OpenH264.NET by Cobrowse.io

<PackageReference Include="OpenH264.NET" Version="1.0.3" />

 VideoFrameType

public enum VideoFrameType
namespace OpenH264.NET { public enum VideoFrameType { videoFrameTypeInvalid, videoFrameTypeIDR, videoFrameTypeI, videoFrameTypeP, videoFrameTypeSkip, videoFrameTypeIPMixed } }