From e464e56115ae3f8859eb43a7200ce83ae98b821d Mon Sep 17 00:00:00 2001
From: ClosedPort22 <44864697+ClosedPort22@users.noreply.github.com>
Date: Tue, 20 Aug 2024 18:48:20 +0800
Subject: [PATCH] [SubtitleConvertor] Do not attempt to convert unsupported
 formats

---
 yt_dlp/postprocessor/ffmpeg.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/yt_dlp/postprocessor/ffmpeg.py b/yt_dlp/postprocessor/ffmpeg.py
index 164c46d143..0f64a9b94e 100644
--- a/yt_dlp/postprocessor/ffmpeg.py
+++ b/yt_dlp/postprocessor/ffmpeg.py
@@ -972,9 +972,9 @@ class FFmpegSubtitlesConvertorPP(FFmpegPostProcessor):
             if ext == new_ext:
                 self.to_screen(f'Subtitle file for {new_ext} is already in the requested format')
                 continue
-            elif ext == 'json':
+            elif ext not in self.SUPPORTED_EXTS:
                 self.to_screen(
-                    'You have requested to convert json subtitles into another format, '
+                    f'You have requested to convert {ext} subtitles into another format, '
                     'which is currently not possible')
                 continue
             old_file = sub['filepath']