Quick Start
- Create a project from the Projects screen.
- Tap Add your first clip (or Add Clip or Photo) to import media. CosmiCut can detect common packed 3D formats, like side-by-side and top/bottom, and convert them to spatial video during import.
- Use the timeline to trim, reorder, and split clips.
- Open a clip to fine-tune effects or convert it to spatial video.
- Use Effects and Filters for project-wide grading.
- Add music from the music menu.
- Tap Export, configure destination, conversion, and output format, then tap Begin Render and Export.
Tip: Start with rough timeline edits first, then do color/effects, then export.
Projects
- Create: Create from the project sheet.
- Copy: duplicate an existing project from the project list.
- Delete: remove with swipe/context controls.
- Rename: edit the project title in the navigation title field.
If no projects exist, CosmiCut starts from an empty state with an Add your first clip action.
Timeline
Core Actions
- Add media: use Add buttons in the timeline.
- Reorder clips: drag clips to new positions.
- Split clip: use the scissors button at the playhead.
- Transitions: add/remove transitions at clip edges.
- Zoom: adjust timeline zoom with the magnification slider.
Import Sources
- Photos picker (videos and images).
- Files picker (movies and images).
- Packed 3D videos, including side-by-side and top/bottom layouts, are detected and converted to spatial video when possible.
Clip Editor
Open a clip from the timeline to edit clip-level settings.
Trim
- Drag Trim Start and Trim End handles in the clip timeline.
- Minimum trim length is enforced to keep clips usable.
Effects and Filters
| Control | Range | Default |
|---|---|---|
| Brightness | -1 to 1 | 0 |
| Saturation | 0 to 2 | 1 |
| Contrast | 0 to 2 | 1 |
| Gamma | 0.5 to 4 | 1 |
| Hue | -π to π | 0 |
| Vibrance | 0 to 2 | 0 |
Filter options include: None, Chrome, Fade, Instant, Noir, Process, Sepia, Thermal, Halftone.
While spatial conversion runs, clip controls are temporarily disabled.
Project-Wide Effects
Use the project Effects and Filters panel to grade the full timeline output.
- Includes the same filter/effect controls as clip editing.
- Applies globally to the rendered project output.
- Reset Project Effects restores defaults.
Music Workflow
- Open the music menu on the project toolbar.
- Choose Choose Music or Replace Music.
- Use Edit Music to trim and align audio.
- Use Remove Music to clear track and trim markers.
Spatial Workflow
Convert a Clip to Spatial
- Open clip editor.
- Select depth model:
- Very Accurate and Slow (Depth Pro)
- Less Accurate and Fast (Depth Anything V2)
- Tap Convert to Spatial.
- Wait for progress to complete.
- Preview with the cube button (where supported).
Batch Convert 2D Videos
- Open the Project Inspector.
- Choose a Conversion Process.
- Tap Convert 2D Videos to convert all non-spatial videos in the project.
- Use Stop Conversion if you need to cancel an in-progress batch.
Spatial GIF
- From clip editor, tap the Spatial GIF button to generate/share.
On visionOS, Spatial Preview is available when all project clips are spatial.
Export
- Tap Export in project view.
- Choose a Destination: Save to Photos or Save to Files.
- If the project contains non-spatial clips, enable Convert clips to spatial before export to render them as spatial video first.
- When conversion is enabled, choose the Conversion Process.
- Choose an Output Format: Spatial Video, Side by Side, Side by Side Half, Top/Bottom, or Top/Bottom Half.
- Tap Begin Render and Export.
3D export formats are available when all clips are spatial, or when Convert clips to spatial before export is enabled.
Import/Export Preferences
Settings → Import and Export Prefs:
- Video Import: Photos App or Files App
- Video Export: Ask Each Time, Photos App, or Files App
Watermark
Free mode may include a watermark. Subscription/purchase unlocks watermark-free export.
Keyboard Shortcuts
| Action | Shortcut |
|---|---|
| New Project | Cmd + N |
| Export Project | Cmd + E |
| Play/Pause | Space |
| Scrub Backward | ← |
| Scrub Forward | → |
Troubleshooting
Export won’t save to Photos
- Grant Photos permission in system settings.
- Retry export after permission is accepted.
Spatial conversion is slow
- Try the faster depth model option.
- Use shorter trims before conversion.
- Batch conversion and export-time conversion can take a while on longer projects.
Packed 3D import was not detected
- Use common filenames or formats such as side-by-side, top/bottom, SBS, TB, or OU when possible.
- If detection does not trigger, import the clip as a regular video and use CosmiCut's spatial conversion tools.
3D export formats are unavailable
- Convert all clips to spatial first, or enable Convert clips to spatial before export in the export sheet.
Audio import failed
- Try re-importing from Files app.
- Verify the selected media is a supported audio format.
During long exports/conversions, keep the app in foreground when possible for best reliability.