[downloader/hls] Encode filename (Fixes #2609)

youtube_dl/downloader/hls.py

@@ -13,8 +13,10 @@ class HlsFD(FileDownloader):
         self.report_destination(filename)
         tmpfilename = self.temp_name(filename)
 
-        args = ['-y', '-i', url, '-f', 'mp4', '-c', 'copy',
+        args = [
-            '-bsf:a', 'aac_adtstoasc', tmpfilename]
+            '-y', '-i', url, '-f', 'mp4', '-c', 'copy',
+            '-bsf:a', 'aac_adtstoasc',
+            encodeFilename(tmpfilename, for_subprocess=True)]
 
         for program in ['avconv', 'ffmpeg']:
             try: