class_docstr: Wrap VecEnv to record rendered image as mp4 video.
code: def start_video_recorder(self):
      self.close_video_recorder()
  
      base_path = os.path.join(
          self.directory,
          "{}.video.{}.video{:06}".format(
              self.file_prefix, self.file_infix, self.step_id
          ),
      )
      self.video_recorder = video_recorder.VideoRecorder(
          env=self.venv,
          base_path=base_path,
          metadata={"step_id": self.step_id},
      )
  
      self.video_recorder.capture_frame()
      self.recorded_frames = 1
      self.recording = True
  
file_path: baselines/baselines/common/vec_env/vec_video_recorder.py
imports: import os
  from baselines import logger
  from baselines.common.vec_env import VecEnvWrapper
  from gym.wrappers.monitoring import video_recorder
label_desc: Use image node_id 3 for calling the VecVideoRecorder obj's underlying member method code with example usage: obj.start_video_recorder() without return types