Merge pull request #6 from Depaulicious/patch-2

Allow arguments to be manually passed to ffmpeg/run wrappers

ffmpeg/_run.py

@@ -104,7 +104,11 @@ def get_args(node):
 @operator(node_classes={OutputNode, GlobalNode})
 def run(node, cmd='ffmpeg'):
     """Run ffmpeg on node graph."""
-    args = [cmd] + node.get_args()
+    if isinstance(cmd, basestring):
+        args = [cmd]
+    elif type(cmd) != list:
+        args = list(cmd)
+    args += node.get_args()
     _subprocess.check_call(args)