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generator
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generator
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#!/usr/bin/env python3
"""CBG Thumbnail Generator
Usage:
./generator <video> <width> <height> <columns> <output> <video_preview>
./generator (-h | --help)
./generator --version
Options:
-h --help Show this screen.
--version Show version.
<video> Video file path.
<width> Width of each generator.
<height> Height of each generator.
<columns> Total number of thumbnails per line.
<output> Output.
<video_preview> Preview video path.
"""
import glob
import os
import random
import shutil
import tempfile
import math
from docopt import docopt
from PIL import Image
from click import progressbar
from moviepy.editor import VideoFileClip, ImageClip
from moviepy.video.compositing.concatenate import concatenate_videoclips
TMP_FRAMES_PATH = tempfile.mkdtemp()
def get_output_prefix():
if not os.path.exists(TMP_FRAMES_PATH):
os.makedirs(TMP_FRAMES_PATH)
return TMP_FRAMES_PATH + "/" + ("%032x_" % random.getrandbits(128))
class VideoThumbnailGenerator:
def __init__(self, args):
self.videoFileClip = VideoFileClip(args['<video>'])
self.interval = 10
self.size = (int(args['<width>']), int(args['<height>']))
self.output_prefix = get_output_prefix()
self.video_preview = args['<video_preview>']
self.generate_frames()
self.columns = int(args['<columns>'])
self.output = args['<output>']
self.generate_sprite_from_frames()
def generate_frames(self):
print("Extracting", self.interval, "frames")
frame_count = 0
with progressbar(range(0, int(self.videoFileClip.duration), self.interval)) as items:
for i in items:
self.extract_frame(i, frame_count)
frame_count += 1
print("Frames extracted.")
def extract_frame(self, moment, frame_count):
output = self.output_prefix + ("%05d.jpg" % frame_count)
self.videoFileClip.save_frame(output, t=int(moment))
self.resize_frame(output)
def resize_frame(self, filename):
image = Image.open(filename)
image = image.resize(self.size, Image.ANTIALIAS)
image.save(filename)
def generate_sprite_from_frames(self):
frames_map = sorted(glob.glob(self.output_prefix + "*.jpg"))
master_width = self.size[0] * self.columns
master_height = self.size[1] * int(math.ceil(float(len(frames_map)) / self.columns))
line, column = 0, 0
finalImage = Image.new(mode='RGB', size=(master_width, master_height), color=(0, 0, 0, 0))
for filename in frames_map:
with Image.open(filename) as image:
location_x = self.size[0] * column
location_y = self.size[1] * line
finalImage.paste(image, (location_x, location_y))
column += 1
if column == self.columns:
line += 1
column = 0
finalImage.save(self.output, quality=50, optimize=True, transparency=0)
if not self.video_preview:
shutil.rmtree(TMP_FRAMES_PATH, ignore_errors=True)
else:
self.generate_preview_video(frames_map)
print("Saved!")
def generate_preview_video(self, frames_map):
preview_thumbs = frames_map[0:25]
clips = [ImageClip(m).set_duration(5 / len(preview_thumbs))
for m in preview_thumbs]
concat_clip = concatenate_videoclips(clips, method="compose")
concat_clip.write_videofile(self.video_preview, fps=24)
shutil.rmtree(TMP_FRAMES_PATH, ignore_errors=True)
if __name__ == "__main__":
arguments = docopt(__doc__, version='0.0.2')
VideoThumbnailGenerator(arguments)