QuickTime Codecs: required for playing QuickTime content.Media Player Classic is also capable of playing QuickTime and RealMedia content if those codecs are installed. It also has internal support for opening Matroska and Ogg containers. Media Player Classic: this is a full-featured player which has internal decoding support for DVD, MPEG-2, MP3, MP2, AAC, AC3 and DTS.That contains all the DirectShow filters that are required to play QuickTime files. If you want to play QuickTime files in Windows Media Player or another DirectShow based player, then it is recommended to install the K-Lite Codec Pack. Other players require DirectShow filters to be able to play QuickTime files.

Media Player Classic and ZoomPlayer are capable of playing QuickTime files by using the QuickTime framework that gets installed by QuickTime Alternative. QuickTime Alternative is a trimmed down version of QuickTime that contains only the essential components needed for playing QuickTime content that is embedded in webpages.