From edf87d9cb1d138f62419608be38df9f87c199d5f Mon Sep 17 00:00:00 2001
From: Romain Biard <romain.biard@gmail.com>
Date: Wed, 12 Apr 2017 13:15:13 -0300
Subject: [PATCH] Set a default duration to 0 to fix issue 333 (#334)

---
 src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php b/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php
index 44372f6..d0ed54f 100644
--- a/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php
+++ b/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php
@@ -79,6 +79,7 @@ class ExtractMultipleFramesFilter implements VideoFilterInterface
     public function apply(Video $video, VideoInterface $format)
     {
         $commands = array();
+        $duration = 0;
 
         try {
             // Get the duration of the video
@@ -105,7 +106,7 @@ class ExtractMultipleFramesFilter implements VideoFilterInterface
 
             // Set the number of digits to use in the exported filenames
             $nbImages = ceil( $duration * $nbFramesPerSecond );
-            
+
             if($nbImages < 100)
                 $nbDigitsInFileNames = "02";
             elseif($nbImages < 1000)