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submitted 5 months ago by BlueSwordM2@lemmy.world to c/av1@lemmy.world

Good day to you all folks.

We have another update to svt-av1-psy which has been cooking for a while now, and it's rather large for a letter change. You already know the way we roll from previous releases; I'll directly start with the changelog.

-> MAIN CHANGES:

  • New parameter: --max-32-tx-size. This restricts block transform sizes to a maximum of 32x32 pixels. This can be useful in very specific scenarios for improving overall visual quality where the AV1 spec can allow for bad decisions decided by SAD/SSD/PSNR.

  • New option: --hdr10plus-json. This parameter, added by quietvoid, allows for HDR10+ HDR support. In order to build a binary with support for HDR10+, see our PSY Development page

  • New option: --adaptive-film-grain. This parameter which helps remedy perceptually harmful grain patterns caused by extracting grain from blocks that are too large for a given video resolution. This parameter is enabled by default.

-> TUNING:

  • Disabled SSIM-cost transform decisions while keeping SSIM-cost mode decisions, generally improving Tune 3's efficiency & consistency. Future changes might contain additional tuning at this level.

-> PERFORMANCE:

  • Additional NEON optimizations for ARM platforms, providing a speed increase

-> BUG FIXES:

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this post was submitted on 09 Jun 2024
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