[f4m] Add missing imports

diff --git a/youtube_dl/downloader/f4m.py b/youtube_dl/downloader/f4m.py
index f478fc03cda121698611f1474d37c7448465597f..174180db5bd4e5e42fca7a9feecdf8af4ea5e155 100644 (file)
--- a/youtube_dl/downloader/f4m.py
+++ b/youtube_dl/downloader/f4m.py
@@ -13,6 +13,8 @@ from ..compat import (
     compat_urllib_error,
 )
 from ..utils import (
+    encodeFilename,
+    sanitize_open,
     struct_pack,
     struct_unpack,
     xpath_text,