Friday, January 16, 2026

[Avid-L2] Closed Captions

Hi guys n gals,

I've never played with CC before but I think I'm okay now with generating them on the timeline. My question is on export. If I simply use my standard MXF file output template do I need to set anything else in order to have the TX file comply with the following specs? Thanks in advance.

Cheers,
Tony

Subtitle captions are required to be OP-47 compliant within the MXF file according to SMPTE ST 436-1 for VANC data.

The subtitles are required to be on Line 12 / Field 2 (577) / Teletext PAGE 888 and should not be present in the first or last 5 frames of the commercial. 

Packet31 test data and dummy headers should not be present.


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