[MPlayer-users] mplayer and Windows Media DRM
kichigai at comcast.net
Tue May 24 02:18:47 CEST 2005
On May 23, 2005, at 16.11, Andrew Pimlott wrote:
> On Fri, May 20, 2005 at 05:54:44PM -0700, RC wrote:
>> On Wed, 18 May 2005 15:41:36 -0700
>> Andrew Pimlott <andrew at pimlott.net> wrote:
>>> Could mplayer tell me instead of making me struggle to figure it out
>> Probably not. What's the difference between a broken file, and a
>> DRMed file? How is mplayer supposed to detect that, and not
>> mistake a
>> one problem for the other?
> I don't know, I'm not the developer. :-) I would think it's a
> matter of
> some flag in the header saying "I am DRMed/encrypted/whatever". Since
> mplayer understands the file format, I would think it would be easy to
> check this field. But maybe it's more complicated than I realize.
>> A developer would have to look through the
>> specs of every different DRM implimentation, and include a check for
>> each one. Lots of work for no real gain, IMHO.
> I don't agree that there is no real gain. Detecting DRM would allow
> mplayer to educate the user about why it cannot play the file.
> Currently, the user just thinks that mplayer is broken, and that's not
> good for mplayer.
>>> Could this fact be added to the documentation or the FAQ?
>> That is a more likely possibility. Would you like to submit a patch?
> I'll try, but I don't know much about mplayer or video formats, so
> somebody will proabably have to edit it.
> Q: Can mplayer play files with DRM?
> A: DRM (Digital Restrictions Management or Digital Rights
> Management) systems are intended to restrict what software can
> view protected content. Since mplayer is not approved by
> systems, mplayer cannot view these files, and you will get
> unpredictable results if you try. The exception is DRM
> that have been defeated, such as CSS (any others?).
> Q: How do I find out if my file has DRM?
> A: ???
A: Check the source of your file. Did you download it off of a
website? If so, did you pay for it? If you paid, chances are that
your file has DRM. If not, the website should have that information
somewhere. Did you acquire this off of a P2P network? If so, the file
is most likely broken or spoofed.
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