Hopefully 10-bit pipeline will be supported once HDR becomes common. While it runs on an 8-bit pipeline, this isn’t an issue for Anime. It allows reading Blu-ray disks (unencrypted), and has a pretty UI to deal with. AV1 began major development in mid-2018 so by that logic we got 2-3 more years to go. HEVC took 3-4 years before it was more widely accepted by Anime encoders, and took 5 years until 2018 before I began experimenting with it. For now, they look promising, and I am excited to see results in a few years. It performs (quality-wise) not as well as libaom, but quality is still better than x265 (SSIM), and encode times are much more reasonable. SVT-AV1 is Intel and Netflix’s scalable implementation. Unfortunately the reference encoder libaom is still in early stages of development and is rather inefficient. IIRC some of its baseline is based on VP10, which Google scrapped and had its codebase donated to develop AV1. AV1 is a next gen codec with members from many tech giants (Apple, Google, MS, etc.) to create a royalty free codec. Update: Apple now somewhat supports VP9 on some devices for 4K streaming (iOS 14+). VP9 today is mainly used by Google (YouTube) via the webm/DASH format, which Apple refuses to support on iOS devices which is probably why it’s not widespread. HEVC does have a slight advantage in terms of parallel encoding efficiency, though they are both just as slow when encoding compared to x264. HEVC is about the same quality as VP9, a codec by Google.
In terms of efficiency as of right now (2019/2020), when properly encoded, HEVC could save ~25% bandwidth minimum compared to AVC (H.264, with its encoder known as x264) from my observations. Most modern devices support hardware decoding (iOS, Android, laptops, Macs, etc.), and even at 1080p most older consumer PCs should be able to software decode just fine. Despite these downfalls, HEVC does compress much better in higher crf (lower bitrate) and has been a good codec to use since 2018. While most devices now support HEVC in some form or another, adoption didn’t really kick off. While developed as a replacement for H.264, due to early performance and licensing issues, it didn’t gain much traction, especially as a streaming format.
X265 is a library for encoding video into High Efficiency Video Coding (HEVC / H.265) video compression format.
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