Make your first reel
Make a reel by choosing parts, then refine those parts. Follow these actions in order for a first project. Use the separate interface reference whenever you need to identify a button or understand a setting.
A source is a video recording or an empty source for text and photos. A part is a section of that source you choose to use. The reel plays those parts in order. Importing a video does not mean using all of it: choose the moments first, then edit each part's framing, look, sound and timing.
The examples use frames from player_export_3.mp4, app screenshots and original images created for the photos-and-titles walkthrough.
Open a video source and stay in Select. Move the playhead to the start you want, press +, then tap the filmstrip at the end. Repeat for each useful moment. Add part by time lets you enter precise source times. Select shows the original recording; Preview plays the parts you chose. Their durations and order determine what appears in the reel.

Make a reel by choosing parts, then refine those parts. Follow these actions in order for a first project. Use the separate interface reference whenever you need to identify a button or understand a setting.
Find your screen, then select a ring on the image or a control name to read its explanation. The selected ring stays transparent so you can see the app underneath. Choose Phone or Desktop to match your layout, and enlarge any image for a closer look.
Switch to Preview to watch the selected parts with their edits. The parts list shows the playback order. Drag a numbered handle, or enable reorder mode, to move a part. Dragging elsewhere on the timeline moves the playhead. Open a part's settings to edit just that part; Settings for all parts applies shared changes to the parts in this source. Recheck the order after adding text or photos. Parts and sources turn green while you move them. When you drag a source on the reel timeline, the source list shows its new position before you release it.

Choose Add text beside a part: Text opens with the default text selected, so you can type your words straight away. In Placement, Standalone part gives the text its own duration; Overlay puts it over the continuing picture without extending the reel. Overlay together shares the next overlay's time. Set Position, and use Crawl and Motion for animation. Steps appears for timing the crawl one row at a time. Color controls the background of a standalone text part.

Use the + menu beside a part to add a photo. Choose Standalone part for a timed photo in the sequence, or Overlay to show it over the continuing picture. Adjust Picture, Framing, Look and Effect; Color controls the background of a standalone image. Add text as a separate item when the photo needs a caption.

In the reel editor, open Music. Search by title or filter the library by category, length and availability. Play preview lets you listen to a track; + adds it to the reel. Included tracks work offline; other library tracks may need to be downloaded. You can also import an audio file. Open the music block to set when it starts and ends in the reel, where playback starts within the song, and its volume. Set fades in the main music panel. Adding the first track mutes source audio; raise the source or part volume if you want to mix it with the music.

Open the transition row between two parts. Preview choices in the gallery, pick one and set its timing, then confirm. Watch the join in context: a transition can hide a short action or text. Start and end treatments belong to the reel, while a join connects its neighboring parts.

Prefer an automatic first draft? Open Auto Reel, add your videos, choose a duration and music, then set pacing, ordering and analysis precision. The app analyzes the footage and music, checks scenes and image quality, arranges the parts and reviews the result. More footage, higher precision and underwater correction take longer to process. This can take several minutes; follow the progress shown on screen. Review and edit the resulting parts before exporting.

Return to the Reel page and watch from beginning to end with sound. Check the first frame, every join, text readability, music and the ending. Save the editable project, then open Export. Choose the size, quality and a format your device supports. Wait for completion and open the exported file to check it. Saving a project and exporting a video are different actions.

Privacy
Editing, analysis and preview run locally. Network access supports actions such as updating the public music catalog, downloading tracks, resolving a pasted Pixabay link, sending feedback or opening a link you choose.
No app account, analytics or automatic crash reporting. Editing and media analysis take place on your device.
Free, with your support
There is no paid feature tier. The editor, transition creator, photos-only reels, music catalog and supported export features are included without an upgrade.
A free app still has costs: developer program fees, a Windows code-signing certificate, and hosting for the site and music library. These are paid out of pocket. When FrameOSU saves you time or the cost of another editor, a tip helps cover those bills. Always optional, always appreciated.
Other ways to support the app:
Prefer another way to help? Ask about tipping by email
Get the app
FrameOSU uses each operating system's native media tools. The interface and project format are shared across platforms; successful export has been confirmed on Windows and macOS.
The Windows editor includes native video thumbnails, waveforms and a live preview. Export supports H.264, with HEVC available on suitable devices.
The Android phone and tablet build is available through Google Play testing, with camera and photo-library import.
The iPhone and iPad editor is in development, including camera and photo-library import. Successful export has not yet been confirmed on these platforms.
The Mac version is in development. Native video export has been confirmed in development builds; preview is still being tested.
FrameOSU is designed as an installed desktop and mobile app. It uses the operating system's media tools for decoding, seeking and encoding. A browser-based version is not planned.
FrameOSU is free and needs no account. Windows distribution is being prepared through the Microsoft Store. Until a direct listing is available, a store link may open search results instead.