Video Playback issues with LibreWolf (Firefox based), not present in Brave (Chromium based)

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1

Due to the manifest v2 deprecation, i decided to give LibreWolf a try. However, i noticed that there’s some video playback issues that i’m using with YouTube where if I try to scrub around different parts of the video, the video itself can freeze on a frame but the audio continues playing.

If I do this enough times, YouTube will give me a playback issue.

  • I have enhanced 264ify blocking all videos except for AVC and 60FPS
  • I am using the same extensions that I currently have on Brave (I also installed a Firefox theme, i don’t think that should be an impact)
  • I enabled VAAPI by following instructions on how to enable hardware acceleration in Arch Wiki
  • I tried changing media.wmf.zero-copy-nv12-texture and gfx.direct3d11.reuse-decoder-device to false then restart
  • I tried disabling hardware acceleration in preferences

Nothing works.

2

I’ve also noticed that the video sometimes stutters in frames too.

3

I’ve been noticing that if I disable VP9, it seems to cause this issue for some odd reason with 264ify or even through about:config.

4

Hi

Do you have ffmpeg-7 installed?

sudo zypper in ffmpeg-7

youtube also sometimes doesn’t play nice with ublock.

ublock icon -> my filters add this:

www.youtube.com##+js(nano-stb, resolve(1), *, 0.001)

click Apply Changes in top left corner.

Hope this is of help.

5

I have ffmpeg-7. Not sure about UBlock being the issue but worked fine on Brave.

For now, it works as long as I have media.wmf.zero-copy-nv12-texture and gfx.direct3d11.reuse-decoder-device to false and not using 264ify to restrict to only AVC, it’s solid.

6

It turns out that it happens when video is playing in AVC1 codec on YouTube. I don’t know why…

7

It happens on stock Firefox that comes with Tumbleweed as well with NO EXTENSIONS and any CUSTOM CONFIGURATIONS.

8

Footage of it happening (not sure if it happens in AV01 but definitely happens in AVC1). The video is muted on YouTube so you won’t hear sound but sound plays just fine.

9

It still happens in Version 129.0-1. The version that had this problem first occurred in Version 128.0-1.

10

I just installed Linux Mint on my other device running the same extension and version of LibreWolf. It doesn’t happen on that device.

11

The answer to this is that I did not install multimedia codecs properly. My goofy ahh either forgot to run opi codec or denied it simply because I saw that it uses Packman repository. I took a shot at it and now those stuttering issues with AVC1 are gone.

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