diff --git a/sigal/gallery.py b/sigal/gallery.py
index c0e10c8..2be0f4e 100644
--- a/sigal/gallery.py
+++ b/sigal/gallery.py
@@ -73,7 +73,7 @@ class PathsDb(object):
         # basepath must to be a unicode string so that os.walk will return
         # unicode dirnames and filenames. If basepath is a str, we must
         # convert it to unicode.
-        if isinstance(path, str):
+        if compat.PY2 and isinstance(path, str):
             enc = locale.getpreferredencoding()
             self.basepath = path.decode(enc)
         else:
@@ -105,8 +105,13 @@ class PathsDb(object):
             relpath = os.path.relpath(path, self.basepath)
 
             # sort images and sub-albums by name
-            filenames.sort(cmp=locale.strcoll)
-            dirnames.sort(cmp=locale.strcoll)
+            if compat.PY2:
+                filenames.sort(cmp=locale.strcoll)
+                dirnames.sort(cmp=locale.strcoll)
+            else:
+                from functools import cmp_to_key
+                filenames.sort(key=cmp_to_key(locale.strcoll))
+                dirnames.sort(key=cmp_to_key(locale.strcoll))
 
             self.db['paths_list'].append(relpath)
             self.db[relpath] = {
diff --git a/sigal/image.py b/sigal/image.py
index 3ea069a..86ed09f 100644
--- a/sigal/image.py
+++ b/sigal/image.py
@@ -91,8 +91,7 @@ def generate_image(source, outname, settings, options=None):
 
     outformat = img.format or original_format or 'JPEG'
     logger.debug(u'Save resized image to {0} ({1})'.format(outname, outformat))
-    with open(outname, 'w') as fp:
-        save_image(img, fp, outformat, options=options, autoconvert=True)
+    save_image(img, outname, outformat, options=options, autoconvert=True)
 
 
 def generate_thumbnail(source, outname, box, fit=True, options=None):
@@ -109,8 +108,7 @@ def generate_thumbnail(source, outname, box, fit=True, options=None):
 
     outformat = img.format or original_format or 'JPEG'
     logger.debug(u'Save thumnail image: {0} ({1})'.format(outname, outformat))
-    with open(outname, 'w') as fp:
-        save_image(img, fp, outformat, options=options, autoconvert=True)
+    save_image(img, outname, outformat, options=options, autoconvert=True)
 
 
 def add_copyright(img, text):
diff --git a/sigal/video.py b/sigal/video.py
index 5ef4eb0..c3b2aad 100644
--- a/sigal/video.py
+++ b/sigal/video.py
@@ -27,6 +27,8 @@ import re
 import shutil
 import sigal.image
 
+from . import compat
+
 
 def vid_size(source):
     """Returns the dimensions of the video"""
@@ -35,6 +37,10 @@ def vid_size(source):
                          stdout=subprocess.PIPE,
                          stderr=subprocess.PIPE)
     stdout, stderr = p.communicate()
+
+    if not compat.PY2:
+        stderr = stderr.decode('utf8')
+
     match = pattern.search(stderr)
     if match:
         x, y = int(match.groups()[0]), int(match.groups()[1])