Question about enabling offline playback

[re-jim]

Assuming I'm using this asset and license server, respectively:
http://wvm.ezdrm.com/demo/stream.mpd
http://widevine-dash.ezdrm.com/proxy?pX=BF9CEB

Once I have what is needed to get playback, would there be any way to store pieces of information locally so that I can reuse this when offline, as long as the license hasn't yet expired, or would this be impossible by design? For example, if I were to capture the response from the license server, and use it a second time, would that work?

If this should theoretically work, what pieces of information would I need to store in order to enable this?

[tanalam]

Hi,
W3C EME spec does support persistence license. When you create session the type of the session should be of this type and it should work (given the underlying DRM/System has implemented this specification)

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https://www.w3.org/TR/encrypted-media/#idl-def-MediaKeySessionType.persistent-license
persistent-license-
Sessions of this type can only be created if the configuration associated with the MediaKeySystemAccess object that created this object has a persistentState value of "required". The session must be loadable via its Session ID once update() is called successfully. A message of type "license-release" containing the record of license destruction will be generated when remove() is called until the record is acknowledged by a response passed to update().