Added support for aaxc decryption

FFMpegCore/FFMpeg/Arguments/AudibleEncryptionKeyArgument.cs

@@ -0,0 +1,16 @@
+namespace FFMpegCore.Arguments
+{
+    public class AudibleEncryptionKeyArgument : IArgument
+    {
+        private readonly string _key;
+        private readonly string _iv;
+
+        public AudibleEncryptionKeyArgument(string key, string iv)
+        {
+            _key = key;
+            _iv = iv;
+        }
+
+        public string Text => $"-audible_key {_key} -audible_iv {_iv}";
+    }
+}

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}";
+    }
+}

FFMpegCore/FFMpeg/Arguments/MapMetadataArgument.cs

@@ -0,0 +1,44 @@
+using FFMpegCore.Extend;
+
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace FFMpegCore.Arguments
+{
+    public class MapMetadataArgument : IInputArgument, IDynamicArgument
+    {
+        private readonly int? _inputIndex;
+
+        /// <summary>
+        /// Null means it takes the last input used befroe this argument
+        /// </summary>
+        /// <param name="inputIndex"></param>
+        public MapMetadataArgument(int? inputIndex = null)
+        {
+            _inputIndex = inputIndex;
+        }
+
+        public string Text => GetText(null);
+
+        public string GetText(StringBuilder context)
+        {
+            var index = _inputIndex ?? context?.ToString().CountOccurrences("-i") -1 ?? 0;
+            return $"-map_metadata {index}";
+        }
+
+
+        public Task During(CancellationToken cancellationToken = default)
+        {
+            return Task.CompletedTask;
+        }
+
+        public void Post()
+        {
+        }
+
+        public void Pre()
+        {
+        }
+    }
+}

FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Drawing;
+
 using FFMpegCore.Arguments;
 using FFMpegCore.Enums;
 
@@ -66,6 +67,10 @@ 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 WithTagVersion(int id3v2Version = 3) => WithArgument(new ID3V2VersionArgument(id3v2Version));
+
+
         public FFMpegArgumentOptions WithArgument(IArgument argument)
         {
             Arguments.Add(argument);

FFMpegCore/FFMpeg/FFMpegArguments.cs

@@ -60,6 +60,13 @@ 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();