From 1c5f9ec9ae704823f9a82c561944fee53cd401d3 Mon Sep 17 00:00:00 2001
From: Luke Childs <lukechilds123@gmail.com>
Date: Sun, 3 Jul 2016 23:10:40 +0100
Subject: [PATCH] Make output file optional

---
 gifgen | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gifgen b/gifgen
index fccd27d..efb1741 100755
--- a/gifgen
+++ b/gifgen
@@ -20,6 +20,10 @@ while getopts "i:o:f:" opt; do
   esac
 done
 
+# Set output filename if not specified
+input_filename=${input##*/}
+output=${input_filename%.*}.gif
+
 # Encode GIF
 ffmpeg -v warning -i $input -vf "fps=$fps,palettegen" -y $palette
 ffmpeg -v warning -i $input -i $palette -lavfi "fps=$fps [x]; [x][1:v] paletteuse" -y $output