This is the command dwebp that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
dwebp - decompress a WebP file to an image file
SYNOPSIS
dwebp [options] input_file.webp
DESCRIPTION
This manual page documents the dwebp command.
dwebp decompresses WebP files into PNG, PAM, PPM or PGM images.
OPTIONS
The basic options are:
-h Print usage summary.
-version
Print the version number (as major.minor.revision) and exit.
-o string
Specify the name of the output file (as PNG format by default). Using "-" as
output name will direct output to 'stdout'.
-- string
Explicitly specify the input file. This option is useful if the input file starts
with an '-' for instance. This option must appear last. Any other options
afterward will be ignored. If the input file is "-", the data will be read from
stdin instead of a file.
-bmp Change the output format to uncompressed BMP.
-tiff Change the output format to uncompressed TIFF.
-pam Change the output format to PAM (retains alpha).
-ppm Change the output format to PPM (discards alpha).
-pgm Change the output format to PGM. The output consists of luma/chroma samples instead
of RGB, using the IMC4 layout. This option is mainly for verification and debugging
purposes.
-yuv Change the output format to raw YUV. The output consists of luma/chroma-U/chroma-V
samples instead of RGB, saved sequentially as individual planes. This option is
mainly for verification and debugging purposes.
-nofancy
Don't use the fancy upscaler for YUV420. This may lead to jaggy edges (especially
the red ones), but should be faster.
-nofilter
Don't use the in-loop filtering process even if it is required by the bitstream.
This may produce visible blocks on the non-compliant output, but it will make the
decoding faster.
-dither strength
Specify a dithering strength between 0 and 100. Dithering is a post-processing
effect applied to chroma components in lossy compression. It helps by smoothing
gradients and avoiding banding artifacts.
-nodither
Disable all dithering (default).
-mt Use multi-threading for decoding, if possible.
-crop x_position y_position width height
Crop the decoded picture to a rectangle with top-left corner at coordinates
(x_position, y_position) and size width x height. This cropping area must be fully
contained within the source rectangle. The top-left corner will be snapped to even
coordinates if needed. This option is meant to reduce the memory needed for
cropping large images. Note: the cropping is applied before any scaling.
-scale width height
Rescale the decoded picture to dimension width x height. This option is mostly
intended to reducing the memory needed to decode large images, when only a small
version is needed (thumbnail, preview, etc.). Note: scaling is applied after
cropping.
-v Print extra information (decoding time in particular).
-noasm Disable all assembly optimizations.
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