Welchen Wert hat denn HR?
VFW_S_NOPREVIEWPIN - 0x0004027E
VFW_E_NOT_IN_GRAPH - 0x8004025F
E_FAIL Unspecified failure - 0x80004005
E_INVALIDARG - One or more arguments are not valid - 0x80070057
E_POINTER - Pointer that is not valid - 0x80004003
https://learn.microsoft.com/en-us/wi...2-renderstream