删除一些不必要的代码，添加一些注释

chenshijun

2019-04-22 d5ae54ceb9770963fbe88aa0170c08d0ae648b05

 QiaoJiaSystem/GB28181DecoderModel/VideoCaptureElementWithRtp.cpp

@@ -67,7 +67,6 @@
                            p_this->videoPublishElement->start();
                        } else {
                            if (!p_this->m_image.empty()) {
//                                DBG("videoPublishElement->setImage() : " << p_this->m_chanPubID);
                                p_this->videoPublishElement->setImage(p_this->m_image);
                                p_this->videoPublishElement->submit();
                            } else {