K-Lite Codec Tweak Tool is a free comprehensive toolkit that offers you a large selection of utilities designed to help you manage all the audio and video codecs installed on your system. Among other tasks, you can enable and disable many DirectShow filters, DirectX Media Objects, ACM/VFW codecs, or back up and restore your codec settings.
This is a true Swiss Army knife for anyone using the filters and codecs included in the K-Lite Codec Pack. However, note that some of the functionality available may require some extra knowledge about multimedia codecs on your part, especially the sections dealing with video encoders/decoders configuration. Therefore, it is advisable that you back up your codec settings before actually changing anything.
Other interesting utilities are much easier to deal with, though. Thus, you can tell the program to fix any broken codec-related entries in your Windows registry, or to reset your codecs’ and DirectShow filters’ settings to their recommended values. You can also decide which codec or splitter you would like to handle a specific container among those in your system performing the same function. You can also update your system’s codecs by enabling new ones or disabling those you will not be using in the future.
All in all, K-Lite Codec Tweak Tool is a full-featured codec manager anyone interested in multimedia tools should check.