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normalize example exit status

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Use EXIT_SUCCESS / EXIT_FAILURE in most cases as more granularity isn't
useful. For anim_diff, use 0 (success), 1 (image difference) and 2
(error) to align it with other diff utilities (diff, etc.).

Bug: webp:637
Change-Id: I52925de8622a5a4d2141883279d69a1d95ef9b12
This commit is contained in:
James Zern
2024-04-30 18:18:23 -07:00
parent edc289092a
commit a67ff735a2
19 changed files with 139 additions and 72 deletions
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9
man/img2webp.1
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@ -1,5 +1,5 @@
.\" Hey, EMACS: -*- nroff -*-
.TH IMG2WEBP 1 "March 17, 2023"
.TH IMG2WEBP 1 "April 30, 2024"
.SH NAME
img2webp \- create animated WebP file from a sequence of input images.
.SH SYNOPSIS
@ -89,6 +89,13 @@ Specify the compression method to use. This parameter controls the
trade off between encoding speed and the compressed file size and quality.
Possible values range from 0 to 6. Default value is 4.
.SH EXIT STATUS
If there were no problems during execution, \fBimg2webp\fP exits with the value
of the C constant \fBEXIT_SUCCESS\fP. This is usually zero.
.PP
If an error occurs, \fBimg2webp\fP exits with the value of the C constant
\fBEXIT_FAILURE\fP. This is usually one.
.SH EXAMPLE
img2webp -loop 2 in0.png -lossy in1.jpg -d 80 in2.tiff -o out.webp
.br