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generate_frames.py
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generate_frames.py
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import os
import cv2
import click
def get_video_duration(vidcap):
fps = vidcap.get(cv2.CAP_PROP_FPS) # OpenCV2 version 2 used "CV_CAP_PROP_FPS"
frame_count = int(vidcap.get(cv2.CAP_PROP_FRAME_COUNT))
duration = frame_count / fps
return duration * 1000
def get_folder_name(filename):
to_folder = filename.split('/')
to_folder[-2] = 'frames_padding'
upper_folder = to_folder[:-1]
to_folder = '/'.join(to_folder)
upper_folder = '/'.join(upper_folder)
if not os.path.isdir(upper_folder):
os.mkdir(upper_folder)
if not os.path.isdir(to_folder):
os.mkdir(to_folder)
return to_folder
def get_frames(filename):
vidcap = cv2.VideoCapture(filename)
to_folder = get_folder_name(filename)
count = 0
duration = get_video_duration(vidcap)
video_left = 10 * 1000 - duration # Videos are supposed to last 10 sec
first_image = None
while True:
vidcap.set(cv2.CAP_PROP_POS_MSEC, count * 100)
success, image = vidcap.read()
if first_image is None:
first_image = image
if not success:
break
cv2.imwrite(os.path.join(to_folder, "{:06d}.png".format(int(video_left / 100) + count)),
image) # save frame as JPEG file
count += 1
for i in range(int(video_left / 100)):
cv2.imwrite(os.path.join(to_folder, "{:06d}.png".format(i)),
first_image) # first images (black) will be set like the first one
print("{} images are extacted in {}.".format(count, to_folder))
@click.command()
@click.option('--folder', help='Folder where the mp4 videos are')
def main(folder):
full_name_files = [os.path.join(folder, file) for file in os.listdir(folder)]
for idx, filename in enumerate(full_name_files[:]):
get_frames(filename)
if not idx % 50:
print('Left {}'.format(len(full_name_files) - idx))
return 0
if __name__ == '__main__':
main()