From c110944fa2f21af733b4f3168764e1b008e11514 Mon Sep 17 00:00:00 2001
From: "M.K" <mk-pmb@users.noreply.github.com>
Date: Tue, 3 Oct 2017 22:50:27 +0200
Subject: [PATCH] [extractor/common] Fix typo in _parse_mpd_formats

---
 youtube_dl/extractor/common.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 2bbbf8f4d..a878550c2 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -1920,7 +1920,7 @@ class InfoExtractor(object):
                             # can't be used at the same time
                             if '%(Number' in media_template and 's' not in representation_ms_info:
                                 segment_duration = None
-                                if 'total_number' not in representation_ms_info and 'segment_duration':
+                                if 'total_number' not in representation_ms_info and 'segment_duration' in representation_ms_info:
                                     segment_duration = float_or_none(representation_ms_info['segment_duration'], representation_ms_info['timescale'])
                                     representation_ms_info['total_number'] = int(math.ceil(float(period_duration) / segment_duration))
                                 representation_ms_info['fragments'] = [{