Trimmed Sources
CoreTrim exports the used parts of each source, with handles you choose. This is the storage-saving mode for finished projects, client handoffs, and long-term archives where unused footage does not need to travel with the cut.
CoreTrim guide
Export only the source media your Final Cut Pro project needs.
CoreTrim is a Final Cut Pro workflow extension, not a standalone desktop app. It requires Final Cut Pro to be installed on your Mac. Drag a project from Final Cut Pro directly onto CoreTrim; CoreTrim analyzes that project, copies or trims the source files, then writes a new project export that links to the exported media. Your original Library, edit, and source files stay untouched.
Source NameFPSDurationStatus
Interview_A.mov29.97DF00:04:18:12Passthrough Trim
B-roll_03.mov2400:00:42:08Copy Original
Multicam_CAM_B.mov23.9800:02:10:05Passthrough Trim
Choose the source export
Two export modes for two different jobs.
Untrimmed Sources
CoreTrim copies every original source used by the project and points the exported project to those new copies. This keeps the exported project matching the original project while leaving the original media in place.
Basic workflow
From the Final Cut Pro workflow extension to a clean source export.
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01
Drag the project from Final Cut Pro onto CoreTrim.
Open CoreTrim from Final Cut Pro, then drag the project you want to process directly onto the CoreTrim workflow extension. CoreTrim receives the project data it needs without a separate export step.
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02
Let CoreTrim read the project.
CoreTrim reads the project, finds file-backed sources, shows the original project size, and estimates the exported media size.
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03
Choose Trimmed Sources or Untrimmed Sources.
Use Trimmed Sources when you want smaller media with handles. Use Untrimmed Sources when you want a full source copy for every source used by the project.
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04
Set handles and multicam behavior when trimming.
For trimmed exports, choose handle length and whether CoreTrim should process all multicam angles or only the angles used in the cut. These controls are locked for untrimmed source copies because no trim decisions are needed.
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05
Review the status column.
Each source shows CoreTrim's safest available action: passthrough trim, transcode trim, copy original, or skip. Change a source only when you have a reason to override the automatic choice.
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06
Export to a new folder.
CoreTrim writes new media and a new project export in the destination you choose. Progress text shows whether CoreTrim is trimming or copying each source.
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07
Import the exported project into Final Cut Pro.
Bring the exported project back into Final Cut Pro and review it. The new project should link to the exported media, not your original sources.
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08
Keep the export report.
The report explains what was trimmed, copied, skipped, or warned about, and gives you a source list for the project export.
What CoreTrim does safely
Designed around non-destructive source handling.
Originals stay untouched
CoreTrim does not modify, move, rename, rewrite, or delete your original media files.
Your edit stays untouched
CoreTrim writes a cloned project export for import. It does not change your existing Final Cut Pro Library.
Warnings stay visible
Risky choices, skipped sources, and fallback copies are described before export and in the report.
Effects and generators stay secure
CoreTrim keeps effect, title, generator, and plug-in references. Motion templates are copied only when CoreTrim can safely see the template file.