diff --git a/yt_dlp/postprocessor/ffmpeg.py b/yt_dlp/postprocessor/ffmpeg.py
index 363f10e6d..b0b05f4fc 100644
--- a/yt_dlp/postprocessor/ffmpeg.py
+++ b/yt_dlp/postprocessor/ffmpeg.py
@@ -797,7 +797,7 @@ class FFmpegSplitChaptersPP(FFmpegPostProcessor):
         return (
             destination,
             ['-ss', compat_str(chapter['start_time']),
-             '-to', compat_str(chapter['end_time'])])
+             '-t', compat_str(chapter['end_time'] - chapter['start_time'])])
 
     def run(self, info):
         chapters = info.get('chapters') or []