blind

suckless command-line video editing utility
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blind-temporal-mean.1 (1597B)


      1 .TH BLIND-TEMPORAL-MEAN 1 blind
      2 .SH NAME
      3 blind-temporal-mean - Calculate the mean over all frames in a video for each pixel
      4 .SH SYNOPSIS
      5 .B blind-temporal-mean
      6 [-d | -g | -h | -l
      7 .I power-stream
      8 | -p
      9 .I power-stream
     10 | -v]
     11 .SH DESCRIPTION
     12 .B blind-temporal-mean
     13 reads a video from stdin and calculates the mean
     14 over all frames for each pixel, and outputs a
     15 single frame video to stdout with the mean for
     16 each pixel.
     17 .P
     18 Unless otherwise specified, the arithmetic mean
     19 is calculated.
     20 .SH OPTIONS
     21 .TP
     22 .B -d
     23 Calculate the standard deviation.
     24 .TP
     25 .B -g
     26 Calculate the geometric mean.
     27 .TP
     28 .B -h
     29 Calculate the harmonic mean.
     30 .TP
     31 .BR -l \ \fIpower-stream\fP
     32 Calculate the Lehmer mean with the power
     33 specified in the same pixel in the single-frame
     34 video
     35 .IR power-stream .
     36 .TP
     37 .BR -p \ \fIpower-stream\fP
     38 Calculate the power mean (Hölder mean) with
     39 the power specified in the same pixel in the
     40 single-frame video
     41 .IR power-stream .
     42 .TP
     43 .B -v
     44 Calculate the variance.
     45 .SH REQUIREMENTS
     46 .B blind-temporal-mean
     47 requires enough free memory to load two full frames memory.
     48 A frame requires 32 bytes per pixel it contains. If
     49 .B -p
     50 or
     51 .B -v
     52 is used, enough free memory to load three full frames
     53 memory is required. If
     54 .B -l
     55 is used, enough free memory to load four full frames
     56 memory is required.
     57 .P
     58 .B blind-temporal-mean
     59 is optimised for simplicity rather than memory usage.
     60 .SH SEE ALSO
     61 .BR blind (7),
     62 .BR blind-temporal-arithm (1),
     63 .BR blind-spatial-arithm (1),
     64 .BR blind-arithm (1),
     65 .BR blind-spatial-mean (1),
     66 .BR blind-mean (1),
     67 .BR blind-rewrite-head (1)
     68 .SH AUTHORS
     69 Mattias Andrée
     70 .RI < maandree@kth.se >