Fixes, renames and missing stuff

FFMpegCore.Test/ArgumentBuilderTest.cs

@@ -192,6 +192,17 @@ public void Builder_BuildString_Transpose()
             Assert.AreEqual("-i \"input.mp4\" -vf \"transpose=2\" \"output.mp4\"", str);
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Mirroring()
+        {
+            var str = FFMpegArguments.FromFileInput("input.mp4")
+                .OutputToFile("output.mp4", false, opt => opt
+                    .WithVideoFilters(filterOptions => filterOptions
+                        .Mirror(Mirroring.Horizontal)))
+                .Arguments;
+            Assert.AreEqual("-i \"input.mp4\" -vf \"hflip\" \"output.mp4\"", str);
+        }
+
         [TestMethod]
         public void Builder_BuildString_TransposeScale()
         {

FFMpegCore/FFMpeg/Arguments/SetMirrorVideo.cs

@@ -1,36 +0,0 @@
-using FFMpegCore.Enums;
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace FFMpegCore.Arguments
-{
-    public class SetMirrorVideo : IVideoFilterArgument
-    {
-        public SetMirrorVideo(Mirror value)
-        {
-            _value = value;
-        }
-
-        public Mirror _value { get; set; }
-
-        public string Key => string.Empty;
-
-        public string Value
-        {
-            get
-            {
-                switch (_value)
-                {
-                    case Mirror.Horizontal:
-                        return "hflip";
-                    case Mirror.Vertical:
-                        return "vflip";
-                    default:
-                        throw new ArgumentOutOfRangeException("SetMirrorVideo: argument not found");
-                }
-
-            }
-        }
-    }
-}

FFMpegCore/FFMpeg/Arguments/SetMirroringArgument.cs

@@ -0,0 +1,32 @@
+using FFMpegCore.Enums;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace FFMpegCore.Arguments
+{
+    public class SetMirroringArgument : IVideoFilterArgument
+    {
+        public SetMirroringArgument(Mirroring mirroring)
+        {
+            Mirroring = mirroring;
+        }
+
+        public Mirroring Mirroring { get; set; }
+
+        public string Key => string.Empty;
+
+        public string Value
+        {
+            get
+            {
+                return Mirroring switch
+                {
+                    Mirroring.Horizontal => "hflip",
+                    Mirroring.Vertical => "vflip",
+                    _ => throw new ArgumentOutOfRangeException(nameof(Mirroring))
+                };
+            }
+        }
+    }
+}

FFMpegCore/FFMpeg/Arguments/VideoFiltersArgument.cs

@@ -17,12 +17,20 @@ public VideoFiltersArgument(VideoFilterOptions options)
 
         public string Text => GetText();
 
-        public string GetText()
+        private string GetText()
         {
             if (!Options.Arguments.Any())
                 throw new FFMpegArgumentException("No video-filter arguments provided");
 
-            return $"-vf \"{string.Join(", ", Options.Arguments.Where(arg => !string.IsNullOrEmpty(arg.Value)).Select(arg => $"{arg.Key}={arg.Value.Replace(",", "\\,")}"))}\"";
+            var arguments = Options.Arguments
+                .Where(arg => !string.IsNullOrEmpty(arg.Value))
+                .Select(arg =>
+                {
+                    var escapedValue = arg.Value.Replace(",", "\\,");
+                    return string.IsNullOrEmpty(arg.Key) ? escapedValue : $"{arg.Key}={escapedValue}";
+                });
+
+            return $"-vf \"{string.Join(", ", arguments)}\"";
         }
     }
 
@@ -40,6 +48,7 @@ public class VideoFilterOptions
         public VideoFilterOptions Scale(int width, int height) => WithArgument(new ScaleArgument(width, height));
         public VideoFilterOptions Scale(Size size) => WithArgument(new ScaleArgument(size));
         public VideoFilterOptions Transpose(Transposition transposition) => WithArgument(new TransposeArgument(transposition));
+        public VideoFilterOptions Mirror(Mirroring mirroring) => WithArgument(new SetMirroringArgument(mirroring));
         public VideoFilterOptions DrawText(DrawTextOptions drawTextOptions) => WithArgument(new DrawTextArgument(drawTextOptions));
 
         private VideoFilterOptions WithArgument(IVideoFilterArgument argument)

FFMpegCore/FFMpeg/Enums/Mirroring.cs

@@ -1,6 +1,6 @@
 namespace FFMpegCore.Enums
 {
-    public enum Mirror
+    public enum Mirroring
     {
         Vertical,
         Horizontal