Your own live video

Send keyframes and captions from your own video pipeline to the Check API. Use entity type external:call. The same live video rules that run on Stream-hosted calls (stream:v1:call) run on these checks. Create those rules on Live video and audio.

1. Extract keyframes (images) and closed captions (text) in your pipeline.
2. Send them to Check with entity_type: "external:call".
3. Stream evaluates them against your keyframe and closed-caption rules.
4. A match sends moderation_rule.triggered and review_queue_item.new.

content_published_at is the time the frame or caption was produced. Stream stores it on the flag so a reviewer can line it up with your timeline.

Send a keyframe

const response = await client.moderation.check({
  entity_type: "external:call",
  entity_id: "my-room-12345",
  entity_creator_id: "user-abc",
  content_published_at: new Date(),
  moderation_payload: {
    images: ["https://your-cdn.com/keyframe-001.jpg"],
  },
});

Send a caption

const response = await client.moderation.check({
  entity_type: "external:call",
  entity_id: "my-room-12345",
  entity_creator_id: "user-abc",
  content_published_at: new Date(),
  moderation_payload: {
    texts: ["transcribed audio segment"],
  },
});

Handling actions

Stream does not join your video session, so it cannot mute, blur, or kick a participant. Use flag_content or webhook_only on the rule, and enforce the decision on your own infrastructure when the webhook arrives.