I enabled tv output on my gumstix during boot (added omapfb.mode=tv:ntsc omapfb.debug=y omapdss.def_disp=tv omapfb.tvcable=svideo to mmcargs) and now have a clean ntsc signal, although it a black screen (note, this is a console build).
Can I use gstreamer to output a videotestsrc to the tv? What 'sink' type would it be? I tried a few ones that I thought should work, but no luck. Could my 'console' build be missing the pipe I need?