Support persistent licenses and offline in Shaka v2 #343

snehapvs · 2016-04-18T12:02:19Z

Found many related issues to this but most of them move around shaka.media.EmeManager
http://v1-6-2.shaka-player-demo.appspot.com/docs/shaka.media.EmeManager.html which is not found in current version of shaka player.
Was this function completely removed? If so what is the alternative to have persistent license/licenses stored in shaka player in current API

tdrews · 2016-04-18T16:42:35Z

Hi,

EmeManager has been replaced by DrmEngine in Shaka v2. However, we have not integrated offline support into Shaka v2 yet. We will support DRM configuration for persistent licenses through player.configure() (see DRM tutorial and Advanced DRM Configuration) and add new APIs for storing and loading.

snehapvs · 2016-04-19T10:19:17Z

Will the persistent license or storing license service be availed on chrome desktop ?

I tried using "persistentstaterequired" parameter in DRM config, in the basic tutorial available from documentation . below is what I have included in player.configure option :

player.configure({
      drm: {
        servers: {
          'com.widevine.alpha': 'url',
        },
        advanced: {
            'com.widevine.alpha': {
              'persistentStateRequired':true
            }
          }  
      }
    });

Even without persistentStateRequired, Having advanced in the drm config is giving exception(error 6001). Is it because it is not handled in the current player's version.

tdrews · 2016-04-19T16:57:46Z

Desktop Chrome does not support persistent licenses at this time.

Error 6001 means the key system is not available for your content.
Does your MPD file specify Widevine protection?
If so, and you are on Windows, please check that "WidevineCdm" is listed at chrome://components.

snehapvs · 2016-04-20T07:13:06Z

I am on ubuntu (chrome)..and yes it is widevine protected.
doesnt support persistent licenses means..not supported by widevine or not supported by shaka player?

tdrews · 2016-04-20T16:59:18Z

Desktop Chrome does not support persistent licenses at this time.

Means Widevine on desktop Chrome does not support persistent licenses at this time.
Shaka v2 will eventually provide APIs to use persistent licenses.

Are you still having difficulties with player.configure()?
Are you able to play "Sintel 4K (multicodec, widevine)" from the demo page?
Are you able to play protected content if you use the default player configuration?

snehapvs · 2016-04-20T17:05:57Z

I was able to play widevine encrypted videos with normal drm configuration on player.configure. as i said earlier, when trying to use advanced options, the video is not being played.

tdrews · 2016-04-20T17:26:24Z

I'm having trouble reproducing the issue. What happens if you add

config.drm.advanced = {
  'com.widevine.alpha': {
    'persistentStateRequired': false
  }
};

right before https://github.com/google/shaka-player/blob/master/demo/asset_section.js#L150 ?

snehapvs · 2016-04-20T18:23:03Z

Following is the part of code I tried. No error on Windows but giving error on Linux on chrome browser in both cases.
function initPlayer() { var video = document.getElementById('video'); var player = new shaka.Player(video); window.player = player; alert("trueee"); player.configure({ drm: { servers: { 'com.widevine.alpha': 'license server url', }, advanced: { 'com.widevine.alpha': { 'persistentStateRequired':true } } } }); player.load(manifestUri).then(function() { }) } document.addEventListener('DOMContentLoaded', initApp);

tdrews · 2016-04-20T21:02:58Z

The following works for me on Chrome Linux 50.0.2661.75 and Chrome Linux 51.0.2704.7 with or without "advanced" settings using the master branch.

app.html:

<!DOCTYPE html>
<html>
  <head>
    <script src="shaka/third_party/closure/goog/base.js"></script>
    <script src="shaka/dist/deps.js"></script>
    <script src="shaka/shaka-player.uncompiled.js"></script>
    <script src="app.js"></script>
  </head>
  <body>
    <video id="video" width="640" controls autoplay></video>
  </body>
</html>

app.js:

var manifestUri = '//storage.googleapis.com/shaka-demo-assets/sintel-widevine/dash.mpd';

function initApp() {
  shaka.polyfill.installAll();
  shaka.Player.support().then(function(support) {
    if (support.supported) {
      initPlayer();
    } else {
      alert('Browser not supported!');
    }
  });
}

function initPlayer() {
  shaka.log.setLevel(shaka.log.Level.V1);

  var video = document.getElementById('video');
  var player = new shaka.Player(video);

  window.player = player;
  player.addEventListener('error', onErrorEvent);    

  player.configure({
    drm: {
      servers: { 'com.widevine.alpha': '//widevine-proxy.appspot.com/proxy' },
      advanced: {
        'com.widevine.alpha': {
          'persistentStateRequired': true
        }
      }
    }
  });

  player.load(manifestUri).then(function() {
    console.info('Manifest loaded!');
  }).catch(onError);
}

function onErrorEvent(event) { onError(event.detail); }
function onError(error) { console.error(error); }

document.addEventListener('DOMContentLoaded', initApp);

Does this work? If not, which version of Chrome are you using? What does shaka/support.html say? What log messages do you get in the console after trying the above?

snehapvs · 2016-04-20T21:13:46Z

Let me try it and before that what do you conclude on persistent license on chrome desktop? Can we expect it in near time?

tdrews · 2016-04-20T21:34:09Z

Persistent licenses on desktop Chrome is a desirable feature; however, I can't give you any expectations of when it would be implemented.

snehapvs · 2016-04-21T05:45:11Z

Hello the above code is working on Linux (ubuntu) as well.However If I can't get a persistent license on chrome Desktop, I doesn’t need persistent parameter there. Thanks

tdrews · 2016-04-21T17:00:13Z

Good to hear that that code works. I'll leave this issue open to track progress for offline support.

soualid · 2016-04-29T11:35:20Z

Sorry but after reading this thread, I am not sure to understand : does the offline support for Widevine is actually implemented on Chrome Desktop ? Is it implemented in Shaka Player version 1.6 ? Is it for Shaka Player version 2.0 ?

Many thanks in advance for clarifying this.

tdrews · 2016-04-29T17:07:50Z

Widevine on desktop Chrome does not support persistent licenses, specifically it does not support persistent-usage-record or persistent-license MediaKeySessionTypes.
Shaka v2 does not provide offline support yet (i.e., APIs to use persistent licenses and to store/load content).
Shaka v1 does provide offline support.

We will implement offline support in Shaka v2, but keep in mind that offline support (as defined above) is implemented at the JavaScript level; it is separate from persistent license support, which is implemented at the browser/key-system level.

soualid · 2016-04-29T20:50:43Z

Many thanks. If I understand well and for now, no DRM vendor support persistent license for offline usage on desktop through EME.

And this has, of course, nothing to do with Shaka player. Thank you again for clarifying this.

joeyparrish · 2016-05-02T12:49:41Z

Widevine currently supports persistent licenses on ChromeOS.

This is the bug to track Widevine persistent license support on Chrome for Android: https://bugs.chromium.org/p/chromium/issues/detail?id=493521

The great thing about JavaScript running on top of standard APIs is that if and when a DRM vendor supports persistent licenses on desktop through EME, a Shaka-based application will have access to that capability without any changes.

This is part of the v2 equivalent of the ContentDatabase. This only manages low-level interactions with the IndexedDB and wraps all actions in Promises. This also adds an in-memory version that is used for testing. Issue #343 Change-Id: I0d296639e74c1d4cab232ce7248b03a353b38b3c

This contains two major parts: the Storage class, which manages storing, listing, and deleting the stored content, and the offline manifest parser, which loads the stored content into a manifest so the Player can play it. This does not include support for storing encrypted content. The EME sessions will not be stored properly and will fail to play. Issue #343 Change-Id: I7ecb3400391ec8100155aa972f9b09bb7ae24d9d

Issue #343 Change-Id: I66d2b57f6d7db8b0666916f951ba434337fac43a

Issue #343 Change-Id: I8c2ff4b2dd1777f28b1dd427527c83576ca8fcbc

chetanshelake · 2016-09-02T12:30:20Z

Hello friend,
Shaka player repository is a great repository for html5 player. I have integrate shaka player in my website and it work fine.
I have some issues with that -

I am unable to display buffer progress bar.
confused about
- if video played to some duration like 1 or 2 min and i try to start from first then it start again buffering but this content already buffered from server.
  How can i avoid re-streaming for each video?
  I have search much more related that but i can't found any solution
  if any one have solution related that please help me

Thank & regards
chetan shelake

joeyparrish · 2016-09-02T15:17:49Z

@chetanshelake, thanks for your interest in Shaka Player. Your comments are unrelated to this issue. Please file a new issue or write to our mailing list for support.

tdrews added this to the v2+ milestone Apr 18, 2016

tdrews added the type: enhancement New feature or request label Apr 18, 2016

tdrews changed the title ~~Persistent licenses in shaka player~~ Support persistent licenses and offline in Shaka v2 Apr 18, 2016

tdrews self-assigned this Apr 20, 2016

tdrews removed their assignment Apr 21, 2016

joeyparrish modified the milestones: v2.0.0, v2+ Apr 27, 2016

joeyparrish assigned TheModMaker May 2, 2016

shaka-bot pushed a commit that referenced this issue Jun 10, 2016

Add offline support to demo app.

40f12eb

Issue #343 Change-Id: I66d2b57f6d7db8b0666916f951ba434337fac43a

shaka-bot pushed a commit that referenced this issue Jun 10, 2016

Design doc for offline

63e793b

Issue #343 Change-Id: I8c2ff4b2dd1777f28b1dd427527c83576ca8fcbc

shaka-bot closed this as completed in 6cc9613 Jun 16, 2016

shaka-bot added the archived label Mar 22, 2018

shaka-project locked and limited conversation to collaborators Mar 22, 2018

shaka-bot added the status: archived Archived and locked; will not be updated label Apr 15, 2021

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Support persistent licenses and offline in Shaka v2 #343

Support persistent licenses and offline in Shaka v2 #343

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Support persistent licenses and offline in Shaka v2 #343

Support persistent licenses and offline in Shaka v2 #343

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