The timestamp in nanoseconds of the frame the given TrackData was recorded on.
If frames are skipped during playback, the played back external track data may be attached to a later frame. This timestamp is equal to the result of UnityEngine.XR.ARSubsystems.XRCameraFrame.timestampNs on the frame during which track data was written.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-14 UTC."],[[["\u003cp\u003e\u003ccode\u003eTrackData\u003c/code\u003e stores externally recorded data associated with an AR Track, retrieved using \u003ccode\u003eARPlaybackManager.GetUpdatedTrackData\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eIt includes the raw byte data (\u003ccode\u003eData\u003c/code\u003e) recorded using \u003ccode\u003eARRecordingManager.RecordTrackData\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eIt also provides the frame timestamp (\u003ccode\u003eFrameTimestamp\u003c/code\u003e) indicating when the data was recorded, potentially subject to playback adjustments.\u003c/p\u003e\n"]]],["`TrackData`, recorded externally, is accessible via `ARPlaybackManager.GetUpdatedTrackData`. It contains two key attributes: `Data`, a byte array recorded through `ARRecordingManager.RecordTrackData`, and `FrameTimestamp`, the nanosecond timestamp of the frame when the `TrackData` was recorded. If frames are skipped, track data might be associated with a later frame; the timestamp aligns with `XRCameraFrame.timestampNs` of the recording frame.\n"],null,[]]
