Moviepy: headblur.py: ImportError to_fxfy

[jjoe64]

First, thanks for the great project!

I use the current codebase from github. when I want to start the headblur.py example, it throws an Input Error:

$ python headblur.py

Traceback (most recent call last):
  File "headblur.py", line 4, in <module>
    from moviepy.video.tools.tracking import manual_tracking, to_fxfy
ImportError: cannot import name to_fxfy

Please help

[bwagner]

Same here.

BTW: Searching the repository for to_fxfy only brings up the example code that uses it, but no definition of the function. I guess the example worked for previous versions of moviepy?

https://github.com/Zulko/moviepy/search?utf8=✓&q=to_fxfy

[guhur]

The documentation from manual_tracking explains how the manual tracking should be done and reloaded:

    from moviepy.editor import VideoFileClip
    from moviepy.video.tools.tracking import manual_tracking
    clip = VideoFileClip("myvideo.mp4")
    # manually indicate 3 trajectories, save them to a file
    trajectories = manual_tracking(clip, t1=5, t2=7, fps=5,
                                       nobjects=3, savefile="track.txt")
    # ...
    # LATER, IN ANOTHER SCRIPT, RECOVER THESE TRAJECTORIES
    from moviepy.video.tools.tracking import Trajectory
    traj1, traj2, traj3 = Trajectory.load_list('track.txt')
    # If ever you only have one object being tracked, recover it with
    traj, =  Trajectory.load_list('track.txt')

So the documentation needs to be updated, but there is no real bug.