This tool takes list of video file names as input and calculates freezing metrics score for the video files without having reference to original video by comparing the PSNR and SSIM values of current and previous frame.
BUG=webrtc:6759
Review-Url: https://codereview.webrtc.org/2515253004
Cr-Commit-Position: refs/heads/master@{#15386}
