If PJSUA is built with video support, but all video codecs are disabled (e.g. priority set to 0), making a call will fail due to assertion (sdp_neg.c:111: pjmedia_sdp_neg_create_w_local_offer: Assertion `(status=pjmedia_sdp_validate(local))==PJ_SUCCESS' failed.). The reason seems to be that pjmedia_sdp_neg_create_w_local_offer() expects at least one codec for each media line, but if video codecs are disabled there are will be a media line for video but without any codec. The problem is that in pjsua_media_channel_init() the codec priorities (e.g. is there any active video codec registered?) are not taken into account, only pjsua_call_setting is checked for call->opt.vid_cnt to decide whether to add media line for video. So is it really up to the user to also set vid_cnt in pjsua_call_setting to 0 if codec priority of video codec has been set to 0 in codec manager?
