How Video Codecs Work and Why You Should Watch

David Kong of David Kong.net does a super job of explaining video compression.

 

Here’s an outline of what he covers in this tutorial:

  • What a codec is – And how it differs from a container.
  • Different types of codecs – And why I frequently use 4 different codecs on a single project.
  • Bit Depth – What it means and why it matters.
  • Chroma Subsampling – 4:4:4, 4:2:2, and 4:2:0, and when it becomes an issue.
  • Spatial Compression and Blocking – One of the most common artefacts you see with normal work.
  • Temporal Compression – Long-GOP codecs, inter-frame compression, and ALL-I codecs.
  • Lossless vs. Lossy compression – How image compression differs from data compression.
  • Bit Rate – How to calculate bit rates and the differences between kbps/kBps/Mbps/MBps.
  • Raw – Briefly, the difference between Raw, compressed, and uncompressed (this could have been a 40-minute tutorial on its own!)

How Codecs Work – Tutorial from David Kong  on Vimeo

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