fix nvidia pipeline that only requires setparams (#1074)

ErsatzTV.Core.Tests/FFmpeg/TranscodingTests.cs

@@ -130,6 +130,9 @@ public class TranscodingTests
             // example format that requires colorspace filter
             new("libx264", "yuv420p", "tv", "smpte170m", "bt709", "smpte170m"),
 
+            // example format that requires setparams filter
+            new("libx264", "yuv420p", string.Empty, string.Empty, string.Empty, string.Empty),
+
             // new("libx264", "yuvj420p"),
             new("libx264", "yuv420p10le"),
             // new("libx264", "yuv444p10le"),

ErsatzTV.FFmpeg/Pipeline/NvidiaPipelineBuilder.cs

@@ -300,13 +300,14 @@ public class NvidiaPipelineBuilder : SoftwarePipelineBuilder
 
                 if (currentState.FrameDataLocation == FrameDataLocation.Hardware)
                 {
-                    bool noPipelineFilters = !pipelineSteps.OfType<IPipelineFilterStep>().Any();
-                    bool softwareColorspace = result is [ColorspaceFilter colorspace] &&
-                                              !colorspace.Filter.StartsWith("setparams=");
+                    bool noPipelineFilters = !pipelineSteps
+                        .Filter(ps => ps is not IEncoder)
+                        .OfType<IPipelineFilterStep>().Any();
+                    bool hasColorspace = result is [ColorspaceFilter];
 
                     bool softwareDecoder = ffmpegState.DecoderHardwareAccelerationMode == HardwareAccelerationMode.None;
                     
-                    if (softwareDecoder || (noPipelineFilters && softwareColorspace))
+                    if (softwareDecoder || (noPipelineFilters && hasColorspace))
                     {
                         result.Add(new CudaFormatFilter(format));
                     }