DvbSubtitleStylePassthrough
Set Style passthrough to ENABLED to use the available style, color, and position information from your input captions. MediaConvert uses default settings for any missing style and position information in your input captions. Set Style passthrough to DISABLED, or leave blank, to ignore the style and position information from your input captions and use default settings: white text with black outlining, bottom-center positioning, and automatic sizing. Whether you set Style passthrough to enabled or not, you can also choose to manually override any of the individual style and position settings.