This Item Was Encoded in Format That’s Not Supported. 0Xc00d5212 | Download Missing Codec Windows 10 & 11

How to Fix: This item is was encoded in a format that’s not supported. 0Xc00d5212

Have you failed to play any video due to missing codec with error message saying that “This item was encoded in a format that’s not supported. 0xc00d5212” in Windows 10 or windows 11?

Windows 11, windows 10 and all older versions are missing codec required to play H.265 videos that came in High Efficiency Video Coding (HEVC). So, Movies and TV app as well as Windows Media Player app will fail to play a 8K, 4K or HD video unless you have installed the missed HEVC codec manually.

On this topic, I will show you the best solution to fix Missing Codec 0xc00d5212 when playing HEVC video with this error message: “This item was encoded in a format that’s not supported“.

With this error code: 0xc00d5212

I will show you two different solutions in how to solve missing codec error, so you can try both or one of them, however, its recommended to apply both of suggested solutions. But before showing solutions, you can read the next paragraph to know what is the High Efficiency Video Coding (HEVC) or H.265 codec and its advantages over older codecs.

What is the High Efficiency Video Coding (HEVC)

High Efficiency Video Coding (HEVC) is a new video compression standard designed as part of the MPEG-H project. It also known as H.265 or MPEG-H Part 2, which is twice the compression efficiency of H.264. HEVC codec is the default Apple devices video format, such as iPad, iPhone, and other iOS devices. Compressing Any video using this new codec will result in a smaller size with lossless resolution video. The compressed video can be available in many video formats or containers, such as, AVI, MKV, MOV, MP4 and MPEG.

First solution: Download codec pack for Windows 11, Windows 10 and Windows 8 for free:

  • To fix item encoded in unsupported format, download the mega version of K-Lite Codec Pack from this link.
    • This App is free and includes many audio and video codecs and tools that will fix many codec issues in video players and video editing apps, in addition, this open-source pack contains the popular Media Player Classic app.
  • Once the file gets downloaded, double click it to start the installation process.
  • Select normal installation option and then click on Next button to continue.
  • Now, back to problematic video and play it to see whether the error fixed or not.
  • If the video failed to play with missing codec 0xc00d5212 error or if you want to use the default video player of windows instead of downloading Classic media player, then you have to try the next solution.

Second solution: Download missing codec (HEVC Video addon) from Microsoft store app for free:

If you still unable to play a video File that its Format Not Supported in windows 11 or windows 10 even after downloading and installing K-Lite Codec Pack (as instructed in previous suggestion), you can fix it easily as followings:

Search for HEVC Video in Microsoft store app and purchase the HEVC Video Extensions. Its price is $0.99, however, if you are unable to pay for it, download its older version for free from this link. The older version of this codec was available in Microsoft Store for free with this long name HEVC Video Extensions from Device Manufacturer, but it is not available for free right now.

After downloading the HEVC Microsoft package, double-click the HEVC.Appx file to install the addon or extension into your computer. The version of this package is 1.0.32022.0.


  • The computer should be connected to an active internet during installation, to allow for online verification of the package’s integrity and safety and to download missing codec 0xc00d5212 from Microsoft’s website.
  • This file will download and install missing codec into windows 11 or windows 10 even if you have not logged in to Microsoft Store or linked the Microsoft account to your computer.

Back to the video and try to play it again. In first time you play the video after installing HEVC Video Extensions, you should be connected to the internet, otherwise, you will get an error message saying that:

Can’t play

Make sure you’re connected to the internet, then try again. If you’re definitely connected, make sure no firewalls or proxy servers are blocking access to online services. 0x800704cf.”

Finally, we hope you have got the working solution to fixed missing codec issue and that you can play any video in windows 10 or windows 11 computers without facing “This item was encoded in a format that’s not supported” error anymore. If still need a help, don’t hesitate to add your question in a comment below and we will try our best to help you.

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For more details about suggested solutions, you can watch this video: