-                'format_id': '_'.join(['rtmp', rendition['videoContainer'].lower(), rendition['videoCodec'].lower()]),
-                'width': rendition['frameWidth'],
-                'height': rendition['frameHeight'],
-                'tbr': rendition['encodingRate'] / 1024,
-                'filesize': rendition['size'],
+                'format_id': '_'.join(
+                    ['rtmp', rendition['videoContainer'].lower(),
+                     rendition['videoCodec'].lower(), '%sk' % tbr]),
+                'width': int_or_none(rendition['frameWidth']),
+                'height': int_or_none(rendition['frameHeight']),
+                'tbr': tbr,
+                'filesize': int_or_none(rendition['size']),