Hqdn3d - FFmpeg

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This is a high precision/quality 3d denoise filter. It aims to reduce image noise, producing smooth images and making still images really still. It should enhance compressibility.

It accepts the following optional parameters: 'luma_spatial'

A non-negative floating point number which specifies spatial luma strength. It defaults to 4.0. 'chroma_spatial'

A non-negative floating point number which specifies spatial chroma strength. It defaults to 3.0*luma_spatial/4.0. 'luma_tmp'

A floating point number which specifies luma temporal strength. It defaults to 6.0*luma_spatial/4.0. 'chroma_tmp'

A floating point number which specifies chroma temporal strength. It defaults to luma_tmp*chroma_spatial/luma_spatial.

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