<html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> </head> <body bgcolor="#FFFFFF" text="#000000"> I see the decklinkvideosink can now accept many new pixel formats including RGBA. Certain Decklink cards support both internal and external keying so is it possible to enable the external keying feature when sending RGBA frames? I cannot see a property to set for this. Regards, Dave. </body> </html>