From b6d8b0de92b805f4dbdbcee74cba5c8d8de48f7e Mon Sep 17 00:00:00 2001
From: Moritz Bunkus <moritz@bunkus.org>
Date: Wed, 12 Aug 2015 12:33:32 +0200
Subject: [PATCH] mkvmerge: add option for keeping track statistics tags

---
 ChangeLog                | 7 +++++++
 src/common/hacks.cpp     | 1 +
 src/common/hacks.h       | 3 ++-
 src/input/r_matroska.cpp | 3 ++-
 4 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 27f1d7482..c692e66eb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2015-08-12  Moritz Bunkus  <moritz@bunkus.org>
+
+        * mkvmerge: enhancement: track statistics tags can be kept with
+        the option »--engage keep_track_statistics_tags«. This allows
+        outputting them in verbose identification mode for easier
+        parsing.
+
 2015-08-11  Moritz Bunkus  <moritz@bunkus.org>
 
         * MKVToolNix GUI: new feature: jobs in the queue can now be edited
diff --git a/src/common/hacks.cpp b/src/common/hacks.cpp
index 82d85f82e..e530a413d 100644
--- a/src/common/hacks.cpp
+++ b/src/common/hacks.cpp
@@ -41,6 +41,7 @@ static const struct {
   { ENGAGE_NO_CUE_RELATIVE_POSITION,     "no_cue_relative_position"     },
   { ENGAGE_NO_DELAY_FOR_GARBAGE_IN_AVI,  "no_delay_for_garbage_in_avi"  },
   { ENGAGE_KEEP_LAST_CHAPTER_IN_MPLS,    "keep_last_chapter_in_mpls"    },
+  { ENGAGE_KEEP_TRACK_STATISTICS_TAGS,   "keep_track_statistics_tags"   },
   { 0,                                   nullptr },
 };
 static std::vector<bool> s_engaged_hacks(ENGAGE_MAX_IDX + 1, false);
diff --git a/src/common/hacks.h b/src/common/hacks.h
index 17b1053cb..dbcaeadbf 100644
--- a/src/common/hacks.h
+++ b/src/common/hacks.h
@@ -38,7 +38,8 @@
 #define ENGAGE_NO_CUE_RELATIVE_POSITION     17
 #define ENGAGE_NO_DELAY_FOR_GARBAGE_IN_AVI  18
 #define ENGAGE_KEEP_LAST_CHAPTER_IN_MPLS    19
-#define ENGAGE_MAX_IDX                      19
+#define ENGAGE_KEEP_TRACK_STATISTICS_TAGS   20
+#define ENGAGE_MAX_IDX                      20
 
 void engage_hacks(const std::string &hacks);
 void engage_hack(unsigned int id);
diff --git a/src/input/r_matroska.cpp b/src/input/r_matroska.cpp
index 5ebce1f4f..561e9ff7b 100644
--- a/src/input/r_matroska.cpp
+++ b/src/input/r_matroska.cpp
@@ -1324,7 +1324,8 @@ kax_reader_c::read_headers_internal() {
     for (auto position : m_deferred_l1_positions[dl1t_tags])
       handle_tags(m_in.get(), l0, position);
 
-    discard_track_statistics_tags();
+    if (!hack_engaged(ENGAGE_KEEP_TRACK_STATISTICS_TAGS))
+      discard_track_statistics_tags();
 
     if (!m_ti.m_no_global_tags)
       process_global_tags();