From a94bfd6cfe07874f600f0e3c2edd071a1a0a0c4e Mon Sep 17 00:00:00 2001
From: pukkandan <pukkandan.ytdlp@gmail.com>
Date: Sat, 20 Mar 2021 09:15:45 +0530
Subject: [PATCH] [splitchapters] Fix for older ffmpeg

Older versions of ffmpeg doesn't allow `-to` as an input option
Closes #180
---
 yt_dlp/postprocessor/ffmpeg.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 []