int linphone_call_take_video_snapshot(LinphoneCall *call, const char *file);
LinphoneReason linphone_call_get_reason(const LinphoneCall *call);
const char *linphone_call_get_remote_user_agent(LinphoneCall *call);
+const char *linphone_call_get_remote_contact(LinphoneCall *call);
float linphone_call_get_play_volume(LinphoneCall *call);
float linphone_call_get_record_volume(LinphoneCall *call);
float linphone_call_get_current_quality(LinphoneCall *call);