Q: "An error occurred while trying to replace the existing file: DeleteFile failed; code 5. Access denied."

This means the installer tries to update a file that is currently in use by another program.

Just click on 'ignore' and let the installation continue.

Q: Is it possible to uninstall only a couple components of the K-Lite (Mega) Codec Pack and keep the rest?

No. You'll have to uninstall the whole codec pack. Then install it again with only those components selected that you want.

You can however disable (and re-enable) a few codecs/filters using the Codec Tweak Tool. This will not uninstall the codecs, but it will effectively disable them. At this moment only a few codecs/filters are supported, but more will be added in the future.

Q: I get an error with '' during installation. What is wrong?

Click on 'ignore' and let the installation finish. Everything will work, except for the Matroska Splitter.

You are probably getting this error because there are one or more crucial Windows components missing on your system. Most likely comctl32.dll or DCOM.


Q: I can't play a video file

* If it is an .avi file, open it in GSpot Codec Information Appliance. There you can see which codecs the file needs.

* You can also try to re-install the K-Lite (Mega) Codec Pack. Read the information at the beginning of the installation to see what components you might need. Not all components are enabled by default on the components screen, so you might need to enable some.

Q: When I resize (or full-screen) the Media Player Classic window, the video goes to black while the audio continues

If you have a nVidia GeForce graphics card, then you should update it's drivers.

Q: Subtitles in the Ogg container (.ogm) won't display

* Make sure you are using a player that is capable of displaying subtitles. For example Media Player Classic.

* Make sure DirectVobSub is installed.

* You should enable the option called "enable all streams" in the Ogg splitter.

Start > Programs > K-Lite Codec Pack > Configuration > Codec Tweak Tool

Q: I have installed DC-DSP, but it doesn't seem to work when using Media Player Classic

You need to disable the internal audio switcher of Media Player Classic.

Options > Filters > Audio Switcher

Q: An ActiveMovie window appears when opening a DVD with Media Player Classic

Enable the internal MPEG-2 decoder in Media Player Classic.

Options > Filters > Transform Filters

Q: Video in Windows Media Player isn't played correctly when it is in a playlist

If you find that a video disappears (turns all black) or turns purple and green about 20 seconds before it stops playing, or that video for every file in the playlist isn't displayed, turn off overlays.

To turn off overlays in Windows Media Player 9 Series or later, do the following:

  1. On the Tools menu, click Options , and then click the Performance tab.
  2. Click Advanced .
  3. Clear the Use overlays check box.
If the problem continues, try turning off the video mixing renderer (VMR). You can turn off the VMR by clearing the Use video mixing renderer check box (available in the same location as the Use overlays check box).

Q: I have no sound when playing a QuickTime file

The QuickTime DirectShow filter isn't perfect. As a result some QuickTime files play without sound in all players that are dependant on this filter, like for example Windows Media Player.

Media Player Classic should be able to play the file correctly.

Q: When playing movies with AC3 sound the video often skips

ReClock might solve your problem.

Q: I have a MP4 file that play at more than twice the normal speed

You can solve this problem by installing a different AAC decoder.

K-Lite Codec Pack Full and Mega both have three AAC decoders. CoreAAC, 3ivX AAC and ffdshow. Select either CoreAAC or 3ivx AAC in the installer. Or deselect both and make sure ffdshow is selected. In that case ffdshow will be used for decoding AAC audio.

Windows Media

Q: I can't play WMV files.

Install the following packages from Microsoft:

Windows Media Codecs
Windows Media Codecs
Windows Media Format 9 runtimes

Q: I get some message about acquiring a license when I play certain media files

That means that the file is DRM protected. DRM is a copyright protection method. You generally need to get (read: buy) a license to be able to play the file.

Q: I can't seek when playing a wmv file in Media Player Classic

Media Player Classic Options > Tweaks > Use the WM ASF reader

Disable that tweak and in most cases you should be able to seek again. However seeking might be slower on other files.


Q: I can't repeat (or stop and play again) RealMedia files in Media Player Classic

This is a 'bug' (or limitation) in Media Player Classic.

The only way to replay the file is to re-open the file.

Q: I can't play a .rm file that contains unicode characters in Media Player Classic

Rename the file from .rm to .rmvb

Q: I have problems playing (streaming) RealMedia files in Media Player Classic

Make sure you have installed the K-Lite Mega Codec Pack or Real Alternative.

Make sure you have a recent version of Microsoft DirectX installed.

Q: I can't play streaming RealMedia in Windows Media Player

You must use Media Player Classic to play streaming RealMedia. Other players are not supported.

Q: How do I play RealMedia files in Windows Media Player?

You need to have the K-Lite Mega Codec Pack or Real Alternative installed. The 'RealMedia DirectShow filter' and 'RealMedia codecs' that come with these two packages are required.

Now change the following file types so that they open in Windows Media Player:

.ra .rm .ram .rmvb

See another topic below for how you can change a file association.

Q: I have troubles displaying RealMedia files on my secondary monitor

Rename your file to .rmvb

Windows worries

Q: Some .avi files cause a crash in explorer.exe

Start > Run > type regedit and press enter

Navigate to:

If there is an entry in there with the name DivX in it, delete it.

Now navigate to:
Delete the value (default). It will then appear as an empty value.

Close the registry editor and reboot your computer.

Q: How do I change a file association?

Open the Windows Explorer (hold the Windows Key and press 'E')

In the top menu go to: Tools > Folder Options > File Types

Now select the file type that you want to change and click on 'change'. Select the program that you want to use to open the selected file type and press OK.

If the file type is not yet in the list, then click on 'New' to add it to the list yourself.

Q: How do I disable the thumbnail view of video files in Windows XP?

Start > Run > regsvr32 /u shmedia.dll

Q: Windows Explorer crashes when browsing a folder that contains video files

Start > Run > regsvr32 /u shmedia.dll

Q: Some icons appear in the system tray when I browse a folder that contains video files in Windows Explorer

Start > Run > regsvr32 /u shmedia.dll


Q: Media Player Classic freezes for a while when I open the File menu

MPC Options > Player > Hide CD-ROMs Menu

Q: I have problems with my TV card or webcam after installing the K-Lite (Mega) Codec Pack

Uninstall it and then re-install it, but now deselect the I.263 and Indeo codecs.

AAC DirectShow parser ( can also cause problems. Note that this filter is not included in (recent versions of) the K-Lite Codec Pack. But perhaps you have installed in some other way.


Q: Sherlock falsely reports some codecs as broken

Sherlock assumes that VFW and ACM codecs are always installed in the Windows System32 folder. This is not always the case. As a result Sherlock will report all codecs that are located outside the System32 folder as broken, while they are probably just working fine.

If Sherlock reports a codec as broken and it has an funny looking location like "C:\WINDOWS\system32\C:\PROGRA~1\K-LITE~1\codecs\divx.dll", then it is an incorrect report. The codec is most likely ok, so ignore the error message.


Q: Where can I find some tutorials for encoding?

Take a look at the guides section of