blind

suckless command-line video editing utility
git clone git://git.suckless.org/blind
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blind-sinc-wave.1 (1409B)

      1 .TH BLIND-SINC-WAVE 1 blind
      2 .SH NAME
      3 blind-sinc-wave - Apply cardinal sine-wave repetition to gradient
      4 .SH SYNOPSIS
      5 .B blind-sinc-wave
      6 [-e]
      7 .RI [ theta0-stream ]
      8 .SH DESCRIPTION
      9 .B blind-sinc-wave
     10 reads a video from stdin, applies a filter to
     11 each channel to it, and prints the result to
     12 stdout. The filter is designed for applying
     13 repetition to a gradient, and thus assumes the
     14 range of visible values is [0, 1]. The applied
     15 filter creates a cardinal sine-wave.
     16 .P
     17 If
     18 .I theta0-stream
     19 is specified, it must be a video with only
     20 one pixel per frame. When applying the sine
     21 function, it is applied to the sum of the
     22 pixel it is applied to and the pixel in
     23 the same frame in
     24 .IR theta0-stream .
     25 .SH NOTES
     26 .BR blind-arithm (1)
     27 with the
     28 .B mul
     29 and
     30 .B div
     31 operators can be used to stretch the wave.
     32 .SH OPTIONS
     33 .TP
     34 .B -e
     35 Apply optimisation that assumes all channels
     36 are identical. If
     37 .I theta0-stream
     38 is specified, the values from its second channel
     39 (the Y channel) are used for all channels.
     40 .SH SEE ALSO
     41 .BR blind (7),
     42 .BR blind-arithm (1),
     43 .BR blind-double-sine-wave (1),
     44 .BR blind-round-wave (1),
     45 .BR blind-sawtooth-wave (1),
     46 .BR blind-sine-wave (1),
     47 .BR blind-triangular-wave (1),
     48 .BR blind-spectrum (1),
     49 .BR blind-cone-gradient (1),
     50 .BR blind-linear-gradient (1),
     51 .BR blind-radial-gradient (1),
     52 .BR blind-spiral-gradient (1),
     53 .BR blind-square-gradient (1)
     54 .SH AUTHORS
     55 Mattias Andrée
     56 .RI < maandree@kth.se >