Lesson 3 of 7 · 6 min

Editing video on the timeline

Assemble and trim a video on a multi-track timeline, add picture-in-picture and audio layers, and save it as one stitched file.

A real multi-track timeline

Open a video creative here and you get a proper timeline, not a single trim slider. It is a non-linear editor with one base video lane that plays start to finish, any number of overlay lanes for picture-in-picture clips, and any number of audio lanes. Picture a stack of transparent sheets: the base lane is the bottom sheet that runs the length of the video, and every overlay is a sheet laid on top, stacked by lane order and placed wherever you want.

Trimming, splitting, positioning

On the base lane you drag clip edges to trim, split a clip in two, and reorder. Overlays and audio move and resize the same way. This is the everyday work of tightening a cut or dropping a logo into a corner.

Elements on video are layers, not objects

This editor does not do object-level inpainting on video. To change something, you add it as a layer: a picture-in-picture overlay, a text element, or an audio track. If you need a pixel-level fix to one frame, pull that frame into the image editor and work on it there.

One save, one file

When you save, the whole arrangement goes to a single server pass that concatenates the base lane, composites the overlays, and mixes the audio into one file in one operation (restitchVideoEditAction, running ffmpeg). All of that is deterministic compute, so assembling, trimming, and mixing cost nothing. The only part of this tool that bills is captions, which the next lesson covers.

Reference

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