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Comments on how to determine from the command line whether a DVD is encrypted

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how to determine from the command line whether a DVD is encrypted

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I am currently ripping a bunch of DVDs. Some are encrypted, and some are not. My method for ripping a DVD depends on whether or not it is encrypted, so I am looking for a command-line method to determine if a DVD is encrypted or not.

My current way to detect whether a DVD is encrypted or not is that if it is encrypted, then running dd if=/dev/sr0 of=file.iso results in "Input/output error". I'm looking for a better way.

*Note: I know that DVDs are often encrypted with the Content Scramble System (CSS), and that you need to install a package such as libdvdcss to read encrypted DVDs.

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posted about 2 years ago
1y ago by Canina‭
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Trevor‭
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2 comment threads

In what way "a better way"? (1 comment)
I'm not sure what you mean by "digitizing", since DVDs are already digital. Are you trying to transco... (2 comments)
I'm not sure what you mean by "digitizing", since DVDs are already digital. Are you trying to transco...
deleted user wrote about 2 years ago
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I'm not sure what you mean by "digitizing", since DVDs are already digital. Are you trying to transcode the DVD video to a different format (e.g. MP4, MOV etc), or copy the DVD data verbatim to a hard drive without changing the format? What software are you using for this process?

Trevor‭ wrote almost 2 years ago · edited almost 2 years ago
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Sorry for the late reply. Good point, I guess maybe I should have said "ripping" instead of "digitizing". I'm saving the whole DVD as an ISO file. Usually I use the command dd if=/dev/sr0 of=file.iso. This command will result in an "Input/output error" if the DVD is encrypted. So if I see that error, then I know the DVD is probably encrypted. However, using this command and checking for that error would be a sloppy, indirect method to determine if the DVD is encrypted, so I'm looking for a better way.