Hi Folks,
I received the indoor HD camera from Smarthome and had a chance to investigate. The bottom line is the camera is using an older FOSCAM firmware as the base firmware for the INSTEON model.
Early 2015, FOSCAM released system firmware 1.4.1.9 and in it there were several RTSP errors that were fixed in 1.4.1.10 (confirmed in the 1.4.1.10 release notes from FOSCAM). Unfortunately the INSTEON indoor HD camera is still using 1.4.1.9.
I've captured all the technical details and sent these over to Smarthome for their consideration. Hopefully they'll work with FOSCAM to produce a firmware update to fix the broken RTSP stream present in 1.4.1.9.
Wes