My Old Laptop Taught Me Everything About Codecs

When your footage fights back

Anyone who has edited on an older or modest machine knows the frustration. You drop a clip into your timeline and the playback turns to a slideshow. Scrubbing becomes a guessing game. What went wrong?

The answer, almost every time, is the codec.

Photo by Peter Stumpf on Unsplash

What is a codec, exactly? It is the method used to compress and store video. Every codec makes a tradeoff between file size, image quality, and how much work your computer needs to do to play it back.

Two very different kinds of video files

Not all codecs are created equal, and they serve completely different purposes.
DELIVERY
H.264 / H.265 (HEVC)

Highly compressed. Small files. Used for YouTube, social media, WhatsApp, streaming downloads. The server loves them. Your editing software does not.

EDITING
HAP / ProRes / DNxHD

Much larger files. Very fast to decode. Built so your editing software can scrub and play without breaking a sweat. Quality is preserved at every cut.

The compressed codecs we download and share are designed to save space and bandwidth. To do that, they throw away data and make your CPU or GPU work hard to reconstruct each frame at playback. On a fast machine this is manageable. On an older laptop it is a grind.

Converting that same footage to an editing codec like HAP dramatically increases the file size, but the data is now laid out in a way that editing software can read quickly and easily. Playback becomes smooth. Scrubbing feels instant. Your old laptop becomes a capable editing machine again.

Cameras that shoot RAW video preserve nearly everything the sensor captures. Color information, highlight detail, shadow information, none of it is thrown away. This is what gives colorists and editors so much room to work in post.

The tradeoff is file size and complexity. RAW files are enormous and need conversion before most editing timelines can handle them gracefully. Transcoding into a managed format, something like ProRes or a high-quality intermediate, gives editors the best of both worlds: the original quality, in a container their software loves.

The free tool that handles all of it

Shutter Encoder is a free, open source video conversion application built on top of FFmpeg, one of the most powerful media processing tools in existence. The key difference is that Shutter Encoder wraps all of that power inside a clear, approachable interface anyone can learn in an afternoon.

Posted Using INLEO