From c2d28055c1e9f11334b9a079221ef6e43f43b63c Mon Sep 17 00:00:00 2001
From: Malte Rosenbjerg <rosenbjerg@users.noreply.github.com>
Date: Mon, 1 Nov 2021 18:13:23 +0100
Subject: [PATCH] Support for specyfying process working directory through
 FFOptions (#272)

---
 FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs | 11 ++++++-----
 FFMpegCore/FFOptions.cs                      |  5 +++++
 FFMpegCore/FFProbe/FFProbe.cs                |  3 ++-
 3 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs b/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs
index 060ffc3..0fac769 100644
--- a/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs
+++ b/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs
@@ -145,17 +145,18 @@ private bool HandleCompletion(bool throwOnError, int exitCode, IReadOnlyList<str
             return exitCode == 0;
         }
 
-        private Instance PrepareInstance(FFOptions ffMpegOptions,
+        private Instance PrepareInstance(FFOptions ffOptions,
             out CancellationTokenSource cancellationTokenSource)
         {
             FFMpegHelper.RootExceptionCheck();
-            FFMpegHelper.VerifyFFMpegExists(ffMpegOptions);
+            FFMpegHelper.VerifyFFMpegExists(ffOptions);
             var startInfo = new ProcessStartInfo
             {
-                FileName = GlobalFFOptions.GetFFMpegBinaryPath(ffMpegOptions),
+                FileName = GlobalFFOptions.GetFFMpegBinaryPath(ffOptions),
                 Arguments = _ffMpegArguments.Text,
-                StandardOutputEncoding = ffMpegOptions.Encoding,
-                StandardErrorEncoding = ffMpegOptions.Encoding,
+                StandardOutputEncoding = ffOptions.Encoding,
+                StandardErrorEncoding = ffOptions.Encoding,
+                WorkingDirectory = ffOptions.WorkingDirectory
             };
             var instance = new Instance(startInfo);
             cancellationTokenSource = new CancellationTokenSource();
diff --git a/FFMpegCore/FFOptions.cs b/FFMpegCore/FFOptions.cs
index 1f7e497..94ce212 100644
--- a/FFMpegCore/FFOptions.cs
+++ b/FFMpegCore/FFOptions.cs
@@ -6,6 +6,11 @@ namespace FFMpegCore
 {
     public class FFOptions
     {
+        /// <summary>
+        /// Working directory for the ffmpeg/ffprobe instance
+        /// </summary>
+        public string WorkingDirectory { get; set; } = string.Empty;
+        
         /// <summary>
         /// Folder container ffmpeg and ffprobe binaries. Leave empty if ffmpeg and ffprobe are present in PATH
         /// </summary>
diff --git a/FFMpegCore/FFProbe/FFProbe.cs b/FFMpegCore/FFProbe/FFProbe.cs
index 89f905d..d0e8ea8 100644
--- a/FFMpegCore/FFProbe/FFProbe.cs
+++ b/FFMpegCore/FFProbe/FFProbe.cs
@@ -165,7 +165,8 @@ private static Instance PrepareInstance(string arguments, int outputCapacity, FF
             var startInfo = new ProcessStartInfo(GlobalFFOptions.GetFFProbeBinaryPath(), arguments)
             {
                 StandardOutputEncoding = ffOptions.Encoding,
-                StandardErrorEncoding = ffOptions.Encoding
+                StandardErrorEncoding = ffOptions.Encoding,
+                WorkingDirectory = ffOptions.WorkingDirectory
             };
             var instance = new Instance(startInfo) { DataBufferCapacity = outputCapacity };
             return instance;