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annotate python/example/m3u.py @ 838:3cda483d71b2

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author Jeff Hammel <k0scist@gmail.com>
date Fri, 31 Mar 2017 16:30:52 -0700
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1 #!/usr/bin/env python
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2 # -*- coding: utf-8 -*-
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3
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4 """
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5 m3u playlist manipulator
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6
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7 See:
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8 - https://pypi.python.org/pypi/m3u8
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9 - http://gonze.com/playlists/playlist-format-survey.html#M3U
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10 - http://www.assistanttools.com/articles/m3u_playlist_format.shtml
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11 - http://en.wikipedia.org/wiki/M3U
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12 - http://tools.ietf.org/html/draft-pantos-http-live-streaming-08#section-3.3.1
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13 """
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14
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15 # imports
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16 import argparse
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17 import m3u8
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18 import os
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19 import subprocess
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20 import sys
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21
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22 # module globals
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23 __all__ = ['main', 'M3UParser']
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24 here = os.path.dirname(os.path.realpath(__file__))
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25 string = (str, unicode)
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26
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27 class Playlist(object):
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28 def __init__(self, playlists=(), base_path=None):
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29 self.clips = []
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30 for playlist in playlists:
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31 assert os.path.isfile(playlist)
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32 _base_path = os.path.abspath(base_path or os.path.dirname(os.path.abspath(playlist))) # TODO: this doesn't fix URLs
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33 content = open(playlist).read()
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34 m3u = m3u8.M3U8(content, base_path=_base_path)
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35 for segment in m3u.segments:
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36 path = segment.uri
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37 title = segment.title
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38 self.clips.append((title, path))
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39
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40 def __str__(self):
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41 retval = []
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42 for title, path in self.clips:
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43 if title:
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44 line = '{} # {}'.format(os.path.abspath(path), title)
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45 else:
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46 line = os.path.abspath(path)
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47 retval.append(line)
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48 return '\n'.join(retval)
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49
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50 class M3UParser(argparse.ArgumentParser):
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51 """CLI option parser"""
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52 def __init__(self, **kwargs):
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53 kwargs.setdefault('description', __doc__)
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54 argparse.ArgumentParser.__init__(self, **kwargs)
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55 self.add_argument('playlists', metavar='playlist', nargs='+',
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56 help="playlist to parse")
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57 self.add_argument('-b', '--base', dest='base_path', default=os.getcwd(),
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58 help="base path [DEFAULT: %(default)s]")
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59 self.options = None
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60
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61 def parse_args(self, *args, **kw):
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62 options = argparse.ArgumentParser.parse_args(self, *args, **kw)
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63 self.validate(options)
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64 self.options = options
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65 return options
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66
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67 def validate(self, options):
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68 """validate options"""
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69 if not os.path.exists(options.base_path):
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70 self.error("Base path '{}' does not exist".format(options.base_path))
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71 missing = [i for i in options.playlists
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72 if not os.path.exists(i)]
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73 if missing:
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74 self.error("Playlist not found: {}".format(', '.join(missing)))
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75
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76 def main(args=sys.argv[1:]):
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77 """CLI"""
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78
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79 # parse command line options
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80 parser = M3UParser()
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81 options = parser.parse_args(args)
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82
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83 # create playlist
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84 playlist = Playlist(options.playlists, options.base_path)
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85
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86 # print out some things
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87 print ('{}'.format(playlist))
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88
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89 if __name__ == '__main__':
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90 main()