AWS::MediaConnect Construct Library

---

cdk-constructs: Experimental

The APIs of higher level constructs in this module are experimental and under active development. They are subject to non-backward compatible changes or removal in any future version. These are not subject to the Semantic Versioning model and breaking changes will be announced in the release notes. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

AWS Elemental MediaConnect

AWS Elemental MediaConnect is a high-quality transport service for live video. It provides the reliability and security of satellite and fiber-optic combined with the flexibility, agility, and economics of IP-based networks. MediaConnect enables you to build mission-critical live video workflows in a fraction of the time and cost of satellite or fiber services.

This package contains constructs for working with AWS Elemental MediaConnect, allowing you to define Flows, Bridges, Gateways, Router Inputs, Router Outputs, and Router Network Interfaces for transporting live video streams.

For further information on AWS Elemental MediaConnect, see the documentation.

Table of Contents

Router Resources

MediaConnect routers provide high-performance, low-latency video routing capabilities for building complex live video workflows. Router resources include network interfaces, inputs, and outputs.

How Router Resources Relate

Router resources work together in a pipeline:

A RouterNetworkInterface defines the network connectivity (public internet or VPC). Required for standard protocol-based inputs and outputs, but not needed when connecting to MediaLive inputs or MediaConnect flows directly.
A RouterInput is the entry point — it receives video from a source via a protocol (RTP, SRT, RIST), or from a MediaConnect flow.
A RouterOutput is the exit point — it sends video to a destination via a protocol, to a MediaLive input, or to a MediaConnect flow.

A typical camera-to-cloud workflow looks like:

Camera → RouterNetworkInterface → RouterInput (SRT) → [Router] → RouterOutput (MediaLive) → MediaLive Channel

The router sits in the middle, routing content from inputs to outputs. You can have many outputs per input — for example, one camera feed going to both a MediaLive channel and a MediaConnect flow simultaneously.

End-to-End Example: SRT Source to MediaLive

Here’s a complete example showing how to connect an SRT source through a router to MediaLive:

# stack: Stack
# media_live_input: medialive.CfnInput


# 1. A public network interface for the SRT input
network_interface = RouterNetworkInterface(stack, "NetworkInterface",
    router_network_interface_name="camera-network",
    configuration=RouterNetworkConfiguration.public_network(
        cidr=["203.0.113.0/24"]
    )
)

# 2. A router input receiving SRT from an upstream encoder
input = RouterInput(stack, "Input",
    router_input_name="camera-input",
    maximum_bitrate=Bitrate.mbps(10),
    routing_scope=RoutingScope.REGIONAL,
    tier=RouterInputTier.INPUT_20,
    configuration=RouterInputConfiguration.standard(
        network_interface=network_interface,
        protocol=RouterInputProtocol.srt_listener(
            port=9000,
            minimum_latency=Duration.millis(200)
        )
    )
)

# 3. A router output delivering to MediaLive
output = RouterOutput(stack, "Output",
    router_output_name="medialive-output",
    maximum_bitrate=Bitrate.mbps(10),
    routing_scope=RoutingScope.REGIONAL,
    tier=RouterOutputTier.OUTPUT_20,
    configuration=RouterOutputConfiguration.media_live_input(
        media_live_input_arn=media_live_input.attr_arn,
        media_live_pipeline_id=MediaLivePipeline.PIPELINE_0
    )
)

This gives you a complete pipeline: the encoder pushes SRT to the network interface, the router receives it as an input, and the router output delivers it to MediaLive. For routing rules — including how bitrate affects which outputs can receive which inputs — see the documentation.

Router Network Interfaces

Network interfaces define the network connectivity for router inputs and outputs:

Public Network Interface

# stack: Stack


public_interface = RouterNetworkInterface(stack, "PublicInterface",
    router_network_interface_name="public-interface",
    configuration=RouterNetworkConfiguration.public_network(
        cidr=["203.0.113.0/24"]
    )
)

Private Network Interface

# stack: Stack
# security_group: ec2.ISecurityGroup
# subnet: ec2.ISubnet


private_interface = RouterNetworkInterface(stack, "PrivateInterface",
    router_network_interface_name="private-interface",
    configuration=RouterNetworkConfiguration.vpc(
        security_groups=[security_group],
        subnet=subnet
    )
)

Router Inputs

Router inputs receive live video streams from various sources and make them available for routing:

Standard Input with RTP Protocol

# stack: Stack
# network_interface: RouterNetworkInterface


input = RouterInput(stack, "RtpInput",
    router_input_name="rtp-input",
    maximum_bitrate=Bitrate.mbps(10),
    routing_scope=RoutingScope.REGIONAL,
    # tier defaults to RouterInputTier.INPUT_20 (lowest cost)
    configuration=RouterInputConfiguration.standard(
        network_interface=network_interface,
        protocol=RouterInputProtocol.rtp(
            port=5000
        )
    )
)

Failover Input Configuration

# stack: Stack
# network_interface: RouterNetworkInterface


input = RouterInput(stack, "FailoverInput",
    router_input_name="failover-input",
    maximum_bitrate=Bitrate.mbps(10),
    routing_scope=RoutingScope.REGIONAL,
    tier=RouterInputTier.INPUT_50,
    configuration=RouterInputConfiguration.failover(
        network_interface=network_interface,
        protocols=[
            RouterInputProtocol.rist(
                port=5000,
                recovery_latency=Duration.millis(1000)
            ),
            RouterInputProtocol.rist(
                port=5002,  # Must not be consecutive with primary port
                recovery_latency=Duration.millis(1000)
            )
        ],
        source_priority=SourcePriorityConfig.primary_secondary(PrimarySource.FIRST_SOURCE)
    )
)

MediaConnect Flow Input

Connect a router input to an existing MediaConnect flow:

# stack: Stack
# flow: Flow
# flow_output: FlowOutput


input = RouterInput(stack, "FlowInput",
    router_input_name="flow-input",
    maximum_bitrate=Bitrate.mbps(20),
    routing_scope=RoutingScope.REGIONAL,
    tier=RouterInputTier.INPUT_50,
    configuration=RouterInputConfiguration.media_connect_flow(
        flow=flow,
        flow_output=flow_output
    )
)

Or prepare a router input for a flow connection without specifying the flow (requires explicit availability zone):

# stack: Stack


input = RouterInput(stack, "FlowInputNoConnection",
    router_input_name="flow-input-no-connection",
    maximum_bitrate=Bitrate.mbps(20),
    routing_scope=RoutingScope.REGIONAL,
    tier=RouterInputTier.INPUT_50,
    configuration=RouterInputConfiguration.media_connect_flow_without_connection(
        availability_zone="us-east-1a"
    )
)

Router Outputs

Router outputs send video streams to various destinations including standard protocols, MediaLive inputs, and MediaConnect flows:

Standard Output with SRT Protocol

# stack: Stack
# network_interface: RouterNetworkInterface


output = RouterOutput(stack, "SrtOutput",
    router_output_name="srt-output",
    maximum_bitrate=Bitrate.mbps(10),
    routing_scope=RoutingScope.REGIONAL,
    # tier defaults to RouterOutputTier.OUTPUT_20 (lowest cost)
    configuration=RouterOutputConfiguration.standard(
        protocol=RouterOutputProtocol.srt_listener(
            port=9001,
            minimum_latency=Duration.millis(200)
        ),
        network_interface=network_interface
    )
)

Note: The tier property defaults to the lowest (and cheapest) tier: INPUT_20 for Router Inputs and OUTPUT_20 for Router Outputs. The construct validates that maximumBitrate does not exceed the tier’s capacity (20, 50, or 100 Mbps) at synth time. Per the documentation, if an input is 20 Mbps you can’t route it to an output set up for less than 20 Mbps.

MediaLive Output

Note (breaking change in the future): MediaLive configuration is currently passed in as mediaLiveInputArn but when L2 construct available, this will be updated to use the construct instead.

Connect a router output to an existing MediaLive input:

# stack: Stack
# media_live_input: medialive.CfnInput


output = RouterOutput(stack, "MediaLiveOutput",
    router_output_name="medialive-output",
    maximum_bitrate=Bitrate.mbps(15),
    routing_scope=RoutingScope.GLOBAL,
    tier=RouterOutputTier.OUTPUT_50,
    configuration=RouterOutputConfiguration.media_live_input(
        media_live_input_arn=media_live_input.attr_arn,
        media_live_pipeline_id=MediaLivePipeline.PIPELINE_0
    )
)

Or prepare a router output for a MediaLive connection without specifying the input (requires explicit availability zone):

# stack: Stack


output = RouterOutput(stack, "MediaLiveOutputNoConnection",
    router_output_name="medialive-output-no-connection",
    maximum_bitrate=Bitrate.mbps(15),
    routing_scope=RoutingScope.GLOBAL,
    tier=RouterOutputTier.OUTPUT_50,
    configuration=RouterOutputConfiguration.media_live_input_without_connection(
        availability_zone="us-east-1a"
    )
)

MediaConnect Flow Output

Connect a router output to an existing MediaConnect flow:

# stack: Stack
# flow: Flow


output = RouterOutput(stack, "FlowOutput",
    router_output_name="flow-output",
    maximum_bitrate=Bitrate.mbps(20),
    routing_scope=RoutingScope.REGIONAL,
    tier=RouterOutputTier.OUTPUT_100,
    configuration=RouterOutputConfiguration.media_connect_flow(
        flow=flow
    )
)

Or prepare a router output for a flow connection without specifying the flow (requires explicit availability zone):

# stack: Stack


output = RouterOutput(stack, "FlowOutputNoConnection",
    router_output_name="flow-output-no-connection",
    maximum_bitrate=Bitrate.mbps(20),
    routing_scope=RoutingScope.REGIONAL,
    tier=RouterOutputTier.OUTPUT_100,
    configuration=RouterOutputConfiguration.media_connect_flow_without_connection(
        availability_zone="us-east-1a"
    )
)

Output with Encryption

from aws_cdk.aws_mediaconnect_alpha import RouterSrtEncryption
# stack: Stack
# network_interface: RouterNetworkInterface
# role: iam.IRole
# secret: secretsmanager.ISecret


output = RouterOutput(stack, "EncryptedOutput",
    router_output_name="encrypted-output",
    maximum_bitrate=Bitrate.mbps(10),
    routing_scope=RoutingScope.REGIONAL,
    tier=RouterOutputTier.OUTPUT_50,
    configuration=RouterOutputConfiguration.standard(
        protocol=RouterOutputProtocol.srt_caller(
            destination_address="203.0.113.100",
            destination_port=9001,
            minimum_latency=Duration.millis(200),
            encryption_configuration=RouterSrtEncryption(role=role, secret=secret)
        ),
        network_interface=network_interface
    )
)

Flows

A MediaConnect flow represents a transport stream connection between a source and one or more outputs. Flows are the primary resource for transporting live video content.

Creating a Flow

The following example creates a basic MediaConnect flow with an RTP source:

# stack: Stack


flow = Flow(stack, "MyFlow",
    flow_name="my-live-stream",
    source=SourceConfiguration.rtp(
        flow_source_name="my-source",
        port=5000,
        network=NetworkConfiguration.public_network("203.0.113.0/24")
    )
)

Flow Sources

MediaConnect supports multiple source types for ingesting content into a flow. The examples below use NetworkConfiguration.publicNetwork() for simplicity, but all protocol-based sources can also use NetworkConfiguration.vpc() with a VPC interface for private connectivity.

The source’s flowSourceName and description are set on the SourceConfiguration, not on FlowSourceProps. This is because the same SourceConfiguration is used both for a flow’s inline primary source (FlowProps.source, which has no separate props object) and for additional sources added via FlowSource. Keeping the name on the configuration lets both be described identically.

SRT Listener Source

SRT (Secure Reliable Transport) in listener mode configures MediaConnect to listen on a specific port for incoming content. The upstream device connects to MediaConnect as a caller.

# stack: Stack


flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.srt_listener(
        flow_source_name="live-encoder-source",
        description="Live encoder feed",
        port=5000,
        min_latency=Duration.millis(2000),
        network=NetworkConfiguration.public_network("203.0.113.0/24")
    )
)

SRT Caller Source

SRT in caller mode configures MediaConnect to connect to a remote SRT listener. Use this when the source device is listening for incoming connections rather than pushing content.

# stack: Stack


flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.srt_caller(
        flow_source_name="remote-source",
        source_listener_address="203.0.113.50",
        source_listener_port=5000,
        min_latency=Duration.millis(200)
    )
)

RTP Source

RTP (Real-time Transport Protocol) is a standard protocol for delivering audio and video over IP networks.

# stack: Stack


flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.rtp(
        flow_source_name="rtp-source",
        port=5000,
        network=NetworkConfiguration.public_network("203.0.113.0/24")
    )
)

RTP-FEC Source

RTP with Forward Error Correction adds redundancy to recover lost packets without retransmission. Use this when contributing via RTP and you need packet recovery.

# stack: Stack


flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.rtp_fec(
        flow_source_name="rtp-fec-source",
        port=5000,
        network=NetworkConfiguration.public_network("203.0.113.0/24")
    )
)

RIST Source

RIST (Reliable Internet Stream Transport) provides reliable video transport with packet recovery.

# stack: Stack


flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.rist(
        flow_source_name="rist-source",
        port=5000,
        max_latency=Duration.millis(2000),
        network=NetworkConfiguration.public_network("203.0.113.0/24")
    )
)

Zixi Push Source

Zixi Push uses the Zixi protocol for reliable video transport. Content is pushed to MediaConnect from a Zixi-compatible component upstream.

# stack: Stack


flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.zixi_push(
        flow_source_name="zixi-source",
        max_latency=Duration.millis(2000),
        network=NetworkConfiguration.public_network("203.0.113.0/24")
    )
)

Zixi Push ports are assigned by MediaConnect: 2088 for public sources, 2090-2099 for VPC sources. See Source port assignments.

Router Source

Use a router source when the flow’s source comes from a MediaConnect Router rather than a direct connection.

# stack: Stack


flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.router()
)

VPC Source

Use a VPC-based source when you need a connection between a flow and your Amazon VPC. This enables private connectivity for receiving content from on-premises equipment via AWS Direct Connect or VPN, or from other AWS services running in your VPC.

# stack: Stack
# security_group: ec2.ISecurityGroup
# subnet: ec2.ISubnet
# role: iam.IRole


vpc_interface = VpcInterface.define(
    vpc_interface_name="my-vpc-interface",
    role=role,
    security_groups=[security_group],
    subnet=subnet
)

flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.rist(
        flow_source_name="vpc-source",
        description="VPC-based source",
        port=5000,
        max_latency=Duration.millis(2000),
        network=NetworkConfiguration.vpc(vpc_interface)
    ),
    vpc_interfaces=[vpc_interface]
)

Entitled Source (From Another AWS Account)

Entitlements allow you to subscribe to content from another AWS account. The entitlement is created by the content originator in their AWS account, and you import it using the entitlement ARN they provide.

# stack: Stack


# Import an entitlement from another AWS account
entitlement = FlowEntitlement.from_flow_entitlement_arn(stack, "ImportedEntitlement", "arn:aws:mediaconnect:us-west-2:111122223333:entitlement:1-11111111111111111111111111111111:MyEntitlement")

flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.entitlement(
        entitlement=entitlement
    )
)

Gateway Bridge Source

Use a gateway bridge source when ingesting content from on-premises equipment through a MediaConnect gateway and bridge. Gateways define the network infrastructure that bridges use to transport video between on-premises and cloud environments.

# stack: Stack
# bridge: Bridge
# role: iam.IRole
# security_group: ec2.ISecurityGroup
# subnet: ec2.ISubnet


vpc_interface = VpcInterface.define(
    vpc_interface_name="bridge-interface",
    role=role,
    security_groups=[security_group],
    subnet=subnet
)

flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.gateway_bridge(
        bridge=bridge,
        vpc_interface=vpc_interface
    ),
    vpc_interfaces=[vpc_interface]
)

VPC Interfaces

VPC interfaces allow MediaConnect to send or receive content within your VPC. Create VPC interfaces using VpcInterface.define() and add them to the flow’s vpcInterfaces array. The same interface can then be referenced in sources and outputs:

# stack: Stack
# role: iam.IRole
# security_group: ec2.ISecurityGroup
# subnet: ec2.ISubnet


# Create VPC interface
vpc_interface = VpcInterface.define(
    vpc_interface_name="my-vpc-interface",
    role=role,
    security_groups=[security_group],
    subnet=subnet,
    network_interface_type=NetworkInterface.ENA
)

# Add to flow and reference in source
flow = Flow(stack, "MyFlow",
    vpc_interfaces=[vpc_interface],  # Declare at flow level
    source=SourceConfiguration.rist(
        flow_source_name="vpc-source",
        port=5000,
        max_latency=Duration.millis(2000),
        network=NetworkConfiguration.vpc(vpc_interface)
    )
)

CDI and JPEG XS with EFA Interfaces

For high-performance CDI or JPEG XS workflows, use EFA (Elastic Fabric Adapter) interfaces. Note that flows can have a maximum of 1 EFA interface:

from aws_cdk.aws_mediaconnect_alpha import FmtpVideo, MediaStreamSourceConfigurationCdi
# stack: Stack
# role: iam.IRole
# security_group: ec2.ISecurityGroup
# subnet: ec2.ISubnet


efa_interface = VpcInterface.define(
    vpc_interface_name="efa-interface",
    role=role,
    security_groups=[security_group],
    subnet=subnet,
    network_interface_type=NetworkInterface.EFA
)

video_stream = MediaStream.video(
    media_stream_id=1,
    media_stream_name="video",
    video_format=MediaVideoFormat.HD_1080P,
    fmtp=FmtpVideo(
        exact_framerate=Framerate.FPS_29_97,
        par=PixelAspectRatio.SQUARE
    )
)

flow = Flow(stack, "MyCdiFlow",
    flow_size=FlowSize.LARGE_4X,  # Required for CDI and JPEG XS
    vpc_interfaces=[efa_interface],
    media_streams=[video_stream],
    source=SourceConfiguration.cdi(
        flow_source_name="cdi-source",
        vpc_interface=efa_interface,
        port=5000,
        max_sync_buffer=100,
        media_stream_source_configurations=[MediaStreamSourceConfigurationCdi(
            encoding=Encoding.RAW,
            media_stream=video_stream
        )]
    )
)

JPEG XS with Redundant Interfaces

JPEG XS requires exactly 2 input interfaces per media stream for redundancy. Typically one EFA and one ENA interface:

from aws_cdk.aws_mediaconnect_alpha import FmtpVideo, MediaStreamSourceConfigurationJpegXs
# stack: Stack
# role: iam.IRole
# sg1: ec2.ISecurityGroup
# sg2: ec2.ISecurityGroup
# subnet: ec2.ISubnet


efa_interface = VpcInterface.define(
    vpc_interface_name="efa-interface",
    role=role,
    security_groups=[sg1],
    subnet=subnet,
    network_interface_type=NetworkInterface.EFA
)

ena_interface = VpcInterface.define(
    vpc_interface_name="ena-interface",
    role=role,
    security_groups=[sg2],
    subnet=subnet,
    network_interface_type=NetworkInterface.ENA
)

video_stream = MediaStream.video(
    media_stream_id=1,
    media_stream_name="video",
    video_format=MediaVideoFormat.UHD_2160P,
    fmtp=FmtpVideo(
        exact_framerate=Framerate.FPS_59_94,
        par=PixelAspectRatio.SQUARE,
        colorimetry=Colorimetry.BT2020,
        video_range=VideoRange.FULL,
        scan_mode=ScanMode.PROGRESSIVE,
        tcs=Tcs.PQ
    )
)

flow = Flow(stack, "MyJpegXsFlow",
    flow_size=FlowSize.LARGE_4X,  # Required for JPEG XS
    vpc_interfaces=[efa_interface, ena_interface],
    media_streams=[video_stream],
    source=SourceConfiguration.jpeg_xs(
        flow_source_name="jpegxs-source",
        max_sync_buffer=100,
        media_stream_source_configurations=[MediaStreamSourceConfigurationJpegXs(
            encoding=Encoding.JXSV,
            port=5000,
            input_interface=[efa_interface, ena_interface],  # 2 interfaces for redundancy
            media_stream=video_stream
        )]
    )
)

Media Streams

Media streams represent individual components of your content (video, audio, ancillary data) for ST 2110 JPEG XS or CDI workflows. Create media streams using the static factory methods and add them to the flow’s mediaStreams array:

from aws_cdk.aws_mediaconnect_alpha import FmtpVideo
# stack: Stack


# Create media streams
video_stream = MediaStream.video(
    media_stream_id=1,
    media_stream_name="video-stream",
    video_format=MediaVideoFormat.HD_1080P,
    fmtp=FmtpVideo(
        colorimetry=Colorimetry.BT709,
        exact_framerate=Framerate.FPS_29_97,
        par=PixelAspectRatio.SQUARE,
        video_range=VideoRange.NARROW,
        scan_mode=ScanMode.PROGRESSIVE,
        tcs=Tcs.SDR
    )
)

audio_stream = MediaStream.audio(
    media_stream_id=2,
    media_stream_name="audio-stream",
    channel_order=AudioStreamOrderOptions.STANDARD_STEREO
)

# Add to flow
flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.router(),
    media_streams=[video_stream, audio_stream]
)

Audio Channel Order

For audio media streams, use the AudioStreamOrderOptions enum to specify the SMPTE 2110-30 channel order:

# Available channel order options
AudioStreamOrderOptions.MONO # SMPTE2110.(M)
AudioStreamOrderOptions.DUAL_MONO # SMPTE2110.(DM)
AudioStreamOrderOptions.STANDARD_STEREO # SMPTE2110.(ST)
AudioStreamOrderOptions.LTRT_MATRIX_STEREO # SMPTE2110.(LtRt)
AudioStreamOrderOptions.SURROUND_5_1 # SMPTE2110.(51)
AudioStreamOrderOptions.SURROUND_7_1 # SMPTE2110.(71)
AudioStreamOrderOptions.SURROUND_22_2 # SMPTE2110.(222)
AudioStreamOrderOptions.ONE_SDI_AUDIO_GROUP # SMPTE2110.(SGRP)

# Example with 5.1 surround
surround_audio = MediaStream.audio(
    media_stream_id=3,
    media_stream_name="surround-audio",
    channel_order=AudioStreamOrderOptions.SURROUND_5_1
)

Media streams can be referenced in source configurations (for CDI and JPEG XS) and output configurations.

Flow Sizes

MediaConnect offers three flow sizes that determine feature support:

Flow Size	Transport Streams	NDI	CDI / JPEG XS
`MEDIUM` (default)	✅	❌	❌
`LARGE`	✅	✅	❌
`LARGE_4X`	❌	❌	✅

This table maps each FlowSize to the capabilities the construct validates. For output counts, throughput limits, and other per-size details, see Flow sizes and capabilities.

The construct validates flow size constraints at synthesis time based on the source protocol and NDI configuration:

MEDIUM supports transport stream protocols (RTP, SRT, RIST, etc.) but not NDI or CDI
LARGE supports transport streams and NDI, and is required when NDI is enabled
LARGE_4X is required for CDI and JPEG XS protocols, and does not support transport streams or NDI

These are mutually exclusive — CDI/JPEG XS and NDI cannot coexist on the same flow because they require different flow sizes.

from aws_cdk.aws_mediaconnect_alpha import NdiConfig, NdiDiscoveryServerConfig, EncodingConfig, MediaStreamSourceConfigurationCdi
# stack: Stack
# ndi_vpc_interface: VpcInterfaceConfig
# efa_interface: VpcInterfaceConfig
# video_stream: MediaStream


# NDI requires LARGE, an encoding profile, and at least one discovery server
Flow(stack, "NdiFlow",
    flow_size=FlowSize.LARGE,
    ndi_config=NdiConfig(
        ndi_state=State.ENABLED,
        ndi_discovery_servers=[NdiDiscoveryServerConfig(
            discovery_server_address="10.0.0.10",
            vpc_interface=ndi_vpc_interface
        )]
    ),
    encoding_config=EncodingConfig(
        encoding_profile=EncodingProfile.CONTRIBUTION_H264_DEFAULT
    ),
    source=SourceConfiguration.ndi(
        flow_source_name="ndi-source"
    )
)

# CDI and JPEG XS require LARGE_4X
Flow(stack, "CdiFlow",
    flow_size=FlowSize.LARGE_4X,
    vpc_interfaces=[efa_interface],
    media_streams=[video_stream],
    source=SourceConfiguration.cdi(
        flow_source_name="cdi-source",
        vpc_interface=efa_interface,
        port=5000,
        max_sync_buffer=100,
        media_stream_source_configurations=[MediaStreamSourceConfigurationCdi(
            encoding=Encoding.RAW,
            media_stream=video_stream
        )]
    )
)

For more information, see Flow sizes and capabilities.

Gateways

MediaConnect Gateways enable the deployment of on-premises resources for transporting live video to and from the AWS Cloud. Gateways are required for creating bridges.

Creating a Gateway

# stack: Stack


production_network = GatewayNetwork.define(
    cidr_block="192.168.1.0/24",
    name="production-network"
)

gateway = Gateway(stack, "MyGateway",
    gateway_name="my-gateway",
    egress_cidr_blocks=["10.0.0.0/16"],
    networks=[production_network]
)

Importing an Existing Gateway

# stack: Stack

gateway = Gateway.from_gateway_arn(stack, "ImportedGateway", "arn:aws:mediaconnect:us-west-2:123456789012:gateway:1-XXXXXX")

Bridges

MediaConnect bridges enable you to interconnect on-premises equipment with cloud-based workflows. Bridges support both ingress (on-premises to cloud) and egress (cloud to on-premises) scenarios.

Creating a Bridge

Ingress Bridge (On-premises to Cloud)

An ingress bridge receives content from on-premises equipment and makes it available in the cloud:

from aws_cdk.aws_mediaconnect_alpha import BridgeNetworkInput, BridgeNetworkSource
# stack: Stack


production_network = GatewayNetwork.define(
    cidr_block="192.168.1.0/24",
    name="production-network"
)

gateway = Gateway(stack, "MyGateway",
    gateway_name="my-gateway",
    egress_cidr_blocks=["10.0.0.0/16"],
    networks=[production_network]
)

ingress_bridge = Bridge(stack, "MyIngressBridge",
    bridge_name="my-ingress-bridge",
    config=BridgeConfiguration.ingress(
        max_bitrate=Bitrate.mbps(10),
        max_outputs=2,
        network_sources=[BridgeNetworkInput(
            name="on-prem-source",
            source=BridgeNetworkSource(
                protocol=BridgeProtocol.RTP,
                network=production_network,
                multicast_ip="239.1.1.1",
                port=5000
            )
        )]
    ),
    gateway=gateway
)

Egress Bridge (Cloud to On-premises)

An egress bridge sends content from MediaConnect flows to on-premises equipment:

from aws_cdk.aws_mediaconnect_alpha import BridgeFlowInput, BridgeFlowSource, BridgeNetworkOutput
# stack: Stack
# gateway: Gateway
# flow: Flow
# vpc_interface: VpcInterfaceConfig
# production_network: GatewayNetwork


egress_bridge = Bridge(stack, "MyEgressBridge",
    bridge_name="my-egress-bridge",
    config=BridgeConfiguration.egress(
        max_bitrate=Bitrate.mbps(10),
        flow_sources=[BridgeFlowInput(
            name="cloud-source",
            source=BridgeFlowSource(
                flow=flow,
                vpc_interface=vpc_interface
            )
        )],
        network_outputs=[BridgeNetworkOutput(
            name="on-prem-output",
            output=BridgeOutputConfiguration.network(
                ip_address="192.168.1.200",
                port=5001,
                network=production_network,
                protocol=BridgeProtocol.RTP,
                ttl=50
            )
        )]
    ),
    gateway=gateway
)

Bridge Sources

For failover scenarios, you can add additional sources to an existing bridge using the BridgeSource construct:

# stack: Stack
# bridge: Bridge
# flow: Flow


# Add a flow source to an egress bridge (requires failover to be enabled)
additional_source = BridgeSource(stack, "AdditionalSource",
    bridge_source_name="backup-source",
    bridge=bridge,
    source=BridgeSourceConfiguration.flow(
        flow=flow
    )
)

Bridge Outputs

Bridge outputs are configured as part of the bridge configuration for egress bridges. They define where content exits the bridge to on-premises equipment.

# production_network: GatewayNetwork


network_config = BridgeOutputConfiguration.network(
    ip_address="192.168.1.200",
    port=5001,
    network=production_network,
    protocol=BridgeProtocol.RTP,
    ttl=50
)

named_output = {"name": "on-prem-output", "output": network_config}

Encryption

MediaConnect supports encryption for sources, outputs, and entitlements. This package provides type-safe encryption configuration structs that match the encryption requirements for different protocols.

Encryption Types

MediaConnect supports two types of encryption:

Static Key Encryption - Used for Zixi Push/Pull protocols and entitlements
SRT Password Encryption - Used for SRT Listener and SRT Caller protocols

Note: CFN exposes only static-key and srt-password for flow output encryption today; SPEKE is not currently part of the surface.

Auto-created IAM role. Every encryption struct accepts an optional role. Omit it and the consuming construct creates a scoped role for you: trust policy for mediaconnect.amazonaws.com with aws:SourceAccount + aws:SourceArn conditions (confused-deputy protection), and just enough permission to read the provided secret (including kms:Decrypt when the secret uses a customer-managed KMS key).

Providing your own role. If you supply a role, it’s used as-is — the construct does not grant it any permissions. You must grant it the necessary permissions yourself. Provide your own role when you need stricter control or a shared identity.

Trust-policy scope: flows vs. routers. When the L2 auto-creates a role, it also pins aws:SourceArn to the consuming resource:

Flows — the trust policy pins the flow ARN (arn:...:flow:*:<flow-name>). The * wildcards the service-assigned id segment; the flow name is fixed at create time.
Routers — the trust policy can only pin a wildcarded ARN (arn:...:routerInput:* / arn:...:routerOutput:*). Router I/O ARNs use a service-generated id segment that is unknown at synth time, and using the live ARN attribute would create a CloudFormation dependency cycle (role → router → role). If you need per-resource pinning, supply your own role with a trust condition that pins the exact ARN — you can compute it from the resource’s routerInputId / routerOutputId after first deploy and apply it on a follow-up deploy.

Static Key Encryption

Use a static-key encryption struct for Zixi protocols and entitlements. This requires an encryption algorithm (AES128, AES192, or AES256). Pass it inline where the construct asks for it:

from aws_cdk.aws_mediaconnect_alpha import StaticKeyEncryption
# stack: Stack
# flow: Flow
# role: iam.IRole
# secret: secretsmanager.ISecret


FlowEntitlement(stack, "MyEntitlement",
    flow=flow,
    subscribers=["111122223333"],
    description="Grant partner access to live feed",
    encryption=StaticKeyEncryption(
        role=role,
        secret=secret,
        algorithm=EncryptionAlgorithm.AES256
    )
)

SRT Password Encryption

SRT protocols take an encryption struct with just role and secret — no algorithm:

from aws_cdk.aws_mediaconnect_alpha import SrtPasswordEncryption
# stack: Stack
# flow: Flow
# role: iam.IRole
# secret: secretsmanager.ISecret


FlowOutput(stack, "SrtOutput",
    flow=flow,
    output=OutputConfiguration.srt_caller(
        destination="203.0.113.100",
        port=7000,
        encryption=SrtPasswordEncryption(role=role, secret=secret)
    )
)

Using Encryption with Sources

Apply encryption when configuring flow sources:

from aws_cdk.aws_mediaconnect_alpha import SrtPasswordEncryption, StaticKeyEncryption
# stack: Stack
# role: iam.IRole
# secret: secretsmanager.ISecret


# SRT Listener source with encryption
flow = Flow(stack, "MyFlow",
    source=SourceConfiguration.srt_listener(
        flow_source_name="encrypted-source",
        port=5000,
        network=NetworkConfiguration.public_network("203.0.113.0/24"),
        decryption=SrtPasswordEncryption(role=role, secret=secret)
    )
)

# Zixi Push source with encryption
flow2 = Flow(stack, "MyFlow2",
    source=SourceConfiguration.zixi_push(
        flow_source_name="encrypted-zixi-source",
        max_latency=Duration.millis(2000),
        network=NetworkConfiguration.public_network("203.0.113.0/24"),
        decryption=StaticKeyEncryption(
            role=role,
            secret=secret,
            algorithm=EncryptionAlgorithm.AES256
        )
    )
)

Using Encryption with Outputs

Apply encryption when configuring flow outputs:

from aws_cdk.aws_mediaconnect_alpha import SrtPasswordEncryption
# stack: Stack
# flow: Flow
# role: iam.IRole
# secret: secretsmanager.ISecret


# SRT Caller output with encryption
output = FlowOutput(stack, "EncryptedOutput",
    flow=flow,
    description="Encrypted SRT output",
    output=OutputConfiguration.srt_caller(
        destination="203.0.113.100",
        port=7000,
        encryption=SrtPasswordEncryption(role=role, secret=secret)
    )
)

Using Encryption with Entitlements

Entitlements use static key encryption:

from aws_cdk.aws_mediaconnect_alpha import StaticKeyEncryption
# stack: Stack
# flow: Flow
# role: iam.IRole
# secret: secretsmanager.ISecret


entitlement = FlowEntitlement(stack, "MyEntitlement",
    flow=flow,
    description="Grant partner access to live feed",
    subscribers=["111122223333"],
    encryption=StaticKeyEncryption(
        role=role,
        secret=secret,
        algorithm=EncryptionAlgorithm.AES256
    )
)

Router Transit Encryption

When integrating flows with routers, use transit encryption to secure the connection between the flow and router:

from aws_cdk.aws_mediaconnect_alpha import TransitEncryption, TransitEncryption
# stack: Stack
# flow: Flow
# role: iam.IRole
# secret: secretsmanager.ISecret
# existing_router_output: RouterOutput


# Flow output to router with transit encryption
router_output = FlowOutput(stack, "RouterOutput",
    flow=flow,
    output=OutputConfiguration.router(
        encryption=TransitEncryption(role=role, secret=secret)
    )
)

# Flow source from router with transit encryption
flow_from_router = Flow(stack, "FlowFromRouter",
    source=SourceConfiguration.router(
        router_output=existing_router_output,
        decryption=TransitEncryption(role=role, secret=secret)
    )
)

Router SRT Encryption

Router outputs using SRT protocols use RouterSrtEncryption for encryption:

from aws_cdk.aws_mediaconnect_alpha import RouterSrtEncryption
# stack: Stack
# network_interface: RouterNetworkInterface
# role: iam.IRole
# secret: secretsmanager.ISecret


output = RouterOutput(stack, "EncryptedSrtOutput",
    router_output_name="encrypted-srt-output",
    maximum_bitrate=Bitrate.mbps(10),
    routing_scope=RoutingScope.REGIONAL,
    tier=RouterOutputTier.OUTPUT_50,
    configuration=RouterOutputConfiguration.standard(
        protocol=RouterOutputProtocol.srt_caller(
            destination_address="203.0.113.100",
            destination_port=9001,
            minimum_latency=Duration.millis(200),
            encryption_configuration=RouterSrtEncryption(role=role, secret=secret)
        ),
        network_interface=network_interface
    )
)

Note: RouterSrtEncryption is distinct from SrtPasswordEncryption (used on flow sources/outputs) — router outputs use a simpler CFN shape without a keyType discriminator.

CloudWatch Metrics

Flows and Bridges expose CloudWatch metric helpers for monitoring. You can create alarms and dashboards using these metrics:

# flow: Flow
# stack: Stack


# Create a CloudWatch alarm on source bitrate
alarm = flow.metric_source_bitrate().create_alarm(stack, "LowBitrate",
    threshold=1000000,
    evaluation_periods=1
)

# Monitor unrecovered packets
flow.metric_source_not_recovered_packets().create_alarm(stack, "PacketLoss",
    threshold=100,
    evaluation_periods=2
)

# Track total packets with custom options
total_packets = flow.metric_source_total_packets(
    statistic="sum",
    period=Duration.minutes(5)
)

Flow metrics

metricSourceBitrate() - Bitrate of content ingested into the flow (average)
metricSourceNotRecoveredPackets() - Packets lost in transit that were not recovered by error correction (sum)
metricSourceTotalPackets() - Total packets received by the flow sources (sum)
metricSourceSelected() - Indicates which source is being used under Failover mode (max; 1 = active, 0 = standby)
metricSourceConnected() - Source connection state for Zixi, SRT, and RIST (min; 1 = connected, 0 = disconnected)
metricSourceDisconnections() - Number of times the source transitioned from connected to disconnected (sum)
metricSourceDroppedPackets() - Packets lost before any error correction took place (sum)
metricSourcePacketLossPercent() - Percentage of packets lost during transit, even if they were recovered (average)
metricSourceRoundTripTime() - Round-trip time to the source for RIST, Zixi, and SRT (average, milliseconds)
metricSourceJitter() - Current network jitter of the source (average, milliseconds)
metric(metricName) - Create a custom metric by name

Bridge metrics

Bridge metrics are dimensioned by BridgeARN. The underlying CloudWatch metric name is chosen automatically based on whether the bridge is ingress or egress.

metricSourceBitrate(bridgeSourceName) - Bitrate of a specific bridge source (average)
metricSourcePacketLossPercent(bridgeSourceName) - Percentage of packets lost on a specific bridge source (average)
metricFailoverSwitches() - Total number of times the bridge switches between sources under FAILOVER failover mode (sum)
metric(metricName) - Create a custom metric by name

Router Input metrics

Router input metrics are dimensioned by RouterInputARN.

metricBitrate() - Bitrate of the router input’s payload (average)
metricNotRecoveredPackets() - Packets lost in transit that were not recovered by error correction (sum)
metricTotalPackets() - Total number of packets received by the router input (sum)
metricConnected() - Connection state for SRT sources (min; 1 = connected, 0 = disconnected)
metricContinuityCounterErrors() - Continuity counter errors in the transport stream (sum)
metricLatency() - Recovery latency of the input stream for RIST, SRT, and RTP-FEC (average, milliseconds)
metricFailoverSwitches() - Total times the router input switched sources under Failover mode (sum)
metric(metricName) - Create a custom metric by name

Router Output metrics

Router output metrics are dimensioned by RouterOutputARN.

metricBitrate() - Bitrate of the router output’s payload (average)
metricTotalPackets() - Total number of packets sent by the router output (sum)
metricConnected() - Connection state for SRT outputs (min; 1 = connected, 0 = disconnected)
metricArqRequests() - Retransmitted packets requested through ARQ for RIST and SRT outputs (sum)
metric(metricName) - Create a custom metric by name

Gateway metrics

Gateway metrics are dimensioned by GatewayARN. Pass extra dimensions such as NetworkName, InstanceId, or BridgeSourceName via props.dimensionsMap to narrow to a specific network, appliance, or bridge source.

metricEgressBridgeTotalPackets() - Total packets sent from egress bridges hosted on the gateway (sum)
metricEgressBridgeDroppedPackets() - Packets dropped by egress bridges hosted on the gateway (sum)
metricIngressBridgeTotalPackets() - Total packets received by ingress bridges hosted on the gateway (sum)
metricIngressBridgeDroppedPackets() - Packets dropped by ingress bridges hosted on the gateway (sum)
metric(metricName) - Create a custom metric by name (e.g. IngressBridgeBitRate, EgressBridgeBitRate, IngressBridgeSourcePacketLossPercent)

Pair the total + dropped helpers to build a dropped-packet percentage chart — for example, divide metricEgressBridgeDroppedPackets() by metricEgressBridgeTotalPackets() in a math expression.

All metrics support standard CloudWatch metric options for customizing period, statistic, and dimensions.

Public CIDR warnings

Several constructs accept CIDR ranges that determine who can contribute content or pull outputs. Passing an open range (0.0.0.0/0 or any /0 prefix) makes the resource reachable from anywhere on the public internet, which is rarely what you want. The module emits synthesis-time warnings when it detects an open range on:

GatewayProps.egressCidrBlocks
NetworkConfiguration.publicNetwork(cidr) used on flow sources
cidrAllowList on Zixi Push / Zixi Pull / SRT Listener flow outputs
RouterNetworkConfiguration.publicNetwork({ cidr })

Restrict each range to the narrowest set of addresses that actually need access.