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Glossary

Video editing glossary: the working vocabulary of post, in plain language

Post production runs on shorthand, and most of it compresses cleanly into one line per term. What follows is the vocabulary used across this site, written the way colleagues explain it to each other.

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  • The vocabulary used across this site, in one place
  • Written as colleagues explain it, not as a manual
  • Grouped by stage: edit, media, colour, delivery
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Edit and timeline

Timeline, clip, sequence, playhead, trim

The editing vocabulary first: the timeline holds clips in order; a sequence is one arrangement on it; the playhead marks the current frame; trimming moves the start or end of a clip without disturbing what sits next to it.

  • Timeline: the ordered strip of clips that becomes the video
  • Sequence: one arrangement on the timeline, ready to render
  • Playhead: the line marking the frame you are on
  • Ripple and roll: trims that shift, or leave, surrounding clips
Media and codecs

Codec, container, bitrate, proxy, long-GOP

The file vocabulary: a codec compresses the video inside a container file; bitrate is how much data per second carries it; a proxy is a light copy made for playback; long-GOP codecs group frames tightly, which makes editing them heavier.

  • Codec: how video is compressed, like H.264 or ProRes
  • Container: the file wrapping, like MP4 or MOV
  • Bitrate: data per second; quality and size both ride on it
  • Proxy: a light stand-in used for smooth playback
Colour

LUT, node, qualifier, Log, Rec.709

The colour vocabulary: a LUT maps one colour space onto another; a node is one step in a grade chain; the qualifier selects a range of colours to adjust; Log footage looks flat on purpose, and Rec.709 is the standard space it usually lands in.

  • LUT: a lookup that translates a colour space or a look
  • Node: one link in the grading chain
  • Qualifier: selects colours for a targeted change
  • Log to Rec.709: flat camera footage to standard viewing space
Audio and delivery

LUFS, true peak, watermark, master

The finishing vocabulary: LUFS measures perceived loudness, and platforms normalise around minus fourteen; true peak catches clipping between samples; a watermark is a light burn-in for review; the master is the highest quality file kept for the archive.

  • LUFS: perceived loudness, the unit platforms normalise to
  • True peak: the ceiling that catches clipping between samples
  • Watermark: an on-screen burn-in for review copies
  • Master: the archive-quality file kept beyond delivery
Help

Frequently asked questions

Glossary questions that come up before a first render.

Is this the full vocabulary of editing?

No; it is the working core that the pages on this site use. Effects, Fusion and delivery each add dialects of their own, and the linked pages introduce them in context.

What does rendering actually mean?

Rendering is the computer drawing every frame of the timeline into finished video, applying each effect, grade and mix on the way. Delivery settings decide the file that comes out the far side.

What is the difference between a project and a timeline?

A project is the whole workspace: media, bins, timelines, grades and settings. Timelines are the arrangements inside it; one project can hold many timelines for different cuts.

Why does the same footage look flat on import?

Camera Log footage is recorded flat on purpose: it keeps more range for grading. A LUT or a conversion moves it into the standard viewing space, which is where the picture starts looking normal.

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Open the studio and put one term to work: trim a clip, key a green screen, export a preset; the words stick better with a timeline open.

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Video Editing Glossary | Timeline, Colour & Delivery Terms