FFmpeg 4.3.8
Since* 4.2
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Sharpen or blur the input video.

It accepts the following parameters:

luma_msize_x, lx

Set the luma matrix horizontal size. Range is [1, 23] and default value is 5.

luma_msize_y, ly

Set the luma matrix vertical size. Range is [1, 23] and default value is 5.

luma_amount, la

Set the luma effect strength. Range is [-10, 10] and default value is 1.0.

Negative values will blur the input video, while positive values will sharpen it, a value of zero will disable the effect.

chroma_msize_x, cx

Set the chroma matrix horizontal size. Range is [1, 23] and default value is 5.

chroma_msize_y, cy

Set the chroma matrix vertical size. Range is [1, 23] and default value is 5.

chroma_amount, ca

Set the chroma effect strength. Range is [-10, 10] and default value is 0.0.

Negative values will blur the input video, while positive values will sharpen it, a value of zero will disable the effect.

All parameters are optional and default to the equivalent of the string ’5:5:1.0:5:5:0.0’.

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Examples

  • Apply strong luma sharpen effect:

    -i INPUT -vf "hwupload, unsharp_opencl=luma_msize_x=7:luma_msize_y=7:luma_amount=2.5, hwdownload" OUTPUT
  • Apply a strong blur of both luma and chroma parameters:

    -i INPUT -vf "hwupload, unsharp_opencl=7:7:-2:7:7:-2, hwdownload" OUTPUT