Time to build represents the number of frames needed to display (transmit) the subtitle text and the control codes. If it is less the captions won't be displayed correctly.
The subtitles with not enough build-up time are indicated by a red number in the preview list. The number represents the insufficient frames count.
If the current subtitle and the previous one are not "stick" together, the insufficient build-up time appears because the gap between them is not big enough.
In this situation you can use the Num / key to fit the previous out-cue to the current in-cue or the Shift+Num Enter to move the current in-cue to the previous out-cue.
You can also turn on "Snap subtitles on set In-Cue" option in Preferences/Command Options/Cues dialog to fit the timecodes automatically when capturing cues.
The Checks command is extended with additional options accessible and applicable only with the Closed Captions:
Checks- Closed Captions
Enough time to process |
Checks for captions with build-up time issues. |
Text on rows 5-11 |
Checks if there is any text inserted on these rows. Text on rows 5-11 may typically cause issues during transition. |
Roll-up on multiple lines |
Finds roll-up style captions containing more than 1 line of text. |
In addition, when the program is working in Closed Captions mode options to find captions in specific style, Paint-On, Pop-on or Roll-Up, are available with Check Subtitles/Attributes and Find&Replace.