Choose time from the source, not guesswork
Use the measured duration and preview controls to position start and end points. The output duration is calculated before processing.
Understand keyframe behavior
Fast packet-copy trimming is not always frame accurate. When the media engine needs to transcode to honor a non-keyframe start, processing takes longer but the requested range is preserved more reliably.
Keep a master copy
Trimming creates a new file. Keep the source when you may need a different cut later.
Check the first and last second
After export, review both boundaries for clipped speech, abrupt audio, or an unintended frame before publishing.
Official marketplace references
Requirements can change. Review the source before publishing an important listing.
Mediabunny browser media toolkit documentation ↗