AncillaryTimecodeSettings
SMPTE ST 12-2 ancillary timecode (ATC) an output writes for every video frame. A frame that carries its own timecode (SEI, VITC, a received ATC) keeps it, in its own drop-frame counting; a frame between two that do is counted on from the last; any other frame takes its UTC time of day, shifted by utc_offset_minutes.
Field |
Type |
Repeated |
Description |
utc_offset_minutes |
Shifts time-of-day timecode, for a facility that runs local time. |
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label |
The payload type the packets declare (DBB1). |
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drop_frame |
Drop-frame counting for time-of-day timecode at 29.97 and 59.94 fps; the default there is drop-frame. Ignored at other rates, and for a source’s own timecode. |
Member of
Message |
Description |
ST 2110-40 ancillary sender. Transports SMPTE 291 VANC packets
(CCs, SCTE-104 splice commands, AFD, timecode, etc.) at the
paired video session’s frame rate. Wire SDP advertises
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