maxAncDataSize

Specify a value for this setting only for outputs that you set up with one of these two XAVC profiles: XAVC HD Intra CBG or XAVC 4K Intra CBG. Specify the amount of space in each frame that the service reserves for ancillary data, such as teletext captions. The default value for this setting is 1492 bytes per frame. This should be sufficient to prevent overflow unless you have multiple pages of teletext captions data. If you have a large amount of teletext data, specify a larger number.