From fb8c3a04534db01f1c7520c96f96b57440b9fd94 Mon Sep 17 00:00:00 2001
From: Jason Dove <jason@jasondove.me>
Date: Tue, 23 Nov 2021 13:25:23 -0600
Subject: [PATCH] disable autoscale when looping with vaapi or qsv (#494)

---
 ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs b/ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs
index 551786205..d72b3ab6a 100644
--- a/ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs
+++ b/ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs
@@ -42,6 +42,7 @@ namespace ErsatzTV.Core.FFmpeg
         private string _vaapiDevice;
         private HardwareAccelerationKind _hwAccel;
         private string _outputPixelFormat;
+        private bool _noAutoScale;
 
         public FFmpegProcessBuilder(string ffmpegPath, bool saveReports, ILogger logger)
         {
@@ -147,6 +148,11 @@ namespace ErsatzTV.Core.FFmpeg
             {
                 _arguments.Add("-stream_loop");
                 _arguments.Add("-1");
+                
+                if (_hwAccel is HardwareAccelerationKind.Qsv or HardwareAccelerationKind.Vaapi)
+                {
+                    _noAutoScale = true;
+                }
             }
 
             return this;
@@ -460,6 +466,12 @@ namespace ErsatzTV.Core.FFmpeg
                 });
 
             _arguments.AddRange(arguments);
+
+            if (_noAutoScale)
+            {
+                _arguments.Add("-noautoscale");
+            }
+
             return this;
         }