diff --git a/src/Player/PlayerBase.cpp b/src/Player/PlayerBase.cpp
index aa2a8720..9fb6843d 100644
--- a/src/Player/PlayerBase.cpp
+++ b/src/Player/PlayerBase.cpp
@@ -56,10 +56,9 @@ PlayerBase::Ptr PlayerBase::createPlayer(const EventPoller::Ptr &poller, const s
         } else if (end_with(url, ".ts") || end_with(url_in, ".ts")) {
             return PlayerBase::Ptr(new TsPlayerImp(poller), releasePlayer);
         }
-        return PlayerBase::Ptr(new TsPlayerImp(poller), releasePlayer);
     }
 
-    return PlayerBase::Ptr(new RtspPlayerImp(poller), releasePlayer);
+    throw std::invalid_argument("not supported play schema:" + url_in);
 }
 
 PlayerBase::PlayerBase() {
diff --git a/src/Pusher/PusherBase.cpp b/src/Pusher/PusherBase.cpp
index 6d195117..fa0d68e8 100644
--- a/src/Pusher/PusherBase.cpp
+++ b/src/Pusher/PusherBase.cpp
@@ -19,14 +19,14 @@ namespace mediakit {
 
 PusherBase::Ptr PusherBase::createPusher(const EventPoller::Ptr &poller,
                                          const MediaSource::Ptr &src,
-                                         const std::string & strUrl) {
+                                         const std::string & url) {
     static auto releasePusher = [](PusherBase *ptr){
         onceToken token(nullptr,[&](){
             delete  ptr;
         });
         ptr->teardown();
     };
-    std::string prefix = FindField(strUrl.data(), NULL, "://");
+    std::string prefix = FindField(url.data(), NULL, "://");
 
     if (strcasecmp("rtsps",prefix.data()) == 0) {
         return PusherBase::Ptr(new TcpClientWithSSL<RtspPusherImp>(poller, std::dynamic_pointer_cast<RtspMediaSource>(src)), releasePusher);
@@ -44,7 +44,7 @@ PusherBase::Ptr PusherBase::createPusher(const EventPoller::Ptr &poller,
         return PusherBase::Ptr(new RtmpPusherImp(poller, std::dynamic_pointer_cast<RtmpMediaSource>(src)), releasePusher);
     }
 
-    return PusherBase::Ptr(new RtspPusherImp(poller, std::dynamic_pointer_cast<RtspMediaSource>(src)), releasePusher);
+    throw std::invalid_argument("not supported push schema:" + url);
 }
 
 PusherBase::PusherBase() {