Merge pull request #156 from christianbrodbeck/imageio

[MRG] FIX:  make screenshot() before starting movie

Author: larsoner

surfer/tests/test_viz.py

@@ -37,6 +37,9 @@ def test_offscreen():
     """
     mlab.options.backend = 'auto'
     brain = Brain(*std_args, offscreen=True)
+    # Sometimes the first screenshot is rendered with a different
+    # resolution on OS X
+    brain.screenshot()
     shot = brain.screenshot()
     assert_array_equal(shot.shape, (800, 800, 3))
     brain.close()

surfer/viz.py

@@ -2250,6 +2250,9 @@ def save_movie(self, fname, time_dilation=4., tmin=None, tmax=None,
 
         logger.debug("Save movie for time points/samples\n%s\n%s"
                      % (times, time_idx))
+        # Sometimes the first screenshot is rendered with a different
+        # resolution on OS X
+        self.screenshot()
         images = (self.screenshot() for _ in
                   self._iter_time(time_idx, interpolation))
         imageio.mimwrite(fname, images, **kwargs)