1269230 - WMF with D3D11 intermittently reporting that it can't play AAC

Status: RESOLVED WORKSFORME

(Core :: Audio/Video: Playback, defect, P1)

Description

[Jean-Yves Avenard [:jya]]

Seen in https://treeherder.mozilla.org/#/jobs?repo=try&revision=09bb6f56096ebecec4a93f9d2448531c350d61fe

the intermittent failures, are due to errors like:
JavaScript error: http://mochi.test:8888/tests/dom/media/mediasource/test/test_WaitingToEndedTransition_mp4.html, line 18: NotSupportedError: Operation is not supported 

JavaScript error: http://mochi.test:8888/tests/dom/media/mediasource/test/test_WaitingOnMissingData_mp4.html, line 18: NotSupportedError: Operation is not supported 

those are: var audiosb = ms.addSourceBuffer("audio/mp4");

addSourceBuffer("audio/mp4"); can only return false if the pref media.mediasource.mp4.enabled is false of if CanPlayType("audio/mp4") returned false which can only happen if WMFDecoderModule::SupportsMimeType returned false.

Sometimes the error was, but with some weird line number:
JavaScript error: , line 0: InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable 

line 0 ??

Comment 1

[Gerald Squelart (he/him) (not at Mozilla since 2022-09-15)]

Wondering if this could have the same cause as surmised in bug 1268379 comment 2, (i.e., WMF capabilities check triggered by GMP load is now done very near startup, which somehow messes with things); doesn't seem likely, but I need straws to grasp!
I'm exploring that path now, feel free to try other ideas.

Comment 2

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

Is it possible that we have some test machines running Windows N/KN?

Comment 3

[Jean-Yves Avenard [:jya]]

this was my first guess, however in this run: https://treeherder.mozilla.org/#/jobs?repo=try&revision=09bb6f56096ebecec4a93f9d2448531c350d61fe

the first machine to have failed was t-w864-ix-122 here:
https://treeherder.mozilla.org/logviewer.html#?job_id=20208306&repo=try

however, 122 has succeeded in other runs like here: https://treeherder.mozilla.org/logviewer.html#?job_id=20202851&repo=try

Comment 4

[Blake Wu [:bwu][:blakewu]]

James, 
Can you have a look?

Comment 5

[James Cheng[:JamesCheng]]

ok, it seems this issue was one year ago.

Let me try if I can reproduce it first.

Comment 6

[James Cheng[:JamesCheng]]

I cannot reproduce this issue locally(run until fail + repeat 1000 times) and by try push(repeat 20 * 3pushes = 60 times).

Perhaps it is fixed accidentally.

we could consider to close this and reopen it once we got the same errors.

Comment 7

[James Cheng[:JamesCheng]]

Please feel free to reopen it if this issue can still be reproduced.

Thanks.