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79 lines
2.0 KiB
Python
79 lines
2.0 KiB
Python
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import atexit
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import tempfile
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import os
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import subprocess
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from uuid import uuid4
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from shutil import rmtree
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import argh
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from PIL import Image
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import cv2
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import numpy
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@argh.arg('videos', nargs='*')
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def main(output_file, videos, maxlen=900):
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image = Image.new('RGB', (maxlen, len(videos)))
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tempdir = tempfile.mkdtemp()
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atexit.register(lambda: rmtree(tempdir, ignore_errors=True))
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for row, video in enumerate(videos):
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print "Processing video {}: {}".format(row, video)
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rowdir = os.path.join(tempdir, str(uuid4()))
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os.mkdir(rowdir)
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subprocess.check_call([
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'ffmpeg', '-hide_banner',
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'-i', video,
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'-r', '2',
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os.path.join(rowdir, 'frame%08d.png'),
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])
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for i, frame in enumerate(sorted(os.listdir(rowdir))):
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print "Processing frame {}".format(frame)
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filepath = os.path.join(rowdir, frame)
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if i >= maxlen:
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break
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## resize to 1,1, mostly center pixel
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#color = Image.open(filepath).resize((1, 1)).convert('RGB').getpixel((0, 0))
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## avg without black, in python
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#frame_im = Image.open(filepath).convert('RGB')
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#avg_color = (0, 0, 0)
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#count = 0
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#for color in frame_im.getdata():
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# if color != (0,0,0):
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# avg_color = tuple(a + b for a, b in zip(avg_color, color))
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# count += 1
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#if count > 0:
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# avg_color = tuple(a / count for a in avg_color)
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#else:
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# avg_color = (0, 0, 0)
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#image.putpixel((i, row), tuple(avg_color))
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## true avg using numpy
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#avg_per_row = numpy.average(cv2.imread(filepath), axis=0)
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#avg = numpy.average(avg_per_row, axis=0)
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#image.putpixel((i, row), tuple(map(int, avg)))
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## avg without black, numpy
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im = cv2.imread(filepath)
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non_black = im[im.sum(axis=2) != 0]
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avg = numpy.average(non_black, axis=0)
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try:
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# note numpy flips the RGB values to BGR for some reason, so flip back
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color = tuple(map(int, avg))[::-1]
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except ValueError: # avg is NaN because all pixels black
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color = (0, 0, 0)
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image.putpixel((i, row), color)
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rmtree(rowdir)
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image.save(output_file)
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if __name__ == '__main__':
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argh.dispatch_command(main)
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