1831875 - [macOS] Shaka and mp4-h-264-video-test videos crash the gmpopenh264 plugin with media.gmp.decoder.multithreaded pref enabled

Status: RESOLVED WORKSFORME

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

Description

[Timea Zsoldos [:zstimi/tzsoldos], Desktop QA]

Attachment: Shaka.png

Found in

• Firefox 114.0a1 nightlytest channel

Affected versions

• Firefox 114.0a1 - nightlytest

Tested platforms

• Affected platforms: macOS 12
• Unaffected platforms: Ubuntu 22, Windows 10, macOS 11 aarch64

Preconditions

• media.gmp.decoder.enabled=true
• media.gmp.decoder.preferred=true
• media.gmp.decoder.multithreaded=true

Steps to reproduce

1. Open the following link: https://shaka-player-demo.appspot.com/ or https://html5videoplayer.net/html5video/mp4-h-264-video-test/
2. From drop-down Asset menu choose "Big Buck Bunny (LCEVC H264)".

Expected result

• The video should play and no crashes should occur.

Actual result

• The video does not play the gmpopenh264 plugin has crashed.

Regression range

• New feature.

Additional notes

• The plugin does not crash when media.gmp.decoder.multithreaded pref is false, the video is playing but the rendered quality is very bad see the attached screenshot (Shaka.png).
• Crash report:
  https://crash-stats.mozilla.org/report/index/f8b1f382-0e84-42bc-b950-9edca0230508
• The plugin does not crash on Ubuntu 22 and Windows 10, but the video appear janky when decoding using the OpenH264 2.3.2 plugin.
• If the media.gmp.decoder.multithreaded pref is on false html5video didn't crash, but the seeking to forward problem is not solved.

Comment 1

[Timea Zsoldos [:zstimi/tzsoldos], Desktop QA]

Testing on Private browsing window with all 3 pref on true, the video from link https://html5videoplayer.net/html5video/mp4-h-264-video-test/ loading a very long time, then if I seek the video control to forward the tab crashed, here is the crash report: https://crash-stats.mozilla.org/report/index/e90faf20-0257-4c87-a6ce-f52a30230509

Comment 2

[Andrew Osmond [:aosmond] (he/him)]

I think this means we can't ship with multithreaded decoding, so we'll keep it disabled by default. It was supposed to solve seeking issues but clearly it isn't completely resolved.

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

Closing because no crashes reported for 12 weeks.