class_docstr: Base helper class for writing videos.
class_docstr_tok: ["Base","helper","class","for","writing","videos","."]
docstr: Writes a single video frame.
code: def write(self, frame, encoded_frame=None):
      """Writes a single video frame."""
      raise NotImplementedError
  
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 1 for calling the VideoWriter obj's underlying member method code with example usage: obj.write(frame, encoded_frame) without return types