I created .gif file with 360 frames from a rotating tower in blender, every frame is 1 degree of rotation. However, there is a bit of curvature on the left and right end of frames. I want to make them all completely rectangular, but I don't feel like editing all 360 frames. 

[![https://imgur.com/a/tWhiH][1]][1]


What would be the best way to modify all the frames at the same time, because the curving on the edges is the same for every frame?

[Folder with all frames][2]


  [1]: https://i.sstatic.net/6YUnM.gif
  [2]: https://drive.google.com/drive/folders/0B53If6VMxlV0c3hpQ3JBMkxtMGc?usp=sharing%22HHA%22