refine the print info.

@@ -283,7 +283,7 @@ int main(int argc, char** argv)
                     goto rtmp_destroy;
                 }
             } else {
-                srs_human_trace("drop message size=%dB", size);
+                srs_human_trace("drop message type=%d, size=%dB", type, size);
             }
         }
         

@@ -2595,8 +2595,8 @@ int srs_human_print_rtmp_packet(char type, u_int32_t timestamp, char* data, int
     
     u_int32_t pts;
     if (srs_utils_parse_timestamp(timestamp, type, data, size, &pts) != 0) {
-        srs_human_trace("Video packet type=%s, dts=%d, pts=%d, size=%d, DecodeError", 
-            srs_human_flv_tag_type2string(type), timestamp, pts, size
+        srs_human_trace("Rtmp packet type=%s, dts=%d, size=%d, DecodeError", 
+            srs_human_flv_tag_type2string(type), timestamp, size
         );
         return ret;
     }
@@ -2635,7 +2635,7 @@ int srs_human_print_rtmp_packet(char type, u_int32_t timestamp, char* data, int
             srs_freep(amf0_str);
         }
     } else {
-        srs_human_trace("Unknown packet type=%#x, dts=%d, pts=%d, size=%d", 
+        srs_human_trace("Rtmp packet type=%#x, dts=%d, pts=%d, size=%d", 
             type, timestamp, pts, size);
     }