The less data a codec can use to display an image without degrading its quality, the more efficient it is. This leads to an inevitable question: If it’s been working for so long, and is compatible with virtually every device consumers own today, why replace it?Įfficiency is the answer. It was finalized all the way back in 2003 and really started to catch on a few years later. H.264 is an incredibly popular codec that forms the basis of most online video shown today.

It’s the most popular way to encode video to HEVC, but it’s not the only choice. The standard was defined by the Moving Picture Experts Group (MPEG) and the Video Coding Experts Group (VCEG), and each calls it by a different name, but the standard is the same.Īnd what about x265? That’s the open-source encoding project, not the standard. Each is a different name for the same codec. So, what’s the difference between H.265 and HEVC? There isn’t one. Video encoding isn’t defined by the standard.” This is why there are many different video encoders, and some are more efficient than others. “When you define a codec, the only thing really defined by the spec is the syntax of the compressed video stream, and the method to decode it. Tom Vaughan, the Vice President of product management and marketing at MultiCoreWare, developer of the open-source x265 encoder, clarified this. Interestingly, a video coding standard doesn’t define how video is encoded into a file.

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