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VFW Video Codec DirectShow Filter

alt tag

This filter allows you to select any VFW video compression codec and use it to build a DirectShow graph.

Background

This filter was written to get around what seems to be a bug in the 64-bit implementation of Microsoft DirectShow.

Usually (in 32-bit apps) when DirectShow enumerates filters it also include legacy audio and video VFW codecs. For some reason in 64-bit apps it fails to enumerate any of the legacy VFW video codecs but it enumerates the audio codecs just fine. When enumeration video compression filters in the category 'CLSID_VideoCompressorCategory' DirectShow creates wrapper filters for all legacy VFW video codecs using the 'AVI Compressor' filter. For legacy audio codecs it does the same thing using 'ACM Wrapper'. In 64-bit mode all legacy video codecs are missing.

Build

  • Compiler: Visual Studio 2008
  • Installer: NSIS