# What is intra-frame vs inter-frame compression?

> Intra-frame compression treats each frame independently — like a series of individually compressed photos. Inter-frame compression compresses groups of…

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## Intra-frame compression treats **each frame independently** — like a series of individually compressed photos. Inter-frame compression compresses **groups of frames together** by only storing the changes between them. This is the fundamental distinction between ALL-I and Long GOP codecs.

## **Intra-frame (ALL-I) — how it works**

Every frame is compressed on its own. Frame 1 is a complete compressed image. Frame 2 is another complete image. No frame references any other.

**Advantage:** Every frame is independently high quality. Scrubbing through the timeline is instant. Individual frames can be extracted as high-quality stills.

**Disadvantage:** File sizes are 2-3x larger because every frame stores redundant information like a static background.

## **Inter-frame (Long GOP) — how it works**

Frames are grouped (typically 12-15 per group). The first frame is complete. Subsequent frames store only what **changed**.

If your background is a static wall and only the subject moves, inter-frame only stores the movement — not the entire wall again. Extremely efficient.

**Advantage:** Much smaller files at the same visual quality. Longer recording times per card.

**Disadvantage:** Editing software must decode the entire group to display any single frame, demanding more processing power.

## **Cameras with both options at Camera Shop Egypt**

## **Which to choose for your work**

For **event videography, documentaries, and long-form content** — use inter-frame (Long GOP). The file size savings are enormous and modern editors handle it well.

For **VFX, compositing, commercial work, and frame-accurate grading** — use intra-frame (ALL-I). Per-frame quality justifies larger files.

If unsure, start with Long GOP and switch to ALL-I only if you encounter specific issues.

## 

Modern editing software like DaVinci Resolve handles Long GOP very efficiently. The old advice that ALL-I is always better for editing is less true today — test both with your hardware.

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