# Metadata that MediaLive can extract
<a name="smpte-23038-supported-metadata"></a>

MediaLive can extract the following data from a SMPTE 2038 stream that is in the source.

**Captions**
+ ARIB captions – Captions that are compliant with ARIB STD-B37 version 2.4.
+ Embedded captions – Captions carried as ancillary captions that are compliant with SMPTE 334. The ancillary captions themselves must be compliant with EIA-608 standard (also known as CEA-608 or “line 21 captions”) or CEA-708 standard (also known as EIA-708).
+ Teletext captions – OP47 teletext format, also known as SMPTE RDD-08 (compliant with ITU-R BT.1120-7).

**Timecode**
+ Timecode – A SMPTE 12M timecode. MediaLive recognizes this timecode as an embedded timecode source.

**Ad avail messages**
+ SCTE 104 messages.

**Metadata**
+ KLV metadata – Data that is compliant with SMPTE 336M-2007.