1 files changed, 21 insertions, 6 deletions
diff --git a/MediaBrowser.Model/Dlna/TranscodingProfile.cs b/MediaBrowser.Model/Dlna/TranscodingProfile.cs
index f05e31047..ea446b733 100644
--- a/MediaBrowser.Model/Dlna/TranscodingProfile.cs
+++ b/MediaBrowser.Model/Dlna/TranscodingProfile.cs
@@ -1,54 +1,69 @@
-#nullable disable
 #pragma warning disable CS1591
 
+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
 using System.Xml.Serialization;
 
 namespace MediaBrowser.Model.Dlna
 {
     public class TranscodingProfile
     {
+        [Required]
         [XmlAttribute("container")]
-        public string Container { get; set; }
+        public string Container { get; set; } = string.Empty;
 
+        [Required]
         [XmlAttribute("type")]
         public DlnaProfileType Type { get; set; }
 
+        [Required]
         [XmlAttribute("videoCodec")]
-        public string VideoCodec { get; set; }
+        public string VideoCodec { get; set; } = string.Empty;
 
+        [Required]
         [XmlAttribute("audioCodec")]
-        public string AudioCodec { get; set; }
+        public string AudioCodec { get; set; } = string.Empty;
 
+        [Required]
         [XmlAttribute("protocol")]
-        public string Protocol { get; set; }
+        public string Protocol { get; set; } = string.Empty;
 
+        [DefaultValue(false)]
         [XmlAttribute("estimateContentLength")]
         public bool EstimateContentLength { get; set; }
 
+        [DefaultValue(false)]
         [XmlAttribute("enableMpegtsM2TsMode")]
         public bool EnableMpegtsM2TsMode { get; set; }
 
+        [DefaultValue(TranscodeSeekInfo.Auto)]
         [XmlAttribute("transcodeSeekInfo")]
         public TranscodeSeekInfo TranscodeSeekInfo { get; set; }
 
+        [DefaultValue(false)]
         [XmlAttribute("copyTimestamps")]
         public bool CopyTimestamps { get; set; }
 
+        [DefaultValue(EncodingContext.Streaming)]
         [XmlAttribute("context")]
         public EncodingContext Context { get; set; }
 
+        [DefaultValue(false)]
         [XmlAttribute("enableSubtitlesInManifest")]
         public bool EnableSubtitlesInManifest { get; set; }
 
         [XmlAttribute("maxAudioChannels")]
-        public string MaxAudioChannels { get; set; }
+        public string? MaxAudioChannels { get; set; }
 
+        [DefaultValue(0)]
         [XmlAttribute("minSegments")]
         public int MinSegments { get; set; }
 
+        [DefaultValue(0)]
         [XmlAttribute("segmentLength")]
         public int SegmentLength { get; set; }
 
+        [DefaultValue(false)]
         [XmlAttribute("breakOnNonKeyFrames")]
         public bool BreakOnNonKeyFrames { get; set; }