VSFilter is a DirectShow filter that is able to rip subtitles from VOB files into a separate format. It can also render several different subtitle formats onto video, either during playback or encoding. It is part of the guliverkli project, and was previously named VobSub.
After development stopped in 2005 with v2.37, in 2007 it became part of the Guliverkli2 project with v2.38.