add videotoolbox

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -2826,6 +2826,38 @@ namespace MediaBrowser.Controller.MediaEncoding
                             return GetHwaccelType(state, encodingOptions, "vp9");
                     }
                 }
+                else if (string.Equals(encodingOptions.HardwareAccelerationType, "videotoolbox", StringComparison.OrdinalIgnoreCase))
+                {
+                    switch (videoStream.Codec.ToLowerInvariant())
+                    {
+                        case "avc":
+                        case "h264":
+                            if (_mediaEncoder.SupportsDecoder("h264_videotoolbox") && encodingOptions.HardwareDecodingCodecs.Contains("h264", StringComparer.OrdinalIgnoreCase))
+                            {
+                                return "-c:v h264_videotoolbox";
+                            }
+                            break;
+                        case "mpeg2video":
+                            if (_mediaEncoder.SupportsDecoder("mpeg2_videotoolbox") && encodingOptions.HardwareDecodingCodecs.Contains("mpeg2video", StringComparer.OrdinalIgnoreCase))
+                            {
+                                return "-c:v mpeg2_videotoolbox";
+                            }
+                            break;
+                        case "mpeg4":
+                            if (_mediaEncoder.SupportsDecoder("mpeg4_videotoolbox") && encodingOptions.HardwareDecodingCodecs.Contains("mpeg4", StringComparer.OrdinalIgnoreCase))
+                            {
+                                return "-c:v mpeg4_videotoolbox";
+                            }
+                            break;
+                        case "vc1":
+                            if (_mediaEncoder.SupportsDecoder("vc1_videotoolbox") && encodingOptions.HardwareDecodingCodecs.Contains("vc1", StringComparer.OrdinalIgnoreCase))
+                            {
+                                return "-c:v vc1_videotoolbox";
+                            }
+                            break;
+                    }
+                }
+                
             }
 
             var whichCodec = videoStream.Codec.ToLowerInvariant();