How do I change the default decoder for WMP12 in Win7?

In Windows 7 systems, the version of the Windows Media Player Media Player that is brought in is 12,windows Media Player abbreviation WMP,WMP mainly for common media formats, such as WMV, MP3, WAV, AVI and other media files, At the same time it also takes into account the heavy responsibility of streaming media playback, many video live use is WMP to watch.

In all versions of the Windows system, WMP 12 is the most powerful, effective way to manage your music, videos, pictures, and recorded TV shows, and with Windows7 's media library, it's very convenient to share data across the home network. and WMP12 support high-definition video playback, compared to the previous WMP support video format is much more. Of course, compared with other professional players, there is a certain gap.

However, in the Windows 7 RC version of the Windows Media Player Media Player, when playing MKV format HD video has a lot of problems, playback is not smooth, subtitles can not load, can not be reversed. Microsoft says the problem is most likely due to poor compatibility with the decoder and Windows 7, and recommends that he replace the decoder and try again. Then this problem is mainly in the Windows 7 RC with the decoder, the problem is found, the solution is also simple-with other decoders to replace the band can be. But it's easier said than done, and the operation needs to be done by modifying the registry.

Note: The following actions only apply to WMP 12 when a Third-party decoder is played when playing local video files; there is a risk of modifying Registry Editor, please note the backup.

1. Start Registry Editor and navigate to:

Hkey_local_machinesoftwaremicrosoftdirectshowpreferred

2. Right-click "Preferred" and select "Permissions (Permissions)"

3. Click "Advanced (Advanced)" At the bottom right of the window, then go to the "Owner" tab, select "Administrators" in the "Change owner to" box, and check the "Replace the child container and owner of the object" (replace owner on Subcontainers and Objects) ", click" OK "to make the operation effective.

4. Return to the "Permissions" window, in the above "Security" box, select "Administrators", and then in the "Administrators" below the "permission" to check the full control. This allows you to modify the registry's preferred entry.

5. Then find these two items in the Content box on the right:

{E06d8026-db46-11cf-b4d1-00805f6cbbea}

{31435641-0000-0010-8000-00aa00389b71}

Double-click them, pop the Edit String dialog box, and fill in the data value with the decoder CLSID (class identifier) you want to use.

The following are the CLSID of some common decoders:

Ffdshow-{04FE9017-F873-410E-871E-AB91661A4EF7}

Mpcvideodecoder-{008BAC12-FBAF-497B-9670-BC6F6FBAE2C4}

COREAVC-{09571A4B-F1FE-4C60-9760-DE6D310C7C31}

Restart the computer when you are done.