diff --git a/trunk/src/srt/srt_to_rtmp.cpp b/trunk/src/srt/srt_to_rtmp.cpp
index ec2d7d828..0d13c6733 100644
--- a/trunk/src/srt/srt_to_rtmp.cpp
+++ b/trunk/src/srt/srt_to_rtmp.cpp
@@ -624,8 +624,7 @@ void rtmp_client::on_data_callback(SRT_DATA_MSG_PTR data_ptr, unsigned int media
     } else if (media_type == STREAM_TYPE_AUDIO_AAC) {
         on_ts_audio(avs_ptr, dts, pts);
     } else {
-        srs_error("mpegts demux unkown stream type:0x%02x", media_type);
-        assert(0);
+        srs_error("mpegts demux unkown stream type:0x%02x, only support h264+aac", media_type);
     }
     return;
 }