MxlInputSettings.vancSubtitles property

Which subtitle codec to decode from ancillary (video/smpte291) data flows in the domain: OP-47 teletext, CTA-708 or CTA-608 (via SMPTE 334 CDP). Decoded subtitles are emitted as a subtitle stream, exactly as the ST 2110-40 and DeckLink inputs do. Default "none".

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