1643531 - YouTube and other videos not playing

Status: RESOLVED DUPLICATE of bug 1643411

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

Description

[Chris Karlof [:ckarlof]]

Below is a link to a screen capture of trying to playback this video (Mozilla employees only): https://www.youtube.com/watch?v=BD24QjP2oLQ

https://drive.google.com/open?id=1UIZpGOdvVK5_tiZ_PovDIj5J9PXuo-2g

I get audio, but video immediately freezes. My other Mac with Nightly seems to be fine, but this is reproducible for all videos for me on this computer. I am also have the problem on Beta, but not on Release. Let me know how I can provide more debugging information.

Comment 1

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

Could you navigate to about:config edit:about:support and copy the information from there onto this bug? Could you also capture a profile using the media preset in the Firefox profiler and attach it here?

Comment 2

[Chris Karlof [:ckarlof]]

Attachment: about.config

Comment 3

[Chris Karlof [:ckarlof]]

I captured this profile: https://share.firefox.dev/3h1BYl8

from watching this: https://www.youtube.com/watch?v=gAaHNYxkS_E

Clean user profile running up to date Nightly.

Comment 4

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

Sorry, I meant about:support in comment 1.

Comment 5

[Chris Karlof [:ckarlof]]

Attachment: about:support

Comment 6

[Chris Karlof [:ckarlof]]

about:support uploaded

Comment 7

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

I'm not sure if the capture in comment 0 would contain audio if any was playing, so looking to clarify some details.

• When this happens does the audio keep playing and it's just the video that freezes? Or does everything freeze (i.e. no audio)?
• Do you see any output in the web console (Tools -> Web Developer -> Web Console)?

Comment 8

[Erwann Mest :kud]

I've got the same. Twitter, Instagram, Tiktok, Dailymotion work. YouTube and Netflix don't.

Comment 9

[Chris Karlof [:ckarlof]]

(In reply to Bryce Seager van Dyk (:bryce) from comment #7)

I'm not sure if the capture in comment 0 would contain audio if any was playing, so looking to clarify some details.

• When this happens does the audio keep playing and it's just the video that freezes? Or does everything freeze (i.e. no audio)?

Correct.

• Do you see any output in the web console (Tools -> Web Developer -> Web Console)?

Well, hmm. I'm still running build 20200605043926 and now Facebook, Netflix, and YouTube are all working normally again. I'm not sure what changed. Yesterday and all week those sites were broken for me.

Comment 10

[Chris Karlof [:ckarlof]]

I updated to 20200607093436 and videos continue to play properly.

Comment 11

[Erwann Mest :kud]

To be honest, this bug comes quite in the same time that the fix done about Google Meet for the video.

79.0a1 (2020-06-08) (64-bit) and still not working for the moment.

Comment 12

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

(In reply to Chris Karlof [:ckarlof] from comment #9)

Well, hmm. I'm still running build 20200605043926 and now Facebook, Netflix, and YouTube are all working normally again. I'm not sure what changed. Yesterday and all week those sites were broken for me.

Does the issue still happen on beta? Could you use mozregression-gui to look for the changes introducing the problem?

Comment 13

[Chris Karlof [:ckarlof]]

(In reply to Chris Karlof [:ckarlof] from comment #10)

I updated to 20200607093436 and videos continue to play properly.

This morning, video playback has regressed again to the behavior I originally reported (audio plays and video freezes after the first frame). I'm still on 20200607093436 and haven't restarted or updated.

Comment 14

[Chris Karlof [:ckarlof]]

(In reply to Bryce Seager van Dyk (:bryce) from comment #12)

(In reply to Chris Karlof [:ckarlof] from comment #9)

Well, hmm. I'm still running build 20200605043926 and now Facebook, Netflix, and YouTube are all working normally again. I'm not sure what changed. Yesterday and all week those sites were broken for me.

Does the issue still happen on beta? Could you use mozregression-gui to look for the changes introducing the problem?

When I first reported this, it was broken on Beta and Nightly for me, but Release was working fine. I'll try to find time later today to use mozregression.

Comment 15

[Chris Karlof [:ckarlof]]

(In reply to Erwann Mest from comment #11)

To be honest, this bug comes quite in the same time that the fix done about Google Meet for the video.

79.0a1 (2020-06-08) (64-bit) and still not working for the moment.

Erwann, what commit is that? I can keep an eye out when I do the regression analysis.

Comment 16

[Erwann Mest :kud]

As @bryce asked me, my about:support in attachment.

Comment 17

[Erwann Mest :kud]

Attachment: Application Basics - kud

Comment 18

[Erwann Mest :kud]

This one @ckarlof : https://bugzilla.mozilla.org/show_bug.cgi?id=1638758

Comment 19

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

In about:config could you try toggling media.av1.enabled to false and see if that has any impact? It should require a page reload but not a restart to take effect. The pref can be reset after testing.

Comment 20

[Erwann Mest :kud]

It doesn't change anything, no, sorry.