1 files changed, 13 insertions, 4 deletions
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
index 92ceb2c54..21c4798af 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
@@ -3527,20 +3527,29 @@ namespace MediaBrowser.Controller.MediaEncoding
             {
                 // tonemapx requires yuv420p10 input for dovi reshaping, let ffmpeg convert the frame when necessary
                 var tonemapFormat = requireDoviReshaping ? "yuv420p" : outFormat;
-
-                var tonemapArgs = $"tonemapx=tonemap={options.TonemappingAlgorithm}:desat={options.TonemappingDesat}:peak={options.TonemappingPeak}:t=bt709:m=bt709:p=bt709:format={tonemapFormat}";
+                var tonemapArgString = "tonemapx=tonemap={0}:desat={1}:peak={2}:t=bt709:m=bt709:p=bt709:format={3}";
 
                 if (options.TonemappingParam != 0)
                 {
-                    tonemapArgs += $":param={options.TonemappingParam}";
+                    tonemapArgString += ":param={4}";
                 }
 
                 var range = options.TonemappingRange;
                 if (range == TonemappingRange.tv || range == TonemappingRange.pc)
                 {
-                    tonemapArgs += $":range={options.TonemappingRange}";
+                    tonemapArgString += ":range={5}";
                 }
 
+                var tonemapArgs = string.Format(
+                    CultureInfo.InvariantCulture,
+                    tonemapArgString,
+                    options.TonemappingAlgorithm,
+                    options.TonemappingDesat,
+                    options.TonemappingPeak,
+                    tonemapFormat,
+                    options.TonemappingParam,
+                    options.TonemappingRange);
+
                 mainFilters.Add(tonemapArgs);
             }
             else