There was probably an error saying that the compiler couldn't find the file "dmedia/vl_vino.h" in !pix_videoSGI.cpp. IRIX 6.2+ adds new functionality to the media libraries which makes life much easier. You cannot compile pix_video or pix_indycam as is under 5.3. You can remove them from the Pix/Makefile and from the linker part of the global Makefile. You will also need to recompile the Td and Tiff libraries.
There shouldn't be any problems doing this. I haven't tried any of this, so if it works for someone, please let me know.