diff --git a/src/FFMpeg/Filters/Video/ResizeFilter.php b/src/FFMpeg/Filters/Video/ResizeFilter.php
index e483b0c..a3e407d 100644
--- a/src/FFMpeg/Filters/Video/ResizeFilter.php
+++ b/src/FFMpeg/Filters/Video/ResizeFilter.php
@@ -17,9 +17,13 @@ use FFMpeg\Format\VideoInterface;
 
 class ResizeFilter implements VideoFilterInterface
 {
+    /** fits to the dimensions, might introduce anamorphosis */
     const RESIZEMODE_FIT = 'fit';
+    /** resizes the video inside the given dimension, no anamorphosis */
     const RESIZEMODE_INSET = 'inset';
+    /** resizes the video to fit the dimension width, no anamorphosis */
     const RESIZEMODE_SCALE_WIDTH = 'width';
+    /** resizes the video to fit the dimension height, no anamorphosis */
     const RESIZEMODE_SCALE_HEIGHT = 'height';
 
     /** @var Dimension */