FFmpeg 3.0.12
Since* 2.6
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Change video quantization parameters (QP).

The filter accepts the following option:

qp

Set expression for quantization parameter.

The expression is evaluated through the eval API and can contain, among others, the following constants:

known

1 if index is not 129, 0 otherwise.

qp

Sequentional index starting from -129 to 128.

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Examples

  • Some equation like:

    qp=2+2*sin(PI*qp)