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gen_rand_clip.py
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gen_rand_clip.py
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from moviepy101.moviepy.editor import concatenate_videoclips, VideoFileClip
import numpy as np
# writes a file to the file path with the given text
def write_file(file_path, text):
f = open(file_path, "a+")
f.write(text)
f.close()
# NOTE THE FINAL BLINK IS AT 13s
def gen_clip(vid_path, name, max_time=7, min_time=3, video_length=20):
'''
Author: Tony Xu
Generates a video clip for the Flanker test
DELETES file if similar path exists!!
:param vid_path: path to save video and log of video
:param max_time: the maximum length of the flashing clips
:param min_time: the minimum length of the flashing clips
:param video_length: the number of flashing highlighted clips
:return: none
'''
c1 = VideoFileClip('./leftarm.mp4').subclip(t_start=0, t_end=max_time)
c2 = VideoFileClip('./leftleg.mp4').subclip(t_start=0, t_end=max_time)
c3 = VideoFileClip('./rightarm.mp4').subclip(t_start=0, t_end=max_time)
c4 = VideoFileClip('./rightleg.mp4').subclip(t_start=0, t_end=max_time)
null = VideoFileClip('./alloff.mp4').subclip(t_start=0, t_end=max_time)
init = VideoFileClip('./init_clip.mp4').subclip(t_start=0, t_end=15)
clips = [c1, c2, c3, c4]
clip_log = []
cliplist = [init]
# the length of the initial clip is 15 seconds
time_in_video = 15
for i in range(video_length):
# generate a random clip length for the NULL clip and append it, also increase the time in the video
null_length = np.random.randint(low=min_time, high=max_time+1)
cliplist.append(null.subclip(t_start=0, t_end=null_length))
time_in_video += null_length
# generate a random clip number
rand_clip_num = np.random.randint(low=0, high=4)
r_clip = clips[rand_clip_num]
# generate a random clip length for the HIGHLIGHTED clip
hl_length = np.random.randint(low=min_time, high=max_time+1)
# note the start of the clip and length of the clip
clip_log.append({
'clip_number': rand_clip_num,
'time': time_in_video,
'length': hl_length
})
# now append the random clip and add the length of the time to the total video time
r_clip = r_clip.subclip(t_start=0, t_end=hl_length)
cliplist.append(r_clip)
time_in_video += hl_length
# now just save the video
final_clip = concatenate_videoclips(cliplist)
final_clip.write_videofile('./{}.mp4'.format(vid_path))
# and save the clip log in a txt NOTE THIS DELETES THE PREVIOUS FILE!!
f = open('{}_log.txt'.format(vid_path), 'w')
f.close()
write_file('{}_log.txt'.format(vid_path), 'clip_num(0:leftarm, 1:leftleg, 2:rightarm, 3:rightleg) | time_in_video | length_of_clip\n')
write_file('{}_log.txt'.format(vid_path), 'experiment conducted by: {}\n'.format(name))
write_file('{}_log.txt'.format(vid_path), '-----Note: final blink is at 13 seconds-----\n')
for clip in clip_log:
write_file('{}_log.txt'.format(vid_path), '{} {} {}\n'.format(clip['clip_number'], clip['time'], clip['length']))
if __name__ == '__main__':
gen_clip('nov16_clip3', 'Riley')