diff --git a/media/libstagefright/wifi-display/source/PlaybackSession.cpp b/media/libstagefright/wifi-display/source/PlaybackSession.cpp
index 96c9222..6b42431 100644
--- a/media/libstagefright/wifi-display/source/PlaybackSession.cpp
+++ b/media/libstagefright/wifi-display/source/PlaybackSession.cpp
@@ -132,8 +132,16 @@
       mNumSRsSent(0),
       mSendSRPending(false),
       mFirstPacketTimeUs(-1ll),
-      mHistoryLength(0) {
+      mHistoryLength(0)
+#if LOG_TRANSPORT_STREAM
+      ,mLogFile(NULL)
+#endif
+{
     mTSQueue->setRange(0, 12);
+
+#if LOG_TRANSPORT_STREAM
+    mLogFile = fopen("/system/etc/log.ts", "wb");
+#endif
 }
 
 status_t WifiDisplaySource::PlaybackSession::init(
@@ -215,6 +223,13 @@
 }
 
 WifiDisplaySource::PlaybackSession::~PlaybackSession() {
+#if LOG_TRANSPORT_STREAM
+    if (mLogFile != NULL) {
+        fclose(mLogFile);
+        mLogFile = NULL;
+    }
+#endif
+
     mTracks.clear();
 
     if (mCodecLooper != NULL) {
@@ -470,6 +485,12 @@
                                 true /* timeDiscontinuity */,
                                 lastTSPacket /* flush */);
                     }
+
+#if LOG_TRANSPORT_STREAM
+                    if (mLogFile != NULL) {
+                        fwrite(packets->data(), 1, packets->size(), mLogFile);
+                    }
+#endif
                 }
             } else if (what == Converter::kWhatEOS) {
                 CHECK_EQ(what, Converter::kWhatEOS);
diff --git a/media/libstagefright/wifi-display/source/PlaybackSession.h b/media/libstagefright/wifi-display/source/PlaybackSession.h
index d256fc4..a6c9f27 100644
--- a/media/libstagefright/wifi-display/source/PlaybackSession.h
+++ b/media/libstagefright/wifi-display/source/PlaybackSession.h
@@ -26,6 +26,8 @@
 struct Serializer;
 struct TSPacketizer;
 
+#define LOG_TRANSPORT_STREAM    0
+
 // Encapsulates the state of an RTP/RTCP session in the context of wifi
 // display.
 struct WifiDisplaySource::PlaybackSession : public AHandler {
@@ -111,6 +113,10 @@
     List<sp<ABuffer> > mHistory;
     size_t mHistoryLength;
 
+#if LOG_TRANSPORT_STREAM
+    FILE *mLogFile;
+#endif
+
     void onSendSR();
     void addSR(const sp<ABuffer> &buffer);
     void addSDES(const sp<ABuffer> &buffer);