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FaceTime Video can carry audio and video in both directions. Agent video and caller-camera capture are separate capabilities: enabling video does not automatically enable caller capture. FaceTime Audio carries audio only.
Outbound BYOR supports audio and video on enabled, ready lines. Use media: { audio: true, video: true } with the same POST /api/v1/calls endpoint; the selected line must be enabled and ready for outbound video. See Outbound.

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Media comparison

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Practical guidance

For coaching and movement analysis, connect the caller’s video frames to your own vision pipeline. Media transport supplies the track; your agent supplies the perception and coaching behavior. Use BYOR with your own agent, even when Chert operates the FaceTime line.
  • Keep greetings concise. For outbound, wait for bridge_ready or the corresponding outbound call.started notification before speaking.
  • Inbound audio and video can use either the incoming-decision webhook or the CLI (chert dev or chert byor). Video does not require a webhook. Outbound audio and video start with an API request.
  • During design-partner rollout, call.incoming includes media, allowing different accept or decline logic by call type.
For BYOR, subscribe to the bridge participant’s facetime-remote-audio and facetime-remote-video tracks. Handle camera mute and track changes throughout the call.

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Caller capture and presentation

Confirm caller capture is enabled for the assigned line before building a vision workflow. Depending on its configured profile, capture may include the FaceTime window’s controls, names, or self-preview; it is not always a raw camera feed. Camera mute, lost capture, or a missing track must not be treated as a current image. Validate changing frames at your agent and at the recipient independently. Per-line presentation includes Fit/Fill framing, holding-screen appearance, and handoff when audio or video is ready. Available settings depend on the line; saving one does not prove that a current call has adopted it. See Feature availability for other media capabilities.