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-rw-r--r--youtube_dl/downloader/external.py7
1 files changed, 3 insertions, 4 deletions
diff --git a/youtube_dl/downloader/external.py b/youtube_dl/downloader/external.py
index faac11805..ff031d2e0 100644
--- a/youtube_dl/downloader/external.py
+++ b/youtube_dl/downloader/external.py
@@ -46,11 +46,10 @@ class ExternalFD(FileDownloader):
return info_dict['protocol'] in ('http', 'https', 'ftp', 'ftps')
def _source_address(self, command_option):
- command_part = []
source_address = self.params.get('source_address')
- if source_address:
- command_part = [command_option, source_address]
- return command_part
+ if source_address is None:
+ return []
+ return [command_option, source_address]
def _call_downloader(self, tmpfilename, info_dict):
""" Either overwrite this or implement _make_cmd """