class_docstr: Video output implemented by streaming to FFmpeg with .mp4 output.
class_docstr_tok: ["Video","output","implemented","by","streaming","to","FFmpeg","with",".mp4","output","."]
code: def _handle_error(self):
      _, stderr = self.ffmpeg.communicate()
      bar = "=" * 40
      print("Error writing to FFmpeg:\n{}\n{}\n{}", bar, stderr, bar)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import abc
  import os
  import subprocess
  import time
  import numpy
label_desc: Use image node_id 3 for calling the FFmpegVideoOutput obj's underlying member method code with example usage: obj._handle_error() without return types