| 1 | #!/usr/bin/env python |
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| 2 | # -*- coding: utf-8 -*- |
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| 3 | u""" |
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| 4 | Reads an RSS/Atom feed and converts the enclosures to AVI. |
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| 5 | |
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| 6 | Dependencies: |
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| 7 | |
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| 8 | - ``flvstreamer`` for the RTMP streams |
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| 9 | - ``mimms`` for the MMS streams |
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| 10 | - ``file`` to get the sizes of the videos |
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| 11 | - ``mencoder`` to do the conversion |
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| 12 | - ``tedtalksubs.py`` to dowload ted talks subtitles (in this repo) |
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| 13 | |
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| 14 | :Authors: |
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| 15 | Aurélien Bompard <aurelien@bompard.org> <http://aurelien.bompard.org> |
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| 16 | |
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| 17 | :License: |
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| 18 | GNU GPL v3 or later |
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| 19 | """ |
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| 20 | |
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| 21 | import os |
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| 22 | import sys |
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| 23 | import urllib2 |
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| 24 | import httplib |
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| 25 | import glob |
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| 26 | import subprocess |
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| 27 | import re |
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| 28 | import tempfile |
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| 29 | import atexit |
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| 30 | from urlparse import urlparse |
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| 31 | from optparse import OptionParser |
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| 32 | from stat import S_IRUSR, S_IWUSR, S_IROTH, S_IRGRP |
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| 33 | #from xml.etree import ElementTree as ET |
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| 34 | from pprint import pprint |
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| 35 | |
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| 36 | from lxml import etree as ET |
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| 37 | import urlgrabber |
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| 38 | import urlgrabber.progress |
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| 39 | |
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| 40 | # Tags to skip |
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| 41 | EXCLUDE_TAGS = "" |
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| 42 | # Max size of the encoded video |
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| 43 | WIDTH = 800 |
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| 44 | HEIGHT = 480 |
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| 45 | # Default MIME type |
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| 46 | MIME_DEFAULT = "video/x-msvideo" |
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| 47 | EXTENSION = "avi" |
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| 48 | |
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| 49 | |
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| 50 | def get_options(): |
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| 51 | usage = "usage: %prog -i input_feed -u URL -o output_feed [-d directory]" |
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| 52 | parser = OptionParser(usage=usage) |
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| 53 | parser.add_option("-i", "--input", dest="input", |
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| 54 | help="Process this file") |
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| 55 | parser.add_option("-o", "--output", dest="output", |
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| 56 | help="Write the RSS in this file") |
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| 57 | parser.add_option("-d", "--directory", dest="directory", |
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| 58 | help="Write the converted videos in this directory") |
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| 59 | parser.add_option("-u", "--url", dest="url", |
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| 60 | help="The external URL of the video folder") |
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| 61 | parser.add_option("-W", "--width", dest="width", type="int", default=WIDTH, |
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| 62 | help="Width of the converted video [default: %default]") |
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| 63 | parser.add_option("-H", "--height", dest="height", type="int", default=HEIGHT, |
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| 64 | help="Height of the converted video [default: %default]") |
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| 65 | parser.add_option("-m", "--max", dest="max", type="int", default=10, |
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| 66 | help="Only convert that many videos, drop the rest [default: %default]") |
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| 67 | parser.add_option("-q", "--quiet", dest="quiet", action="store_true", |
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| 68 | default=False, help="Don't show progress bars") |
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| 69 | parser.add_option("-k", "--keep", dest="keep", action="store_true", |
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| 70 | default=False, help="Don't remove original files") |
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| 71 | parser.add_option("--exclude-tags", dest="exclude_tags", |
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| 72 | default=EXCLUDE_TAGS, help="Drop videos tagged with a " |
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| 73 | "tag in this comma-sparated list [default: %default]") |
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| 74 | parser.add_option("--subtitles", dest="subtitles", metavar="LANG", |
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| 75 | help="Download subtitles in this language") |
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| 76 | parser.add_option("--old-ffmpeg", dest="oldffmpeg", action="store_true", |
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| 77 | help="FFMpeg is old (like on Debian Lenny)") |
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| 78 | options, args = parser.parse_args() |
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| 79 | if len(args) > 0: |
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| 80 | parser.error("illegal arguments: %s" % ", ".join(args)) |
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| 81 | if not options.input: |
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| 82 | parser.error("I need a file to process") |
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| 83 | if not os.path.exists(options.input): |
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| 84 | parser.error("The file to process does not exist") |
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| 85 | if not options.output: |
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| 86 | parser.error("I need a file to write to") |
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| 87 | if not options.url: |
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| 88 | parser.error("I need an external URL") |
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| 89 | if not options.directory and options.input != "-": |
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| 90 | options.directory = os.path.abspath(os.path.dirname(options.input)) |
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| 91 | if not options.directory: |
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| 92 | parser.error("I need a directory for the videos") |
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| 93 | if not options.quiet and "TERM" not in os.environ: |
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| 94 | options.quiet = True # Not in a terminal, be quiet anyway |
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| 95 | if isinstance(options.exclude_tags, basestring): |
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| 96 | options.exclude_tags = [ t.strip() for t in |
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| 97 | options.exclude_tags.split(",") ] |
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| 98 | return options, args |
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| 99 | |
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| 100 | |
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| 101 | class PodcastError(Exception): pass |
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| 102 | class NotAPodcastError(PodcastError): pass |
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| 103 | class TranscodingError(PodcastError): pass |
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| 104 | class DownloadingError(PodcastError): pass |
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| 105 | |
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| 106 | |
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| 107 | class Podcast(object): |
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| 108 | |
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| 109 | _mimetypes = {} |
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| 110 | |
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| 111 | def __init__(self, item): |
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| 112 | self.item = item |
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| 113 | self.enclosure = item.find("enclosure") |
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| 114 | if not ET.iselement(self.enclosure): |
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| 115 | raise NotAPodcastError() |
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| 116 | self.url = self._get_url() |
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| 117 | self.path_downloaded = self._get_downloaded_path() |
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| 118 | self.content_type = self._get_content_type() |
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| 119 | self.path_encoded = self._get_encoded_path() |
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| 120 | self.subs = self._get_subtitles() |
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| 121 | self.video_info = None |
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| 122 | self.size = None |
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| 123 | |
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| 124 | def _get_url(self): |
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| 125 | url = self.enclosure.get("url") |
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| 126 | if url.startswith(options.url): |
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| 127 | return url |
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| 128 | # Resolve redirects |
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| 129 | try: |
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| 130 | remote_file = urllib2.urlopen(url) |
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| 131 | url = remote_file.geturl() |
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| 132 | self.content_type = remote_file.info().get("Content-Type") |
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| 133 | remote_file.close() |
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| 134 | except (urllib2.HTTPError, httplib.HTTPException), e: |
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| 135 | print "Failed downloading %s" % url |
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| 136 | print e |
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| 137 | except urllib2.URLError, e: |
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| 138 | print "Probably RTMP or MMS: %s" % url |
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| 139 | return url |
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| 140 | |
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| 141 | def _get_content_type(self): |
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| 142 | if getattr(self, "content_type", None): |
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| 143 | return self.content_type # already set by _get_url() |
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| 144 | if "content-type" in self.enclosure.attrib: |
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| 145 | return self.enclosure.attrib.get("content-type") |
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| 146 | for extension, mimetype in self.mimetypes.iteritems(): |
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| 147 | if self.path_downloaded.endswith("."+extension): |
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| 148 | return mimetype |
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| 149 | return MIME_DEFAULT |
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| 150 | |
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| 151 | def _get_downloaded_path(self): |
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| 152 | url_obj = urlparse(self.url) |
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| 153 | filename = os.path.basename(url_obj.path) |
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| 154 | if filename.count("?"): |
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| 155 | filename = filename[:filename.index("?")] |
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| 156 | return os.path.join(options.directory, filename) |
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| 157 | |
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| 158 | def _get_encoded_path(self): |
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| 159 | if self.content_type.startswith("audio/"): |
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| 160 | # the file won't be transcoded |
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| 161 | return self.path_downloaded |
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| 162 | filename_encoded = "%s.%s" % ( |
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| 163 | os.path.splitext(self.path_downloaded)[0], EXTENSION) |
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| 164 | return os.path.join(options.directory, filename_encoded) |
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| 165 | |
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| 166 | def _get_subtitles(self): |
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| 167 | if not options.subtitles: |
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| 168 | return None |
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| 169 | subfile, subfile_path = tempfile.mkstemp(prefix="podcast-transcode-sub-", |
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| 170 | suffix=".srt") |
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| 171 | os.close(subfile) |
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| 172 | atexit.register(os.remove, subfile_path) |
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| 173 | if (flux_xml.findtext("channel/title") == "TEDTalks (video)" or |
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| 174 | flux_xml.findtext("channel/title") == "TEDTalks (hd)"): |
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| 175 | talkid = self.item.findtext("guid").split(":")[1] |
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| 176 | subdl = subprocess.Popen(["tedtalksubs.py", "-l", options.subtitles, |
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| 177 | "-o", subfile_path, talkid], |
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| 178 | stdout=subprocess.PIPE, |
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| 179 | stderr=subprocess.STDOUT) |
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| 180 | out, err = subdl.communicate() |
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| 181 | if subdl.returncode != 0: |
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| 182 | print >>sys.stderr, "Failed to download subtitles. Message:" |
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| 183 | print >>sys.stderr, out |
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| 184 | return None |
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| 185 | return subfile_path |
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| 186 | return None |
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| 187 | |
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| 188 | def _get_mimetypes(self): |
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| 189 | if self._mimetypes: |
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| 190 | return self._mimetypes |
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| 191 | mimetypes_re = re.compile("\s*([^\s]+)\s+([^\s]+)\s*") |
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| 192 | mimetypes = open("/etc/mime.types") |
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| 193 | for line in mimetypes: |
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| 194 | line_mo = mimetypes_re.match(line) |
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| 195 | if not line_mo: |
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| 196 | continue |
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| 197 | mimetype = line_mo.group(1) |
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| 198 | extension = line_mo.group(2) |
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| 199 | if not mimetype.startswith("video/") \ |
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| 200 | and not mimetype.startswith("audio/"): |
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| 201 | continue |
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| 202 | self._mimetypes[line_mo.group(2)] = line_mo.group(1) |
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| 203 | mimetypes.close() |
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| 204 | return self._mimetypes |
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| 205 | mimetypes = property(_get_mimetypes) |
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| 206 | |
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| 207 | def is_already_transcoded(self): |
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| 208 | return self.url.startswith(options.url) |
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| 209 | |
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| 210 | def process(self): |
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| 211 | if not os.path.exists(self.path_encoded): |
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| 212 | self.download() |
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| 213 | self.encode_video() |
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| 214 | else: |
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| 215 | print "Already downloaded/encoded: %s" % self.path_encoded |
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| 216 | self.url = "%s/%s" % (options.url, os.path.basename(self.path_encoded)) |
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| 217 | self.size = int(os.stat(self.path_encoded).st_size) |
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| 218 | self.update_item() |
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| 219 | |
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| 220 | def update_item(self): |
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| 221 | self.enclosure.set("url", self.url) |
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| 222 | self.enclosure.set("length", str(self.size)) |
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| 223 | self.enclosure.set("type", self.content_type) |
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| 224 | fb = self.item.find("{http://rssnamespace.org/feedburner/ext/1.0}origEnclosureLink") |
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| 225 | if ET.iselement(fb): |
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| 226 | fb.text = self.url |
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| 227 | mediacontent = self.item.find("{http://search.yahoo.com/mrss/}content") |
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| 228 | if ET.iselement(mediacontent): |
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| 229 | mediacontent.set("url", self.url) |
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| 230 | mediacontent.set("fileSize", str(self.size)) |
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| 231 | mediacontent.set("type", self.content_type) |
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| 232 | |
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| 233 | def download(self): |
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| 234 | if os.path.exists(self.path_downloaded): |
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| 235 | print "Already downloaded: %s" % self.path_downloaded |
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| 236 | return |
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| 237 | if self.url.startswith("rtmp://"): |
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| 238 | self.download_rtmp() |
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| 239 | elif self.url.startswith("mms://"): |
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| 240 | self.download_mms() |
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| 241 | elif self.content_type and self.content_type == "video/x-ms-asf": |
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| 242 | self.download_asf() |
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| 243 | else: |
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| 244 | if options.quiet: |
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| 245 | progress = urlgrabber.progress.BaseMeter() |
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| 246 | else: |
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| 247 | progress = urlgrabber.progress.TextMeter(fo=sys.stdout) |
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| 248 | print "Downloading %s to %s" % (self.url, self.path_downloaded) |
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| 249 | try: |
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| 250 | urlgrabber.urlgrab(self.url, filename=self.path_downloaded, |
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| 251 | reget='simple', progress_obj=progress) |
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| 252 | except urlgrabber.grabber.URLGrabError, e: |
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| 253 | raise DownloadingError("Error downloading %s: %s" |
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| 254 | % (self.url, e)) |
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| 255 | |
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| 256 | def download_rtmp(self): |
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| 257 | MAX_TRIES = 10 |
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| 258 | def download_rtmp_unit(url, path): |
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| 259 | command = ["flvstreamer", "-r", url, "-o", path] |
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| 260 | if options.quiet: |
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| 261 | command.append("-q") |
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| 262 | if os.path.exists(path): |
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| 263 | command.insert(1, "--resume") |
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| 264 | print "Streaming %s to %s" % (url, path) |
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| 265 | retcode = 0 |
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| 266 | try: |
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| 267 | retcode = subprocess.call(command) |
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| 268 | except KeyboardInterrupt: |
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| 269 | retcode = 1 |
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| 270 | return retcode |
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| 271 | |
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| 272 | retcode = download_rtmp_unit(self.url, self.path_downloaded) |
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| 273 | # flvstreamer returns 2 if the download is incomplete |
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| 274 | current_try = 1 |
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| 275 | while retcode == 2: |
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| 276 | print "Trying again..." |
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| 277 | retcode = download_rtmp_unit(self.url, self.path_downloaded) |
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| 278 | current_try += 1 |
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| 279 | if current_try > MAX_TRIES: |
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| 280 | print "Too many tries, aborting." |
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| 281 | break |
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| 282 | if retcode != 0: |
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| 283 | if os.path.exists(self.path_downloaded): |
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| 284 | os.remove(self.path_downloaded) |
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| 285 | raise DownloadingError("Error code: %s" % retcode) |
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| 286 | |
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| 287 | def download_mms(self): |
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| 288 | #command = ["mplayer", "-dumpstream", "-dumpfile", self.path_downloaded, self.url] |
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| 289 | command = ["mimms", self.url, self.path_downloaded] |
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| 290 | if options.quiet: |
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| 291 | command.append("-q") |
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| 292 | try: |
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| 293 | print "Streaming %s to %s" % (self.url, self.path_downloaded) |
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| 294 | retcode = 0 |
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| 295 | retcode = subprocess.call(command) |
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| 296 | except KeyboardInterrupt: |
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| 297 | retcode = 1 |
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| 298 | if retcode != 0 and os.path.exists(self.path_downloaded): |
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| 299 | os.remove(self.path_downloaded) |
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| 300 | raise DownloadingError("Error code: %s" % retcode) |
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| 301 | |
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| 302 | def download_asf(self): |
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| 303 | mms_xml = urllib2.urlopen(self.url).read() |
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| 304 | mms_match = re.search('"(mms://.*)"', mms_xml) |
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| 305 | mms_url = mms_match.group(1) |
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| 306 | return download_mms(mms_url.replace("&", "&"), self.path_downloaded) |
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| 307 | |
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| 308 | def encode_video(self): |
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| 309 | if self.path_encoded == self.path_downloaded: |
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| 310 | print "No transcoding required" |
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| 311 | return |
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| 312 | transcoded_video = self._transcode_video() |
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| 313 | os.rename(transcoded_video, self.path_encoded) |
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| 314 | os.chmod(self.path_encoded, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) # 644 |
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| 315 | |
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| 316 | def _transcode_video(self): |
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| 317 | width, height = self.get_video_info() |
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| 318 | transcoded_video_file, transcoded_video = tempfile.mkstemp( |
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| 319 | prefix="podcast-transcode-", suffix=".avi", dir=options.directory) |
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| 320 | os.close(transcoded_video_file) |
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| 321 | def rm_if_exists(f): |
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| 322 | if os.path.exists(f): |
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| 323 | os.remove(f) |
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| 324 | if not options.keep: |
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| 325 | atexit.register(rm_if_exists, transcoded_video) |
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| 326 | command = ["mencoder", "-oac", "mp3lame", |
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| 327 | "-ovc", "lavc", "-lavcopts", "vbitrate=600", |
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| 328 | "-of", "avi", "-mc", "0", self.path_downloaded, |
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| 329 | "-o", transcoded_video] |
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| 330 | if height and width: |
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| 331 | if int(height) > options.height: |
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| 332 | command.extend(["-vf", "scale=-3:%d" % options.height]) |
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| 333 | elif int(width) > options.width: |
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| 334 | command.extend(["-vf", "scale=%d:-3" % options.width]) |
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| 335 | if options.quiet: |
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| 336 | command.append("-quiet") |
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| 337 | if self.subs: |
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| 338 | command.extend(["-sub", self.subs, "-subfont-text-scale", "4"]) |
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| 339 | if not os.path.exists(os.path.expanduser("~/.mplayer/subfont.ttf")): |
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| 340 | command.extend(["-fontconfig", "-font", "DejaVu Sans"]) |
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| 341 | print " ".join(command) |
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| 342 | retcode = 0 |
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| 343 | try: |
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| 344 | print "Encoding %s to %s" % (self.path_downloaded, transcoded_video) |
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| 345 | retcode = subprocess.call(command) |
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| 346 | except KeyboardInterrupt: |
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| 347 | retcode = 1 |
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| 348 | if retcode != 0: |
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| 349 | if os.path.exists(transcoded_video): |
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| 350 | os.remove(transcoded_video) |
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| 351 | raise TranscodingError("Error code: %s" % retcode) |
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| 352 | self.content_type = "video/x-msvideo" |
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| 353 | return transcoded_video |
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| 354 | |
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| 355 | def get_video_info(self): |
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| 356 | if self.video_info is not None: |
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| 357 | return self.video_info |
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| 358 | ffmpeg_cmd = subprocess.Popen(["ffmpeg", "-i", self.path_downloaded], |
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| 359 | stdout=subprocess.PIPE, stderr=subprocess.STDOUT) |
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| 360 | output = ffmpeg_cmd.stdout.read() |
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| 361 | info_match = re.search("Stream .*: Video: (\w+), \w+, (\d+)x(\d+)", output) |
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| 362 | if info_match: |
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| 363 | self.video_info = (info_match.group(2), info_match.group(3)) |
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| 364 | else: |
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| 365 | self.video_info = (None, None) |
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| 366 | return self.video_info |
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| 367 | |
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| 368 | |
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| 369 | def cleanup(items): |
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| 370 | feed_podcasts = set() |
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| 371 | for item in items: |
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| 372 | try: |
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| 373 | podcast = Podcast(item) |
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| 374 | except NotAPodcastError: |
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| 375 | continue |
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| 376 | feed_podcasts.add(os.path.basename(podcast.path_downloaded)) |
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| 377 | feed_podcasts.add(os.path.basename(podcast.path_encoded)) |
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| 378 | |
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| 379 | if options.keep: |
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| 380 | return |
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| 381 | |
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| 382 | for filepath in glob.glob(os.path.join(options.directory, "*")): |
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| 383 | if filepath.endswith(".xml"): |
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| 384 | continue # keep the RSS feed |
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| 385 | filename = os.path.basename(filepath) |
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| 386 | if filename not in feed_podcasts: |
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| 387 | print "Removing old file %s" % filename |
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| 388 | #print feed_podcasts |
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| 389 | os.remove(filepath) |
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| 390 | |
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| 391 | |
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| 392 | def handle_item(item): |
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| 393 | try: |
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| 394 | podcast = Podcast(item) |
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| 395 | except NotAPodcastError: |
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| 396 | return |
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| 397 | |
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| 398 | if podcast.is_already_transcoded(): |
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| 399 | print "Already converted: %s" % podcast.url |
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| 400 | return |
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| 401 | if options.subtitles and not podcast.subs: |
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| 402 | print "No subtitles for %s, skipping." % item.findtext("guid") |
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| 403 | flux_xml.find("channel").remove(item) |
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| 404 | return |
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| 405 | |
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| 406 | try: |
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| 407 | podcast.process() |
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| 408 | except DownloadingError, e: |
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| 409 | print e |
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| 410 | return |
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| 411 | except TranscodingError, e: |
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| 412 | print e |
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| 413 | return |
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| 414 | |
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| 415 | |
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| 416 | def to_skip(item): |
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| 417 | tags = item.findall("category") |
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| 418 | for tag in tags: |
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| 419 | if tag.text in options.exclude_tags: |
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| 420 | return True |
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| 421 | return False |
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| 422 | |
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| 423 | def main(): |
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| 424 | global options, flux_xml |
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| 425 | options, args = get_options() |
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| 426 | if options.input == "-": |
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| 427 | options.input = sys.stdin |
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| 428 | flux_xml = ET.parse(options.input) |
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| 429 | items = flux_xml.findall("channel/item") |
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| 430 | # tag skipping |
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| 431 | for item in items[:]: |
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| 432 | if to_skip(item): |
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| 433 | flux_xml.find("channel").remove(item) |
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| 434 | items.remove(item) |
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| 435 | for i, item in enumerate(items[:]): |
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| 436 | if i < options.max: |
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| 437 | handle_item(item) |
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| 438 | else: |
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| 439 | flux_xml.find("channel").remove(item) |
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| 440 | |
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| 441 | #flux_xml.write(options.output, "utf-8") |
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| 442 | flux_xml.write(options.output) |
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| 443 | cleanup(items[:options.max]) |
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| 444 | |
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| 445 | |
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| 446 | if __name__ == "__main__": |
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| 447 | main() |
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| 448 | |
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