From 52e0186fc3edd55ab0bf441046b35bd4044ca38f Mon Sep 17 00:00:00 2001
From: Moritz Bunkus <moritz@bunkus.org>
Date: Sat, 15 Nov 2003 18:19:26 +0000
Subject: [PATCH] Added %N for the cue-to-chapter-name conversion routine
 (track number padded with a zero).

---
 doc/mkvmerge.1          | 7 +++++--
 src/common/chapters.cpp | 6 +++++-
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/doc/mkvmerge.1 b/doc/mkvmerge.1
index 0f042d13f..91b665bb4 100644
--- a/doc/mkvmerge.1
+++ b/doc/mkvmerge.1
@@ -66,9 +66,12 @@ for this name can be set. The following meta characters are supported:
 .br
 \fB%p\fR is replaced by the current entry's \fIPERFORMER\fR string,
 .br
-\fB%t\fR is replaced by the current entry's \fITITLE\fR string and
+\fB%t\fR is replaced by the current entry's \fITITLE\fR string,
 .br
-\fB%n\fR is replaced by the current track number.
+\fB%n\fR is replaced by the current track number and
+.br
+\fB%N\fR is replaced by the current track number padded with a leading zero if
+it is < 10.
 .br
 Everything else is copied as-is.
 .br
diff --git a/src/common/chapters.cpp b/src/common/chapters.cpp
index c402930d3..1da3f9c27 100644
--- a/src/common/chapters.cpp
+++ b/src/common/chapters.cpp
@@ -283,7 +283,11 @@ static void cue_entries_to_chapter_name(string &performer, string &title,
         name += title;
       else if (*next_char == 'n')
         name += to_string(num);
-      else {
+      else if (*next_char == 'N') {
+        if (num < 10)
+          name += '0';
+        name += to_string(num);
+      } else {
         name += *this_char;
         this_char--;
       }