only scale to even dimensions (#187)

ErsatzTV.Core.Tests/FFmpeg/FFmpegPlaybackSettingsCalculatorTests.cs

@@ -1,6 +1,7 @@
 using System;
 using ErsatzTV.Core.Domain;
 using ErsatzTV.Core.FFmpeg;
+using ErsatzTV.Core.Interfaces.FFmpeg;
 using FluentAssertions;
 using NUnit.Framework;
 
@@ -276,6 +277,32 @@ namespace ErsatzTV.Core.Tests.FFmpeg
                 actual.ScaledSize.IsNone.Should().BeTrue();
                 actual.PadToDesiredResolution.Should().BeTrue();
             }
+            
+            [Test]
+            public void Should_ScaleToEvenDimensions_ForTransportStream()
+            {
+                FFmpegProfile ffmpegProfile = TestProfile() with
+                {
+                    NormalizeVideo = true,
+                    Resolution = new Resolution { Width = 1280, Height = 720 }
+                };
+
+                var version = new MediaVersion { Width = 706, Height = 362, SampleAspectRatio = "32:27" };
+
+                FFmpegPlaybackSettings actual = _calculator.CalculateSettings(
+                    StreamingMode.TransportStream,
+                    ffmpegProfile,
+                    version,
+                    new MediaStream(),
+                    new MediaStream(),
+                    DateTimeOffset.Now,
+                    DateTimeOffset.Now);
+
+                IDisplaySize scaledSize = actual.ScaledSize.IfNone(new MediaVersion { Width = 0, Height = 0 });
+                scaledSize.Width.Should().Be(1280);
+                scaledSize.Height.Should().Be(554);
+                actual.PadToDesiredResolution.Should().BeTrue();
+            }
 
             [Test]
             public void Should_NotPadToDesiredResolution_When_UnscaledContentIsUnderSized_ForHttpLiveStreaming()

ErsatzTV.Core/FFmpeg/FFmpegPlaybackSettingsCalculator.cs

@@ -79,7 +79,9 @@ namespace ErsatzTV.Core.FFmpeg
                         IDisplaySize scaledSize = CalculateScaledSize(ffmpegProfile, version);
                         if (!scaledSize.IsSameSizeAs(version))
                         {
-                            result.ScaledSize = Some(CalculateScaledSize(ffmpegProfile, version));
+                            int fixedHeight = scaledSize.Height + (scaledSize.Height % 2);
+                            int fixedWidth = scaledSize.Width + (scaledSize.Width % 2);
+                            result.ScaledSize = Some((IDisplaySize)new DisplaySize(fixedWidth, fixedHeight));
                         }
                     }