diff --git a/FFMpegCore.Test/ArgumentBuilderTest.cs b/FFMpegCore.Test/ArgumentBuilderTest.cs
index 54620a5..9cf7e39 100644
--- a/FFMpegCore.Test/ArgumentBuilderTest.cs
+++ b/FFMpegCore.Test/ArgumentBuilderTest.cs
@@ -334,7 +334,7 @@ public void Builder_BuildString_SubtitleHardBurnFilter()
                         .HardBurnSubtitle(SubtitleHardBurnOptions
                             .Create(subtitlePath: "sample.srt")
                             .SetCharacterEncoding("UTF-8")
-                            .SetOriginalSize(1366,768)
+                            .SetOriginalSize(1366, 768)
                             .SetSubtitleIndex(0)
                             .WithStyle(StyleOptions.Create()
                                 .WithParameter("FontName", "DejaVu Serif")
@@ -479,10 +479,21 @@ public void Builder_BuildString_DynamicAudioNormalizerWithValuesFormat()
         {
             var str = FFMpegArguments.FromFileInput("input.mp4")
                 .OutputToFile("output.mp4", false,
-                    opt => opt.WithAudioFilters(filterOptions => filterOptions.DynamicNormalizer(125, 13, 0.9215, 5.124, 0.5458,false,true,true, 0.3333333)))
+                    opt => opt.WithAudioFilters(filterOptions => filterOptions.DynamicNormalizer(125, 13, 0.9215, 5.124, 0.5458, false, true, true, 0.3333333)))
                 .Arguments;
 
             Assert.AreEqual("-i \"input.mp4\" -af \"dynaudnorm=f=125:g=13:p=0.92:m=5.1:r=0.5:n=0:c=1:b=1:s=0.3\" \"output.mp4\"", str);
         }
+
+        [TestMethod]
+        public void Builder_BuildString_Audible_AAXC_Decryption()
+        {
+            var str = FFMpegArguments.FromFileInput("input.aaxc", false, x => x.WithAudibleEncryptionKeys("123", "456"))
+                .MapMetaData()
+                .OutputToFile("output.m4b", true, x => x.WithTagVersion(3).DisableChannel(Channel.Video).CopyChannel(Channel.Audio))
+                .Arguments;
+
+            Assert.AreEqual("-audible_key 123 -audible_iv 456 -i \"input.aaxc\" -map_metadata 0 -id3v2_version 3 -vn -c:a copy \"output.m4b\" -y", str);
+        }
     }
 }
\ No newline at end of file
diff --git a/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs b/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs
index 8443d0d..6e30999 100644
--- a/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs
+++ b/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs
@@ -94,5 +94,20 @@ public void Concat_Escape()
             var arg = new DemuxConcatArgument(new[] { @"Heaven's River\05 - Investigation.m4b" });
             arg.Values.Should().BeEquivalentTo(new[] { @"file 'Heaven'\''s River\05 - Investigation.m4b'" });
         }
+
+        [TestMethod]
+        public void Audible_Aaxc_Test()
+        {
+            var arg = new AudibleEncryptionKeyArgument("123", "456");
+            arg.Text.Should().Be($"-audible_key 123 -audible_iv 456");
+        }
+
+
+        [TestMethod]
+        public void Audible_Aax_Test()
+        {
+            var arg = new AudibleEncryptionKeyArgument("62689101");
+            arg.Text.Should().Be($"-activation_bytes 62689101");
+        }
     }
 }
\ No newline at end of file
diff --git a/FFMpegCore.Test/MetaDataBuilderTests.cs b/FFMpegCore.Test/MetaDataBuilderTests.cs
index 5f0a144..747fd9e 100644
--- a/FFMpegCore.Test/MetaDataBuilderTests.cs
+++ b/FFMpegCore.Test/MetaDataBuilderTests.cs
@@ -4,8 +4,10 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using System.Text;
+using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 
 namespace FFMpegCore.Test
@@ -50,5 +52,29 @@ public void TestMetaDataBuilderIntegrity()
             Assert.IsTrue(serialized.Contains("title=Chapter 01", StringComparison.OrdinalIgnoreCase));
             Assert.IsTrue(serialized.Contains("album_artist=Pachelbel", StringComparison.OrdinalIgnoreCase));
         }
+
+        [TestMethod]
+        public void TestMapMetadata()
+        {
+            //-i "whaterver0" // index: 0
+            //-f concat -safe 0
+            //-i "\AppData\Local\Temp\concat_b511f2bf-c4af-4f71-b9bd-24d706bf4861.txt"   // index: 1
+            //-i "\AppData\Local\Temp\metadata_210d3259-3d5c-43c8-9786-54b5c414fa70.txt" // index: 2
+            //-map_metadata 2
+
+            var text0 = FFMpegArguments.FromFileInput("whaterver0")
+                .AddMetaData("WhatEver3")
+                .Text;
+
+            var text1 = FFMpegArguments.FromFileInput("whaterver0")
+                .AddDemuxConcatInput(new[] { "whaterver", "whaterver1" })
+                .AddMetaData("WhatEver3")
+                .Text;
+
+
+
+            Assert.IsTrue(Regex.IsMatch(text0, "metadata_[0-9a-f-]+\\.txt\" -map_metadata 1"), "map_metadata index is calculated incorrectly.");
+            Assert.IsTrue(Regex.IsMatch(text1, "metadata_[0-9a-f-]+\\.txt\" -map_metadata 2"), "map_metadata index is calculated incorrectly.");
+        }
     }
 }
diff --git a/FFMpegCore/Extend/StringExtensions.cs b/FFMpegCore/Extend/StringExtensions.cs
index 29c8d42..7b02089 100644
--- a/FFMpegCore/Extend/StringExtensions.cs
+++ b/FFMpegCore/Extend/StringExtensions.cs
@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Text;
 
 namespace FFMpegCore.Extend
diff --git a/FFMpegCore/FFMpeg/Arguments/AudibleEncryptionKeyArgument.cs b/FFMpegCore/FFMpeg/Arguments/AudibleEncryptionKeyArgument.cs
new file mode 100644
index 0000000..0f514dc
--- /dev/null
+++ b/FFMpegCore/FFMpeg/Arguments/AudibleEncryptionKeyArgument.cs
@@ -0,0 +1,28 @@
+namespace FFMpegCore.Arguments
+{
+    public class AudibleEncryptionKeyArgument : IArgument
+    {
+        private readonly bool _aaxcMode;
+        
+        private readonly string _key;
+        private readonly string _iv;
+
+        private readonly string _activationBytes;
+
+
+        public AudibleEncryptionKeyArgument(string activationBytes)
+        {
+            _activationBytes = activationBytes;
+        }
+
+        public AudibleEncryptionKeyArgument(string key, string iv)
+        {
+            _aaxcMode = true;
+
+            _key = key;
+            _iv = iv;
+        }
+
+        public string Text => _aaxcMode ? $"-audible_key {_key} -audible_iv {_iv}" : $"-activation_bytes {_activationBytes}";
+    }
+}
diff --git a/FFMpegCore/FFMpeg/Arguments/ID3V2VersionArgument.cs b/FFMpegCore/FFMpeg/Arguments/ID3V2VersionArgument.cs
new file mode 100644
index 0000000..e18d93b
--- /dev/null
+++ b/FFMpegCore/FFMpeg/Arguments/ID3V2VersionArgument.cs
@@ -0,0 +1,14 @@
+namespace FFMpegCore.Arguments
+{
+    public class ID3V2VersionArgument : IArgument
+    {
+        private readonly int _version;
+
+        public ID3V2VersionArgument(int version)
+        {
+            _version = version;
+        }
+
+        public string Text => $"-id3v2_version {_version}";
+    }
+}
diff --git a/FFMpegCore/FFMpeg/Arguments/IDynamicArgument.cs b/FFMpegCore/FFMpeg/Arguments/IDynamicArgument.cs
new file mode 100644
index 0000000..36a504e
--- /dev/null
+++ b/FFMpegCore/FFMpeg/Arguments/IDynamicArgument.cs
@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+using System.Text;
+
+namespace FFMpegCore.Arguments
+{
+    public interface IDynamicArgument
+    {
+        /// <summary>
+        /// Same as <see cref="IArgument.Text"/>, but this receives the arguments generated before as parameter
+        /// </summary>
+        /// <param name="context"></param>
+        /// <returns></returns>
+        //public string GetText(StringBuilder context);
+        public string GetText(IEnumerable<IArgument> context);
+    }
+}
\ No newline at end of file
diff --git a/FFMpegCore/FFMpeg/Arguments/MapMetadataArgument.cs b/FFMpegCore/FFMpeg/Arguments/MapMetadataArgument.cs
new file mode 100644
index 0000000..afec731
--- /dev/null
+++ b/FFMpegCore/FFMpeg/Arguments/MapMetadataArgument.cs
@@ -0,0 +1,64 @@
+using FFMpegCore.Extend;
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace FFMpegCore.Arguments
+{
+    public class MapMetadataArgument : IInputArgument, IDynamicArgument
+    {
+        private readonly int? _inputIndex;
+
+        public string Text => GetText(null);
+
+        /// <summary>
+        /// Null means it takes the last input used before this argument
+        /// </summary>
+        /// <param name="inputIndex"></param>
+        public MapMetadataArgument(int? inputIndex = null)
+        {
+            _inputIndex = inputIndex;
+        }
+
+        public string GetText(IEnumerable<IArgument>? arguments)
+        {
+            arguments ??= Enumerable.Empty<IArgument>();
+
+            var index = 0;
+            if (_inputIndex is null)
+            {
+                index = arguments
+                   .TakeWhile(x => x != this)
+                   .OfType<IInputArgument>()
+                   .Count();
+
+                index = Math.Max(index - 1, 0);
+            }
+            else
+            {
+                index = _inputIndex.Value;
+            }
+
+            return $"-map_metadata {index}";
+        }
+
+        public Task During(CancellationToken cancellationToken = default)
+        {
+            return Task.CompletedTask;
+        }
+
+        public void Post()
+        {
+        }
+
+        public void Pre()
+        {
+        }
+
+
+    }
+}
diff --git a/FFMpegCore/FFMpeg/Arguments/MetaDataArgument.cs b/FFMpegCore/FFMpeg/Arguments/MetaDataArgument.cs
index 7e9ffc6..89bb1fe 100644
--- a/FFMpegCore/FFMpeg/Arguments/MetaDataArgument.cs
+++ b/FFMpegCore/FFMpeg/Arguments/MetaDataArgument.cs
@@ -1,11 +1,16 @@
-using System;
+using FFMpegCore.Extend;
+
+using System;
+using System.Collections.Generic;
 using System.IO;
+using System.Linq;
+using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 
 namespace FFMpegCore.Arguments
 {
-    public class MetaDataArgument : IInputArgument
+    public class MetaDataArgument : IInputArgument, IDynamicArgument
     {
         private readonly string _metaDataContent;
         private readonly string _tempFileName = Path.Combine(GlobalFFOptions.Current.TemporaryFilesFolder, $"metadata_{Guid.NewGuid()}.txt");
@@ -15,7 +20,7 @@ public MetaDataArgument(string metaDataContent)
             _metaDataContent = metaDataContent;
         }
 
-        public string Text => $"-i \"{_tempFileName}\" -map_metadata 1";
+        public string Text => GetText(null);
 
         public Task During(CancellationToken cancellationToken = default) => Task.CompletedTask;
 
@@ -23,5 +28,17 @@ public MetaDataArgument(string metaDataContent)
         public void Pre() => File.WriteAllText(_tempFileName, _metaDataContent);
 
         public void Post() => File.Delete(_tempFileName);
+
+        public string GetText(IEnumerable<IArgument>? arguments)
+        {
+            arguments ??= Enumerable.Empty<IArgument>();
+
+            var index = arguments
+                .TakeWhile(x => x != this)
+                .OfType<IInputArgument>()
+                .Count();
+
+            return $"-i \"{_tempFileName}\" -map_metadata {index}";
+        }
     }
 }
diff --git a/FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs b/FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs
index ca6628a..7b3da7a 100644
--- a/FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs
+++ b/FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Drawing;
+
 using FFMpegCore.Arguments;
 using FFMpegCore.Enums;
 
@@ -66,6 +67,11 @@ public FFMpegArgumentOptions WithAudioFilters(Action<AudioFilterOptions> audioFi
         public FFMpegArgumentOptions ForcePixelFormat(string pixelFormat) => WithArgument(new ForcePixelFormat(pixelFormat));
         public FFMpegArgumentOptions ForcePixelFormat(PixelFormat pixelFormat) => WithArgument(new ForcePixelFormat(pixelFormat));
 
+        public FFMpegArgumentOptions WithAudibleEncryptionKeys(string key, string iv) => WithArgument(new AudibleEncryptionKeyArgument(key, iv));
+        public FFMpegArgumentOptions WithAudibleActivationBytes(string activationBytes) => WithArgument(new AudibleEncryptionKeyArgument(activationBytes));
+        public FFMpegArgumentOptions WithTagVersion(int id3v2Version = 3) => WithArgument(new ID3V2VersionArgument(id3v2Version));
+
+
         public FFMpegArgumentOptions WithArgument(IArgument argument)
         {
             Arguments.Add(argument);
diff --git a/FFMpegCore/FFMpeg/FFMpegArguments.cs b/FFMpegCore/FFMpeg/FFMpegArguments.cs
index 6c9784d..c100c85 100644
--- a/FFMpegCore/FFMpeg/FFMpegArguments.cs
+++ b/FFMpegCore/FFMpeg/FFMpegArguments.cs
@@ -2,8 +2,10 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
+
 using FFMpegCore.Arguments;
 using FFMpegCore.Builders.MetaData;
 using FFMpegCore.Pipes;
@@ -13,10 +15,16 @@ namespace FFMpegCore
     public sealed class FFMpegArguments : FFMpegArgumentsBase
     {
         private readonly FFMpegGlobalArguments _globalArguments = new FFMpegGlobalArguments();
-        
+
         private FFMpegArguments() { }
 
-        public string Text => string.Join(" ", _globalArguments.Arguments.Concat(Arguments).Select(arg => arg.Text));
+        public string Text => GetText();
+
+        private string GetText()
+        {
+            var allArguments = _globalArguments.Arguments.Concat(Arguments).ToArray();
+            return string.Join(" ", allArguments.Select(arg => arg is IDynamicArgument dynArg ? dynArg.GetText(allArguments) : arg.Text));
+        }
 
         public static FFMpegArguments FromConcatInput(IEnumerable<string> filePaths, Action<FFMpegArgumentOptions>? addArguments = null) => new FFMpegArguments().WithInput(new ConcatArgument(filePaths), addArguments);
         public static FFMpegArguments FromDemuxConcatInput(IEnumerable<string> filePaths, Action<FFMpegArgumentOptions>? addArguments = null) => new FFMpegArguments().WithInput(new DemuxConcatArgument(filePaths), addArguments);
@@ -26,7 +34,7 @@ private FFMpegArguments() { }
         public static FFMpegArguments FromDeviceInput(string device, Action<FFMpegArgumentOptions>? addArguments = null) => new FFMpegArguments().WithInput(new InputDeviceArgument(device), addArguments);
         public static FFMpegArguments FromPipeInput(IPipeSource sourcePipe, Action<FFMpegArgumentOptions>? addArguments = null) => new FFMpegArguments().WithInput(new InputPipeArgument(sourcePipe), addArguments);
 
-        
+
         public FFMpegArguments WithGlobalOptions(Action<FFMpegGlobalArguments> configureOptions)
         {
             configureOptions(_globalArguments);
@@ -42,6 +50,13 @@ public FFMpegArguments WithGlobalOptions(Action<FFMpegGlobalArguments> configure
         public FFMpegArguments AddMetaData(string content, Action<FFMpegArgumentOptions>? addArguments = null) => WithInput(new MetaDataArgument(content), addArguments);
         public FFMpegArguments AddMetaData(IReadOnlyMetaData metaData, Action<FFMpegArgumentOptions>? addArguments = null) => WithInput(new MetaDataArgument(MetaDataSerializer.Instance.Serialize(metaData)), addArguments);
 
+
+        /// <summary>
+        /// Maps the metadata of the given stream
+        /// </summary>
+        /// <param name="inputIndex">null means, the previous input will be used</param>
+        public FFMpegArguments MapMetaData(int? inputIndex = null, Action<FFMpegArgumentOptions>? addArguments = null) => WithInput(new MapMetadataArgument(inputIndex), addArguments);
+
         private FFMpegArguments WithInput(IInputArgument inputArgument, Action<FFMpegArgumentOptions>? addArguments)
         {
             var arguments = new FFMpegArgumentOptions();
@@ -81,4 +96,4 @@ internal void Post()
                 argument.Post();
         }
     }
-}
\ No newline at end of file
+}