diff --git a/.gitignore b/.gitignore
index 2b7fb77..7d052cb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-/nbproject/
+#/nbproject/
 /vendor/
 /docs/build
 composer.phar
diff --git a/src/FFMpeg/Filters/Audio/AddMetadataFilter.php b/src/FFMpeg/Filters/Audio/AddMetadataFilter.php
index aa1207b..1fc88e1 100644
--- a/src/FFMpeg/Filters/Audio/AddMetadataFilter.php
+++ b/src/FFMpeg/Filters/Audio/AddMetadataFilter.php
@@ -12,9 +12,9 @@ class AddMetadataFilter implements AudioFilterInterface
 	/** @var Integer */
 	private $priority;
 
-	function __construct($data = null, $priority = 9)
+	function __construct($metaArr = null, $priority = 9)
 	{
-		$this->metaArr = $data;
+		$this->metaArr = $metaArr;
 		$this->priority = $priority;
 	}
 
diff --git a/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php b/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php
index 18b8225..44372f6 100644
--- a/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php
+++ b/src/FFMpeg/Filters/Video/ExtractMultipleFramesFilter.php
@@ -11,8 +11,8 @@
 
 namespace FFMpeg\Filters\Video;
 
-use FFMpeg\FFProbe;
 use FFMpeg\Exception\InvalidArgumentException;
+use FFMpeg\Exception\RuntimeException;
 use FFMpeg\Media\Video;
 use FFMpeg\Format\VideoInterface;
 
diff --git a/src/FFMpeg/Filters/Video/PadFilter.php b/src/FFMpeg/Filters/Video/PadFilter.php
index df19a2d..a6dcf2d 100644
--- a/src/FFMpeg/Filters/Video/PadFilter.php
+++ b/src/FFMpeg/Filters/Video/PadFilter.php
@@ -12,7 +12,6 @@
 namespace FFMpeg\Filters\Video;
 
 use FFMpeg\Coordinate\Dimension;
-use FFMpeg\Exception\RuntimeException;
 use FFMpeg\Media\Video;
 use FFMpeg\Format\VideoInterface;
 
diff --git a/src/FFMpeg/Filters/Waveform/WaveformDownmixFilter.php b/src/FFMpeg/Filters/Waveform/WaveformDownmixFilter.php
index 7cafd8f..367e947 100644
--- a/src/FFMpeg/Filters/Waveform/WaveformDownmixFilter.php
+++ b/src/FFMpeg/Filters/Waveform/WaveformDownmixFilter.php
@@ -50,7 +50,6 @@ class WaveformDownmixFilter implements WaveformFilterInterface
      */
     public function apply(Waveform $waveform)
     {
-        $dimensions = null;
         $commands = array();
 
         foreach ($waveform->getAudio()->getStreams() as $stream) {
diff --git a/src/FFMpeg/Media/Waveform.php b/src/FFMpeg/Media/Waveform.php
index 1794890..0954c00 100644
--- a/src/FFMpeg/Media/Waveform.php
+++ b/src/FFMpeg/Media/Waveform.php
@@ -17,7 +17,6 @@ use FFMpeg\Filters\Waveform\WaveformFilters;
 use FFMpeg\Driver\FFMpegDriver;
 use FFMpeg\FFProbe;
 use FFMpeg\Exception\RuntimeException;
-use FFMpeg\Coordinate\TimeCode;
 
 class Waveform extends AbstractMediaType
 {