1863548 - Only the upper left corner of VP9 videos can be seen on Huawei Matepad

Status: UNCONFIRMED

(Core :: Audio/Video, defect)

Description

[rovingdisaster]

Attachment: firefox_vs_chromium.jpg

User Agent: Mozilla/5.0 (Android 10; Mobile; rv:121.0) Gecko/121.0 Firefox/121.0

Steps to reproduce:

Open any VP9 encoded video on Huawei Matepad (e.g. https://www.base-n.de/webm/VP9%20Sample.html)

Actual results:

Only the scaled upper left corner of a video can be seen

Expected results:

Browser should display a full-sized video

Comment 1

[rovingdisaster]

Attachment: about:support

Comment 2

[Jeff Boek [:boek]]

Hey can you please take a look at this one? :)

Comment 3

[BugBot [:suhaib / :marco]]

The severity field is not set for this bug.
:jimm, could you have a look please?

For more information, please visit BugBot documentation.

Comment 4

[Jim Mathies [:jimm]]

We don't have this device to test with unfortunately. Does this happen on web site video like youtube?

Comment 5

[rovingdisaster]

(In reply to Jim Mathies [:jimm] from comment #4)

We don't have this device to test with unfortunately. Does this happen on web site video like youtube?

Youtube automatically switches to AVC, which is displayed properly, though the device is capable to decode VP9. When media.mediasource.vp9.enabled is manually toggled on in about:config, only the magnified upper left corner of a youtube video can be seen then.

It seems that it is the same bug as in https://bugzilla.mozilla.org/show_bug.cgi?id=1825631. 101.0.0-beta.1 is the earliest version that can reproduce this bug for me, just like there, and that was a huawei device in this report too.