diff --git a/yt_dlp/YoutubeDL.py b/yt_dlp/YoutubeDL.py index 3186a999d..3130deda3 100644 --- a/yt_dlp/YoutubeDL.py +++ b/yt_dlp/YoutubeDL.py @@ -4381,7 +4381,9 @@ class YoutubeDL: return None for idx, t in list(enumerate(thumbnails))[::-1]: - thumb_ext = (f'{t["id"]}.' if multiple else '') + determine_ext(t['url'], 'jpg') + thumb_ext = t.get('ext') or determine_ext(t['url'], 'jpg') + if multiple: + thumb_ext = f'{t["id"]}.{thumb_ext}' thumb_display_id = f'{label} thumbnail {t["id"]}' thumb_filename = replace_extension(filename, thumb_ext, info_dict.get('ext')) thumb_filename_final = replace_extension(thumb_filename_base, thumb_ext, info_dict.get('ext')) diff --git a/yt_dlp/extractor/common.py b/yt_dlp/extractor/common.py index 01915acf2..23f6fc6c4 100644 --- a/yt_dlp/extractor/common.py +++ b/yt_dlp/extractor/common.py @@ -279,6 +279,7 @@ class InfoExtractor: thumbnails: A list of dictionaries, with the following entries: * "id" (optional, string) - Thumbnail format ID * "url" + * "ext" (optional, string) - actual image extension if not given in URL * "preference" (optional, int) - quality of the image * "width" (optional, int) * "height" (optional, int)