Trimming and splitting clips on a Mac

You have a twenty-minute screen recording and you need four minutes of it. Or a phone video with thirty seconds of pocket at the start. This is the most common video task there is, and macOS handles the simplest version of it for free.

QuickTime, for one cut

Open the file in QuickTime Player. Edit → Trim (⌘T). A yellow bar appears along the timeline with handles at each end. Drag them to the section you want, click Trim, save.

That is the whole feature, and for "remove the dead air at the start" it is perfect. Nothing to install, no export dialog, done in fifteen seconds.

Two things worth knowing:

Trim keeps the middle. You cannot use it to remove a section from the centre and join the two halves. The yellow bar selects what survives, not what goes.

Save As, not Save. QuickTime will happily overwrite your original with the trimmed version. If the original matters, use File → Duplicate first or export to a new name.

Splitting in QuickTime, which almost works

There is a hidden second feature. Position the playhead, then Edit → Split Clip (⌘Y). The timeline turns into a strip of separate clips. You can select one and delete it, or drag clips to reorder them.

This is genuinely more capable than most people realise, and it falls over quickly:

• The clip strip is tiny and has no zoom, so precise cuts are guesswork on anything longer than a few minutes.
• There is no ripple behaviour, no undo history you can navigate, and no way to see audio waveforms — which is how you actually find the cut point in speech.
• Multiple splits become unmanageable fast. Ten clips in that strip is already awkward.
• No transitions, so every cut is hard.

It is a rescue tool, not an editing environment.

Finding the right cut point

Whatever you use, the technique is the same and it is mostly about audio.

Cut on the silence, not the word. Listen for the gap between sentences and cut in the middle of it, leaving a few frames of room at each end. Cutting tight against a word clips the consonant and sounds abrupt.

Watch the waveform. Speech is obvious as a shape once you can see it — you can find the end of a sentence by eye faster than by scrubbing. This is the single biggest reason to use something with a proper timeline.

Leave handles. When cutting a section you might want back, cut generously first and tighten later. Recovering half a second you trimmed away means going back to the original file.

Cut on motion for visual edits. A cut during movement reads as smoother than a cut during stillness.

When to stop using free tools

The threshold is roughly this: more than two cuts, or any need to reorder.

One trim, QuickTime. Removing a middle section, QuickTime's split will do it grudgingly. Assembling six usable sections from a twenty-minute recording, adding a title, and putting music underneath — you are now fighting the tool, and the fight takes longer than learning a timeline.

The other threshold is re-encoding. QuickTime's trim is fast because in many cases it is not re-compressing the video, just changing where it starts and stops. That preserves quality perfectly. Once you add anything — text, a transition, a speed change — the video has to be rendered again, and at that point export settings start to matter.

Doing this in Garfi

Garfi Video Editor gives you the timeline the above is missing: trim, split, reorder and duplicate clips, with audio waveforms so you can see where the sentences end, and undo and redo while you work.

Speed changes run from 0.25× to 4×, which covers both "slow this down to show the detail" and "nobody needs to watch this loading spinner in real time". You can detach audio from a clip and add fades where a cut is too abrupt, add one picture-in-picture layer, text, transitions and editable automatic captions.

Export is MOV or MP4 in H.264 or HEVC, up to 4K where supported, with no watermark. Projects save as portable .gvideo packages, so a rough assembly today is still editable next week.

It is a free download with an export trial you start yourself — fourteen days, no automatic renewal, no charge when it ends. Editing and saving projects stay available afterwards; a one-time purchase unlocks export permanently. No account, no cloud backend, no generative AI.