优化日志提示

src/Rtp/RtpProcess.cpp

@@ -119,7 +119,7 @@ bool RtpProcess::inputFrame(const Frame::Ptr &frame) {
         return _muxer->inputFrame(frame);
     }
     if (_cached_func.size() > kMaxCachedFrame) {
-        WarnL << "cached frame of track(" << frame->getCodecName() << ") is too much, now dropped";
+        WarnL << "cached frame of track(" << frame->getCodecName() << ") is too much, now dropped, please check your on_publish hook url in config.ini file";
         return false;
     }
     auto frame_cached = Frame::getCacheAbleFrame(frame);