Document that format_id field should be present

11 years ago · 5d4f3985be
parent 360babf799
commit 5d4f3985be
1 changed files with 2 additions and 1 deletions
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@ -51,7 +51,8 @@ class InfoExtractor(object):
                                 Calculated from the format_id, width, height.
                                 and format_note fields if missing.
                    * format_id  A short description of the format
-                                 ("mp4_h264_opus" or "19")
+                                 ("mp4_h264_opus" or "19").
+                                Technically optional, but strongly recommended.
                    * format_note Additional info about the format
                                 ("3D" or "DASH video")
                    * width      Width of the video, if known