How to split a long MP4 into smaller files on Windows

Short answer

Use ShrinkCut’s **Split** tab: load one video, scrub the seekable preview, choose equal parts or fixed-length segments, adjust markers, then export `*_part_001.mp4` files. Use **Fast (stream copy)** for speed or **Accurate (re-encode)** for precise cut points.

Fast vs accurate

**Fast** — stream copy; cuts near keyframes; quick

**Accurate** — re-encodes; frame-accurate when timing matters

Steps

Open ShrinkCut → **Split**.

Load the long MP4 and scrub to review.

Choose equal parts or fixed length; drag markers as needed.

Pick Fast or Accurate.

Export parts to a folder on your PC.

Tip

You can also compress first, then enable **then split** into N equal parts in one pipeline.

Summary

Split is for long recordings that must ship as smaller chunks — without a full multi-track editor.