In order to work with various codec vendors, I understand that standard
guids for video formats are often derived from FOURCC code, such as H263,
H264 as shown here
and guid can be derived from it like this
GUID g2 = (GUID)FOURCCMap(FCC('H263'
0x33363248, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71
But what about audio type guids? how is it derived?
How does one vendor decide what audio guid to use so it can work with other