[robertk]

From Axel Boldt's idea diary,

1/24/2007 10:13 PM Defeat any copy protection on video/audio: play the content on a certified software player in a virtual machine, copy material from the virtual screen/loudspeaker.

http://math-www.uni-paderborn.de/~axel/Diary.txt

[vetinari]

Not that easy - any virtual machine, that allows copying material from virtual output devices will break the chain of trust and the certified player will refuse to play.

[jrockway]

The problem with the "chain of trust" is that most of the links are held by Chinese companies who bid the lowest. All it takes is one employee with access to the key to leak it, and then everyone has it.

Note the ready availability of HDCP-strippers, for example.

[tomjen3]

You won't have much luck with that, I tried to view some online flash video in a virtual machine (we all know how fucked flash is on Linux), which lost the audio/movie sync after about 20 minutes.

[sorbus]

It being in a virtual machine doesn't necessarily have anything to do with the problems; Audio/video sync in lots of flash content doesn't even work properly outside of virtual machines.

[tomjen3]

I watched the rest of the video on a normal windows machine, it didn't have any problems.

[Dylan16807]

I'd put the odds over 80% that it's just because the VM wasn't fast enough. You then have two options. One is to get a faster machine, the other is to run the VM in slow motion while you save. Obviously the second isn't an option for realtime viewing.