From 10888c4525290e6687f4949d1110f20a7849f8ae Mon Sep 17 00:00:00 2001
From: Michael Alyn Miller <malyn@strangeGizmo.com>
Date: Mon, 20 Apr 2015 19:57:56 -0700
Subject: [PATCH] Rename the page to *.ppm before calling unpaper

unpaper (or more correctly, libav) appears to need the .ppm file
extension in order to realize that it is being given a PPM file.
---
 scanpdf/scanpdf.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/scanpdf/scanpdf.py b/scanpdf/scanpdf.py
index b211987..251830e 100644
--- a/scanpdf/scanpdf.py
+++ b/scanpdf/scanpdf.py
@@ -155,10 +155,12 @@ def run_postprocess(self, page_files):
         
         processed_pages = []
         for page in page_files:
+            ppm_page = '%s.ppm' % page
+            os.rename(page, ppm_page)
             processed_page = '%s_unpaper' % page
-            c = ['unpaper', page, processed_page]
+            c = ['unpaper', ppm_page, processed_page]
             self.cmd(c) 
-            os.remove(page)
+            os.remove(ppm_page)
             processed_pages.append(processed_page)
         os.chdir(cwd)
         return processed_pages