[youtube] Clarify rationale for yt:stretch validation

9 years ago · 5faf9fed7e
1 changed files with 2 additions and 0 deletions
--- a/youtube_dl/extractor/youtube.py
+++ b/youtube_dl/extractor/youtube.py
@ -1514,6 +1514,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
        if stretched_m:
            w = float(stretched_m.group('w'))
            h = float(stretched_m.group('h'))
+            # yt:stretch may hold invalid ratio data (e.g. for Q39EVAstoRM ratio is 17:0).
+            # We will only process correct ratios.
            if w > 0 and h > 0:
                ratio = w / h
                for f in formats: