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* build related notes
  * merge vwebp descriptions
  * miscellaneous cosmetics

Change-Id: Ic4e580127bd2c4dff8e5a81ccb10b15a3568f8b1
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James Zern
2013-03-16 12:35:49 -07:00
parent 42b611a491
commit 1e67e8ef9e
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README.mux
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@ -9,9 +9,9 @@ Description:
WebPMux: set of two libraries 'Mux' and 'Demux' for creation, extraction and
manipulation of an extended format WebP file, which can have features like
color profile, metadata, animation and fragmented images. Reference
command-line tools 'webpmux' and 'vwebp' as well as the WebP container
specification 'doc/webp-container-spec.txt' are also provided in this package.
color profile, metadata and animation. Reference command-line tools 'webpmux'
and 'vwebp' as well as the WebP container specification
'doc/webp-container-spec.txt' are also provided in this package.
WebP Mux tool:
==============
@ -45,7 +45,7 @@ SET_OPTIONS:
exif file.exif Set EXIF metadata.
xmp file.xmp Set XMP metadata.
where: 'file.icc' contains the ICC profile to be set,
'file.exif' contains the EXIF metadata to be set and
'file.exif' contains the EXIF metadata to be set
'file.xmp' contains the XMP metadata to be set
STRIP_OPTIONS:
@ -78,29 +78,18 @@ INPUT & OUTPUT are in WebP format.
Note: The nature of EXIF, XMP and ICC data is not checked and is assumed to be
valid.
WebP viewer tool:
================
Visualization tool:
===================
The examples/ directory also contains a tool (vwebp) for viewing WebP files.
It decodes the image and visualizes it using OpenGL.
A list of options is available using the -h command line flag:
> vwebp -h
Decodes the WebP image file and visualize it using OpenGL
Options are:
-version .... print version number and exit.
-nofancy ..... don't use the fancy YUV420 upscaler.
-nofilter .... disable in-loop filtering.
-mt .......... use multi-threading
-info ........ print info.
-h ....... this help message.
It decodes the image and visualizes it using OpenGL. See the libwebp README
for details on building and running this program.
Mux API:
========
The Mux API contains methods for adding data to and reading data from WebP
files. This API currently supports XMP/EXIF metadata, ICC profile, animation
and fragmented images. Other features may be added in subsequent releases.
files. This API currently supports XMP/EXIF metadata, ICC profile and animation.
Other features may be added in subsequent releases.
Example#1 (pseudo code): Creating a WebPMux object with image data, color
profile and XMP metadata.
@ -137,11 +126,11 @@ For a detailed Mux API reference, please refer to the header file
(src/webp/mux.h).
Demux API:
=========
==========
The Demux API enables extraction of images and extended format data from
WebP files. This API currently supports reading of XMP/EXIF metadata, ICC
profile, animation and fragmented images. Other features may be added in
subsequent releases.
profile and animated images. Other features may be added in subsequent
releases.
Code Example: Demuxing WebP data to extract all the frames, ICC profile
and EXIF/XMP metadata.