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Thread: Firefox videos play with very slow audio

  1. #1
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    Kubuntu 19.04 Disco Dingo

    Firefox videos play with very slow audio

    Most web videos play fine for me in Firefox. Occasionally on Twitter I'll come across a video that plays with the audio track at very slow speeds like this one: https://twitter.com/ForTheRuleOfLaw/...49832424202241

    I've gone through the obvious suggestions at Firefox Support. I've cleared the cache and disabled uBlock Origin and Ghostery all to no avail. A Google search doesn't bring up other postings about this issue.

    I installed google-chrome-stable from the Google repository; it does not have this problem. Neither does chromium.

    I'm using Firefox 68.0.1 on Kubuntu 19.04.
    Last edited by SeijiSensei; 2 Weeks Ago at 09:37 PM.
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  2. #2
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    Re: Firefox videos play with very slow audio

    68.0.1 with uBlock running: plays just fine here on Xubuntu 18.04. I assume that you already tried an older kernel?

  3. #3
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    Re: Firefox videos play with very slow audio

    No, I haven't. Maybe that's the problem. It's strange that it's limited to certain videos though.

    Update: Dropped back from 5.0.0-21 to 5.0.0-20. No change. Now I get the broken-video graphic from Twitter, though I got that occasionally on the newer kernel as well.
    Last edited by SeijiSensei; 2 Weeks Ago at 09:53 PM.
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  4. #4
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    Re: Firefox videos play with very slow audio

    Quote Originally Posted by SeijiSensei View Post
    Most web videos play fine for me in Firefox. Occasionally on Twitter I'll come across a video that plays with the audio track at very slow speeds like this one: https://twitter.com/ForTheRuleOfLaw/...49832424202241
    Plays fine here with the latest Firefox Quantum 68.0.1. I believe that Firefox will use system FFmpeg for playback with some media files and this my be the issue on your system. FWIW I have a system install of the latest git FFmpeg here but I suspect a fully kitted-out version 4 and above would be equally as capable in this regard...
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