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December 16, 2015 14:39
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Python script to extract arbitrary gifs from mkv files. Subtitle support through a horribly convoluted method.
Dependencies: ffmpeg, mkvextract, imagemagick, and the python module docopt
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| #!/usr/bin/env python | |
| """Extract animated gifs from mkv files | |
| Usage: | |
| mkv2gif.py [options] <input> <output> | |
| mkv2gif.py (-h | --help) | |
| mkv2gif.py --version | |
| Options: | |
| -h --help Show this screen. | |
| --version Show version. | |
| --start=<pos> Start position in HH:MM:SS format Default is 00:00:00 | |
| --length=<len> Length in seconds. Omit to keep going until the end. | |
| --resolution=<res> Output resolution. Default is 640x360 | |
| --fuzz=<fuz%> Fuzz factor as percentage | |
| --subs=<track> Subtitle Track. Omit for no subs | |
| """ | |
| from docopt import docopt | |
| import os | |
| import subprocess | |
| from shlex import quote | |
| from tempfile import mkdtemp | |
| from shutil import rmtree | |
| if __name__ == '__main__': | |
| arguments = docopt(__doc__, version='mkv2gif 0.1') | |
| print(arguments) | |
| tmpdir = mkdtemp() | |
| subs = os.path.join(tmpdir, "subs.ass") | |
| mp4 = os.path.join(tmpdir, "tmp.mp4") | |
| frames = os.path.join(tmpdir, arguments['<output>']+"%05d.gif") | |
| length = '' | |
| if arguments.get('--length') is not None: | |
| length = '-t ' + arguments.get('--length') | |
| start = '' | |
| if arguments.get('--start') is not None: | |
| start = '-ss ' + arguments.get('--start') | |
| res = '-s 640x360' | |
| if arguments.get('--resolution') is not None: | |
| res = '-s ' + arguments.get('--resolution') | |
| if(arguments['--subs']): | |
| command = "mkvextract tracks {} {}:{}".format( | |
| quote(arguments['<input>']), | |
| arguments['--subs'], | |
| subs) | |
| print("Extracting subs...") | |
| print('>'+command) | |
| subprocess.call(command, shell=True) | |
| command = "ffmpeg {} -i {} -strict -2 -sn -vcodec libx264 {} -vf ass={} {}".format( | |
| length, | |
| quote(arguments['<input>']), | |
| start, | |
| subs, | |
| mp4) | |
| print('>'+command) | |
| subprocess.call(command, shell=True) | |
| command = "ffmpeg -i {} {} {}".format( | |
| mp4, | |
| res, | |
| frames) | |
| print('>'+command) | |
| subprocess.call(command, shell=True) | |
| else: | |
| command = "ffmpeg {} {} -i {} {} {}".format( | |
| start, | |
| length, | |
| quote(arguments['<input>']), | |
| res, | |
| frames) | |
| print('>'+command) | |
| subprocess.call(command, shell=True) | |
| fuzz_factor='' | |
| if arguments['--fuzz'] is not None: | |
| fuzz_factor="-fuzz " + arguments['--fuzz'] | |
| command = "convert -delay 5 -loop 0 {} -layers optimize-transparency {} {}.gif".format( | |
| fuzz_factor, | |
| os.path.join(tmpdir, arguments['<output>']+"*.gif"), | |
| arguments['<output>']) | |
| print('>'+command) | |
| subprocess.call(command, shell=True) | |
| rmtree(tmpdir) |
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