diff --git a/src/FFMpeg/Coordinate/Dimension.php b/src/FFMpeg/Coordinate/Dimension.php
index 018d4ed..33ebaea 100644
--- a/src/FFMpeg/Coordinate/Dimension.php
+++ b/src/FFMpeg/Coordinate/Dimension.php
@@ -40,7 +40,7 @@ class Dimension
     /**
      * Returns width.
      *
-     * @return width
+     * @return integer
      */
     public function getWidth()
     {
diff --git a/src/FFMpeg/FFMpegServiceProvider.php b/src/FFMpeg/FFMpegServiceProvider.php
index 4bb489b..6aa9735 100644
--- a/src/FFMpeg/FFMpegServiceProvider.php
+++ b/src/FFMpeg/FFMpegServiceProvider.php
@@ -12,8 +12,6 @@
 namespace FFMpeg;
 
 use Doctrine\Common\Cache\ArrayCache;
-use FFMpeg\FFMpeg;
-use FFMpeg\FFProbe;
 use Silex\Application;
 use Silex\ServiceProviderInterface;
 
diff --git a/src/FFMpeg/Filters/Audio/AudioFilters.php b/src/FFMpeg/Filters/Audio/AudioFilters.php
index ddce8f1..fe328c5 100644
--- a/src/FFMpeg/Filters/Audio/AudioFilters.php
+++ b/src/FFMpeg/Filters/Audio/AudioFilters.php
@@ -3,7 +3,6 @@
 namespace FFMpeg\Filters\Audio;
 
 use FFMpeg\Media\Audio;
-use FFMpeg\Filters\Audio\AudioResamplableFilter;
 
 class AudioFilters
 {
diff --git a/src/FFMpeg/Filters/Video/CustomFilter.php b/src/FFMpeg/Filters/Video/CustomFilter.php
new file mode 100644
index 0000000..eb75079
--- /dev/null
+++ b/src/FFMpeg/Filters/Video/CustomFilter.php
@@ -0,0 +1,52 @@
+<?php
+
+/*
+ * This file is part of PHP-FFmpeg.
+ *
+ * (c) Alchemy <dev.team@alchemy.fr>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace FFMpeg\Filters\Video;
+
+use FFMpeg\Format\VideoInterface;
+use FFMpeg\Media\Video;
+
+class CustomFilter implements VideoFilterInterface
+{
+    /** @var string */
+    private $filter;
+    /** @var integer */
+    private $priority;
+
+    /**
+     * A custom filter, useful if you want to build complex filters
+     *
+     * @param string $filter
+     * @param int    $priority
+     */
+    public function __construct($filter, $priority = 0)
+    {
+        $this->filter = $filter;
+        $this->priority = $priority;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return $this->priority;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function apply(Video $video, VideoInterface $format)
+    {
+        $commands = array('-vf', $this->filter);
+
+        return $commands;
+    }
+}
diff --git a/src/FFMpeg/Filters/Video/VideoFilters.php b/src/FFMpeg/Filters/Video/VideoFilters.php
index 30b4b2a..55281e4 100644
--- a/src/FFMpeg/Filters/Video/VideoFilters.php
+++ b/src/FFMpeg/Filters/Video/VideoFilters.php
@@ -12,6 +12,7 @@
 namespace FFMpeg\Filters\Video;
 
 use FFMpeg\Media\Video;
+use FFMpeg\Coordinate\TimeCode;
 use FFMpeg\Coordinate\Dimension;
 use FFMpeg\Coordinate\FrameRate;
 use FFMpeg\Filters\Audio\AudioResamplableFilter;
@@ -102,4 +103,17 @@ class VideoFilters extends AudioFilters
 
         return $this;
     }
+
+    /**
+     * @param string $imagePath
+     * @param array  $coordinates
+     *
+     * @return $this
+     */
+    public function watermark($imagePath, array $coordinates = array())
+    {
+        $this->media->addFilter(new WatermarkFilter($imagePath, $coordinates));
+
+        return $this;
+    }
 }
diff --git a/src/FFMpeg/Filters/Video/WatermarkFilter.php b/src/FFMpeg/Filters/Video/WatermarkFilter.php
new file mode 100644
index 0000000..40bb8fc
--- /dev/null
+++ b/src/FFMpeg/Filters/Video/WatermarkFilter.php
@@ -0,0 +1,75 @@
+<?php
+
+/*
+ * This file is part of PHP-FFmpeg.
+ *
+ * (c) Alchemy <dev.team@alchemy.fr>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace FFMpeg\Filters\Video;
+
+use FFMpeg\Format\VideoInterface;
+use FFMpeg\Media\Video;
+
+class WatermarkFilter implements VideoFilterInterface
+{
+    /** @var string */
+    private $watermarkPath;
+    /** @var array */
+    private $coordinates;
+    /** @var integer */
+    private $priority;
+
+    public function __construct($watermarkPath, array $coordinates = array(), $priority = 0)
+    {
+        $this->watermarkPath = $watermarkPath;
+        $this->coordinates = $coordinates;
+        $this->priority = $priority;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return $this->priority;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function apply(Video $video, VideoInterface $format)
+    {
+        $position = isset($this->coordinates['position']) ? $this->coordinates['position'] : 'absolute';
+
+        switch ($position) {
+            case 'relative':
+                if (isset($this->coordinates['top'])) {
+                    $y = $this->coordinates['top'];
+                } elseif (isset($this->coordinates['bottom'])) {
+                    $y = sprintf('main_h - %d - overlay_h', $this->coordinates['bottom']);
+                } else {
+                    $y = 0;
+                }
+
+                if (isset($this->coordinates['left'])) {
+                    $x = $this->coordinates['left'];
+                } elseif (isset($this->coordinates['right'])) {
+                    $x = sprintf('main_w - %d - overlay_w', $this->coordinates['right']);
+                } else {
+                    $x = 0;
+                }
+
+                break;
+            default:
+                $x = isset($this->coordinates['x']) ? $this->coordinates['x'] : 0;
+                $y = isset($this->coordinates['y']) ? $this->coordinates['y'] : 0;
+                break;
+        }
+
+        return array('-vf', sprintf('overlay %s:%s', $x, $y));
+    }
+}
diff --git a/src/FFMpeg/Format/Video/X264.php b/src/FFMpeg/Format/Video/X264.php
index 40010fd..80e4b67 100644
--- a/src/FFMpeg/Format/Video/X264.php
+++ b/src/FFMpeg/Format/Video/X264.php
@@ -16,6 +16,9 @@ namespace FFMpeg\Format\Video;
  */
 class X264 extends DefaultVideo
 {
+    /** @var boolean */
+    private $bframesSupport = true;
+
     public function __construct($audioCodec = 'libfaac', $videoCodec = 'libx264')
     {
         $this
@@ -28,7 +31,19 @@ class X264 extends DefaultVideo
      */
     public function supportBFrames()
     {
-        return true;
+        return $this->bframesSupport;
+    }
+
+    /**
+     * @param $support
+     *
+     * @return X264
+     */
+    public function setBFramesSupport($support)
+    {
+        $this->bframesSupport = $support;
+
+        return $this;
     }
 
     /**
@@ -55,6 +70,9 @@ class X264 extends DefaultVideo
         return 2;
     }
 
+    /**
+     * @return int
+     */
     public function getModulus()
     {
         return 2;
diff --git a/src/FFMpeg/Media/AbstractMediaType.php b/src/FFMpeg/Media/AbstractMediaType.php
index 45bb0c6..5523c0b 100644
--- a/src/FFMpeg/Media/AbstractMediaType.php
+++ b/src/FFMpeg/Media/AbstractMediaType.php
@@ -14,7 +14,6 @@ namespace FFMpeg\Media;
 use FFMpeg\Driver\FFMpegDriver;
 use FFMpeg\FFProbe;
 use FFMpeg\Filters\FiltersCollection;
-use FFMpeg\Media\MediaTypeInterface;
 
 abstract class AbstractMediaType implements MediaTypeInterface
 {
diff --git a/src/FFMpeg/Media/Frame.php b/src/FFMpeg/Media/Frame.php
index b50e549..7b08eb3 100644
--- a/src/FFMpeg/Media/Frame.php
+++ b/src/FFMpeg/Media/Frame.php
@@ -18,7 +18,6 @@ use FFMpeg\Driver\FFMpegDriver;
 use FFMpeg\FFProbe;
 use FFMpeg\Exception\RuntimeException;
 use FFMpeg\Coordinate\TimeCode;
-use FFMpeg\Media\Video;
 
 class Frame extends AbstractMediaType
 {
diff --git a/src/FFMpeg/Media/Video.php b/src/FFMpeg/Media/Video.php
index ae2996f..f802f5b 100644
--- a/src/FFMpeg/Media/Video.php
+++ b/src/FFMpeg/Media/Video.php
@@ -22,7 +22,6 @@ use FFMpeg\Format\FormatInterface;
 use FFMpeg\Format\ProgressableInterface;
 use FFMpeg\Format\AudioInterface;
 use FFMpeg\Format\VideoInterface;
-use FFMpeg\Media\Frame;
 use Neutron\TemporaryFilesystem\Manager as FsManager;
 
 class Video extends Audio
@@ -69,12 +68,12 @@ class Video extends Audio
         if ($this->driver->getConfiguration()->has('ffmpeg.threads')) {
             $filters->add(new SimpleFilter(array('-threads', $this->driver->getConfiguration()->get('ffmpeg.threads'))));
         }
-        if ($format instanceOf VideoInterface) {
+        if ($format instanceof VideoInterface) {
             if (null !== $format->getVideoCodec()) {
                 $filters->add(new SimpleFilter(array('-vcodec', $format->getVideoCodec())));
             }
         }
-        if ($format instanceOf AudioInterface) {
+        if ($format instanceof AudioInterface) {
             if (null !== $format->getAudioCodec()) {
                 $filters->add(new SimpleFilter(array('-acodec', $format->getAudioCodec())));
             }
@@ -84,7 +83,7 @@ class Video extends Audio
             $commands = array_merge($commands, $filter->apply($this, $format));
         }
 
-        if ($format instanceOf VideoInterface) {
+        if ($format instanceof VideoInterface) {
             $commands[] = '-b:v';
             $commands[] = $format->getKiloBitrate() . 'k';
             $commands[] = '-refs';
@@ -109,7 +108,7 @@ class Video extends Audio
             $commands[] = '1';
         }
 
-        if ($format instanceOf AudioInterface) {
+        if ($format instanceof AudioInterface) {
             if (null !== $format->getAudioKiloBitrate()) {
                 $commands[] = '-b:a';
                 $commands[] = $format->getAudioKiloBitrate() . 'k';
diff --git a/tests/FFMpeg/Tests/Filters/Video/CustomFilterTest.php b/tests/FFMpeg/Tests/Filters/Video/CustomFilterTest.php
new file mode 100644
index 0000000..ff8ad75
--- /dev/null
+++ b/tests/FFMpeg/Tests/Filters/Video/CustomFilterTest.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace FFMpeg\Tests\Filters\Video;
+
+use FFMpeg\Filters\Video\CustomFilter;
+use FFMpeg\Filters\Video\FrameRateFilter;
+use FFMpeg\Tests\TestCase;
+use FFMpeg\Coordinate\FrameRate;
+
+class CustomFilterTest extends TestCase
+{
+    public function testApplyCustomFilter()
+    {
+        $video = $this->getVideoMock();
+        $format = $this->getMock('FFMpeg\Format\VideoInterface');
+
+        $filter = new CustomFilter('whatever i put would end up as a filter');
+        $this->assertEquals(array('-vf', 'whatever i put would end up as a filter'), $filter->apply($video, $format));
+    }
+}
diff --git a/tests/FFMpeg/Tests/Filters/Video/WatermarkFilterTest.php b/tests/FFMpeg/Tests/Filters/Video/WatermarkFilterTest.php
new file mode 100644
index 0000000..82fb3e1
--- /dev/null
+++ b/tests/FFMpeg/Tests/Filters/Video/WatermarkFilterTest.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace FFMpeg\Tests\Filters\Video;
+
+use FFMpeg\FFProbe\DataMapping\Stream;
+use FFMpeg\FFProbe\DataMapping\StreamCollection;
+use FFMpeg\Filters\Video\RotateFilter;
+use FFMpeg\Filters\Video\WatermarkFilter;
+use FFMpeg\Tests\TestCase;
+
+class WatermarkFilterTest extends TestCase
+{
+    public function testApplyWatermark()
+    {
+        $stream = new Stream(array('width' => 320, 'height' => 240, 'codec_type' => 'video'));
+        $streams = new StreamCollection(array($stream));
+
+        $video = $this->getVideoMock();
+
+        $format = $this->getMock('FFMpeg\Format\VideoInterface');
+
+        $filter = new WatermarkFilter(__DIR__ . '/../../files/watermark.png');
+        $this->assertEquals(array('-vf', 'overlay 0:0'), $filter->apply($video, $format));
+
+        // check size of video is unchanged
+        $this->assertEquals(320, $stream->get('width'));
+        $this->assertEquals(240, $stream->get('height'));
+    }
+
+    public function testDifferentCoordinaates()
+    {
+        $video = $this->getVideoMock();
+        $format = $this->getMock('FFMpeg\Format\VideoInterface');
+
+        // test position absolute
+        $filter = new WatermarkFilter(__DIR__ . '/../../files/watermark.png', array(
+            'position' => 'absolute',
+            'x' => 10, 'y' => 5
+        ));
+        $this->assertEquals(array('-vf', 'overlay 10:5'), $filter->apply($video, $format));
+
+        // test position relative
+        $filter = new WatermarkFilter(__DIR__ . '/../../files/watermark.png', array(
+            'position' => 'relative',
+            'bottom' => 10, 'left' => 5
+        ));
+        $this->assertEquals(array('-vf', 'overlay 5:main_h - 10 - overlay_h'), $filter->apply($video, $format));
+
+        // test position relative
+        $filter = new WatermarkFilter(__DIR__ . '/../../files/watermark.png', array(
+            'position' => 'relative',
+            'bottom' => 5, 'right' => 4
+        ));
+        $this->assertEquals(array('-vf', 'overlay main_w - 4 - overlay_w:main_h - 5 - overlay_h'), $filter->apply($video, $format));
+
+        // test position relative
+        $filter = new WatermarkFilter(__DIR__ . '/../../files/watermark.png', array(
+            'position' => 'relative',
+            'left' => 5, 'top' => 11
+        ));
+        $this->assertEquals(array('-vf', 'overlay 5:11'), $filter->apply($video, $format));
+    }
+}
diff --git a/tests/files/waternark.png b/tests/files/waternark.png
new file mode 100644
index 0000000..0c96e54
Binary files /dev/null and b/tests/files/waternark.png differ