fix read smpl bug

scripts/postprocess/convert2bvh.py

@@ -152,6 +152,8 @@ def read_smpl(outname):
     assert os.path.exists(outname), outname
     datas = read_json(outname)
     outputs = []
+    if isinstace(datas, dict):
+        datas = datas['annots']
     for data in datas:
         for key in ['Rh', 'Th', 'poses', 'shapes']:
             data[key] = np.array(data[key])
@@ -255,4 +257,4 @@ if __name__ == '__main__':
 
         # Only exit to OS when we are not running in Blender GUI
         if bpy.app.background:
-            sys.exit(exit_status)
+            sys.exit(exit_status)