Yeah, the first thing I do with the files is use FFMPEG to slow the play rate from 60fps to 30fps, and also to add a time marker to each frame. For example, here's the command to do that on a 640x120 clip (17424 being the fps):
ffmpeg -i ChronosFile1.mp4 -r 30
-vf "setpts=(2/1)*PTS,
drawtext=fontfile=Arial.ttf: expansion=normal:
text='%{eif\:n*1000/17424\:d}.%{eif\:mod(n*1000/17424*100,100)\:d\:2}ms':
x=(w-tw-5): y=5: fontcolor=white: box=1: boxcolor=0x00000099: fontsize=25"
-an -y ChronosFile1Post.mp4