Channel

Source: src/AWS/MediaLive/Channel.ts

An AWS Elemental MediaLive channel — the live encoder that reads from attached inputs, transcodes per its encoder settings, and writes to output destinations (HLS, RTMP, MediaPackage, …).

Channels bill per running hour; Alchemy provisions channels in the IDLE state and never starts them — start/stop is a runtime operation.

Creating a Channel

Single-pipeline HLS channel

const channel = yield* MediaLive.Channel("Live", {
  channelClass: "SINGLE_PIPELINE",
  roleArn: role.roleArn,
  inputAttachments: [
    { InputId: input.inputId, InputAttachmentName: "primary" },
  ],
  inputSpecification: {
    Codec: "AVC",
    Resolution: "SD",
    MaximumBitrate: "MAX_10_MBPS",
  },
  destinations,
  encoderSettings,
});

IAM role for MediaLive

const role = yield* IAM.Role("MediaLiveRole", {
  assumeRolePolicyDocument: {
    Version: "2012-10-17",
    Statement: [
      {
        Effect: "Allow",
        Principal: { Service: "medialive.amazonaws.com" },
        Action: ["sts:AssumeRole"],
      },
    ],
  },
});