From 2791ecc167b5f5ba94b7a56cf155f2217d2f8309 Mon Sep 17 00:00:00 2001
From: slush <info@bitcoin.cz>
Date: Fri, 3 Aug 2012 16:05:47 +0200
Subject: [PATCH] Added check if video device is available

---
 lib/qrscanner.py |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/lib/qrscanner.py b/lib/qrscanner.py
index eb3571a..bbf11c5 100644
--- a/lib/qrscanner.py
+++ b/lib/qrscanner.py
@@ -11,6 +11,14 @@ from urlparse import urlparse, parse_qs
 def is_available():
     if not zbar:
         return False
+
+    try:
+        proc = zbar.Processor()
+        proc.init()
+    except zbar.SystemError:
+        # Cannot open video device
+        return False
+
     return True
 
 def scan_qr():
-- 
1.7.1