It reduces a video file's size by removing data the eye is unlikely to miss, so the file is easier to store, upload, and stream while still looking good.
Video Glossary
Video Compression
Video compression reduces a video file's size by removing redundant data, making it easier to store and stream.
What is video compression?
Video compression shrinks a video file by removing data the eye is unlikely to miss. It makes files small enough to store, upload, and stream smoothly, while keeping quality high enough to look good.
How compression works
Compression uses a codec, a set of rules for encoding and decoding video. Codecs like H.264 store only what changes between frames instead of every full frame, which dramatically reduces size. Bitrate settings then control the trade-off between quality and file size.
Why compression matters
Without compression, video files would be far too large to share online. The goal is the smallest file that still looks good on your viewer's screen. Too little compression wastes bandwidth, while too much creates blocky, blurry footage.
Compression and online video
When you record and stream with Livestorm, compression is handled for you, so replays play smoothly for viewers without you managing codecs or export settings.
Frequently Asked Questions
What does video compression do?
What is a codec?
A codec is the set of rules used to encode and decode video. Codecs like H.264 store only what changes between frames, which shrinks file size a lot.
Does compression reduce video quality?
It can if you compress too much, which causes blocky or blurry footage. The goal is the smallest file that still looks good on your viewer's screen.
Do I need to compress webinar recordings?
No. When you record and stream with Livestorm (https://livestorm.co/webinar-software), compression is handled for you so replays play smoothly.
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