Timeline

What is Timeline?

A timeline is the editing workspace where you arrange video clips, audio, and graphics in the order they will play: it is the visual map of your finished video laid out horizontally from beginning to end.

At a glance

Also known as
Edit timelineSequenceProject timelineEdit sequence
Used for
Arranging video and audio clips in sequence to build a finished editLayering video tracks for compositing and titlingManaging the temporal structure and rhythm of a video pieceAssembling AI-generated clips into coherent narrative sequences
Common tools
Adobe premiere proDaVinci resolveFinal cut proMorphic composeCapCut, iMovie (consumer editing)
Related terms
EditingCutSequenceCompositingPost-productionRendering

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How it compares

How it compares

Compared with related concepts

A timeline and a storyboard both represent the sequence of a video or film, but serve different purposes at different stages of production. A storyboard is a pre-production planning tool that visualises the intended sequence of shots as a series of illustrated frames: a plan for what will be captured or generated. A timeline is a post-production assembly tool that arranges the actual captured or generated material in sequence: the execution of the plan. Storyboards exist before the material; timelines organise the material once it exists.

Think of it like…

A timeline is like the score of a piece of music: everything that will be heard ( every instrument, every note, every silence ) is laid out in a horizontal sequence that represents time from left to right, and the conductor (or editor) works from that score to produce the performance, adjusting and refining the arrangement until it achieves exactly the intended result.

Pro tip

When assembling AI-generated content on a timeline, resist the temptation to use the entire duration of every generated clip. Most AI-generated clips contain their strongest content in the middle frames: the first and last seconds often feature less stable motion and more artefacts. Trim the head and tail of each clip to its most stable, visually clean portion, and use these tighter sections as your edit points. The resulting cuts will be cleaner, the motion will read as more intentional, and the overall edit will feel more controlled.

Types and variations

  • A linear timeline presents clips in a simple left-to-right sequence without multi-track layering, the format used by basic consumer editing tools.
  • A multi-track non-linear timeline stacks multiple video and audio layers vertically, enabling the complex compositing and mixing required for professional production.
  • A magnetic timeline, as used in Final Cut Pro, automatically adjusts surrounding clips when one is moved, maintaining overall sequence integrity without leaving gaps.
  • A nested sequence or compound clip condenses a group of clips into a single timeline element that can be positioned within a larger timeline like a single clip.
  • An AI-generation timeline, as in Morphic Compose, is designed specifically for working with AI-generated clips.

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Common use cases

  • The timeline is used in all forms of video post-production: documentary and narrative editing, broadcast journalism assembly, commercial and advertising production, social media content creation, music video editing, corporate and educational video production, and AI-generated video assembly.
  • It is the universal interface through which all edited video content is constructed, regardless of the source of the footage or the final delivery format.

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FAQs

What is a timeline in video editing?
A timeline is the core workspace of a video editing application where clips, audio, and other assets are arranged in chronological sequence along a horizontal axis representing time. The position of each element on the timeline determines when it appears in the finished video. The timeline is both a technical interface and a compositional space where the structure, rhythm, and content of the final piece are constructed.
What is a track in a timeline?
A track is a horizontal layer within the timeline that holds a specific type of media element. Video tracks hold video clips, with upper tracks appearing in front of lower tracks in the composite image. Audio tracks hold audio elements ( dialogue, music, sound effects ) that are mixed together into the final audio output. Most professional editing software supports multiple video and audio tracks, enabling complex layering and mixing.
What is non-linear editing?
Non-linear editing (NLE) refers to the editing approach enabled by digital video software, where clips can be placed, moved, and modified in any order at any point in the timeline without affecting other clips. This contrasts with linear tape-based editing, where footage had to be assembled in sequence from beginning to end. Non-linear editing allows editors to work freely on any section of the project, try multiple versions, and make changes at any stage without the constraints of physical tape.
What is a playhead in a timeline?
The playhead is a vertical line or marker in the timeline that indicates the current playback position: the specific frame being displayed in the preview monitor. Moving the playhead along the timeline scrubs through the video, allowing editors to navigate to specific moments, make precise cut points, and review the edit. During playback, the playhead moves automatically from left to right, playing back the sequence in real time.
How does the Morphic Compose timeline work for AI-generated video?
Morphic's Compose feature provides a timeline interface designed specifically for assembling AI-generated video content. It allows creators to arrange generated clips in sequence, trim them to their desired duration, manage transitions between clips, and build coherent sequences from individual AI-generated segments. Working with a timeline in an AI generation workflow enables the same editorial control available in traditional post-production, applied to AI-generated source material.
What is the difference between a timeline and a sequence?
In most editing software, these terms are used interchangeably: a sequence is the arrangement of clips within a timeline, and the timeline is the interface in which the sequence is displayed and edited. In some software, 'sequence' specifically refers to the export settings and frame rate configuration of a project, while 'timeline' refers to the working interface. In Final Cut Pro, the term 'project' replaces 'sequence,' but the function is identical.
What are J-cuts and L-cuts in a timeline?
J-cuts and L-cuts are editorial techniques that offset the audio and video cut points between clips, creating a more fluid transition. In an L-cut, the audio from the outgoing clip continues over the first frames of the incoming video clip: the audio 'hangs over' the cut. In a J-cut, the audio from the incoming clip begins before its video appears: the audio 'leads' the cut. Both techniques are named for the shapes they create in the multi-track timeline and are fundamental tools for creating naturalistic, seamless transitions in dialogue scenes and documentary sequences.
How should I organise an AI video timeline for best results?
Organise an AI video timeline by separating different types of content onto dedicated tracks: primary action clips on one video track, cutaways and b-roll on another, titles and graphics above, and audio elements separated into dialogue, music, and effects tracks. Trim the head and tail from each AI-generated clip to remove the least stable frames, which typically appear at clip boundaries. Working at the highest practical resolution on the timeline and exporting for each delivery format separately maintains quality throughout the post-production process.
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