fixes issue matplotlib#2482 and adds note about incompatibility between bbox options and animation backends

Author: vlsd

lib/matplotlib/animation.py

@@ -399,9 +399,9 @@ class FFMpegFileWriter(FileMovieWriter, FFMpegBase):
     def _args(self):
         # Returns the command line parameters for subprocess to use
         # ffmpeg to create a movie using a collection of temp images
-        return [self.bin_path(), '-vframes', str(self._frame_counter),
-                '-r', str(self.fps), '-i',
-                self._base_temp_name()] + self.output_args
+        return [self.bin_path(), '-i', self._base_temp_name()-vframes,
+                '-vframes', str(self._frame_counter),
+                '-r', str(self.fps), ] + self.output_args
 
 
 # Base class of avconv information.  AVConv has identical arguments to
@@ -1002,7 +1002,7 @@ def __init__(self, fig, func, frames=None, init_func=None, fargs=None,
             self._iter_gen = lambda: iter(frames)
             self.save_count = len(frames)
         else:
-            self._iter_gen = lambda: xrange(frames)
+            self._iter_gen = lambda: xrange(frames).__iter__()
             self.save_count = frames
 
         # If we're passed in and using the default, set it to 100.

matplotlibrc.template

@@ -380,6 +380,10 @@ backend      : %(backend)s
 #savefig.edgecolor   : white    # figure edgecolor when saving
 #savefig.format      : png      # png, ps, pdf, svg
 #savefig.bbox        : standard # 'tight' or 'standard'.
+                                # 'tight' is incompatible with pipe-based animation
+                                # backends but will workd with temporary file based ones:
+                                # e.g. setting animation.writer to ffmpeg will not work,
+                                # use ffmpeg_file instead
 #savefig.pad_inches  : 0.1      # Padding to be used when bbox is set to 'tight'
 #savefig.jpeg_quality: 95       # when a jpeg is saved, the default quality parameter.
 #savefig.directory   : ~        # default directory in savefig dialog box,