1790244 - NS_ERROR_DOM_MEDIA_FATAL_ERR when trying to play ClearKey EME DRM video on Apple Silicon

Status: NEW

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

Description

[Chris Peterson [:cpeterson]]

Attachment: screenshot.png

Steps to reproduce

1. In Firefox on a Mac with Apple Silicon, load this ClearKey video player:

https://nightly-dot-shaka-player-demo.appspot.com/demo/#audiolang=en-US;textlang=en-US;uilang=en-US;asset=https://storage.googleapis.com/shaka-demo-assets/angel-one-clearkey/dash.mpd;panel=ALL_CONTENT;panelData=drm:CLEAR_KEY;build=debug_compiled

I don't have an Intel Mac, so I can't test whether this error affects all Macs or only Apple Silicon.

Expected result

The ClearKey video should play.

Actual result

The ClearKey video fails to play and the page shows an error message:

Shaka Error MEDIA.VIDEO_ERROR (3,,NS_ERROR_DOM_MEDIA_FATAL_ERR (0x806e0005) - mozilla::MediaResult mozilla::AppleVTDecoder::InitializeSession(): Couldn't create decompression session!)

I bisected this regression to 2020-12-01:

https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=d9b0105477475ee9d411fdd67d37b1774aedb3da&tochange=71ca5351d995d6a8a91a2a7c04191d13557da546

Unfortunately, I can't pinpoint the regressing changeset because no mozilla-central or autoland builds are archived for such old builds, but the regression range includes two suspicious changesets that might be the cause:

• bug 1678445: GMP crash on Apple Silicon
• bug 1679356: VP9 hardware decoder not available on Apple Silicon

Comment 1

[Francesco Lodolo [:flod]]

(In reply to Chris Peterson [:cpeterson] from comment #0)

I don't have an Intel Mac, so I can't test whether this error affects all Macs or only Apple Silicon.

Works fine on Intel Mac.

Comment 2

[Chris Peterson [:cpeterson]]

It also works fine on Intel Windows.

Comment 3

[Ryan VanderMeulen [:RyanVM]]

John, is this something you can look at?

Comment 4

[C.M.Chang[:chunmin]]

I am on PTO. I'll take a look at this once I am back.