Dash.js: [2.8.0] DataView: expected ArrayBuffer, got Uint8Array

[boris-petrov]

This is a regression from 2.7.0:

at new DataView (<anonymous>)                                                                                                                     
at Function.getPSSHData (...)         
at Object.onKeyMessage (...)

I don't have exact lines, I could get them if needed. The error under Firefox is the one in the title, under Chrome is TypeError: First argument to DataView constructor must be an ArrayBuffer.

In this issue there is more information about our usecase (we use Clearkey encryption e.g.) - it hasn't changed since then.

Please tell me if you need more information.

[nicosang]

Hi @boris-petrov ,

I 'd like to help you but I can't reproduce the issue with streams in dash.js reference page. Is it possible that you give us acces to one of your stream?

Nico

[boris-petrov]

@nicosang - thanks for the answer! Can you try with the ones I've attached in this comment in the other thread that I linked please? They are the same as the ones we use (they are autogenerated with ffmpeg for test purposes).

[nicosang]

@boris-petrov , could you, please, also share dash.js log messages? I don't have the same behavior that the one you described...

Thanks,

[nicosang]

one more question for you @boris-petrov : do you use the call to setProtectionData function?

[boris-petrov]

@nicosang - no, we don't use that particular function. We do exactly what I've written in this comment from the other thread. As for the log messages - I'll do that most likely on Monday. Thanks for the support!

[boris-petrov]

@nicosang - here are the logs:

[5][MediaPlayer] [dash.js 2.8.0] MediaPlayer has been initialized
[6][Protection] EME detected on this user agent! (ProtectionModel_21Jan2015)
[8][MediaPlayer] Streaming Initialized
[12][MediaPlayer] Playback Initialized
[25][DashParser] Parsing complete: ( xml2json: 3.60ms, objectiron: 0.200ms, total: 0.00380s)
[32][ManifestUpdater] Manifest has been refreshed at Mon Jul 09 2018 13:58:34 GMT+0300 (Eastern European Summer Time)[1531133914.201]
[37][PlaybackController] Native video element event: play
[39][PlaybackController] Native video element event: waiting
[57][Stream] No text data.
[58][Stream] No fragmentedText data.
[58][Stream] No embeddedText data.
[58][Stream] No muxed data.
[58][Stream] No image data.
[102][BufferController][video] Init fragment finished loading saving to video's init cache
[105][ScheduleController][video] OnFragmentLoadingCompleted - Url: http://127.0.0.1:8081/some-url/drm%2Ftest-videoStream.mp4
[107][BufferController][audio] Init fragment finished loading saving to audio's init cache
[109][ScheduleController][audio] OnFragmentLoadingCompleted - Url: http://127.0.0.1:8081/some-url/drm%2Ftest-audioStream.mp4
[114][ProtectionController] DRM: KeySystem Access Granted (org.w3.clearkey)!  Selecting key system...
[116][PlaybackController] Native video element event: loadedmetadata
[120][ScheduleController][video] Top quality video index has changed from undefined to 0
[123][ScheduleController][audio] Top quality audio index has changed from undefined to 0
Error: [130][ProtectionKeyController] Failed to retrieve clearkeys from ProtectionData

Actually, now that I see, there is another error before the one I've specified in this issue thread - Failed to retrieve clearkeys from ProtectionData. Any ideas why that might be and what may have changed between 2.7.0 and 2.8.0?

[davemevans]

Looks to me like that is caused by the debug.warn call in KeySystemW3CClearKey.getClearKeysFromProtectionData - there's no warn method on debug - a getLogger or similar is needed I imagine.

Would be useful if the catch in processClearKeyLicenseRequest logged the message from the exception.

[boris-petrov]

So I am to understand that this indeed is a bug, right? Not some wrongdoing on my side?

[nicosang]

There is indeed a small bug in the logger of KeySystemW3CClearKey. I'm fixing it....

[nicosang]

@boris-petrov , could you, please, take a look at my PR? Does it fully fix your issue?

thanks,
Nico

[boris-petrov]

@nicosang - yes, this branch fixes the issue.

[Murmur]

Please see this example player, I can use laurl for ClearkeyDRM system but kid:key option does not work. I have used a latest and nightly dash.js script. Is this fix still missing from the nightly build?

https://m.dtv.fi/dash/index_clearkey2b.html?video=21

mpd=https://m.dtv.fi/dash/dasherh264v2/drm/manifest_clearkey.mpd
kid=QyFWeBI0EjQSNBI0EjQSNA==
key=EjQSNBI0EjQSNBI0EjQSNA==

This one works fine using a ClearkeyDRM laurl option.
https://m.dtv.fi/dash/index_clearkey2.html?video=21