Fairplay launch the error always "FAILED_TO_GENERATE_LICENSE_REQUEST" but with the Apple demo page it's working

Have you read the FAQ and checked for duplicate open issues? Yes

What version of Shaka Player are you using? 2.5.0

Can you reproduce the issue with our latest release version? Yes

Can you reproduce the issue with the latest code from master? Yes

Are you using the demo app or your own custom app? Demo app

If custom app, can you reproduce the issue using our demo app?

What browser and OS are you using? Safari 12.1 over Mojave

For embedded devices (smart TVs, etc.), what model and firmware version are you using?

What are the manifest and license server URIs?

There is a discussion already started by mail with the link

What did you do?

Load a Fairplay stream

What did you expect to happen? Works without problem

What actually happened?

but the video works (Note, that the screen is in blank due to Fairplay)

Note: I changed the custom.js in the demo to support Fairplay with the next change: const commonDrmSystems = new Set([ ‘com.widevine.alpha’, ‘com.microsoft.playready’, ‘com.adobe.primetime’, ‘com.apple.fps.1_0’, ‘org.w3.clearkey’, ]);

[bcupac]

Having the same issue as @KieronAllsop. Init data is generated 2 times, first time the DRM flow passes, and second time it throws FAILED_TO_GENERATE_LICENSE_REQUEST error. The stream can be played. Found out that encrypted event is triggered twice, so if in drm_engine.js I change:

// Explicit init data for any one stream or an offline session is
// sufficient to suppress 'encrypted' events for all streams.
      const cb = (e) => this.newInitData(
          e.initDataType, shaka.util.BufferUtils.toUint8(e.initData));
      this.eventManager_.listen(this.video_, 'encrypted', cb);

to

// Explicit init data for any one stream or an offline session is
// sufficient to suppress 'encrypted' events for all streams.
      const cb = (e) => this.newInitData(
          e.initDataType, shaka.util.BufferUtils.toUint8(e.initData));
      this.eventManager_.listenOnce(this.video_, 'encrypted', cb);

it goes away. Not sure what this in-code comment means, should this somehow already be suppressed to trigger just once?

[KieronAllsop]

Having just integrated against shaka 2.5.2 I can confirm this is an issue and hope that the following debug helps. This is in Safari in Mojave.

For a single key encrypted fairplay asset there are two sessions created, one with the correct initData and second one containing skd://uuid as the initData.

[Log] PatchedMediaKeysApple.onWebkitNeedKey_ ? WebKitMediaKeyNeededEvent {isTrusted: true, initData: Uint8Array, type: "webkitneedkey", ?} (patchedmediakeys_apple.js, line 611)
WebKitMediaKeyNeededEvent {isTrusted: true, initData: Uint8Array, type: "webkitneedkey", target: <video id="video">, currentTarget: <video id="video">, ?}WebKitMediaKeyNeededEventbubbles: falsecancelBubble: falsecancelable: falsecomposed: falsecurrentTarget: nulldefaultPrevented: falseeventPhase: 0initData: Uint8Array [84, 0, 0, 0, 115, 0, 107, 0, 100, 0, ?]Uint8Array (88)isTrusted: truereturnValue: truesrcElement: <video id="video"><video id="video">target: <video id="video"><video id="video">timeStamp: 1554type: "webkitneedkey"WebKitMediaKeyNeededEvent Prototype
[Debug] Creating new temporary session (drm_engine.js, line 1093)
[Log] PatchedMediaKeysApple.MediaKeys.createSession (patchedmediakeys_apple.js, line 324)
[Log] PatchedMediaKeysApple.MediaKeySession (patchedmediakeys_apple.js, line 408)
[Log] PatchedMediaKeysApple.MediaKeySession.generateRequest (patchedmediakeys_apple.js, line 448)
[Log] MyDebug: initData: Tskd://3e44...etc             (patchedmediakeys_apple.js, line 450)                    <= CORRECT
[Log] MyDebug: sessionId: 776d1488-e456-4859-aa7a-afe4c6e5eaeb (patchedmediakeys_apple.js, line 460)
[Debug] Key status changed for session - "" (drm_engine.js, line 1400)
[Debug] Creating new temporary session (drm_engine.js, line 1093)
[Log] PatchedMediaKeysApple.MediaKeys.createSession (patchedmediakeys_apple.js, line 324)
[Log] PatchedMediaKeysApple.MediaKeySession (patchedmediakeys_apple.js, line 408)
[Log] PatchedMediaKeysApple.MediaKeySession.generateRequest (patchedmediakeys_apple.js, line 448)
[Log] MyDebug: initData: skd://3e44d6d7-15a8-45c6-b4ec-c53c76fb70a7 (patchedmediakeys_apple.js, line 450)       <= INCORRECT
[Log] MyDebug: sessionId: da9a72b6-8a50-4210-9ad9-040f6db51727 (patchedmediakeys_apple.js, line 460)

The second session then gives the following error which results in the “FAILED_TO_GENERATE_LICENSE_REQUEST” error we are seeing.

[Log] PatchedMediaKeysApple.onWebkitKeyError_ - Event {isTrusted: true, type: "webkitkeyerror", target: WebKitMediaKeySession, ?} (patchedmediakeys_apple.js, line 705)
Event {isTrusted: true, type: "webkitkeyerror", target: WebKitMediaKeySession, currentTarget: WebKitMediaKeySession, eventPhase: 2, ?}Eventbubbles: falsecancelBubble: falsecancelable: falsecomposed: falsecurrentTarget: nulldefaultPrevented: falseeventPhase: 0isTrusted: truereturnValue: truesrcElement: WebKitMediaKeySession {error: WebKitMediaKeyError, keySystem: "com.apple.fps.1_0", sessionId: "da9a72b6-8a50-4210-9ad9-040f6db51727", onwebkitkeyadded: null, onwebkitkeyerror: null, ?}WebKitMediaKeySessiontarget: WebKitMediaKeySession {error: WebKitMediaKeyError, keySystem: "com.apple.fps.1_0", sessionId: "da9a72b6-8a50-4210-9ad9-040f6db51727", onwebkitkeyadded: null, onwebkitkeyerror: null, ?}WebKitMediaKeySessiontimeStamp: 1578type: "webkitkeyerror"Event Prototype
[Log] MyDebug: sessionId: da9a72b6-8a50-4210-9ad9-040f6db51727 (patchedmediakeys_apple.js, line 706)

The first session created (with the correct initData) completes and the content plays.

[Info] LicenseRequest Success - Updating CDM (drm_engine.js, line 1209)
[Log] PatchedMediaKeysApple.MediaKeySession.update (patchedmediakeys_apple.js, line 493)
[Log] PatchedMediaKeysApple.onWebkitKeyAdded_ ? Event {isTrusted: true, type: "webkitkeyadded", target: WebKitMediaKeySession, ?} (patchedmediakeys_apple.js, line 679)
Event {isTrusted: true, type: "webkitkeyadded", target: WebKitMediaKeySession, currentTarget: WebKitMediaKeySession, eventPhase: 2, ?}Event