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# kCMSampleAttachmentKey_SMPTE_ST_2094_50Data

```
let kCMSampleAttachmentKey_SMPTE_ST_2094_50Data: CFString
```

## Discussion

\abstract SMPTE ST 2094-50 per frame metadata
\discussion The attachment is CFData containing SMPTE ST 2094-50 metadata (SMPTE ST 2094-50:2026-08 — Dynamic Metadata for Color Volume Transform — Application #5). This attachment will override any SMPTE ST 2094-50 metadata stored within the compressed data. The data shall start with the field smpte_st_2094_50_application_info. Annex C, Section C.2.1 Table C.1

---

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