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

Close all programs that are active and click on 'retry'. If the same error keeps appearing, then just click on 'ignore' and let the installation continue.

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 and 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 and filters are supported, but more will be added in the future.

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.

Yes you can. However you need to install them in the correct order, otherwise it won't work.

1. Uninstall QuickTime Alternative (or the K-Lite Mega Codec Pack).
2. Install iTunes. It will also install QuickTime.
3. Go to the Windows control panel (a.k.a. configuration) and click on add/remove programs (a.k.a. software).
4. Uninstall QuickTime
5. Install QuickTime Alternative (or the K-Lite Mega Codec Pack).

A few people have problems with recent versions of QuickTime Alternative. These are based on QuickTime 7. The cause of the crashes is unknown. There a two solutions:

- Install the stand-alone version of QuickTime 7. Download it HERE.
- Install a version of QuickTime Alternative that is based on QuickTime 6.

Don't forget to uninstall QuickTime Alternative before you install anything else.

During the installation of the K-Lite Mega Codec Pack, you can deselect components that you don't want to be installed. Just deselect the QuickTime Alternative components and they won't be installed. This way you can use the K-Lite Mega Codec Pack together with any version of QuickTime Alternative that you want. You can even use it together with the regular QuickTime.

* 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.

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

* 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

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

Options > Filters > Audio Switcher

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

Options > Filters > Transform Filters

http://www.microsoft.com/windows/windowsmedia/player/faq.aspx

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.

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.

ReClock might solve your problem.

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.

BSplayer is a bit buggy when it comes to playing Matroska files. Use Media Player Classic instead.

Symptoms: video is only showing in the top half of the screen, it is shown twice, both up-side-down.

There are several solutions for this problem.

Solutions:
- In Media Player Classic, go to Options > Playback > Output, select Overlay Mixer.
- Use DirectVobSub v2.33 instead of v2.36/v2.37
- Use ffdshow to decode XviD instead of the XviD decoder.
- In XviD decoder configuration, force Output Colorspace to YV12.
- Enable YV12 in ffdshow video decoder configuration: Options > Output.

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.

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

Disable that tweak.

Install the Windows Media codec package from Microsoft:

Windows Media Codecs

If that doesn't help, then also install this package:

Windows Media Format 9 runtimes (Windows XP)
Windows Media Format 9 runtimes (Windows 98/ME/2000)

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.

If one or more of the following filters is installed on your computer, then disable or uninstall them:

- Matrix Mixer
- Morgan Multimedia Stream Switcher
- DC-DSP

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

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

Rename the file from .rm to .rmvb

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.

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

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.

Rename your file to .rmvb

Start > Run > type regedit and press enter

Navigate to:
HKEY_CLASSES_ROOT\*\shellex\ContextMenuHandlers

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

Now navigate to:
HKEY_CLASSES_ROOT\SystemFileAssociations\.avi\shellex\PropertyHandler\
Delete the value (default). It will then appear as an empty value.

Close the registry editor and reboot your computer.

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.

Start > Run > regsvr32 /u shmedia.dll

Start > Run > regsvr32 /u shmedia.dll

Start > Run > regsvr32 /u shmedia.dll

MPC Options > Player > Hide CD-ROMs Menu

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

AAC DirectShow parser (aacparser.ax) 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.

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.

Take a look at the guides section of Doom9.org

Both programs should stop crashing if you also install the ffdshow VFW interface.