resize2

resize2 extends the standard zimg resizer with custom kernel support (user-defined kernels via a function), a blur parameter to widen filter taps, and force-resize flags for overriding zimg's no-op checks.

Differences from Core Resize

New Method

  • Custom: Allows using a user-defined function as the scaling kernel.
    • custom_kernel: A callback function that takes an input position and returns an evaluated kernel value.
    • taps: The number of filter taps for the custom kernel.

New Parameters

Added to all resizing methods:

  • blur / blur_uv: Multiplier for the filter frequency. Values > 1.0 blur the image, while values < 1.0 sharpen it. blur_uv specifically affects chroma planes.

    Equivalent to fh and fv parameters of fmtc: blur=1.5 == fh=1 / 1.5, fv=1 / 1.5

  • force / force_uv: Boolean flag to force processing even when zimg would typically skip it. force_uv affects chroma.

  • force_h / force_h_uv: Force horizontal processing specifically for luma or chroma.

  • force_v / force_v_uv: Force vertical processing specifically for luma or chroma.

Installation

Pre-compiled wheels are available on PyPI for:

  • Windows: x86_64
  • Linux: x86_64 and aarch64
  • macOS: x86_64 and arm64 (13.0+)
pip install vapoursynth-resize2

Compilation

uv build --wheel

On Windows you may want to add -Csetup-args="--vsenv" to the command.

Project links

Data verified by PyPI on Jul 25, 2026
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Key dates

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  • Released:
Newer release available (0.5.1)

1 maintainer

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GitHub Statistics

Data verified by PyPI on Jul 25, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

LGPL-2.1
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Requires

Python >=3.12

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0.5.1

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0.5.0 This release

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0.4.3

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