YoutubeDL: support download of videos splitted in parts

youtube_dl/YoutubeDL.py

@@ -773,7 +773,23 @@ class YoutubeDL(object):
                 success = True
             else:
                 try:
+                    parts = info_dict.get('parts',[])
+                    if not parts:
                         success = self.fd._do_download(filename, info_dict)
+                    elif len(parts) == 1:
+                        info_dict['url'] = parts[0]
+                        success = self.fd._do_download(filename, info_dict)
+                    else:
+                        parts_success = []
+                        parts_files = []
+                        self.to_screen(u'[info] Downloading %s parts' % len(parts))
+                        for (i, part_url) in enumerate(parts):
+                            part_info = dict(info_dict)
+                            part_info['url'] = part_url
+                            part_filename = u'%s.%s' % (filename, i)
+                            parts_files.append(part_filename)
+                            parts_success.append(self.fd._do_download(part_filename, part_info))
+                        success = all(parts_success)
                 except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
                     self.report_error(u'unable to download video data: %s' % str(err))
                     return

youtube_dl/extractor/common.py

@@ -55,6 +55,7 @@ class InfoExtractor(object):
     subtitles:      The subtitle file contents as a dictionary in the format
                     {language: subtitles}.
     view_count:     How many users have watched the video on the platform.
+    parts:          A list of urls for each of the parts of the video.
     urlhandle:      [internal] The urlHandle to be used to download the file,
                     like returned by urllib.request.urlopen
     age_limit:      Age restriction for the video, as an integer (years)