Use YouTube as fallback for track metadata if not found on Spotify

spotdl/patcher.py

@@ -0,0 +1,31 @@
+import pafy
+
+from spotdl import internals
+
+
+def _getbestthumb(self):
+    url = self._ydl_info["thumbnails"][0]["url"]
+    if url:
+        return url
+
+    part_url = "http://i.ytimg.com/vi/%s/" % self.videoid
+    # Thumbnail resolution sorted in descending order
+    thumbs = ("maxresdefault.jpg",
+              "sddefault.jpg",
+              "hqdefault.jpg",
+              "mqdefault.jpg",
+              "default.jpg")
+    for thumb in thumbs:
+        url = part_url + thumb
+        if self._content_available(url):
+            return url
+
+
+@classmethod
+def _content_available(cls, url):
+    return internals.content_available(url)
+
+def patch_pafy():
+    pafy.backend_shared.BasePafy._bestthumb = None
+    pafy.backend_shared.BasePafy._content_available = _content_available
+    pafy.backend_shared.BasePafy.getbestthumb = _getbestthumb