Best settings for offline still image compression about vvenc HOT 8 CLOSED

Just out of curiosity. Would does real time mean for still image compression?

Otherwise "slower" provides the best compression, "medium" provides the best tradeoff between speed and performance. Using QPA is still recommended, if you are not measuring VMAF or PSNR - but if the pics should just look good, please use it.

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Forget about my real time comment for still image, it does not makes sense indeed. I just wanted to say it can take the time needed. Thanks! The project I'm involved is not for objective quality evaluation purposes, but just for consumption by human (just look good is the target). The most important for me is rate control, as I want the pictures to have the closest possible bitrate with regards to the "-b".

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Another question - for a 8-bit yuv 420p, does it make sense to use the default 10-bit depth, or better set to use 8-bit internal depth?

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I would recommend leaving --internal-bitdepth 10. 10-bit can help to mitigate banding artifacts. And AFAIK, unlike with other encoders, encoding to 8-bit does not speed up encoding since VVenC has no assembly for 8-bit.

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Right, so I'll stick with 10-bit and then convert back to 8-bit after decoding.

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Btw, any chance the 8-bit code path will receive SIMD optimized code?

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Not in the near future. This would mean rewriting a lot of code and vastly complicating the buffer pointer logic we use. All of this while we do support the use 8-bit coding, just with a suboptimal runtime.

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I think this issue is so far resolved, closing.

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