Certain file formats may not require any decoder filter (RAW formats like PCM Audio), for these file formats you
can use the "Null Filter" (listed on the standard filter list).
You will notice that each of the editors contains a Profile section. These profiles are used to save the
filter lists. I have created profiles for all the major file types I've encountered (and some of the not so major).
These profiles should save you some time when you want to switch between different Splitters and Decoders quickly, so
make sure you save a profile when introducing a new filter.
When checking the pin properties in GraphEdit, the Sub Type may actually be listed as a name instead of the usual
"{}" bound string. For example, on MPEG1 Video you will get "MPEG1Payload" or "MPEG1Video". GraphEdit is actually
being snotty here, as it is using a translation table. You can actually find these Sub Type strings in the DirectShow SDK,
under "uuids.h" or "ksuuids.h". Hopefully you shouldn't encounter these as I believe I covered most of them in the
standard distribution.
If you have any additional questions regarding this interface, leave a message on the
forum.
