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What is Video Rendering?

Video rendering computes final frames and audio from a timeline, composition, effects graph, or generated scene. Its output may be displayed interactively or encoded as a deliverable file.

How Video Rendering works

A renderer evaluates source clips, transitions, transforms, color operations, graphics, and audio at each timeline position to produce completed samples. Rendering is distinct from encoding: the former resolves the composition, while the latter compresses those samples into a codec and container. Preview rendering favors responsiveness and caching, whereas an export renderer normally uses full-quality media and settings before mastering.

Key facts

  1. Render caches are only reusable while their inputs remain unchanged; modifying an upstream effect, source interpretation, color setting, or timeline region can invalidate dependent frames.
  2. Temporal denoisers, motion blur, and optical-flow effects inspect neighboring frames, which raises memory use and makes isolated frame rendering or arbitrary chunking more difficult.
  3. A mismatched working color space, transfer function, or alpha interpretation can alter levels and edges during rendering even when the final encoder settings are otherwise correct.

When Video Rendering matters

Rendering is required when exporting edited timelines, animated templates, captions, or layered effects. Higher resolution and more complex effects generally trade shorter turnaround for greater processing demand.

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