Definition
VideoText editorial team. Updated September 13, 2026.
SCC (Scenarist Closed Caption) is a file format that stores CEA-608 caption data as hexadecimal byte pairs with timecodes. It is common in North American broadcast and finishing workflows.
The sections below explain how SCC is used in transcription and subtitle work, what people often mix up, and which VideoText workflow applies when the next step is a file or review pass.
Finishing tools encode pop-on or roll-up captions into 608 byte sequences. Players and broadcast encoders — not web <track> elements — are the usual consumers.
Scenarist Closed Captions is a broadcast format that encodes caption data as hexadecimal control and character codes, each block paired with an SMPTE timecode. It expresses the caption as instructions to a decoder rather than as readable text.
Those instructions include positioning, pop-on and roll-up behaviour, and styling, which is why SCC preserves presentation detail that a plain-text format such as SRT cannot represent.
It is tied to a frame rate and to the drop-frame convention of the material, so an SCC file delivered against the wrong rate drifts. A delivery specification will normally state both.
Converting SCC to a web format loses information: positioning and styling flatten, and the frame-accurate timecodes become decimal seconds. Converting the other way has to invent the detail SCC expects, so it rarely round-trips cleanly.