From 98ea16f21b3e85f68bf47b43d9a08c347dd4a1ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=A1bor=20T=C3=B3th?= <me@tothgabor.hu>
Date: Tue, 11 Dec 2012 16:15:14 +0100
Subject: [PATCH] More precise progress indication

This fix solves divison by 0 and incorrect percentage report when extractImage is used
---
 src/FFMpeg/Helper/ProgressHelper.php | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/FFMpeg/Helper/ProgressHelper.php b/src/FFMpeg/Helper/ProgressHelper.php
index 26aa59b..85e47e6 100644
--- a/src/FFMpeg/Helper/ProgressHelper.php
+++ b/src/FFMpeg/Helper/ProgressHelper.php
@@ -152,15 +152,20 @@ abstract class ProgressHelper implements HelperInterface
         $currentDuration = $this->convertDuration($matches[2]);
         $currentTime = $this->microtimeFloat();
         $currentSize = trim(str_replace('kb', '', strtolower(($matches[1]))));
-        $percent = $currentDuration/ $this->duration;
+        $percent = max(0, min(1, $currentDuration / $this->duration));
 
         if ($this->lastOutput !== null) {
             $delta = $currentTime - $this->lastOutput;
             $deltaSize = $currentSize - $this->currentSize;
             $rate = $deltaSize * $delta;
-            $totalDuration = $this->totalSize / $rate;
-            $this->remaining = floor($totalDuration - ($totalDuration * $percent));
-            $this->rate = floor($rate);
+            if ($rate > 0) {
+                $totalDuration = $this->totalSize / $rate;
+                $this->remaining = floor($totalDuration - ($totalDuration * $percent));
+                $this->rate = floor($rate);
+            } else {
+                $this->remaining = 0;
+                $this->rate = 0;
+            }
         }
 
         $this->percent = floor($percent * 100);