diff --git a/app/muxer_flags.h b/app/muxer_flags.h
index b002bc2578..eefb6db551 100644
--- a/app/muxer_flags.h
+++ b/app/muxer_flags.h
@@ -67,4 +67,18 @@ DEFINE_string(temp_file,
               "not specified, a new file will be created in an OS-dependent "
               "temporary directory.");
 
+// Flags for MuxerListener.
+DEFINE_bool(output_media_info,
+            true,
+            "Create a human readable format of MediaInfo. The output file name "
+            "will be the name specified by output flag, suffixed with "
+            "'.media_info'.");
+DEFINE_string(scheme_id_uri,
+              "",
+              "This flag only applies if output_media_info is true. This value "
+              "will be set in MediaInfo if the stream is encrypted. "
+              "Use scheme_id_uri when you generate an MPD. If the "
+              "stream is encrypted, MPD requires a <ContentProtection> "
+              "element which requires the schemeIdUri attribute.");
+
 #endif  // APP_MUXER_FLAGS_H_
diff --git a/app/packager_main.cc b/app/packager_main.cc
index 8083d19059..09c3c328b6 100644
--- a/app/packager_main.cc
+++ b/app/packager_main.cc
@@ -18,7 +18,9 @@
 #include "media/base/muxer_options.h"
 #include "media/base/request_signer.h"
 #include "media/base/stream_info.h"
+#include "media/event/vod_media_info_dump_muxer_listener.h"
 #include "media/file/file.h"
+#include "media/file/file_closer.h"
 #include "media/mp4/mp4_muxer.h"
 
 DEFINE_bool(dump_stream_info, false, "Dump demuxed stream info.");
@@ -171,6 +173,24 @@ bool RunPackager(const std::string& input) {
     return false;
 
   scoped_ptr<Muxer> muxer(new mp4::MP4Muxer(muxer_options));
+  scoped_ptr<event::MuxerListener> muxer_listener;
+  scoped_ptr<File, FileCloser> mpd_file;
+  if (FLAGS_output_media_info) {
+    std::string output_mpd_file_name = FLAGS_output + ".media_info";
+    mpd_file.reset(File::Open(output_mpd_file_name.c_str(), "w"));
+    if (!mpd_file) {
+      LOG(ERROR) << "Failed to open " << output_mpd_file_name;
+      return false;
+    }
+
+    scoped_ptr<event::VodMediaInfoDumpMuxerListener> media_info_muxer_listener(
+        new event::VodMediaInfoDumpMuxerListener(mpd_file.get()));
+    media_info_muxer_listener->SetContentProtectionSchemeIdUri(
+        FLAGS_scheme_id_uri);
+    muxer_listener = media_info_muxer_listener.Pass();
+    muxer->SetMuxerListener(muxer_listener.get());
+  }
+
   if (!AddStreamToMuxer(demuxer.streams(), muxer.get()))
     return false;
 
diff --git a/media/event/muxer_listener.h b/media/event/muxer_listener.h
index d24b811a96..9220b1bb77 100644
--- a/media/event/muxer_listener.h
+++ b/media/event/muxer_listener.h
@@ -24,6 +24,8 @@ class MuxerListener {
     kContainerWebM
   };
 
+  virtual ~MuxerListener() {};
+
   // Called when muxing starts. This event happens before any other events.
   // For MPEG DASH Live profile, the initialization segment information is
   // available from StreamInfo.
@@ -64,7 +66,6 @@ class MuxerListener {
                             uint64 segment_file_size) = 0;
  protected:
   MuxerListener() {};
-  virtual ~MuxerListener() {};
 };
 
 }  // namespace event
diff --git a/packager.gyp b/packager.gyp
index 53af15b001..9956781ad4 100644
--- a/packager.gyp
+++ b/packager.gyp
@@ -297,6 +297,7 @@
       ],
       'dependencies': [
         'file',
+        'media_event',
         'mp4',
         'third_party/gflags/gflags.gyp:gflags',
       ],