In Final Cut Pro for Mac, split a subtitle cue at a chosen time with the Blade tool, then edit each piece’s text. Use Split Captions when you have already put each intended cue on its own text line. Both workflows need a timing check against the audio and picture.

This guide is for a Mac editor turning existing timed captions into sentence-sized cues and aligning selected cue changes with picture cuts. The worked example uses synthetic software-demo narration and an SRT deliverable. Apple documents cutting and line-based splitting, but does not describe either operation as automatically finding sentence endings or choosing picture-cut boundaries. Adjust and arrange closed captions in Final Cut Pro for Mac.

Start with editable caption cues

Check what kind of text you have in the timeline. Apple’s current Generate Captions workflow can create subtitles as standard title clips. Its documented automatic-generation requirements are a Mac with Apple silicon and U.S. English speech. Those generated titles belong to a different workflow from the format-specific closed captions used below. Generate subtitles automatically in Final Cut Pro for Mac.

For a separate subtitle file, work with a caption role in the required format. Final Cut Pro supports SRT, iTT and CEA-608 closed captions. SRT and iTT can be imported and exported as separate files; Apple distinguishes these from CEA-608 captions, which can also be embedded in supported output media. This tutorial uses SRT so the final cue structure is easy to inspect as text. Intro to captions in Final Cut Pro for Mac.

If your captions are already present, continue with them. To import an existing file:

  1. Open the video project.
  2. Choose File > Import > Closed Captions and select the file.
  3. Under Import as Role, choose the caption role and language subrole.
  4. Set Insertion Time to match the file’s time reference, then click Import.

Apple accepts .srt, .itt and .scc files through this command. Import closed captions into Final Cut Pro for Mac.

The insertion-time choice matters when the project starts at a nonzero timecode. Relative to Timeline adds the project start time to each imported cue’s time; Absolute uses the file’s times directly. For example, a cue at two seconds in a file timed from the beginning of the exported movie normally calls for relative placement in a project whose timecode begins at one hour. Confirm the first cue against the audio before splitting anything. Import closed captions into Final Cut Pro for Mac.

Choose the boundary before choosing the tool

A sentence boundary answers “Where should this text finish?” A picture cut answers “Where does the displayed image change?” They may coincide, but a screen recording can switch from a toolbar to a canvas while the narration continues through the same sentence.

Use the following as an editorial decision aid, rather than a subtitle-format requirement. The aim is to make each cue understandable while keeping its words aligned with the demonstration.

Situation Suggested decision What to check
A sentence finishes as the picture cuts Use that shared point as the cue boundary The next cue introduces the next sentence
A sentence finishes before the picture cuts Keep the sentence boundary tied to the narration Do not stretch text solely to reach the cut
A picture cut falls between two complete phrases Consider splitting at the cut Each phrase still makes sense on its own
A picture cut falls inside a short phrase Consider retaining the cue across the cut A forced split would not improve understanding
Every cue must stay within a shot Split at the cut, then distribute the text carefully No isolated word flashes too briefly to read

For the examples below, imagine a demo that says: “Open the color panel. Choose the blue swatch.” The picture changes from the toolbar to the color panel between those sentences. This is a straightforward shared boundary. If the picture instead changes halfway through “Choose the blue swatch,” the sentence and shot require separate decisions.

Split at an exact sentence ending or picture cut

Use this route when the time boundary is the main requirement. First locate the intended frame. With timeline focus, Up Arrow and Down Arrow navigate to previous and next edit points; Left Arrow and Right Arrow step one frame at a time. Confirm the visible change in the viewer, particularly when the timeline contains several layers of edits. Navigate your project in Final Cut Pro for Mac.

Enable View > Snapping, or press N. Snapping works with the Blade tool and can target clip boundaries, the playhead and markers. Position the blade over the caption at the chosen point, checking that it aligns with the intended cut rather than a nearby snapping target. Snap to items in the timeline in Final Cut Pro for Mac.

Cut the caption clip with the Blade tool. Apple explicitly supports cutting closed captions at any point. If an existing cue boundary only needs moving, drag its start or end; for two adjacent captions, the Trim tool also supports a roll edit. Adjust and arrange closed captions in Final Cut Pro for Mac.

Next inspect both pieces and assign the intended words to each. Double-click a caption to open its editor, or select it and use the inspector’s Caption Text field. For the shared-boundary example, the first piece should contain “Open the color panel.” and the second “Choose the blue swatch.” Check explicitly for duplicated or missing words after the cut. Apple documents text insertion, deletion, copying and pasting in these editors. Edit closed caption text in Final Cut Pro for Mac.

Play from before the first cue until after the second. Listen for whether each instruction appears with its narration, and watch whether the cue change lands on the intended picture transition. A cut in the timeline establishes a time boundary; the text-editing pass establishes what each interval communicates.

Split a multi-sentence cue using explicit line breaks

For text-first editing, double-click the caption and press Return between the intended cues. For this example, make the original caption exactly two lines. An automatic visual wrap should not be your cue plan: insert the break deliberately in the editable text. Apple documents Return as the command for adding a new line. Edit closed caption text in Final Cut Pro for Mac.

Open the color panel.
Choose the blue swatch.

Select that caption, then choose Edit > Closed Captions > Split Captions, or press Control-Option-Command-C. Final Cut Pro replaces it with consecutive single-line captions, preserving the original total duration. The split follows text lines, so punctuation alone is insufficient. Adjust the resulting boundary against the narration and desired picture cut. Adjust and arrange closed captions in Final Cut Pro for Mac.

This route is useful when one existing cue contains several instructions and you want to distribute its text before refining the timing. Avoid applying it indiscriminately to all multiline captions: a two-line display may already be one coherent cue, and splitting every line would change its intended presentation.

Worked example: turn one SRT cue into two

Assume, purely for illustration, that the original cue runs from two to eight seconds, the first sentence ends at five seconds, and the picture cuts at exactly five seconds. These are invented example timings, not measured results or recommended universal durations.

The original SRT entry is:

1
00:00:02,000 --> 00:00:08,000
Open the color panel. Choose the blue swatch.

The intended result is:

1
00:00:02,000 --> 00:00:05,000
Open the color panel.

2
00:00:05,000 --> 00:00:08,000
Choose the blue swatch.

SRT entries contain a sequence number, start and end timestamps, subtitle text, and a separating blank line. Adding a line break inside the text does not create a second timed entry; the second cue needs its own timing block. The example follows the structure documented by the Matroska project. Subtitle Codecs.

The timing check is simple: the original interval is six seconds; the two replacement intervals are three seconds each. Their outer endpoints remain unchanged, and the internal boundary is five seconds. In Final Cut Pro, verify the corresponding frame in the viewer. SRT expresses milliseconds, whereas the timeline navigation used above steps through video frames.

If the second sentence actually starts at 5.6 seconds, reconsider the example’s shared boundary. You might end the first cue at the picture cut and start the second with the next instruction, leaving a gap. The useful test is whether each cue matches the demonstrated action and spoken words—not whether the original interval remains continuously filled.

Validate and export the edited cues

Inspect captions that turn red and read the inspector’s validation message. Apple documents SRT warnings for overlapping cues and multiple adjacent line breaks. Remove unintended overlap and extra blank lines within a cue. Other formats have additional constraints: CEA-608 can report timing errors even where a simple SRT arrangement looks reasonable. About Final Cut Pro caption validation.

Validation checks format constraints; your playback check still needs to catch missing words, awkward phrase divisions and cue changes on the wrong shot. Review each edited boundary with a little surrounding playback, then inspect the first and last captions to confirm that the overall timing reference remains correct.

To export the subtitle file:

  1. Choose File > Export Closed Captions.
  2. Enter a filename and destination folder.
  3. Select the required language subrole under Roles.
  4. Choose Relative to Timeline for times measured from the project beginning, or Absolute when the receiving workflow needs project timecode.
  5. For SRT, normally deselect Include Formatting, following Apple’s recommendation for playback compatibility.
  6. Click Export.

Apple creates a separate file for each selected language subrole. Export closed captions in Final Cut Pro for Mac.

Check the exported file with the matching video in the intended player. Concentrate on the edited transitions: each cue should contain the right words, begin and end at the intended moments, and preserve any deliberate gaps. A reliable workflow is to choose the language boundary, locate the picture frame, perform the split, and verify both text and timing before delivery.

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