pp7

Apply Postprocessing filter 7. It is variant of the spp filter, similar to spp = 6 with 7 point DCT, where only the center sample is used after IDCT.

The filter accepts the following options:

'qp'

Force a constant quantization parameter. It accepts an integer in range 0 to 63. If not set, the filter will use the QP from the video stream (if available).

'mode'

Set thresholding mode. Available modes are:

'hard'

Set hard thresholding.

'soft'

Set soft thresholding (better de-ringing effect, but likely blurrier).

'medium'

Set medium thresholding (good results, default).