Shaka player with Playready DRM report FAILED_TO_GENERATE_LICENSE_REQUEST error.(EDGE Broswer)

[tongwu460]

I am using attachment(3261225582(9).zip) manifiest play with Playready DRM in Shaka Demo V4.9.2 & got below error.
Appriciate if anyone can give some suggestion why this error report & How to fix it?
DRM:Verimatrix.
Video Codecs="hev1.2.4.L153.B0"
Auido codecs="mp4a.40.2"

Shaka Error DRM.FAILED_TO_GENERATE_LICENSE_REQUEST (Failed to execute 'generateRequest' on 'MediaKeySession': Initialization data for CENC is incorrect.,TypeError: Failed to execute 'generateRequest' on 'MediaKeySession': Initialization data for CENC is incorrect.,)

3261225582 (9).zip

[tongwu460]

@avelad can you pls give some suggestion?

[avelad]

I am not an expert in PlayReady, perhaps someone else in the community can help.

[BucherTomas]

@tongwu460 Your primary issue appears to be the value of ContentProtection descriptor within the mpd manifest.

As long as the descriptor consists of just cenc:pssh element as in your case, the Base64-encoded value must include the whole ISOBFF PSSH box including the PSSH header and the DRM SystemID followed by PSSH Data (in the case of PlayReady it's just XML PlayReady Header Object and its data size) while your value carries just the PSSH Data. This value must be used only with mspr:pro element of ContentProtection descriptor but not with cenc:pssh.

In other words, the value for cenc:pssh should be
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

instead of the current
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

Decode the Base64 strings to see the difference. That is why the PlayReady Content Decryption Module considers your shorter value invalid for initialization.

Further reading https://learn.microsoft.com/en-us/playready/specifications/mpeg-dash-playready#212-including-a-playready-object-in-the-mpd and https://www.w3.org/TR/eme-initdata-cenc/#example

[tongwu460]

Thanks for feedback, I will do the test and feedback result asap