blind

suckless command-line video editing utility
git clone git://git.suckless.org/blind
Log | Files | Refs | README | LICENSE

blind-dual-key.1 (1399B)

      1 .TH BLIND-DUAL-KEY 1 blind
      2 .SH NAME
      3 blind-dual-key - Apply transparency to a video based on two videos and two key
      4 .SH SYNOPSIS
      5 .B blind-dual-key
      6 .I X
      7 .I Y
      8 .I Z
      9 .I dual-X
     10 .I dual-Y
     11 .I dual-Z
     12 .I dual-stream
     13 .SH DESCRIPTION
     14 .B blind-dual-key
     15 reads a video from stdin and a video
     16 .IR dual-stream .
     17 These two videos should be idential, except
     18 with two different background colours. The
     19 background colour used in the video from
     20 stdin should be specified in the arguments
     21 .IR X ,
     22 .IR Y ,
     23 and
     24 .IR Z ,
     25 using the CIE XYZ colour model. The
     26 background colour used in the video from
     27 .I dual-stream
     28 should be specified in the arguments
     29 .IR dual-X ,
     30 .IR dual-Y ,
     31 and
     32 .IR dual-Z ,
     33 using the CIE XYZ colour model. Using this information,
     34 .B blind-dual-key
     35 reconstruct the alpha channel of the video
     36 and prints the video with its alpha channel to
     37 stdout.
     38 .SH NOTES
     39 .B blind-dual-key
     40 may be changed in the future to use some other colour model,
     41 therefore, it is recommended to also use
     42 .BR blind-colour-ciexyz (1)
     43 if you are specifying the colour in CIE XYZ.
     44 .P
     45 When making a video whose transparancy is recovered with
     46 .BR blind-dual-key ,
     47 select to opposite background colours, for
     48 example black and white or green and magenta.
     49 .SH SEE ALSO
     50 .BR blind (7),
     51 .BR blind-colour-ciexyz (1),
     52 .BR blind-colour-srgb (1),
     53 .BR blind-chroma-key (1),
     54 .BR blind-primary-key (1)
     55 .SH AUTHORS
     56 Mattias Andrée
     57 .RI < maandree@kth.se >