mirror of https://github.com/mpv-player/mpv
manpage: add some blabla about zimg speed vs. libswscale
Of course nobody will read this. I'm just putting it there so I can blame users, who run into problems, for not having read it.
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@ -4022,7 +4022,7 @@ Software Scaler
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VOs like ``drm`` and ``x11`` will benefit a lot from using ``--sws-fast``.
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VOs like ``drm`` and ``x11`` will benefit a lot from using ``--sws-fast``.
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You may need to set other options, like ``--sws-scaler``. The builtin
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You may need to set other options, like ``--sws-scaler``. The builtin
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``sws-fast`` profile sets this option and some others to gain performance
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``sws-fast`` profile sets this option and some others to gain performance
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for reduced quality.
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for reduced quality. Also see ``--sws-allow-zimg``.
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``--sws-allow-zimg=<yes|no>``
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``--sws-allow-zimg=<yes|no>``
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Allow using zimg (if the component using the internal swscale wrapper
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Allow using zimg (if the component using the internal swscale wrapper
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@ -4039,6 +4039,15 @@ Software Scaler
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Most things which need software conversion can make use of this.
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Most things which need software conversion can make use of this.
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.. note::
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The builtin ``sws-fast`` profile (which you are supposed to use when you
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use a VO that uses software conversion on weak hardware) sets this
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option. But do note that zimg *may* be slower than libswscale. Usually,
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it's faster on x86 platforms, but slower on ARM (due to lack of ARM
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specific optimizations). The mpv zimg wrapper uses unoptimized repacking
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for some formats, for which zimg cannot be blamed.
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``--zimg-scaler=<point|bilinear|bicubic|spline16|spline36|lanczos>``
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``--zimg-scaler=<point|bilinear|bicubic|spline16|spline36|lanczos>``
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Zimg luma scaler to use (default: lanczos).
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Zimg luma scaler to use (default: lanczos).
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