Unable to play PlayReady DRM video offline

[softsara]

I have a video file placed in azure media server. The video file is MPEG-DASH protected and it requires JWT token, uses Software DRM. Video works fine when internet is available.

I wanted to play the same video in offline mode. Therefore I used AdaptiveMediaCache sample of https://github.com/flecoqui/Windows10/tree/master/Samples to achieve this. With this, i am able to download the video content and able to play the downloaded video content only if the internet is available. Because it requires the play ready license url https://xxxxxx.keydelivery.mediaservices.windows.net/PlayReady/.

However when there is no internet this service is not available to me. Therefore I receive the "Video could not be decoded" error in video player and "MF_MEDIA_ENGINE_ERR_DECODE : HRESULT - 0x8004110E" exception in MediaFailed event handler.

What i am missing here? Or how to cache or persist the playready license for offline play?

[flecoqui]

Currently this sample application only support Smooth Streaming Assets. DASH and HLS support will require a specific effort. The manifestCache.cs file needs to be updated to spport DASH and HLS:
https://github.com/flecoqui/Windows10/blob/master/Samples/AdaptiveMediaCache/cs/AdaptiveMediaCache/ManifestCache.cs#L796

Moreover, If you look at the sample streams there:
https://github.com/flecoqui/Windows10/blob/master/Samples/AdaptiveMediaCache/cs/AudioVideoPlayer/DataModel/MediaData.json
You'll see that some use "Non persistent" and "Persistent" license. In order to support offline video you need to use Persistent license.
For instance with PlayReady test servers:
Non Persistent:
http://playready.directtaps.net/pr/svc/rightsmanager.asmx?PlayRight=1&UseSimpleNonPersistentLicense=1
Persistent during a period of time:
http://playready.directtaps.net/pr/svc/rightsmanager.asmx?PlayRight=1&FirstPlayExpiration=600

You need to configure your backend to deliver persistent license.
At least, I didn't test this application with Azure Media Services JWT Token.
The sample there: https://github.com/flecoqui/Windows10/tree/master/Samples/TestMediaApp does support JWT Token Authentication.

Hope this helps,
Fred