Why does CSS protection cause problems burning to disc?

[katieburchett]

I have created a DDP 2.0 image file for my DVD and flagged CSS. I wanted to test it by burning it to DVD using imgburn. I've done this many times before and had no problem with image files where CSS was NOT flagged. This time I received this error message when trying to burn: 'Your image looks as though it may contain CSS protected data. Attempting to burn an image containing CSS protected data will give you a disc that won't be playable by normal players.'

The resulting disc actually plays fine but a message keeps popping up saying 'attempting to read media.'

I was just wondering why flagging CSS causes the disc to have trouble being read like this, and to confirm that it's normal and that there isn't anything wrong with my DDP image?

[DB83]

Burnt DVDs do not support CSS (just as they do not support Region encoding)

Both CSS and Region Coding are flags that authoring programs write to media, usually tape, that Replication plants understand - they create a Master Disk from the source which the disks are then pressed from.

Surely, if you get an error message than the disk does not play 'fine'

[katieburchett]

Burnt DVDs do not support CSS (just as they do not support Region encoding)

Both CSS and Region Coding are flags that authoring programs write to media, usually tape, that Replication plants understand - they create a Master Disk from the source which the disks are then pressed from.

Surely, if you get an error message than the disk does not play 'fine'

It plays fine despite the error messages. But that explains the problem, thank yOu for explaining it!

[jagabo]

The CSS decryption key on commercial DVDs is in a location that can't be written to on DVD+/-R media. If you had actually encrypted your video you would not have been able to play it after burning because there was no decryption key. All you did was set the flag to say the video was encrypted. Like putting a bunch of unencrypted documents in an envelope and labeling the envelope "encrypted" -- anyone who opens the envelope will be able to read the documents.

[Cornucopia]

Burnt DVDs do not support CSS (just as they do not support Region encoding)

Both CSS and Region Coding are flags that authoring programs write to media, usually tape, that Replication plants understand - they create a Master Disk from the source which the disks are then pressed from.

Surely, if you get an error message than the disk does not play 'fine'

Actually, unlike CSS, burned discs DO support Region Coding.

Scott

[katieburchett]

The CSS decryption key on commercial DVDs is in a location that can't be written to on DVD+/-R media. If you had actually encrypted your video you would not have been able to play it after burning because there was no decryption key. All you did was set the flag to say the video was encrypted. Like putting a bunch of unencrypted documents in an envelope and labeling the envelope "encrypted" -- anyone who opens the envelope will be able to read the documents.

So even though I only set the flag, would it still confuse the DVD player? (Just want to make sure it's the CSS flagging that was causing the error message and not a problem somewhere else.)

[DB83]

Burnt DVDs do not support CSS (just as they do not support Region encoding)

Both CSS and Region Coding are flags that authoring programs write to media, usually tape, that Replication plants understand - they create a Master Disk from the source which the disks are then pressed from.

Surely, if you get an error message than the disk does not play 'fine'

Actually, unlike CSS, burned discs DO support Region Coding.

Scott

My bad.

I was associating the encoding screen in Ulead DVD Workshop which allowed for a CSS flag etc to be written on to DLT. And since many authoring programs (to my knowledge) to do provide for Region Coding I put 2 and 2 together and, yet again, made 5.

I guess the OP was attempting some copy protection. Not gonna happen on burnt dvds.

[katieburchett]

I was flagging it for a replication plant, I just wanted to test it by burning it to disc. Then I got the error message which worried me whether the DDP was corrupt in some way or if the CSS flagging was confusing the DVD player.