hi Mike,
Glad I could help - sorry you missed out on the project, though.
Cheers,
Ian
Worked!
Ian, I almost hate you for that (Almost). Worked perfectly. Wish I had seen it sooner, the salesman sent the project to an outside company without telling me.
The log on the first open of the Video TS changed a couple of sectors, on second it was clean, Disc file to DLT worked just fine.
Thanks.
Mike
Double-check permissions etc
Hi Michael,
I know you're a long-term user so I'm sure you've already done this, but just in case, please can you try following my step-by-step DLT procedure, as detailed here and see if you still have the problem ? For example, make sure you have the project open in the main window before you open the Format window. If you still get the crash, we can try to look into it further.
Ian
Got copies of the Replicated disc
I finally got copies of the replicated disc and have used Mac the Ripper to stripe the CSS and I can make DVD-Rs that play fine in my computer. But any time I try to go from a disk folder to the tape drive DVDAE quits right after I hit start.
I have deleted the plist files, this happens on a 10.3.9 and 10.4.10 boot volume.
In which case, my
In which case, my suggestions are wrong and there is a fault with either the tapes, your drive, the OS-X SCSI drivers or DVDAE. Hopefully Larry will be able to get to the bottom of it. In the meantime I don't think sending the image off for a glass master is worthwhile - something is wrong with the restore. Is there a manufactured copy available ? You could use MacTheRipper to copy this to drive and use that as the source, rather than the DLTs.
Ian
CSS is flagged but not keyed...
at least that is what I'm being told by the log and Larry. There is nothing scrambled on the tape. The weird thing is the video is fine, it is just the audio and I can make DVD-Rs that play back fine on a set top player. DVDAE is supposed to be able to copy DLTs that have been flagged for CSS.
I cannot send the tapes off, they are a clients and they do not want them to go anywhere else but I'm trying to get my place to send the tape image on a DVD off to see if it can have a glass master made from it. But since this is just for testing and trouble shooting I don't see them spending the money.
Be cool if HDAE told you this....
Can the SSCRST setting be read from the DLT? It would be cool for DVDAE/HDAE to tell you the current setting (and whether or not the date can be read successfully) when extracting contents of a tape.
Of course, how often does one encounter SSCRST 2 these days? ;->
Michael
I'm no expert, but this all
I'm no expert, but this all seems consistent with there being CSS on the tape, to me. CSS is designed to prevent files copying correctly, which is what is happening - DVDAE "thinks" the copy is OK but the resulting files are corrupt. The error messages you're seeing are consistent with copy protection issues, and CSS is not normally applied to menu VOBs, which is why the menus play cleanly, I think. Could you send the tapes to your friendly neighbourhood replicator to get them checked ?
Tried Mac the Ripper
I did have to burn a disc and then ripped it (An image file did not work).
The "ripped" disc still has the audio distortion (only on VTS, audio on the menus is fine) on it when played back on a G4 with 10.4.10. With my Macbook Pro the disc will not even go into the VTS, says something like unknown encryption. The "ripped" disc and just a straight burned disc for a Video TS folder read out of DVDAE plays fine on a settop player.
Just to recap, I can make a tape image file from the DLT to a hard drive with DVDAE, if I do a compare it passes with no error. But I cannot write that tape image file back to a new DLT, it fails. Larry is telling me the log file is pointing to a hardware error. I have tested round-tripping other DLTs from other places and they work fine.
The audio is just the weird element.
DVD Extractor
Actually last time I checked MacTheRipper only works from a disc, not from files. I guess you could try writing the restored VIDEO_TS folders to disc, but this potentially introduces another variable - I'm not sure whether Toast would correctly write CSS encrypted files ?
If you have a Mac with OS-9 or Classic, there is an old utility called DVD Extractor which might do the trick.
Ian
See: Mac the Ripper
See: Mac the Ripper
DVD Decryptor for Mac?
I'm Mac only anything like this on the mac side?
I've never come across this before
I've never come across this before, but I got a similar message about "invalid encryption" when I used DVDAE to import a VOB directly from a DVD which had CSS. I think you may have the rare case of the CSS being encrypted on the tape, and DVDAE is copying the scrambled VOBs. ( Not sure why only the audio is affected, though ). This is just a stab in the dark, but have you tried using DVD Decryptor or a similar utility to copy the data ? If there is CSS present, this might strip it out so you can keep working.
Ian
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