Ich zitiere: ffdshow is DirectShow and VFW codec for decoding/encoding many video and audio formats, including DivX and XviD movies using libavcodec, xvid and other opensourced libraries with a rich set of postprocessing filters.
Und: Libavcodec is a part of ffmpeg, a hyper fast realtime audio/video encoder, a streaming server and a generic audio and video file converter.

ffdshow ist, um erneut zu zitieren, eine Sammlung von DirectShow-Filtern und Codecs. q.e.d.