X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=youtube_dl%2Fextractor%2Ftwitch.py;h=dc5ff29c3f20545c30ad2b185305e4731774849c;hb=a61ce71468cb222338ccd8039dc631f3619dc585;hp=26661fdf635c2891fad68e695595e45b1aad0e51;hpb=db348e88495bd87adcf058bb6c0a26c1fc591f4f;p=youtube-dl

diff --git a/youtube_dl/extractor/twitch.py b/youtube_dl/extractor/twitch.py
index 26661fdf6..dc5ff29c3 100644
--- a/youtube_dl/extractor/twitch.py
+++ b/youtube_dl/extractor/twitch.py
@@ -51,7 +51,9 @@ class TwitchBaseIE(InfoExtractor):
                 expected=True)
 
     def _call_api(self, path, item_id, *args, **kwargs):
-        kwargs.setdefault('headers', {})['Client-ID'] = self._CLIENT_ID
+        headers = kwargs.get('headers', {}).copy()
+        headers['Client-ID'] = self._CLIENT_ID
+        kwargs['headers'] = headers
         response = self._download_json(
             '%s/%s' % (self._API_BASE, path), item_id,
             *args, **compat_kwargs(kwargs))
@@ -132,9 +134,14 @@ class TwitchBaseIE(InfoExtractor):
     def _prefer_source(self, formats):
         try:
             source = next(f for f in formats if f['format_id'] == 'Source')
-            source['preference'] = 10
+            source['quality'] = 10
         except StopIteration:
-            pass  # No Source stream present
+            for f in formats:
+                if '/chunked/' in f['url']:
+                    f.update({
+                        'quality': 10,
+                        'format_note': 'Source',
+                    })
         self._sort_formats(formats)