try to workaround amd crop metadata ffmpeg bug

ErsatzTV.FFmpeg/OutputOption/AmdCropMetadataWorkaroundFilter.cs

@@ -0,0 +1,34 @@
+using ErsatzTV.FFmpeg.Format;
+
+namespace ErsatzTV.FFmpeg.OutputOption;
+
+public class AmdCropMetadataWorkaroundFilter(string videoFormat, FrameSize frameSize) : OutputOption
+{
+    public override string[] OutputOptions
+    {
+        get
+        {
+            if (videoFormat is not VideoFormat.Hevc)
+            {
+                return [];
+            }
+
+            int cropPixels = frameSize.Height switch
+            {
+                1080 => 8,
+                _ => 0
+            };
+
+            if (cropPixels == 0)
+            {
+                return [];
+            }
+
+            return
+            [
+                "-bsf:v",
+                $"{videoFormat}_metadata=crop_bottom={cropPixels}"
+            ];
+        }
+    }
+}

ErsatzTV.FFmpeg/Pipeline/VaapiPipelineBuilder.cs

@@ -283,6 +283,14 @@ public class VaapiPipelineBuilder : SoftwarePipelineBuilder
             currentState,
             pipelineSteps);
 
+        if (ffmpegState.VaapiDriver == "radeonsi")
+        {
+            pipelineSteps.Add(
+                new AmdCropMetadataWorkaroundFilter(
+                    desiredState.VideoFormat,
+                    desiredState.CroppedSize.IfNone(desiredState.PaddedSize)));
+        }
+
         return new FilterChain(
             videoInputFile.FilterSteps,
             watermarkInputFile.Map(wm => wm.FilterSteps).IfNone([]),