From 21d1df824f54d311d2ce9e3b9e60d208687f370b Mon Sep 17 00:00:00 2001
From: Jonas Kamsker <11245306+JKamsker@users.noreply.github.com>
Date: Tue, 4 Jan 2022 16:05:40 +0100
Subject: [PATCH 1/2] Added string escape for DemuxConcatArgument

Fixes issue when source files have a ``'`` in their path
---
 FFMpegCore/FFMpeg/Arguments/DemuxConcatArgument.cs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/FFMpegCore/FFMpeg/Arguments/DemuxConcatArgument.cs b/FFMpegCore/FFMpeg/Arguments/DemuxConcatArgument.cs
index c672c74..47564f9 100644
--- a/FFMpegCore/FFMpeg/Arguments/DemuxConcatArgument.cs
+++ b/FFMpegCore/FFMpeg/Arguments/DemuxConcatArgument.cs
@@ -16,8 +16,17 @@ public class DemuxConcatArgument : IInputArgument
         public readonly IEnumerable<string> Values;
         public DemuxConcatArgument(IEnumerable<string> values)
         {
-            Values = values.Select(value => $"file '{value}'");
+            Values = values.Select(value => $"file '{Escape(value)}'");
         }
+
+        /// <summary>
+        /// Thanks slhck
+        /// https://superuser.com/a/787651/1089628
+        /// </summary>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        private string Escape(string value) => value.Replace("'", @"'\''");
+        
         private readonly string _tempFileName = Path.Combine(GlobalFFOptions.Current.TemporaryFilesFolder, $"concat_{Guid.NewGuid()}.txt");
 
         public void Pre() => File.WriteAllLines(_tempFileName, Values);

From e79448df485b017a7d5fde49efd17b38e98df4c2 Mon Sep 17 00:00:00 2001
From: Jonas Kamsker <git.jonas@kamsker.at>
Date: Tue, 4 Jan 2022 17:47:10 +0100
Subject: [PATCH 2/2] Added unit test

---
 FFMpegCore.Test/FFMpegArgumentProcessorTest.cs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs b/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs
index dc65489..8443d0d 100644
--- a/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs
+++ b/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs
@@ -1,6 +1,7 @@
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using FluentAssertions;
 using System.Reflection;
+using FFMpegCore.Arguments;
 
 namespace FFMpegCore.Test
 {
@@ -86,5 +87,12 @@ FFMpegArgumentProcessor CreateArgumentProcessor() => FFMpegArguments
             var options2 = processor2.GetConfiguredOptions(null);
             options2.WorkingDirectory.Should().Be(globalWorkingDir);
         }
+
+        [TestMethod]
+        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'" });
+        }
     }
 }
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