this post was submitted on 24 Feb 2024
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GPU encoders basically all run at the equivalent of "fast" or "veryfast" CPU encoder settings.
Most high quality, low size encodes are run at "slow" or "veryslow" or "placebo" CPU encoder settings, with a lot of the parameters that aren't tunable on GPU encoders set to specific tunings depending on the content type.
NVENC has a slow preset:
https://docs.nvidia.com/video-technologies/video-codec-sdk/12.0/ffmpeg-with-nvidia-gpu/index.html#command-line-for-latency-tolerant-high-quality-transcoding
As they expand the NVENC options that are exposed on the command line, is it getting closer to CPU-encoding level of quality?