Merge pull request #51 from max619/feature/fluent-api

Added Fluent API to argument builder

Former-commit-id: e241ce9034

FFMpegCore.Test/ArgumentBuilderTest.cs

@@ -1,4 +1,5 @@
 using FFMpegCore.FFMPEG.Argument;
+using FFMpegCore.FFMPEG.Argument.Fluent;
 using FFMpegCore.FFMPEG.Enums;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using System;
@@ -31,6 +32,18 @@ private string GetArgumentsString(params Argument[] args)
             return builder.BuildArguments(container);
         }
 
+        private string GetArgumentsString(ArgumentContainer container)
+        {
+            var resContainer = new ArgumentContainer { new InputArgument("input.mp4") };
+            foreach (var a in container)
+            {
+                resContainer.Add(a.Value);
+            }
+            resContainer.Add(new OutputArgument("output.mp4"));
+
+            return builder.BuildArguments(resContainer);
+        }
+
         [TestMethod]
         public void Builder_BuildString_IO_1()
         {
@@ -47,6 +60,15 @@ public void Builder_BuildString_Scale()
             Assert.AreEqual(str, "-i \"input.mp4\" -vf scale=-1:720 \"output.mp4\"");
         }
 
+
+        [TestMethod]
+        public void Builder_BuildString_Scale_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().Scale(VideoSize.Hd));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -vf scale=-1:720 \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_AudioCodec()
         {
@@ -68,6 +90,14 @@ public void Builder_BuildString_Quiet()
             Assert.AreEqual(str, "-i \"input.mp4\" -hide_banner -loglevel warning \"output.mp4\"");
         }
 
+
+        [TestMethod]
+        public void Builder_BuildString_AudioCodec_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().AudioCodec(AudioCodec.Aac, AudioQuality.Normal));
+            Assert.AreEqual(str, "-i \"input.mp4\" -c:a aac -b:a 128k \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_BitStream()
         {
@@ -76,6 +106,14 @@ public void Builder_BuildString_BitStream()
             Assert.AreEqual(str, "-i \"input.mp4\" -bsf:a h264_mp4toannexb \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_BitStream_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().BitStreamFilter(Channel.Audio, Filter.H264_Mp4ToAnnexB));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -bsf:a h264_mp4toannexb \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Concat()
         {
@@ -86,6 +124,20 @@ public void Builder_BuildString_Concat()
             Assert.AreEqual(str, "-i \"concat:1.mp4|2.mp4|3.mp4|4.mp4\" \"output.mp4\"");
         }
 
+
+        [TestMethod]
+        public void Builder_BuildString_Concat_Fluent()
+        {
+            var container = new ArgumentContainer()
+                .Concat(concatFiles)
+                .Output("output.mp4");
+
+
+            var str = builder.BuildArguments(container);
+
+            Assert.AreEqual(str, "-i \"concat:1.mp4|2.mp4|3.mp4|4.mp4\" \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Copy_Audio()
         {
@@ -94,6 +146,14 @@ public void Builder_BuildString_Copy_Audio()
             Assert.AreEqual(str, "-i \"input.mp4\" -c:a copy \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Copy_Audio_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().Copy(Channel.Audio));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -c:a copy \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Copy_Video()
         {
@@ -102,6 +162,15 @@ public void Builder_BuildString_Copy_Video()
             Assert.AreEqual(str, "-i \"input.mp4\" -c:v copy \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Copy_Video_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().Copy(Channel.Video));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -c:v copy \"output.mp4\"");
+        }
+
+
         [TestMethod]
         public void Builder_BuildString_Copy_Both()
         {
@@ -110,6 +179,14 @@ public void Builder_BuildString_Copy_Both()
             Assert.AreEqual(str, "-i \"input.mp4\" -c copy \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Copy_Both_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().Copy(Channel.Both));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -c copy \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_CpuSpeed()
         {
@@ -118,6 +195,14 @@ public void Builder_BuildString_CpuSpeed()
             Assert.AreEqual(str, "-i \"input.mp4\" -quality good -cpu-used 10 -deadline realtime \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_CpuSpeed_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().CpuSpeed(10));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -quality good -cpu-used 10 -deadline realtime \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_ForceFormat()
         {
@@ -126,6 +211,14 @@ public void Builder_BuildString_ForceFormat()
             Assert.AreEqual(str, "-i \"input.mp4\" -f libx264 \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_ForceFormat_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().ForceFormat(VideoCodec.LibX264));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -f libx264 \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_FrameOutputCount()
         {
@@ -134,6 +227,14 @@ public void Builder_BuildString_FrameOutputCount()
             Assert.AreEqual(str, "-i \"input.mp4\" -vframes 50 \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_FrameOutputCount_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().FrameOutputCount(50));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -vframes 50 \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_FrameRate()
         {
@@ -142,6 +243,14 @@ public void Builder_BuildString_FrameRate()
             Assert.AreEqual(str, "-i \"input.mp4\" -r 50 \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_FrameRate_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().FrameRate(50));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -r 50 \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Loop()
         {
@@ -150,6 +259,14 @@ public void Builder_BuildString_Loop()
             Assert.AreEqual(str, "-i \"input.mp4\" -loop 50 \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Loop_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().Loop(50));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -loop 50 \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Seek()
         {
@@ -158,6 +275,14 @@ public void Builder_BuildString_Seek()
             Assert.AreEqual(str, "-i \"input.mp4\" -ss 00:00:10 \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Seek_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().Seek(TimeSpan.FromSeconds(10)));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -ss 00:00:10 \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Shortest()
         {
@@ -166,6 +291,14 @@ public void Builder_BuildString_Shortest()
             Assert.AreEqual(str, "-i \"input.mp4\" -shortest \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Shortest_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().Shortest());
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -shortest \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Size()
         {
@@ -174,6 +307,14 @@ public void Builder_BuildString_Size()
             Assert.AreEqual(str, "-i \"input.mp4\" -s 1920x1080 \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Size_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().Size(1920, 1080));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -s 1920x1080 \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Speed()
         {
@@ -182,6 +323,14 @@ public void Builder_BuildString_Speed()
             Assert.AreEqual(str, "-i \"input.mp4\" -preset fast \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Speed_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().Speed(Speed.Fast));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -preset fast \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_DrawtextFilter()
         {
@@ -197,6 +346,27 @@ public void Builder_BuildString_DrawtextFilter()
             Assert.AreEqual("-i \"input.mp4\" -vf drawtext=\"text='Stack Overflow': fontfile=/path/to/font.ttf: fontcolor=white: fontsize=24: box=1: boxcolor=black@0.5: boxborderw=5: x=(w-text_w)/2: y=(h-text_h)/2\" \"output.mp4\"", str);
         }
 
+        [TestMethod]
+        public void Builder_BuildString_DrawtextFilter_Fluent()
+        {
+            var container = new ArgumentContainer().
+                DrawText((options) =>
+                {
+                    options.Text = "Stack Overflow";
+                    options.FontPath = "/path/to/font.ttf";
+                    options.AddParam("fontcolor", "white")
+                        .AddParam("fontsize", "24")
+                        .AddParam("box", "1")
+                        .AddParam("boxcolor", "black@0.5")
+                        .AddParam("boxborderw", "5")
+                        .AddParam("x", "(w-text_w)/2")
+                        .AddParam("y", "(h-text_h)/2");
+                });
+            var str = GetArgumentsString(container);
+
+            Assert.AreEqual("-i \"input.mp4\" -vf drawtext=\"text='Stack Overflow': fontfile=/path/to/font.ttf: fontcolor=white: fontsize=24: box=1: boxcolor=black@0.5: boxborderw=5: x=(w-text_w)/2: y=(h-text_h)/2\" \"output.mp4\"", str);
+        }
+
         [TestMethod]
         public void Builder_BuildString_StartNumber()
         {
@@ -205,6 +375,15 @@ public void Builder_BuildString_StartNumber()
             Assert.AreEqual(str, "-i \"input.mp4\" -start_number 50 \"output.mp4\"");
         }
 
+
+        [TestMethod]
+        public void Builder_BuildString_StartNumber_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().StartNumber(50));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -start_number 50 \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Threads_1()
         {
@@ -213,6 +392,14 @@ public void Builder_BuildString_Threads_1()
             Assert.AreEqual(str, "-i \"input.mp4\" -threads 50 \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Threads_1_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().Threads(50));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -threads 50 \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Threads_2()
         {
@@ -221,6 +408,14 @@ public void Builder_BuildString_Threads_2()
             Assert.AreEqual(str, $"-i \"input.mp4\" -threads {Environment.ProcessorCount} \"output.mp4\"");
         }
         
+        [TestMethod]
+        public void Builder_BuildString_Threads_2_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().MultiThreaded());
+
+            Assert.AreEqual(str, $"-i \"input.mp4\" -threads {Environment.ProcessorCount} \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Codec()
         {
@@ -229,6 +424,14 @@ public void Builder_BuildString_Codec()
             Assert.AreEqual(str, "-i \"input.mp4\" -c:v libx264 -pix_fmt yuv420p \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Codec_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().VideoCodec(VideoCodec.LibX264));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -c:v libx264 -pix_fmt yuv420p \"output.mp4\"");
+        }
+
         [TestMethod]
         public void Builder_BuildString_Codec_Override()
         {
@@ -237,6 +440,15 @@ public void Builder_BuildString_Codec_Override()
             Assert.AreEqual(str, "-i \"input.mp4\" -c:v libx264 -pix_fmt yuv420p -y \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Codec_Override_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().VideoCodec(VideoCodec.LibX264).Override());
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -c:v libx264 -pix_fmt yuv420p -y \"output.mp4\"");
+        }
+
+
         [TestMethod]
         public void Builder_BuildString_Duration()
         {
@@ -245,6 +457,14 @@ public void Builder_BuildString_Duration()
             Assert.AreEqual(str, "-i \"input.mp4\" -t 00:00:20 \"output.mp4\"");
         }
 
+        [TestMethod]
+        public void Builder_BuildString_Duration_Fluent()
+        {
+            var str = GetArgumentsString(new ArgumentContainer().Duration(TimeSpan.FromSeconds(20)));
+
+            Assert.AreEqual(str, "-i \"input.mp4\" -t 00:00:20 \"output.mp4\"");
+        }
+        
         [TestMethod]
         public void Builder_BuildString_Raw()
         {

FFMpegCore/FFMPEG/Argument/ArgumentContainerFluentExtensions.cs

@@ -0,0 +1,357 @@
+using FFMpegCore.FFMPEG.Enums;
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.IO;
+using System.Linq;
+using System.Text;
+
+namespace FFMpegCore.FFMPEG.Argument.Fluent
+{
+    public static class ArgumentContainerFluentExtensions
+    {
+        public static ArgumentContainer AudioCodec(this ArgumentContainer container, AudioCodec codec)
+        {
+            container.Add(new AudioCodecArgument(codec));
+            return container;
+        }
+
+        public static ArgumentContainer AudioCodec(this ArgumentContainer container, AudioCodec codec, AudioQuality bitrate)
+        {
+            container.Add(new AudioCodecArgument(codec, bitrate));
+            return container;
+        }
+
+        public static ArgumentContainer AudioCodec(this ArgumentContainer container, AudioCodec codec, int bitrate)
+        {
+            container.Add(new AudioCodecArgument(codec, bitrate));
+            return container;
+        }
+
+        public static ArgumentContainer AudioSamplingRate(this ArgumentContainer container)
+        {
+            container.Add(new AudioSamplingRateArgument());
+            return container;
+        }
+
+        public static ArgumentContainer AudioSamplingRate(this ArgumentContainer container, int sampleRate)
+        {
+            container.Add(new AudioSamplingRateArgument(sampleRate));
+            return container;
+        }
+
+        public static ArgumentContainer BitStreamFilter(this ArgumentContainer container, Channel first, Filter second)
+        {
+            container.Add(new BitStreamFilterArgument(first, second));
+            return container;
+        }
+
+        public static ArgumentContainer Concat(this ArgumentContainer container, IEnumerable<string> paths)
+        {
+            container.Add(new ConcatArgument(paths));
+            return container;
+        }
+
+        public static ArgumentContainer ConstantRateFactor(this ArgumentContainer container, int crf)
+        {
+            container.Add(new ConstantRateFactorArgument(crf));
+            return container;
+        }
+
+        public static ArgumentContainer Copy(this ArgumentContainer container)
+        {
+            container.Add(new CopyArgument());
+            return container;
+        }
+
+        public static ArgumentContainer Copy(this ArgumentContainer container, Channel value)
+        {
+            container.Add(new CopyArgument(value));
+            return container;
+        }
+
+        public static ArgumentContainer CpuSpeed(this ArgumentContainer container, int value)
+        {
+            container.Add(new CpuSpeedArgument(value));
+            return container;
+        }
+
+        public static ArgumentContainer DisableChannel(this ArgumentContainer container, Channel channel)
+        {
+            container.Add(new DisableChannelArgument(channel));
+            return container;
+        }
+
+        public class DrawTextOptions
+        {
+            public string Text { get; set; }
+            public string FontPath { get; set; }
+            public List<(string, string)> Params { get; private set; }
+
+            public DrawTextOptions()
+            {
+                Params = new List<(string, string)>();
+            }
+
+            public DrawTextOptions AddParam(string key, string value)
+            {
+                Params.Add((key, value));
+                return this;
+            }
+        }
+
+        public static ArgumentContainer DrawText(this ArgumentContainer container, Action<DrawTextOptions> builder)
+        {
+            var argumentParams = new DrawTextOptions();
+            builder.Invoke(argumentParams);
+            container.Add(new DrawTextArgument(argumentParams.Text, argumentParams.FontPath, argumentParams.Params.ToArray()));
+            return container;
+        }
+
+        public static ArgumentContainer DrawText(this ArgumentContainer container, string text, string fontPath, params (string, string)[] optionalArguments)
+        {
+            container.Add(new DrawTextArgument(text, fontPath, optionalArguments));
+            return container;
+        }
+
+        public static ArgumentContainer Duration(this ArgumentContainer container, TimeSpan? duration)
+        {
+            container.Add(new DurationArgument(duration));
+            return container;
+        }
+
+        public static ArgumentContainer FastStart(this ArgumentContainer container)
+        {
+            container.Add(new FaststartArgument());
+            return container;
+        }
+
+        public static ArgumentContainer ForceFormat(this ArgumentContainer container, VideoCodec codec)
+        {
+            container.Add(new ForceFormatArgument(codec));
+            return container;
+        }
+
+        public static ArgumentContainer FrameOutputCount(this ArgumentContainer container, int count)
+        {
+            container.Add(new FrameOutputCountArgument(count));
+            return container;
+        }
+
+        public static ArgumentContainer FrameRate(this ArgumentContainer container, double framerate)
+        {
+            container.Add(new FrameRateArgument(framerate));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, string path)
+        {
+            container.Add(new InputArgument(path));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, IEnumerable<string> paths)
+        {
+            container.Add(new InputArgument(paths.ToArray()));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, params string[] paths)
+        {
+            container.Add(new InputArgument(paths));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, VideoInfo path)
+        {
+            container.Add(new InputArgument(path));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, IEnumerable<VideoInfo> paths)
+        {
+            container.Add(new InputArgument(paths.ToArray()));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, params VideoInfo[] paths)
+        {
+            container.Add(new InputArgument(paths));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, FileInfo path)
+        {
+            container.Add(new InputArgument(path));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, IEnumerable<FileInfo> paths)
+        {
+            container.Add(new InputArgument(paths.ToArray()));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, params FileInfo[] paths)
+        {
+            container.Add(new InputArgument(paths));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, Uri uri)
+        {
+            container.Add(new InputArgument(uri));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, IEnumerable<Uri> uris)
+        {
+            container.Add(new InputArgument(uris.ToArray()));
+            return container;
+        }
+
+        public static ArgumentContainer Input(this ArgumentContainer container, params Uri[] uris)
+        {
+            container.Add(new InputArgument(uris));
+            return container;
+        }
+
+        public static ArgumentContainer Loop(this ArgumentContainer container, int times)
+        {
+            container.Add(new LoopArgument(times));
+            return container;
+        }
+
+        public static ArgumentContainer Output(this ArgumentContainer container, string path)
+        {
+            container.Add(new OutputArgument(path));
+            return container;
+        }
+
+        public static ArgumentContainer Output(this ArgumentContainer container, VideoInfo path)
+        {
+            container.Add(new OutputArgument(path));
+            return container;
+        }
+
+        public static ArgumentContainer Output(this ArgumentContainer container, FileInfo path)
+        {
+            container.Add(new OutputArgument(path));
+            return container;
+        }
+
+        public static ArgumentContainer Output(this ArgumentContainer container, Uri path)
+        {
+            container.Add(new OutputArgument(path));
+            return container;
+        }
+
+        public static ArgumentContainer Override(this ArgumentContainer container)
+        {
+            container.Add(new OverrideArgument());
+            return container;
+        }
+
+        public static ArgumentContainer RemoveMetadata(this ArgumentContainer container)
+        {
+            container.Add(new RemoveMetadataArgument());
+            return container;
+        }
+
+        public static ArgumentContainer Scale(this ArgumentContainer container, Size value)
+        {
+            container.Add(new ScaleArgument(value));
+            return container;
+        }
+
+        public static ArgumentContainer Scale(this ArgumentContainer container, VideoSize value)
+        {
+            container.Add(new ScaleArgument(value));
+            return container;
+        }
+
+        public static ArgumentContainer Scale(this ArgumentContainer container, int width, int height)
+        {
+            container.Add(new ScaleArgument(width, height));
+            return container;
+        }
+
+        public static ArgumentContainer Seek(this ArgumentContainer container, TimeSpan? value)
+        {
+            container.Add(new SeekArgument(value));
+            return container;
+        }
+
+        public static ArgumentContainer Shortest(this ArgumentContainer container)
+        {
+            container.Add(new ShortestArgument(true));
+            return container;
+        }
+        
+        public static ArgumentContainer Size(this ArgumentContainer container, Size value)
+        {
+            container.Add(new SizeArgument(value));
+            return container;
+        }
+
+        public static ArgumentContainer Size(this ArgumentContainer container, VideoSize value)
+        {
+            container.Add(new SizeArgument(value));
+            return container;
+        }
+
+        public static ArgumentContainer Size(this ArgumentContainer container, int width, int height)
+        {
+            container.Add(new SizeArgument(width, height));
+            return container;
+        }
+
+        public static ArgumentContainer Speed(this ArgumentContainer container, Speed value)
+        {
+            container.Add(new SpeedArgument(value));
+            return container;
+        }
+
+        public static ArgumentContainer StartNumber(this ArgumentContainer container, int value)
+        {
+            container.Add(new StartNumberArgument(value));
+            return container;
+        }
+
+        public static ArgumentContainer Threads(this ArgumentContainer container, int value)
+        {
+            container.Add(new ThreadsArgument(value));
+            return container;
+        }
+
+        public static ArgumentContainer MultiThreaded(this ArgumentContainer container)
+        {
+            container.Add(new ThreadsArgument(true));
+            return container;
+        }
+
+        public static ArgumentContainer Transpose(this ArgumentContainer container, int transpose)
+        {
+            container.Add(new TransposeArgument(transpose));
+            return container;
+        }
+
+        public static ArgumentContainer VariableBitRate(this ArgumentContainer container, int vbr)
+        {
+            container.Add(new VariableBitRateArgument(vbr));
+            return container;
+        }
+
+        public static ArgumentContainer VideoCodec(this ArgumentContainer container, VideoCodec codec)
+        {
+            container.Add(new VideoCodecArgument(codec));
+            return container;
+        }
+
+        public static ArgumentContainer VideoCodec(this ArgumentContainer container, VideoCodec codec, int bitrate)
+        {
+            container.Add(new VideoCodecArgument(codec, bitrate));
+            return container;
+        }
+    }
+}

README.md

@@ -363,7 +363,16 @@ Custom video converting presets could be created with help of `ArgumentContainer
 var container = new ArgumentContainer();
 container.Add(new VideoCodecArgument(VideoCodec.LibX264));
 container.Add(new ScaleArgument(VideoSize.Hd));
+```
+or use Fluent API
 
+```csharp
+var container = new ArgumentContainer()
+                .VideoCodec(VideoCodec.LibX264)
+                .Scale(VideoSize.Hd);
+```
+
+```csharp
 var ffmpeg = new FFMpeg();
 var result = ffmpeg.Convert(container, new FileInfo("input.mp4"), new FileInfo("output.mp4"));
 ```