we are currently working with live video feed (S-Video, in this case) on a HD1010 with that USB-Live-Input extension.
The application has the disadvantage that you see the (camera-ed) live setting and the resulting (displayed) picture at the same time ... only about 4 seconds later.
I remember having talked about that delay to somebody at the ROKU booth on ISE 2(?) years ago, when i first saw the "live" picture there, and i remember he said something about a possibility to optimize that ...
But i don't remember if that was a setting, or just the entry in the developers' to-do list

Is there anything i can do to prevent the HD1010 from chewing on that video for such a long time?
Change picture size?
Change zone size?
Change some lines of the BRS file?
Use specialized firmware?
Use a "manual" script rather than a BA result?