Prateekiiitg56/editing-foundations

Editing foundations

Rules of thumb from film grammar. Apply them with judgment: every rule can be broken on purpose, never by accident.

1. Cut types (what each one says)

Cut	How	Use it to	Watch out
Hard / straight cut	picture and sound change on the same frame	default; 90% of cuts	cut on action or on a beat so it feels motivated
Jump cut	same framing, time removed	compress talking-head pauses, show passage of time, energy	add a punch-in (105-115% scale) on alternate cuts to hide it when it should feel smooth
J-cut	next shot's audio starts before its picture	lead into a scene, interview answers, natural conversation	0.3-1.5 s lead is typical
L-cut	previous shot's audio continues over the next picture	let a line land over B-roll or a reaction	keep the audio tail clean (no breath clipped)
Match cut	shape, motion, colour or action continues across the cut	travel transitions, time jumps, "satisfying" edits	align the matching element to the same screen position (track it)
Match on action	cut in the middle of a movement from angle A to angle B	invisible continuity in coverage	cut 2-3 frames after the motion starts
Smash cut	abrupt cut from calm to loud (or reverse)	comedy, shock, contrast ("my two moods")	silence or held frame before it makes the smash louder
Cross-cut / parallel	alternate between two lines of action	tension, comparison, before/after	shorten intervals as you approach the climax
Cutaway	cut to something else in the scene, back again	hide edits, show what is being talked about	must relate to the dialogue
Cut-in / insert	tighter shot of a detail in the same scene	product details, hands, emotion	keep screen direction
Invisible / whip / mask cut	hide the cut in fast motion, a passing object, or darkness	one-take feel, transitions in reels	needs motion blur on both sides
Montage	many short shots compress time into one idea	training, travel, process, "day in life"	rhythm from music; each shot shows one idea

2. Transitions (use sparingly)

• A cut is the default transition. Every other transition needs a reason.
• Dissolve / cross-fade: time passing, soft mood. 0.5-1.5 s.
• Dip to black / white: chapter break (black), flashback or hit (white flash 2-4 frames).
• Whip pan / zoom blur: energy, location change; 4-8 frames of directional blur either side of the cut.
• Light leak / flash: warm or nostalgic hit on a beat.
• Glitch / RGB split: tech, digital, aggressive; 3-6 frames.
• Push / slide: graphics-heavy or UI content.
• Never mix many transition families in one piece. Pick 1-2 and repeat them so they read as a style.

3. Pacing and rhythm

• Average shot length (ASL) guides: velocity/hype edit 0.2-0.6 s, reels 0.8-2 s, YouTube talking head 2-6 s with B-roll every 5-10 s, cinematic 3-8 s, documentary 4-10 s.
• Vary shot length. A constant length feels mechanical; a long hold after fast cuts lands the moment.
• Cut on motivation: an action, a look, a sound, a beat, the end of a thought.
• Leave a beat of air after a punchline or emotional line (0.5-1 s), then cut.
• Trim heads and tails: start a shot as late as possible and leave as early as possible.
• The first 1-3 seconds decide retention on social. Start with the most interesting frame, motion or line, not a logo.

4. Shot grammar

• Sizes: extreme wide (establish), wide, medium, medium close-up, close-up, extreme close-up (detail). Change by at least two sizes or 30° of angle between consecutive shots of the same subject, otherwise it looks like a mistake (jump).
• 180-degree rule: keep the camera on one side of the line of action so screen direction stays consistent.
• Eyeline and screen direction: a character exiting right enters the next shot from the left.
• Sequence pattern for a scene: wide → medium → close → detail → reaction.
• B-roll: shoot/choose in sets of 3-5 (wide, medium, close, detail, movement).

5. Story structures

• Hook → Problem → Solution → Proof → CTA: ads, launches, explainers.
• Hook → Setup → Payoff: memes, reels, skits.
• Thesis → Evidence → Counterpoint → Conclusion: documentary.
• Arrival → Highlights → Quiet moment → Departure: travel and events.
• Intro → Verse → Chorus → Bridge → Outro: music-led edits; map visual intensity to song energy.
• Contrast / two moods: calm A then chaotic B (or reverse) with a smash or transition at the switch.
• Open loop: tease the payoff in the first seconds ("wait for it", result first, then how).

6. Hooks that work in the first 1-3 s

• Result first (final product, transformation), then the process.
• Motion in frame 1 (no static logo, no fade from black on social).
• Bold on-screen text stating the payoff or question.
• A pattern interrupt: unexpected sound, smash cut, extreme close-up.

7. Speed and time

• Slow motion needs high-frame-rate source (50/60/120 fps). Conform 60 → 24/30 for real slow motion; do not slow down 30 fps footage below ~70% without optical-flow interpolation (minterpolate or Resolve Optical Flow / Speed Warp) or it stutters.
• Speed ramps: ease into and out of speed changes (see beat-sync).
• Freeze frame: hold 0.5-2 s with a zoom or a text callout.
• Reverse: useful for "rewind" and satisfying loops.

8. Audio is half the edit

• Clean audio beats clean picture. Viewers forgive soft footage, not bad sound.
• Use room tone to fill gaps; never leave digital silence under picture unless it is a deliberate effect.
• Music sets the rhythm; dialogue sets the story. Decide which leads before cutting.

9. Review checklist

• Does the first second earn the second second?
• Is every cut motivated? Any accidental jump cuts (same size, small change)?
• Any flash frames (1-frame leftovers) at cut points?
• Does the energy curve rise to a peak and resolve?
• Does it end cleanly (hold last frame ≥ 1 s, or a deliberate loop for reels)?