class_docstr: Base helper class for writing videos.
class_docstr_tok: ["Base","helper","class","for","writing","videos","."]
docstr: Finishes writing frames and returns output, if any.
  
  Frees any resources acquired by the writer.
code: def finish(self):
      """Finishes writing frames and returns output, if any.
  
      Frees any resources acquired by the writer.
      """
      pass
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  from tensor2tensor.layers import common_layers
  from tensor2tensor.utils import contrib
  import tensorflow.compat.v1
  from tensorflow.python.ops import summary_op_util
label_desc: Use image node_id 3 for calling the VideoWriter obj's underlying member method code with example usage: obj.finish() without return types