styleControl

Controls the source of position and style information for the output captions. - "passthrough": Carry the caption position and style from the source captions. When the source captions are embedded, SCTE-20, or ancillary, the position and style are preserved exactly. When the source captions are another format, the position and any supported style are carried over. - "manual": Applies the specified styling and positioning. All other styling and positioning is given default values.