remove all use of setsar filter (#928)

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## [Unreleased]
 ### Fixed
 - Use MIME Type `application/x-mpegurl` for all playlists instead of `application/vnd.apple.mpegurl`
+- Remove `setsar` filter which caused issues scaling between two different aspect ratios
+  - For example, some 4:3 content would appear stretched when scaled to a 16:9 resolution
 
 ### Added
 - Support DSD audio file formats (DFF and DSF) in local song libraries

ErsatzTV.FFmpeg/PipelineBuilder.cs

@@ -379,10 +379,6 @@ public class PipelineBuilder
                         IPipelineFilterStep padStep = new PadFilter(currentState, desiredState.PaddedSize);
                         currentState = padStep.NextState(currentState);
                         _videoInputFile.Iter(f => f.FilterSteps.Add(padStep));
-
-                        IPipelineFilterStep sarStep = new SetSarFilter();
-                        currentState = sarStep.NextState(currentState);
-                        _videoInputFile.Iter(f => f.FilterSteps.Add(sarStep));
                     }
                 }
                 else if (currentState.ScaledSize != desiredState.ScaledSize)
@@ -402,10 +398,6 @@ public class PipelineBuilder
                         currentState = padStep.NextState(currentState);
                         _videoInputFile.Iter(f => f.FilterSteps.Add(padStep));
                     }
-
-                    IPipelineFilterStep sarStep = new SetSarFilter();
-                    currentState = sarStep.NextState(currentState);
-                    _videoInputFile.Iter(f => f.FilterSteps.Add(sarStep));
                 }
                 else if (currentState.PaddedSize != desiredState.PaddedSize)
                 {
@@ -423,10 +415,6 @@ public class PipelineBuilder
                         currentState = padStep.NextState(currentState);
                         _videoInputFile.Iter(f => f.FilterSteps.Add(padStep));
                     }
-
-                    IPipelineFilterStep sarStep = new SetSarFilter();
-                    currentState = sarStep.NextState(currentState);
-                    _videoInputFile.Iter(f => f.FilterSteps.Add(sarStep));
                 }
 
                 if (hasOverlay && currentState.PixelFormat.Map(pf => pf.FFmpegName) !=