Mode

With the Mode section you can choose to prepare the subtitles for the Closed Captions CEA 608, TeleCap I or TeleCap II modes. Differences between these modes are described in the Project Settings section.

Channel

Depending on your choice for Channel, the prepared subtitle file will be inserted in one of the four data channels associated with Closed Captions: CC1 and CC2 in Field 1, CC3 and CC4 in Field 4.

Export in uppercase (alternative charset)

Changes all letters in the output file to UPPERCASE.

Double Control Codes

Control Codes are duplicated for ensure correct transmission.

Interleave CC data for 23.976fps video to maintain 30/1.001 pairs per second

Changes how caption's timings are calculated for 23.976fps in accordance with the CEA-708-B standard.

When the option is turned on, 3 pairs of CC data will be encoded for every other frame. And when it's turned off - 2 pairs of CC data will be encoded for every video frame. Or in other words, turning the option on allows 25% more text to be decoded over the same period of time which also accounts for decreasing the "time to process" required for each caption.

Note: This option is available only when the project is configured for 23.976fps. Whether it's clicked on or off by default depends on how the same option is configured at the Project Settings/Safe Area menu. We don't recommend turning the option on when it isn't turned on in the Project Settings. And vise-versa.!

Export Extended Character Set

Enables the use of characters from the Line 21 extended character list set.

Appropriate error message will be displayed on export if there were extended characters but the option wasn't switched on.

Blank between pop-ons

Blank between pop-ons serve the same purpose as min. interval between subtitles. 2 frames is the default value.

QuickTime compatible SCC

The output caption file could be played under Mac OS via QuickTime player with ClosedCaptionImporter filter installed. Please note, that if you are producing 23.976fps SCC files, you shall make sure that either 30fps Drop or Non-Drop has been selected from the Timecode Format drop-down.

Custom Frame Separator

Enables you to specify custom symbol to separate frames from seconds of the timecode in the output file. Colon (:) is used as the default symbol.

Erase Display Memory on Programme Start

Enables insertion of Erase Display Memory (EDM) control code at the selected Programme Start Timecode(see below). This may be needed by certain equipment and applications, like QuickTime, to correctly keep Closed Captions data in sync with the video playback.

Programme Start Timecode

Allows you to Recut/Offset the subtitles during the export. From the drop-down menu you can choose between the following options:

Manual - allows you manually specify video's timecode.

Auto - automatically sets the timecode according to the first subtitle's In-cue rounded down to the closes hour. For example, if the first subtitle originally starts at 01:00:32:21, video's timecode will be set to 01:00:00:00.

Programme Start TC - automatically subtracts the value of the Programme Start TimeCode metadata parameter if available in the input file. Note that this parameter is supported for EBU STL, EBU-TT, EZT or EZTXML file formats only.

Video Start TC - automatically gets video's start time from the input EZT or EZTXML file and uses it to recut/offset the subtitles.

Export Zero Subtitle

Adds the  Zero Subtitle to the exported file.