From fe5c1f5b58d4089d87036783dd302ca319256563 Mon Sep 17 00:00:00 2001
From: Kevin Heritage <kheritage222@protonmail.com>
Date: Mon, 23 May 2022 07:32:32 +0200
Subject: [PATCH] Create end seek argument

---
 FFMpegCore.Test/ArgumentBuilderTest.cs        |  7 ++++
 .../FFMpeg/Arguments/EndSeekArgument.cs       | 35 +++++++++++++++++++
 FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs    |  1 +
 3 files changed, 43 insertions(+)
 create mode 100644 FFMpegCore/FFMpeg/Arguments/EndSeekArgument.cs

diff --git a/FFMpegCore.Test/ArgumentBuilderTest.cs b/FFMpegCore.Test/ArgumentBuilderTest.cs
index f676a44..2c550c9 100644
--- a/FFMpegCore.Test/ArgumentBuilderTest.cs
+++ b/FFMpegCore.Test/ArgumentBuilderTest.cs
@@ -258,6 +258,13 @@ public void Builder_BuildString_Seek()
             Assert.AreEqual("-ss 00:00:10.000 -i \"input.mp4\" -ss 00:00:10.000 \"output.mp4\"", str);
         }
 
+        [TestMethod]
+        public void Builder_BuildString_EndSeek()
+        {
+            var str = FFMpegArguments.FromFileInput("input.mp4", false, opt => opt.EndSeek(TimeSpan.FromSeconds(10))).OutputToFile("output.mp4", false, opt => opt.EndSeek(TimeSpan.FromSeconds(10))).Arguments;
+            Assert.AreEqual("-to 00:00:10.000 -i \"input.mp4\" -to 00:00:10.000 \"output.mp4\"", str);
+        }
+
         [TestMethod]
         public void Builder_BuildString_Shortest()
         {
diff --git a/FFMpegCore/FFMpeg/Arguments/EndSeekArgument.cs b/FFMpegCore/FFMpeg/Arguments/EndSeekArgument.cs
new file mode 100644
index 0000000..5ced1c4
--- /dev/null
+++ b/FFMpegCore/FFMpeg/Arguments/EndSeekArgument.cs
@@ -0,0 +1,35 @@
+using System;
+
+namespace FFMpegCore.Arguments
+{
+    /// <summary>
+    /// Represents seek parameter
+    /// </summary>
+    public class EndSeekArgument : IArgument
+    {
+        public readonly TimeSpan? SeekTo;
+
+        public EndSeekArgument(TimeSpan? seekTo)
+        {
+            SeekTo = seekTo;
+        }
+
+        public string Text {
+            get { 
+                if(SeekTo.HasValue)
+                {
+                    int hours = SeekTo.Value.Hours;
+                    if(SeekTo.Value.Days > 0)
+                    {
+                        hours += SeekTo.Value.Days * 24;
+                    }
+                    return $"-to {hours.ToString("00")}:{SeekTo.Value.Minutes.ToString("00")}:{SeekTo.Value.Seconds.ToString("00")}.{SeekTo.Value.Milliseconds.ToString("000")}";
+                }
+                else
+                {
+                    return string.Empty;
+                }
+            }
+        }
+    }
+}
diff --git a/FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs b/FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs
index 0f54b8c..cc49c5f 100644
--- a/FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs
+++ b/FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs
@@ -54,6 +54,7 @@ public FFMpegArgumentOptions WithAudioFilters(Action<AudioFilterOptions> audioFi
         public FFMpegArgumentOptions WithCustomArgument(string argument) => WithArgument(new CustomArgument(argument));
 
         public FFMpegArgumentOptions Seek(TimeSpan? seekTo) => WithArgument(new SeekArgument(seekTo));
+        public FFMpegArgumentOptions EndSeek(TimeSpan? seekTo) => WithArgument(new EndSeekArgument(seekTo));
         public FFMpegArgumentOptions Loop(int times) => WithArgument(new LoopArgument(times));
         public FFMpegArgumentOptions OverwriteExisting() => WithArgument(new OverwriteArgument());
         public FFMpegArgumentOptions SelectStream(int streamIndex, int inputFileIndex = 0,