Error 6001 on Widevine Android WebView playback with v4.13+ works with v4.12

[TcT2k]

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

If the problem is related to FairPlay, have you read the tutorial?

Not related

What version of Shaka Player are you using?

v4.15.4

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

Can you reproduce the issue with the latest code from main?
Yes tried nightly

Are you using the demo app or your own custom app?
Demo app in simple android application using a WebView

What browser and OS are you using?
Android 13, 14, 15

What are the manifest and license server URIs?

Widevine demo content from the demo

What configuration are you using? What is the output of player.getNonDefaultConfiguration()?

What did you do?

• Open a android application with WebView on Android 13, 14 or 15 (haven't tested other versions)
• Application allows DRM content via callback (otherwise no content can be selected in the demo)
• Start the demo with anything above version 4.12.18
• Filter Widevine content
• Press play

What did you expect to happen?
Playback should have started

When using version 4.12.18 everything works as expected. I've tried every version linked from here after that including nightly and I get Error 6001

On the same devices everything works fine in Chrome.

What actually happened?

Error 6001

Are you planning to send a PR to fix it?
No

[avelad]

@joeyparrish can you help here?

[avelad]

@TcT2k Without using a Webview, in Chrome for example, is it working?

[TcT2k]

On the same devices everything works fine in Chrome it's just a issue in WebViews

[avelad]

Are you using preferredKeySystems?

[TcT2k]

Are you using preferredKeySystems?

No, neither in my own code nor the shaka demo uses preferredKeySystems

[TcT2k]

I can still reproduce this issue. Is there anything else I can provide to help get this fixed?

[joeyparrish]

I have a guess at the cause. v4.12.18 works. The next version was v4.13.0, which included #7808. Could you please configure the app with:

player.configure('drm.defaultAudioRobustnessForWidevine', '');
player.configure('drm.defaultVideoRobustnessForWidevine', '');

If this change causes WebView to work again, then we can say #7808 was the cause. Then for a solution, we could do one of these:

1. change the defaults to ''
2. change the defaults to '' conditional on WebView being used
3. ask application developers to use the above configuration for WebView-based apps

[TcT2k]

Thank you for the reply. Your idea for the issue seems to be correct.

I've retested with the latest shaka player demo and added a custom asset with the robusness settings you provided and it works instantly.
At least with this content it was enough to set the defaultVideoRobustnessForWidevine.

From your proposed changes option 2 seems the best to me (if the Android WebView can be detected reliably)

Here is the JSON from the custom asset (just in case anybody needs to add it to the shakaPlayerDemoSavedAssets local storage:

,{"name":"Angel One DRM","shortName":"","iconUri":"","manifestUri":"https://storage.googleapis.com/shaka-demo-assets/angel-one-widevine/dash.mpd","source":"Custom","focus":false,"disabled":false,"extraText":[],"extraThumbnail":[],"extraChapter":[],"certificateUri":null,"description":null,"isFeatured":false,"drm":["No DRM protection"],"features":["VOD"],"licenseServers":{"__type__":"map","com.widevine.alpha":"https://cwip-shaka-proxy.appspot.com/no_auth"},"offlineLicenseServers":{"__type__":"map"},"licenseRequestHeaders":{"__type__":"map"},"requestFilter":null,"responseFilter":null,"clearKeys":{"__type__":"map"},"extraConfig":{"drm":{"defaultAudioRobustnessForWidevine":"","defaultVideoRobustnessForWidevine":""}},"extraUiConfig":null,"adTagUri":null,"imaVideoId":null,"imaAssetKey":null,"imaContentSrcId":null,"imaManifestType":null,"mediaTailorUrl":null,"mediaTailorAdsParams":null,"useIMA":true,"mimeType":null}

[avelad]

@joeyparrish can you implement this solution? Thanks!