oxidctf

oxidctf is a Rust port of HolyWu/VapourSynth-DCTFilter / Mr-Z-2697/VapourSynth-DCTFilter, a VapourSynth plugin that suppresses selected frequencies of a clip. For each n x n block it performs a Discrete Cosine Transform (DCT), scales down the selected frequency values, and then reverses the process with an Inverse Discrete Cosine Transform (IDCT).

Install

pip install vapoursynth-oxidctf

API

oxidctf.DCTFilter(
  clip: vs.VideoNode,
  factors: Sequence[float],
  nsize: int = 8,
  planes: Sequence[int] = [0, 1, 2],
) -> vs.VideoNode

  • clip — Clip to process. Any format with either an integer sample type of 8-16 bit depth or a float sample type of 32 bit depth is supported.

  • factors — Either nsize or nsize * nsize floating point numbers, all of which must be in the range 0.0 <= x <= 1.0.

    With nsize values, these correspond to scaling factors for the rows and columns of the n x n DCT blocks. The leftmost number corresponds to the top row, left column. This is the DC component of the transform and should always be left as 1.0. The row and column numbers are multiplied together to get the scale factor for each of the values in a block.

    With nsize * nsize values, they are used directly as a row-major per-coefficient scaling matrix, which allows patterns that the outer product cannot express.

  • nsize — Size of the DCT blocks.

  • planes — Which planes to process. Any unfiltered planes are copied from the input clip.

Key dates

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License expression

MPL-2.0
View SPDX License List

Requires

Python >=3.12

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