What is a nested sequence, and how do you make one?

A nested sequence is a group of clips folded into a single clip that carries its own timeline inside it. In Video by Zaweba you make one by selecting the clips and choosing Clip > Nest, or pressing Ctrl+Alt+N. The clips and their sound move into a timeline of their own, and what is left on your main timeline is one purple clip you can trim, speed up, grade and add effects to just like ordinary footage.

Other editors use other names for the same idea. You may have seen it called a compound clip, a precomposition or a nested timeline. The point is always the same: a busy stack of layers becomes one tidy object, so you can treat a whole little scene as a single piece.

Why you would nest anything

Picture a ten second montage built from six short clips, a title and a sound effect. You like it, and now you want the whole thing to slow down a little, fade to black and wear the same warm grade. Without nesting you would have to change six clips one at a time, and keep their timing in step while you did it. Once the montage is nested, you change one clip and the whole montage follows.

Nesting also helps when you want an effect to act on the finished look of several layers rather than on each layer separately. A blur or a speed ramp placed on a nest treats the combined picture as one image. And because nested pictures keep their transparency, a nested title built from several layers can still sit over the footage beneath it without a black box appearing behind it.

There is a quieter benefit too. A long project gets easier to read when finished sections stop sprawling across eight tracks. A nest keeps the main timeline short and calm, which makes the next round of edits less fiddly.

How to make a nest, step by step

Start on the timeline. Select the clips you want to group, using a drag across them or by holding Ctrl while you click each one. Include the sound clips if you want the sound to travel with the picture, though Video by Zaweba moves the clips' own sound in with them anyway.

Choose Clip > Nest, or press Ctrl+Alt+N. The selected clips vanish from the main timeline and one purple clip takes their place, at the same spot and the same length.

To change what is inside, double-click the purple clip. Its timeline opens and you can trim, reorder or replace the clips in there as usual. Whatever you change shows up in the nest when you return to the main timeline.

If you change your mind about the whole idea, select the nest and choose Clip > Break apart. The clips come back out onto the main timeline.

What a nest can do once it exists

Treat the purple clip as footage. You can trim its ends to use only part of what is inside, which is handy when the montage runs long. You can change its speed or give it a speed ramp, so a whole sequence eases into slow motion together. You can give it a colour grade in the Inspector, so a section of mixed shots ends up with one consistent look. You can drop effects and transitions on it like any other clip.

Nests can also go inside nests. Video by Zaweba allows nesting up to four levels deep, which is plenty for real projects. If you find yourself wanting a fifth level, that is usually a sign that the project would be easier to follow split into separate timelines, which the app also supports with tabs above the timeline.

Habits that keep nests easy to live with

Nest late rather than early. Do the rough cut on the main timeline where you can see everything, and fold a section away once it is roughly settled. Opening a nest to change one frame is quick, but hunting through several nests for a clip you half remember is not.

Keep sound in mind. Because the nest takes the clips' sound with it, the whole section's sound travels as one piece, and the music bed on the main timeline still ducks or fades as normal.

Grade in one place. If the clips inside already have their own grades and you also grade the nest, the two stack. That is fine when you mean it, for a final look on top of corrected shots, but it can be confusing later. Decide which layer does the correction and which does the style.

Finally, remember Break apart exists. A nest is not a one-way door, so it is safe to try one and see if it makes the job simpler.

Nesting is one of those features that seems abstract until the day you need it, then becomes part of every project. Video by Zaweba is free software, works offline and needs no account, so you can try it on your own footage without signing up for anything.