In the Blink of an Eye
Walter Murch's short classic on film editing, from one of cinema's most respected editors and sound designers. Why cuts work, when to cut and how to prioritise emotion and story over continuity: thinking that applies directly to stitching short AI clips into ads and explainers.
Book
Other
Walter Murch (Silman-James Press)
About 3 hours of reading
Intermediate
Paid book
What it is
In the Blink of an Eye: A Perspective on Film Editing is a short book by Walter Murch, a celebrated film editor and sound designer. It is published by Silman-James Press; the revised second edition (2001) added a section on digital editing. It is one of the most widely recommended books on editing, and it is short enough to read in an evening.
What it covers
Murch asks why cutting from one shot to another works at all, when nothing in real life jumps like that. His answers shape how editors think:
- Why we accept cuts, and the link he draws between cuts and the way we blink when our thoughts change.
- The rule of six: a ranking of what a good cut should serve. Emotion comes first, then story and rhythm, with eye trace, two-dimensional screen plane and three-dimensional space of action after them. When you cannot satisfy all six, give up the ones at the bottom first.
- When to cut: the moment an idea or emotion is complete, not when a clip runs out.
- Working habits: choosing among takes and looking at material with fresh eyes.
Why it matters for AI video work
AI generators give you many short clips, each a few seconds long, with small inconsistencies between them. Much of the craft is choosing the right seconds and cutting them together so the viewer feels the story and does not notice the joins. Murch's priority on emotion and story over strict continuity is freeing: a small continuity slip matters less than a cut that lands the feeling. His idea of cutting when a thought completes is exactly what makes short ads feel tight.
How to read it
- Read it once quickly, then reread the rule of six with one of your edits open.
- Re-cut a 30-second ad you made, applying the rule of six to every cut.
- Watch a favourite ad frame by frame and note why each cut happens where it does.
Limits to know
It is about feature films, not social ads, and it does not teach software. The thinking transfers; the specifics of platforms and tools you learn elsewhere.
Who it suits
Video freelancers who can operate an editor and want to understand why some edits feel right.
Pair it with on Sefism
- Follow the AI video and design for clients roadmap and keep its cheat sheet open while you work.
- For platforms, proposals, pricing and getting paid, use the Freelancing roadmap.
Best for: deciding where and why to cut when you assemble AI clips.
Ready to start?
Opens on Walter Murch (Silman-James Press) in a new tab.
Stuck on something specific?
Writing only gets you so far. If you want an answer to your situation rather than the general case, book a session and we will work through it together. Sessions are free for approved Sefism members, and a few slots open each week.
Follow along
New writing, resources and project ideas land here first.