Moviepy: Moviepy AttributeError: 'NoneType' object has no attribute 'shape'

[gsandeep1231]

The input video is a color image. When I print shape of first frame of clip1, it gives proper result. However inside the function clip1.fl_image, it fails at getting the shape for the frame. Not sure how to fix this.

white_output = '/Users/SandeepGangundi/Documents/Courses/Udacity/Self_Driving_Car_ND/Term1/Udacity-CarND-Advanced-Lane-Lines/project_video_output.mp4'
clip1 = VideoFileClip("/Users/SandeepGangundi/Documents/Courses/Udacity/Self_Driving_Car_ND/Term1/Udacity-CarND-Advanced-Lane-Lines/project_video.mp4")
print(clip1.get_frame(0).shape)
white_clip = clip1.fl_image(process_image) #NOTE: this function expects color images!!
%time white_clip.write_videofile(white_output, audio=False)

(720, 1280, 3)
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-8-0f763fa3ae4f> in <module>()  4 white_output = '/Users/SandeepGangundi/Documents/Courses/Udacity/Self_Driving_Car_ND/Term1/Udacity-CarND-Advanced-Lane-Lines/project_video_output.mp4'
  5 clip1 = VideoFileClip("/Users/SandeepGangundi/Documents/Courses/Udacity/Self_Driving_Car_ND/Term1/Udacity-CarND-Advanced-Lane-Lines/project_video.mp4")
 ----> 6
white_clip = clip1.fl_image(process_image) #NOTE: this function expects color images!!
  7 get_ipython().magic('time white_clip.write_videofile(white_output, audio=False)')
 /Users/SandeepGangundi/anaconda/envs/carnd-term1/lib/python3.5/site-packages/moviepy/video/VideoClip.py in fl_image(self, image_func, apply_to)  511 `get_frame(t)` by another frame,

`image_func(get_frame(t))`
  512 """ --> 513 return self.fl(lambda gf, t: image_func(gf(t)), apply_to)
  514 
  515 # --------------------------------------------------------------

 /Users/SandeepGangundi/anaconda/envs/carnd-term1/lib/python3.5/site-packages/moviepy/Clip.py in fl(self, fun, apply_to, keep_duration)  134 
  135 #mf = copy(self.make_frame)

 --> 136
newclip = self.set_make_frame(lambda t: fun(self.get_frame, t))
  137 
  138 if not keep_duration:
 <decorator-gen-178> in set_make_frame(self, mf) /Users/SandeepGangundi/anaconda/envs/carnd-term1/lib/python3.5/site-packages/moviepy/decorators.py in outplace(f, clip, *a, **k)  12 """ Applies f(clip.copy(), *a, **k) and returns clip.copy()"""
  13 newclip = clip.copy()
 ---> 14
f(newclip, *a, **k)
  15 return newclip
  16 
 /Users/SandeepGangundi/anaconda/envs/carnd-term1/lib/python3.5/site-packages/moviepy/video/VideoClip.py in set_make_frame(self, mf)  651 """  652 self.make_frame = mf
 --> 653
self.size = self.get_frame(0).shape[:2][::-1]
  654 
  655 
 AttributeError: 'NoneType' object has no attribute 'shape' 

[Zulko]

My best guess: does your function "process_image" actually return an image (instead of just modifying the image in-place) ?

[gsandeep1231]

Yes it does, below is the function definition:

def process_image(image):
    undistorted_image = undistort_image(image, camera_objpoints, camera_imgpoints)
    binary_thresh_image = color_threshold(undistorted_image)
    binary_warped_image, Minv = transform_perspective(binary_thresh_image)
    left_fit, right_fit = fit_lane_lines(binary_warped_image)
    left_rad, right_rad = get_radius_curvature(binary_warped_image, left_fit, right_fit)
    inv_persp_image = transform_inv_perspective(undistorted_image, binary_warped_image, left_fit, right_fit, Minv)
    dist_off_center_str = get_off_center_distance(binary_warped_image)
    final_image = add_data_to_image(inv_persp_image, dist_off_center_str, left_rad, right_rad)
    return final_image

[gsandeep1231]

I think you are right, my final function inside process_image failed to return proper color image that I expected it to.
Thanks a lot for the quick reply and help.

[earney]

can we close this issue?

[gsandeep1231]

Hi, yes please close this issue.

[mymachinelearnings]

Awesome! This helped