# Mux: Major incident: video clips audio loss

**Summary:** Mux Video - VOD had major audio loss affecting some clips using "basic" or "premium" video\_quality, caused by an encoding-change metadata mismatch. It started 2026-03-06 22:57 UTC and was resolved 2026-03-07 01:57 UTC (3 h 0 min); new clips work, but affected clips require re-creation from original assets to restore audio. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-03-06 22:57 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/15w844syqbmf](https://stspg.io/15w844syqbmf)
- [Company: Mux](https://rewindex.com/company/mux.md)
- Versions: before (none: first archived) → after incident\_version:197/pm047gz5hl6q@308eb9cb0ed2
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ video clips audio loss
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-03-06 22:57 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-03-07 01:57 UTC
```

**6. Added: Affected components**

```diff
+ Mux Video - VOD
```

**7. Added: Update** (identified) · 2026-03-06 22:57 UTC

```diff
+ A recent encoding change caused a mismatch in initialization metadata for some clips that were created in the last 24 hours. This would affect clips of assets created before Thursday, March 6 — 15:11 UTC that utilized "basic" or "premium" video_quality. A fix is currently being worked on.
```

**8. Added: Update** (resolved) · 2026-03-07 01:57 UTC

```diff
+ Engineers have resolved the issue with clips not having audio. Any new clips will function as expected. Impacted clips created during the incident window are not retroactively corrected, but can be re-created from the original asset.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-03-06 22:57 UTC | Major incident: video clips audio loss (this change) | outage |

All Mux changes: [timeline](https://rewindex.com/company/mux/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/i4ca567a0af491a · Markdown: https://rewindex.com/change/i4ca567a0af491a.md · JSON: https://rewindex.com/api/v1/changes/i4ca567a0af491a · Generated 2026-10-18T03:33:50.299Z