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Just Lemons
Participant
Nov 6, 2019 3:19 PM UTC
Question

After Effects 2020 stuck at "Initializing Mediacore" at launch, macOS

Hi,

I was opening After Effects CC2020 for the first time, and it won't open because it hangs/gets stuck on 'Initializing Mediacore." I've uninstalled and reinstalled, as well as restarted multiple times. I have a Macbook Pro, and any help is appreciated. 🙂

 

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35 replies

Arihant36120005e1e2
Participant
Nov 17, 2024 2:43 PM UTC

Try deleting and restoring the newest plugin installed. It worked for me

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kind_person5DEE
kind_person5DEE
Participant
Apr 21, 2022 9:11 PM UTC

Hi, from 2022.. i was fixed this issue with simple solution, just ignore recent update and back to your previous version. it's work..

In case, i was installed after effect 2022 version 22.3 and it was stucked in Initializing Mediacore, all of way from this discussion is not working for me, then i just initiate to downgrade to previous version ; 22.2 and it back normaly. Also, don't forget to downgrade media encoder with same version. it work too for premiere.. Good luck

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    defaulttq99olh7t308
    Participant
    Jun 19, 2021 12:09 PM UTC

    Hi, when installing plug-ins I can't start After Effects because it gets stuck in Initialize MediaCore. Any solution?

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    Fabio5E62
    Participant
    Jun 19, 2021 12:18 PM UTC

    Install: Resolume Alley!

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    leeblair
    Participant
    Dec 24, 2020 1:39 PM UTC

    Hey guys - this too has boggled my mind for years... but for me (Windows 10), I had to go to

    Adobe After Effects 2020/Support Files/(Media Core plug-ins)/Common

    and rename the ExporterAVI.prm to ExporterAVI.old and then it would launch without issue!

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    Criizon5E39
    Participating Frequently
    Jan 3, 2021 11:36 AM UTC

    Didn't work for me 😞

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    Fabio5E62
    Participant
    Apr 28, 2021 1:13 PM UTC

    Install: Resolume Alley!

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    dominics65875959
    dominics65875959
    Inspiring
    Nov 13, 2020 12:30 PM UTC

    I'm experiencing the same problem, and have tried unsuccessfuly the various fixes suggested on this page

    Windows i9 processor; 128G RAM; separate SSD drive for cache

    After Effects + Premiere taking over 5 minutes to load

    Premiere 2020 controls also so unresponsive, it's literally unusable 

    Had several trouble shooting sessions with an Adobe expert online.

    As a last resort he suggested reinstalling Windows.

    My case file was closed prematurely, before discovering that reinstalling Windows didn't solve the problem.

    He hasn't replied to my email about this.

    Apart from all that, really happy with Adobe right now...

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      JBCM Media Production
      JBCM Media Production
      Participating Frequently
      Dec 18, 2020 10:15 PM UTC

      Any updates? The only way I can get After Effects to run it to rename the MediaCore folder

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      bwaz
      Participant
      Dec 18, 2020 10:23 PM UTC

      No, which is amazingly frustrating! Adobe did an update to my Premiere, and when I opened it to finish a taks, it re-loaded the ExportAVI.PRM file and I had to search around to find it, and remove it. ADOBE???

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        nishu_kush
        nishu_kush
        Legend
        Apr 8, 2020 10:32 AM UTC

        Hi all,

         

        Thanks for reaching out. Third-party plug-ins, which are installed in the MediaCore folder can cause After Effects to stuck at "Initializing Mediacore" during launch. As suggested by @bwaz, try renaming or removing the plug-ins from the MediaCore folder and see if it brings any change. Location of the folder:

         

        macOS - HD > Library > Application Support > Adobe > Common > Plugins > 7.0 > Media Core

        Windows - C:\Program Files\Adobe\Common\Plug-ins\7.0\MediaCore

        Let us know if it helps.

         

        Thanks,

        Nishu

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          bwaz
          Participant
          Apr 8, 2020 3:59 PM UTC

          I found that its the Common folder that is causing the problem. Adobe After Effects 2020/Support Files/(Media Core plug-ins)/Common   If I rename that, AE launches. I tried moving bunches of files out of that folder to try and isolate the problem file, but was unable to pin point it. Only by renaming the Common folder would it launch. Is there an issue in that folder or location of items of that folder?   

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          nealbridgens
          nealbridgens
          Inspiring
          Apr 8, 2020 7:14 PM UTC

          Can you clarify that path, please? I do not have a folder "support files" in my After Effects (applications) folder. Is that in a library somewhere?

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          nealbridgens
          nealbridgens
          Inspiring
          Jan 21, 2020 9:27 PM UTC

          I'm having the same thing. All I get is the splash screen up to "Initializing MediaCore"... then it hangs for a couple minutes. And then just dissapears. No error message, no program running... just goes away.

          I maunually removed all AF prefrences and have only two Apple Quicktime plugins (AppleIntermediateCodec.component & AppleMPEG2Codec.component). 

          All very mysterious.

           

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          HMPHYHMPHY
          Participant
          Feb 6, 2020 10:34 PM UTC

          Did you solve your problem? im having the exact same issue right now tried everything i can do been searching a solution all day yesterday please let me know how you solved

           

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          bwaz
          Participant
          Apr 8, 2020 4:09 AM UTC

          i renamed my (media core plug-ins) and it ran normally. I had AE 2020 and 2019 also installed, after doing this to the same folder in each ap, it ran fine. Don't yet know what is offending the running...one file or multiple in there

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          Vishu_Aggarwal
          Vishu_Aggarwal
          Participating Frequently
          Nov 6, 2019 3:48 PM UTC

          Try resetting the preferences of After Effects CC 2019 as follow - 

          1. Press Command+Option+Shift (Mac OS) while the application is starting > 
          2. A dialog box launches asking you if you want to delete your preferences file. Click OK.
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          Vishu AggarwalAdobe Certified Instructor, Professional and Expert
            Just LemonsAuthor
            Participant
            Nov 6, 2019 5:17 PM UTC

            Thanks for the response,

            I did it, and it continued to hang. Media Encoder works fine - It does take a while to open but after that its smooth.

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