blind-set-luma.1 - blind - suckless command-line video editing utility | |
git clone git://git.suckless.org/blind | |
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blind-set-luma.1 (1125B) | |
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1 .TH BLIND-SET-LUMA 1 blind | |
2 .SH NAME | |
3 blind-set-luma - Multiply the luminosity of a video | |
4 .SH SYNOPSIS | |
5 .B blind-set-luma | |
6 .I luma-stream | |
7 .SH DESCRIPTION | |
8 .B blind-set-luma | |
9 reads a video from stdin and a mask video from | |
10 .IR luma-stream . | |
11 The video is printed to stdout, with the luminosity | |
12 of each pixel multiplied by the product of the | |
13 luminosity and the alpha value of the corresponding | |
14 pixel and frame in the mask video. | |
15 .P | |
16 If stdin is longer than | |
17 .IR luma-stream , | |
18 the remainder of stdin is printed without any changes. | |
19 If stdin is shorter than | |
20 .IR luma-stream , | |
21 the remainder of | |
22 .I luma-stream | |
23 is ignored but may be partially read. | |
24 .SH NOTES | |
25 In most cases, this is not what you want to use, instead | |
26 you probably want to use | |
27 .BR blind-arithm (1) | |
28 to multiple the X, Y and Z values on one value. This | |
29 produces the same affect as reducing the intensity of | |
30 the light sources, which is not what | |
31 .B blind-set-luma | |
32 does. | |
33 .SH SEE ALSO | |
34 .BR blind (7), | |
35 .BR blind-single-colour (1), | |
36 .BR blind-arithm (1), | |
37 .BR blind-set-alpha (1), | |
38 .BR blind-invert-luma (1), | |
39 .BR blind-set-saturation (1) | |
40 .SH AUTHORS | |
41 Mattias Andrée | |
42 .RI < [email protected] > |