catch OSError and skip task tests

lib/video/ffmpeg.py

@@ -136,5 +136,5 @@ class Video(object):
             # If in the future we want to check for an ffmpeg version
             # this is the place to do it.
             return bool(version_re.match(output))
-        except subprocess.CalledProcessError:
+        except (OSError, subprocess.CalledProcessError):
             pass

lib/video/tasks.py

@@ -20,6 +20,10 @@ def resize_video(src, instance, *kw):
     """
     log.info('[1@None] Encoding video %s' % instance.pk)
     video = Video(src)
+    if not video.encoder_available():
+        log.info('Video encoder not available for %s' % instance.pk)
+        return
+
     video.get_meta()
     if not video.is_valid():
         log.info('Video is not valid for %s' % instance.pk)

lib/video/tests.py

@@ -87,6 +87,8 @@ class TestTask(amo.tests.TestCase):
         self.mock.thumbnail_path = tempfile.mkstemp()[1]
         self.mock.image_path = tempfile.mkstemp()[1]
         self.mock.pk = 1
+        if not ffmpeg.Video('').encoder_available():
+            raise SkipTest
 
     def test_resize_video(self):
         resize_video(files['good'], self.mock)