MqttMgr::report_response_args(gMqttClient,consts::pub_topic_response+rid,-2,"no video found",cmd,rid,data);
if(res.empty()&&status<0){
MqttMgr::report_response_args(gMqttClient,consts::pub_topic_response+rid,EV_MSG_ERROR_INVALID_PARAM,"no video found: timestamp too far in the past",cmd,rid,data);