ImmersiveMediaRemotePreviewSender — "supportsMVHEVCEncode=0 / Failed to create ▎ immersive video rules" on M3, despite VTIsStereoMVHEVCEncodeSupported() == true

Media Technologies Video
Mattfisher47 OP
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TLS + connectReceiver connect successfully, but the sender fails to negotiate the immersive video stream: VCVideoRuleCollectionsImmersiveVideoMac initSupportedPayloads: Empty supported payload: supportsMVHEVCEncode=0 Failed to create immersive video rules! AVCMediaStreamNegotiator … Failed to init … for mode=15 hardwareSettingsModeFromFeatureListStringType: Unexpected featureListStringType=0 connectReceiver failed … GKVoiceChatServiceErrorDomain 32032 Host: MacBook Pro M3 (Mac15,3), macOS 26/27. VTIsStereoMVHEVCEncodeSupported() returns true, and I set preferredVideoWidth/Height/FrameRate. Is immersive MV-HEVC encode in this API gated by an entitlement, a specific M-series tier (Pro/Max), or a known beta issue? What populates the "immersive video rules" feature list?

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ImmersiveMediaRemotePreviewSender — "supportsMVHEVCEncode=0 / Failed to create ▎ immersive video rules" on M3, despite VTIsStereoMVHEVCEncodeSupported() == true
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