From 27683c478ba96c7cca1812fc9c6796de6c898628 Mon Sep 17 00:00:00 2001
From: Malte Rosenbjerg <rosenbjerg@users.noreply.github.com>
Date: Fri, 15 Apr 2022 12:55:34 +0200
Subject: [PATCH] Fix for JoinImageSequence #281

Former-commit-id: 9c0b2bdb442c25a92bccc83a329a7956dd5dae04
---
 FFMpegCore.Test/VideoTest.cs | 2 +-
 FFMpegCore/FFMpeg/FFMpeg.cs  | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/FFMpegCore.Test/VideoTest.cs b/FFMpegCore.Test/VideoTest.cs
index 56579e9..802f83e 100644
--- a/FFMpegCore.Test/VideoTest.cs
+++ b/FFMpegCore.Test/VideoTest.cs
@@ -468,7 +468,7 @@ public void Video_Join_Image_Sequence()
                     }
                 });
 
-            var outputFile = new TemporaryFile("out.mp4");
+            using var outputFile = new TemporaryFile("out.mp4");
             var success = FFMpeg.JoinImageSequence(outputFile, images: imageSet.ToArray());
             Assert.IsTrue(success);
             var result = FFProbe.Analyse(outputFile);
diff --git a/FFMpegCore/FFMpeg/FFMpeg.cs b/FFMpegCore/FFMpeg/FFMpeg.cs
index bceea02..9e9e0ce 100644
--- a/FFMpegCore/FFMpeg/FFMpeg.cs
+++ b/FFMpegCore/FFMpeg/FFMpeg.cs
@@ -325,6 +325,7 @@ public static bool JoinImageSequence(string output, double frameRate = 30, param
                 return FFMpegArguments
                     .FromFileInput(Path.Combine(tempFolderName, "%09d.png"), false)
                     .OutputToFile(output, true, options => options
+                        .ForcePixelFormat("yuv420p")
                         .Resize(firstImage.Width, firstImage.Height)
                         .WithFramerate(frameRate))
                     .ProcessSynchronously();