配额和限制Quotas and limitations

本文枚举了 IoT Edge 上的实时视频分析模块的配额和限制。This article enumerates the quotas and limitations of the Live Video Analytics on IoT Edge module.

在已断开连接的情况下使用的最长期限Maximum period of disconnected use

边缘模块可承受 Internet 连接暂时断开的情况。The edge module can sustain temporary loss of internet connectivity. 如果模块断开连接的时间超过 36 小时,它将停用所有正在运行的图形实例,If the module remains disconnected for more than 36 hours, it will deactivate any graph instances that were running. 并将阻止所有进一步的直接方法调用。All further direct method calls will be blocked.

若要将边缘模块恢复到操作状态,必须还原 Internet 连接,使此模块能够与 Azure 媒体服务帐户成功通信。To resume the edge module to an operational state, you will have to restore the internet connectivity so that the module is able to successfully communicate with the Azure Media Service account.

图形实例的最大数量Maximum number of graph instances

每个模块最多可有 1000 个图形实例(通过 GraphInstanceSet 创建)。At most 1000 graph instances per module (created via GraphInstanceSet) are supported.

图形拓扑的最大数量Maximum number of graph topologies

每个模块最多可有 50 个图形拓扑(通过 GraphTopologySet 创建)。At most 50 graph topologies per module (created via GraphTopologySet) are supported.

预览版图形拓扑的限制Limitations on graph topologies at preview

在预览版本中,对于可以在一个媒体图拓扑中连接在一起的不同节点,存在一些限制。With the preview release, there are limitations on different nodes can be connected together in a media graph topology.

  • RTSP 源RTSP source
    • 每个图形拓扑仅允许有一个 RTSP 源。Only one RTSP source is allowed per graph topology.
  • 运动检测处理器Motion detection processor
    • 必须立即成为 RTSP 源中的下游。Must be immediately downstream from RTSP source.
    • 不能是 HTTP 或 gRPC 扩展处理器使用的下游。Cannot be used downstream of an HTTP or a gRPC extension processor.
  • 信号门处理器Signal gate processor
    • 必须立即成为 RTSP 源中的下游。Must be immediately downstream from RTSP source.
  • 资产接收器Asset sink
    • 必须立即成为 RTSP 源或信号门处理器中的下游。Must be immediately downstream from RTSP source or signal gate processor.
  • 文件接收器File sink
    • 必须立即成为信号门处理器中的下游。Must be immediately downstream from signal gate processor.
    • 不能立即成为 HTTP 或 gRPC 扩展处理器或运动检测处理器的下游Cannot be immediately downstream of an HTTP or a gRPC extension processor or motion detection processor
  • IoT 中心接收器IoT Hub Sink
    • 不能立即成为 IoT 中心源的下游。Cannot be immediately downstream of an IoT Hub Source.

预览版中媒体服务操作的限制Limitations on Media Service operations at preview

预览版发布时,IoT Edge 上的实时视频分析不支持以下功能:At the time of the preview release, the Live Video Analytics on IoT Edge does not support the following:

  • 能够在不中断的情况下将媒体服务帐户从一个订阅迁移到另一个订阅。The ability to migrate the Media Service account from one subscription to another without an interruption.
  • 能够将多个存储帐户用于媒体服务帐户。The ability to use more than one Storage account with the Media Service account.
  • 能够在不重启的情况下动态更改模块所需属性中的服务主体信息。The ability to change the service principal information in the desired properties of the module dynamically, without a restart.

只能使用支持 RTSP 协议的 IP 相机。You can only use IP Cameras that support RTSP protocol. 可以在 ONVIF 一致性产品页上找到支持 RTSP 的 IP 相机。You can find IP cameras that support RTSP on the ONVIF conformant products page. 查找符合配置文件 G、S 或 T 的设备。Look for devices that conform with profiles G, S, or T.

此外,还应将这些相机配置为使用 H.264 视频和 AAC 音频。Further, you should configure these cameras to use H.264 video and AAC audio. 当前不支持其他编解码器。Other codecs are currently not supported.

后续步骤Next steps

概述Overview