use the clip algorithm for software tonemapping (#2032)

CHANGELOG.md

@@ -25,7 +25,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Add basic HDR transcoding support
   - VAAPI may use hardware-accelerated tone mapping (when opencl accel is also available)
   - NVIDIA may use hardware-accelerated tone mapping (when vulkan accel and libplacebo filter are also available)
-  - In all other cases, HDR content will use a software pipeline
+  - In all other cases, HDR content will use a software pipeline and the clip algorithm
 
 ### Changed
 - Start to make UI minimally responsive (functional on smaller screens)

ErsatzTV.FFmpeg/Filter/TonemapFilter.cs

@@ -20,7 +20,7 @@ public class TonemapFilter : BaseFilter
             string pixelFormat = _currentState.PixelFormat.Match(pf => pf.FFmpegName, () => string.Empty);
 
             var tonemap =
-                $"zscale=transfer=linear,tonemap=hable,zscale=transfer=bt709,format={_desiredPixelFormat.FFmpegName}";
+                $"zscale=transfer=linear,tonemap=clip,zscale=transfer=bt709,format={_desiredPixelFormat.FFmpegName}";
 
             if (_currentState.FrameDataLocation == FrameDataLocation.Hardware)
             {