Silverlight - Determine if a wma is protected by DRM

StackOverflow https://stackoverflow.com/questions/1929244

  •  20-09-2019
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Question

Is there a way to determine if a wma file is DRM'd? I'd like to be able to do this in a trusted, out of browser Silverlight 4 application so pinvoke isn't an option. I supposed I could just try to play the file in a MediaElement but that doesn't seem efficient.

Was it helpful?

Solution

Yes, check the MediaElement State during StateChanged event and you should be able to figure out if the video is DRMed or not.

There's a code sample @ "Digital Rights Management (DRM) - Detecting DRM State".

Quick word of friendly advise, since you're obviously going to work with DRM in Silverlight and you're lacking basic knowledge how that works - read the whole article. It'll do you a world of good.

OTHER TIPS

Is file local or remote? For a local file you can read first N Kb of a file, parse ASF header and check if WMDRM headers are present.

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