fix concat segmenter for nvidia and qsv (#1622)

ErsatzTV.FFmpeg/Pipeline/NvidiaPipelineBuilder.cs

@@ -8,6 +8,7 @@ using ErsatzTV.FFmpeg.Filter.Cuda;
 using ErsatzTV.FFmpeg.Format;
 using ErsatzTV.FFmpeg.GlobalOption.HardwareAcceleration;
 using ErsatzTV.FFmpeg.InputOption;
+using ErsatzTV.FFmpeg.OutputFormat;
 using ErsatzTV.FFmpeg.OutputOption;
 using ErsatzTV.FFmpeg.State;
 using Microsoft.Extensions.Logging;
@@ -63,6 +64,12 @@ public class NvidiaPipelineBuilder : SoftwarePipelineBuilder
             desiredState.VideoFormat,
             desiredState.VideoProfile,
             desiredState.PixelFormat);
+        
+        // use software encoding (rawvideo) when piping to parent hls segmenter
+        if (ffmpegState.OutputFormat is OutputFormatKind.Nut)
+        {
+            encodeCapability = FFmpegCapability.Software;
+        }
 
         // mpeg2_cuvid seems to have issues when yadif_cuda is used, so just use software decoding
         if (context.ShouldDeinterlace && videoStream.Codec == VideoFormat.Mpeg2Video)

ErsatzTV.FFmpeg/Pipeline/QsvPipelineBuilder.cs

@@ -8,6 +8,7 @@ using ErsatzTV.FFmpeg.Filter.Qsv;
 using ErsatzTV.FFmpeg.Format;
 using ErsatzTV.FFmpeg.GlobalOption.HardwareAcceleration;
 using ErsatzTV.FFmpeg.InputOption;
+using ErsatzTV.FFmpeg.OutputFormat;
 using ErsatzTV.FFmpeg.OutputOption;
 using ErsatzTV.FFmpeg.State;
 using Microsoft.Extensions.Logging;
@@ -65,6 +66,12 @@ public class QsvPipelineBuilder : SoftwarePipelineBuilder
             desiredState.VideoFormat,
             desiredState.VideoProfile,
             desiredState.PixelFormat);
+        
+        // use software encoding (rawvideo) when piping to parent hls segmenter
+        if (ffmpegState.OutputFormat is OutputFormatKind.Nut)
+        {
+            encodeCapability = FFmpegCapability.Software;
+        }
 
         pipelineSteps.Add(new QsvHardwareAccelerationOption(ffmpegState.VaapiDevice));