I am trying to bring up a video call, but not having much luck. We are only
getting one-way video (i.e. the caller sees far-end video, but the callee
does not). I added the H263/H264 tags to the pre-process
"global_codec_prefs" and "outbound_codec_prefs" tags in vars.xml.
Anyone have hints on making two-way video to work?