microsoft windows media player 12 codecs

The most recent versions of the codec objects also enable access to some legacy codecs, including Windows Media Video 7 and 8, Windows Media Screen 7, the older Microsoft MPEG-4 codecs, and the Microsoft ISO MPEG-4 codecs. This codec is often used for software training or support by recording monitor images while computer applications are being used. Video codec optimized for encoding sequential screen shots from computer monitors. For content that is mixed music and speech, this codec can dynamically change the encoding algorithm used, to get optimal quality.Ī video codec that supports four categories of encoded content: Simple Profile, Main Profile, Advanced Profile, and Image. This is the preferred codec for streams consisting mostly of spoken words.

CodecĪn audio codec that supports three categories of encoded content: Standard, Professional, and Lossless.Īudio codec optimized for encoding the human voice at high compression ratios. The following table describes the intended uses of the Windows Media codecs. The algorithms used to compress and decompress data for spoken words differ from the algorithms used to compress and decompress music data. The Microsoft WMV video codec in wmv9vcm.dll, wmvdmod.dll in Windows Media Format Runtime 9 and 9.5, and wmvdecod.dll in Windows Media Format Runtime 11 and Windows Media Player 11 and 12 allows remote attackers to execute arbitrary code via a crafted media file, aka 'WMV Video Decoder Remote Code Execution Vulnerability. Not only are there different codecs for audio and for video, but also different codecs for different kinds of content that you might want to put into an audio or video file.

In some cases the COM objects occupy the same dynamically linked library (DLL).Įvery codec object implements two separate but similar interfaces: InterfaceĬompatible with Microsoft Media Foundation. A codec is usually implemented as a pair of COM objects: one for encoding content, and another for decoding content. The term codec is an amalgamation of the terms compressor and decompressor. For a technical overview of the features of the Windows Media codecs, see About the Windows Media Codecs. This documentation is primarily for developers who want to use Windows Media codecs in their C++-based media applications.

Microsoft windows media player 12 codecs