FIXED: To play this video you need a new codec

Matthew Adams
by Matthew Adams
Windows & Software Expert
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  • Windows Media Player users are frequently bothered by the same error message that states To play this video you need a new codec.
  • To fix it, you may install the required codec or try out a new video player from the start.
  • Whenever you can't play a certain video file format, a video codec pack compatible with the respective format is required. Use this Codec Pack section in that regard.
  • You may find our PC Software Hub handy too, so feel free to take a closer look.

A video codec encodes digital signals so that media players can play videos correctly. Thus, media player error messages pop up when required codecs are missing for some videos that users try to play.

That’s especially the case for Windows Media Player, which doesn’t incorporate much built-in codec support.


The following WMP error messages might pop up when a required codec for video playback is missing:

  • A codec is required to play this file.
  • Windows Media Player cannot play, burn, rip, or sync the file because a required audio codec is not installed on your computer.

Windows Media Player users will need to install a new codec to play specific video formats when either of the above error messages pops up.

That’s pretty much the only fix for either of the above two WMP error messages. Or users can try out some alternative media players instead.

How can I fix To play this video you need a new codec error?

  1. Select the Download codecs automatically option
  2. Play the video with an alternative media player
  3. Install the Required Codec via VideoInspector
  4. Add the K-Lite Codec Pack to Windows

1. Select the Download codecs automatically option

  1. Open the Windows Media Player 11 video player.
  2. Click Now Playing and select More Options.
  3. Then select the Player tab.
    player options you need a new codec
  4. Select the Download codec automatically option on the Player tab.

Windows XP or Vista users who are still utilizing the older Windows Media Player 11 version can select to download codecs automatically.

Then an install codec prompt will appear when users try to play their videos, from which they can select to install the needed codec.

So, selecting the Download codecs automatically option is one resolution more specifically for WMP 11. This is how users can select that setting.

Windows Media Player 12 users can’t select a Download codecs automatically option on the Player tab. However, they can still configure the software to get more regular automatic updates.

Select the Once a day option for the most regular updates.

2. Play the video with an alternative media player

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3. Add the K-Lite Codec Pack to Windows

The A codec is required to play this file error will more likely arise for users who have not installed the K-Lites Code Pack.

K-Lite includes all the most common media codecs, which will ensure that WMP can play most of the more standard video file formats.

Therefore, installing K-Lite will probably resolve most WMP codec error messages. Click Download on the K-Lite Mega Codec Pack page to save the setup wizard for K-Lite.

Then users can open the setup wizard for K-Lite from the folder they saved it to. Click Next and then select Simple mode to install K-Lite with the recommended defaults.

Thereafter, users can keep on clicking Next until they get to the Install option. Click Install to finish.

4. Install the Required Codec via VideoInspector

  1. Click Download on the VideoInspector page to get the installer for that software.
  2. Open the setup wizard for VideoInspector to add that software to Windows.
  3. Then open the VideoInspector window shown directly below.videoinspector To play this video, you need a new codec
  4. Click the Browse button to select the video that returns the A codec is required to play this file error message.
  5. The Codec box on that window will include a cross to highlight that a required codec is missing for the selected videos. Users can then click the Download link in that box to install the required codec.

However, if codec error messages still pop up even with K-Lite installed, users need to find a codec that enables playback for some more obscure video file formats.

For that, the VideoInspector software might come in handy. VideoInspector is freeware software the provides detailed info for videos.

That software will tell users if the required codec for a video is installed and provide download links for codecs. Are things any better now?

Do note that these solutions may be applied when dealing with any of these issues:

  • Missing codec – If you’re experiencing this issue, note that this message pops up when required codecs are missing for some videos that you try to play.
  • Install additional codecs to work with this file – Users often complain about receiving this error message out of the blue. Windows Media Player cannot play certain files because the required video codec is not installed, so consider trying out an alternative media player.
  • Missing codec 0xc00d36b4 – Getting this message when trying to play videos is nothing out of the ordinary. Try out the above solutions with no hesitation.

FAQ: Learn more about missing codecs

  • What does missing codec mean?

This issue usually appears if a codec that is required to play certain files is not installed on the PC.

  • How do I fix missing codecs?

You may select the Download codecs automatically option or use other tips from this guide on how to fix missing codecs issues.

  • What happens if video codec is not supported?

If video codec is not supported, Windows Media Player can’t play specific video formats and video downloads would take much longer.

Editor’s Note: This post was originally published in April 2019 and has been since revamped and updated in July 2020 for freshness, accuracy, and comprehensiveness.

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