VideoStreamDescriptor 类
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
表示视频媒体流的说明。
public ref class VideoStreamDescriptor sealed
public ref class VideoStreamDescriptor sealed : IMediaStreamDescriptor2
/// [Windows.Foundation.Metadata.Activatable(Windows.Media.Core.IVideoStreamDescriptorFactory, 65536, Windows.Foundation.UniversalApiContract)]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class VideoStreamDescriptor final
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.Activatable(Windows.Media.Core.IVideoStreamDescriptorFactory, 65536, "Windows.Foundation.UniversalApiContract")]
class VideoStreamDescriptor final
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.Activatable(Windows.Media.Core.IVideoStreamDescriptorFactory, 65536, "Windows.Foundation.UniversalApiContract")]
class VideoStreamDescriptor final : IMediaStreamDescriptor2
[Windows.Foundation.Metadata.Activatable(typeof(Windows.Media.Core.IVideoStreamDescriptorFactory), 65536, typeof(Windows.Foundation.UniversalApiContract))]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class VideoStreamDescriptor
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.Activatable(typeof(Windows.Media.Core.IVideoStreamDescriptorFactory), 65536, "Windows.Foundation.UniversalApiContract")]
public sealed class VideoStreamDescriptor
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.Activatable(typeof(Windows.Media.Core.IVideoStreamDescriptorFactory), 65536, "Windows.Foundation.UniversalApiContract")]
public sealed class VideoStreamDescriptor : IMediaStreamDescriptor2
function VideoStreamDescriptor(encodingProperties)
Public NotInheritable Class VideoStreamDescriptor
Public NotInheritable Class VideoStreamDescriptor
Implements IMediaStreamDescriptor2
- 继承
- 属性
- 实现
Windows 要求
设备系列 |
Windows 10 (在 10.0.10240.0 中引入)
|
API contract |
Windows.Foundation.UniversalApiContract (在 v1.0 中引入)
|
注解
创建 MediaEncodingProfile 时,请调用 SetVideoTracks,传入一个或多个 VideoStreamDescriptor 对象,以提供有关要编码的视频轨道的信息。
有关在 UWP 应用中使用媒体流源的示例,请参阅 MediaStreamSource 示例 。
版本历史记录
Windows 版本 | SDK 版本 | 已添加值 |
---|---|---|
1709 | 16299 | Label |
1803 | 17134 | 复制 |
构造函数
VideoStreamDescriptor(VideoEncodingProperties) |
使用指定的 VideoEncodingProperties 创建 VideoStreamDescriptor 类的实例。 |
属性
EncodingProperties |
获取描述视频流的编码属性的 对象。 这些属性包括视频的分辨率和帧速率。 |
IsSelected |
获取一个值,该值指示流当前是否由 MediaStreamSource 使用。 |
Label |
获取或设置一个应用定义的标签,该标签标识包含多个流的 MediaEncodingProfile 中的视频流。 |
Language |
获取或设置流的 RFC-1766 语言代码。 |
Name |
获取或设置流的名称。 |
方法
Copy() |