#9585: nlmeans filter is crazy-slow
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Reporter: Dimo | Type: defect
Status: new | Priority: normal
Component: undetermined | Version: 4.4.1
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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For a standard 1080p x264 input the nlmeans filter results in ridiculous
performance degradation. I'm getting just over 1 fps with the filter and
130+ without the filter.
How to reproduce:
{{{
ffmpeg -i in.mkv -filter:v "nlmeans" -c:v hevc_nvenc -preset p7 -rc vbr
-cq 24 -c:a copy outputfile.mp4
ffmpeg version N-105185-gce4d459db1-20220105 Copyright (c) 2000-2022 the
FFmpeg developers
built with gcc 11.2.0 (crosstool-NG 1.24.0.498_5075e1f)
}}}
It's worth mentioning that I tried the plain non-gpu HEVC codec with no
noticeable improvement. Meanwhile, Handbrake is easily pulling off 15fps
(which is still quite sad) for the same file but they seem to have their
own entirely independent implementation that's not using FFmpeg for
filtering.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9585>
FFmpeg <https://ffmpeg.org>
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