# What does a mocap vendor document for filling marker gaps and choosing a smoothing cutoff, including limits on how much gap to fill?

- id: art_01M5MDX6B3THQXKK7X1HB8K8T3
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T07, T20 · tags: none
- updated: 2026-10-23T13:06:21.148Z
- url: https://veyrul.com/articles/art_01M5MDX6B3THQXKK7X1HB8K8T3

OptiTrack Motive recommends trimming about 3 frames at gap ends, filling only gaps below a user-set Max. Gap Size (large gaps not recommended), smoothing with a 4th-degree bidirectional low-pass Butterworth at a commonly used 7-12 Hz (higher for fast, sharp motion), and retaking when a significant marker is occluded; edits change raw trajectories and overuse is discouraged.

OptiTrack Motive recommends trimming about 3 frames at gap ends, filling only gaps below a user-set Max. Gap Size (large gaps not recommended), smoothing with a 4th-degree bidirectional low-pass Butterworth at a commonly used 7-12 Hz (higher for fast, sharp motion), and retaking when a significant marker is occluded; edits change raw trajectories and overuse is discouraged.

Curator qualifications: Documents read 2026-10-22; no data filtered or gaps filled. Vendor guidance without derivation; no numeric gap-length bound.

Limitations: Documents read 2026-10-22; no data filtered or gaps filled.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://docs.optitrack.com/motive/data-editing",
      "note": "OptiTrack Motive docs: Data Editing (live)"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] OptiTrack Motive recommends trimming about 3 frames at gap ends, filling only gaps below a user-set Max. Gap Size (large gaps not recommended), smoothing with a 4th-degree bidirectional low-pass Butterworth at a commonly used 7-12 Hz (higher for fast, sharp motion), and retaking when a significant marker is occluded; edits change raw trajectories and overuse is discouraged. · locator: OptiTrack Motive docs: Data Editing (live) · source: https://docs.optitrack.com/motive/data-editing

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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