From 9cc367ae24ee341e507fbd1cf815de527d54195a Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 19 Jul 2011 08:09:11 -0600
Subject: [PATCH] MOBI Input: When extracting images, ignore records that are
 known as non images faster

---
 src/calibre/ebooks/mobi/reader.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/calibre/ebooks/mobi/reader.py b/src/calibre/ebooks/mobi/reader.py
index 1173b84266..d704379cf1 100644
--- a/src/calibre/ebooks/mobi/reader.py
+++ b/src/calibre/ebooks/mobi/reader.py
@@ -933,6 +933,9 @@ class MobiReader(object):
                 continue
             processed_records.append(i)
             data  = self.sections[i][0]
+            if data[:4] in (b'FLIS', b'FCIS', b'SRCS', b'\xe9\x8e\r\n'):
+                # A FLIS, FCIS, SRCS or EOF record, ignore
+                continue
             buf = cStringIO.StringIO(data)
             image_index += 1
             try: