title: How can I merge multiple tfrecords file into one file?
body: <p>My question is, if I want to create one tfrecords file for my data , it will take approximately 15 days to finish it, it has 500000 pairs of template , and each template is 32 frames( images). In order to save the time,  I have 3 GPUs, so I thought I can create three tfrocords file each one file on one GPUs and then I can finish creating the tfrecords in 5 days. But then I searched about a way to merge these three files in one file and couldn't find proper solution. </p>
  
  <p>So Is there any way to merge these three files in one file, OR is there any way that I can train my network by feeding batch of example extracted form the three tfrecords files, knowing I am using Dataset API.</p>