diff --git a/src/Rtp/Decoder.cpp b/src/Rtp/Decoder.cpp
index 54d213dd..61cbdd7c 100644
--- a/src/Rtp/Decoder.cpp
+++ b/src/Rtp/Decoder.cpp
@@ -91,9 +91,11 @@ void DecoderImp::onStream(int stream, int codecid, const void *extra, size_t byt
     // G711传统只支持 8000/1/16的规格，FFmpeg貌似做了扩展，但是这里不管它了  [AUTO-TRANSLATED:851813f7]
     // G711 traditionally only supports the 8000/1/16 specification. FFmpeg seems to have extended it, but we'll ignore that here.
     auto codec = getCodecByMpegId(codecid);
-    auto track= Factory::getTrackByCodecId(codec);
-    if (track) {
-        onTrack(stream, std::move(track));
+    if (codec != CodecInvalid) {
+        auto track = Factory::getTrackByCodecId(codec);
+        if (track) {
+            onTrack(stream, std::move(track));
+        }
     }
     // 防止未获取视频track提前complete导致忽略后续视频的问题，用于兼容一些不太规范的ps流  [AUTO-TRANSLATED:d6b349b5]
     // Prevent the problem of ignoring subsequent video due to premature completion of the video track before it is obtained. This is used to be compatible with some non-standard PS streams.