diff --git a/packager/media/formats/mp2t/mp2t_media_parser.cc b/packager/media/formats/mp2t/mp2t_media_parser.cc
index e672320340..3e9ce4fbd3 100644
--- a/packager/media/formats/mp2t/mp2t_media_parser.cc
+++ b/packager/media/formats/mp2t/mp2t_media_parser.cc
@@ -318,6 +318,8 @@ void Mp2tMediaParser::RegisterPes(int pmt_pid,
             sbr_in_mimetype_));
     is_audio = true;
   } else {
+    LOG(WARNING) << "Ignore unsupported stream type 0x" << std::hex
+                 << stream_type << std::dec;
     return;
   }