@steve02081504 The trick is simple: CoCreateInstance with the GUIDs of the LAV Filter listed below and AddFilter to the IGraphBuilder in advance.
For other questions, see DirectShow samples.
DEFINE_GUID_STATIC(CLSID_LAVSplitter,
0x171252A0, 0x8820, 0x4AFE, 0x9D, 0xF8, 0x5C, 0x92, 0xB2, 0xD6, 0x6B, 0x04);
DEFINE_GUID_STATIC(CLSID_LAVAudioDecoder,
0xE8E73B6B, 0x4CB3, 0x44A4, 0xBE, 0x99, 0x4F, 0x7B, 0xCB, 0x96, 0xE4, 0x91);
DEFINE_GUID_STATIC(CLSID_LAVVideoDecoder,
0xEE30215D, 0x164F, 0x4A92, 0xA4, 0xEB, 0x9D, 0x4C, 0x13, 0x39, 0x0F, 0x9F);
