Windows media player not playing .Mp4 files

Hi Vaisakh,

We're glad that you brought this up. The reason why your Windows media player is not playing the .mp4 file is due to not having the proper codec pack for it. Click here for the codec information. To download the codec for your Windows media codec, click here.

Let us know if you need further assistance.

Regards,

Kem Mon

Hi Kem Mon,

Thanks for your immediate reply.

But the link you have shared is only  for Windows XP/2000.I am using windows 7 and media player version 12. I could not able to install that codec in my system.Please provide me an alternative way to fix this issue.Also can you please let me know is there any way to debug error in windows media player.

Hi Vaisakh,

For the codecs, you can set the automatic updates. For setting it up, click here.

As for other options in resolving it. We can run online repair/Fix it, click here.

We can also clear the Windows Media Player data base. The following steps are:

1. Exit Windows Media player.
2. Click Start, then click Run, type %LOCALAPPDATA%\Microsoft\Media Player, click OK.
3. Select all the files in the folder, then click Delete on the file menu.

Note: You don't have to delete the folders that are in this folder.

4. Restart Windows Media Player.

--OR--

We also can run SFC (System File Checker) to scan your computer. Click here for the link to do SFC.

Let us know if you need further assistance.

Regards,

Kem Mon

Hi Kem Mon,

I have tried all solutions you have mentioned. But I couldn't find it helpful.I can play a set of .mp4 files.But some .mp4 are not able to play.But these files are playable in all other players.

Please find a sample .mp4 file from below link, and can you please verify that this file is working in your system.

https://drive.google.com/file/d/0B\_8N42LxNco2MEFSWkxnVUoxMFU/view?usp=sharing

Search for KLM codec pack on the internet and download and install it. This should resolve the problem.