diff --git a/CHANGELOG b/CHANGELOG
index 3125145..b0e9e13 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,8 @@
+== 8.4.1 2026-04-01
+
+Fixes:
+* Correctly detect the file extension for `asf_o`, `live_flv`, `mpegvideo` and `mpegtsraw` formats.
+
 == 8.4.0 2026-03-20
 
 Improvements:
diff --git a/lib/ffmpeg/media.rb b/lib/ffmpeg/media.rb
index 6e03db0..b6007b6 100644
--- a/lib/ffmpeg/media.rb
+++ b/lib/ffmpeg/media.rb
@@ -77,7 +77,10 @@ def initialize(message, output)
       case format_name
       when /\Adash\b/   then '.mpd'
       when /\bhls\b/    then '.m3u8'
-      when /\bmpegts\b/ then '.ts'
+      when /\bmpegts(raw)?\b/ then '.ts'
+      when /\bmpegvideo\b/ then '.mpg'
+      when /\blive_flv\b/  then '.flv'
+      when /\basf_o\b/     then '.asf'
       when /\b(mov|mp4)\b/
         case major_brand
         when /\Aqt\b/i  then '.mov'
diff --git a/lib/ffmpeg/version.rb b/lib/ffmpeg/version.rb
index 282764d..fe0c61e 100644
--- a/lib/ffmpeg/version.rb
+++ b/lib/ffmpeg/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module FFMPEG
-  VERSION = '8.4.0'
+  VERSION = '8.4.1'
 end