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Hello, |
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|
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On Sat, 17 Dec 2011, Neil Bothwick wrote: |
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>On Sat, 17 Dec 2011 20:13:43 +0000 (UTC), Grant Edwards wrote: |
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>> Yep. I'm not aware of any Linux software that can create an encrypted |
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>> DVD -- but I've never had a desire to do that, so my lack of knowlege |
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>> of such a thing shouldn't be used as an indication of non-existence of |
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>> such a thing. :) |
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> |
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>You also don't have the hardware to create them. CSS keys are stored on a |
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>separate area of the disc, an area that is not available on DVD-Rs, |
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>which is why yo cannot copy a CSS-encrypted DVD with dd, it copies the |
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>encrypted data but not the decryption keys. |
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|
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Sure they can be read and copied with ddrescue. On some disks at |
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least. This one, I copied with ddrescue: |
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|
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$ xine dvd://${PWD}/some_rather_recent_dvd.iso |
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This is xine (X11 gui) - a free video player v0.99.6. |
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(c) 2000-2007 The xine Team. |
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libdvdread: Using libdvdcss version 1.2.11 for DVD access |
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libdvdcss error: failed to open raw device, but continuing |
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|
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libdvdread: Attempting to retrieve all CSS keys |
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libdvdread: This can take a _long_ time, please be patient |
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|
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libdvdread: Get key for /VIDEO_TS/VIDEO_TS.VOB at 0x00000130 |
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libdvdread: Elapsed time 0 |
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[..] |
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|
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and the xine plays the .iso as usual. On the other paw, there's other |
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discs where 'ddrescue' just causes those "scrambled sector" messages, |
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but the images made with k3b works just fine: |
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|
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$ xine dvd://${PWD}/some_other_recent_dvd.iso |
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This is xine (X11 gui) - a free video player v0.99.6. |
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(c) 2000-2007 The xine Team. |
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libdvdread: Using libdvdcss version 1.2.11 for DVD access |
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libdvdcss error: failed to open raw device, but continuing |
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|
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libdvdread: Attempting to retrieve all CSS keys |
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libdvdread: This can take a _long_ time, please be patient |
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|
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libdvdread: Get key for /VIDEO_TS/VIDEO_TS.VOB at 0x00000130 |
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libdvdread: Elapsed time 0 |
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|
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Go figure. |
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|
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And, as I've said, there's other broken discs where k3b etc. won't |
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work either and you have to resort to copy only single titles ... |
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|
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So, I generally try with ddrescue first and have a 'tail -f' on the |
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log (I filter those sr_mod messages to a seperate logfile[1] ;) Then |
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k3b (or brasero etc., an imaging program anyway). Then (by now) |
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dvdbackup. There are some alternatives, but I've basically given up on |
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those. |
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|
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HTH, |
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-dnh |
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|
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[1] ==== /etc/syslog-ng/syslog-ng.conf ==== |
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filter f_sr_mod { facility(kern) and message("sr[0-9]"); }; |
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[..] |
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filter f_messages { not [..] and not filter(f_sr_mod); }; |
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filter f_warn { level(warn, err, crit) and [..] not filter(f_sr_mod); }; |
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[..] |
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destination srmodmessages { file("/var/log/sr_mod"); }; |
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log { source(src); filter(f_sr_mod); |
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destination(srmodmessages); flags(final); }; |
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==== |
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|
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-- |
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Dinner not ready...(A)bort (R)etry (P)izza |
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