diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs index 982572aae5..db0954368a 100644 --- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs +++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs @@ -2060,7 +2060,13 @@ namespace MediaBrowser.Controller.MediaEncoding // libx265 only accept level option in -x265-params. // level option may cause libx265 to fail. // libx265 cannot adjust the given level, just throw an error. - param += " -x265-params:0 subme=3:merange=25:rc-lookahead=10:me=star:ctu=32:max-tu-size=32:min-cu-size=16:rskip=2:rskip-edge-threshold=2:no-sao=1:no-strong-intra-smoothing=1:no-scenecut=1:no-open-gop=1:no-info=1"; + param += " -x265-params:0 no-scenecut=1:no-open-gop=1:no-info=1"; + + if (encodingOptions.EncoderPreset < EncoderPreset.ultrafast) + { + // The following params are slower than the ultrafast preset, don't use when ultrafast is selected. + param += ":subme=3:merange=25:rc-lookahead=10:me=star:ctu=32:max-tu-size=32:min-cu-size=16:rskip=2:rskip-edge-threshold=2:no-sao=1:no-strong-intra-smoothing=1"; + } } if (string.Equals(videoEncoder, "libsvtav1", StringComparison.OrdinalIgnoreCase)