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img2webp: convert a sequence of images to an animated webp

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Usage:

  img2webp [file-level options] [image files...] [per-frame options...]

File-level options (only used at the start of compression):
 -min_size ............ minimize size
 -loop <int> .......... loop count (default: 0, = infinite loop)
 -kmax <int> .......... maximum number of frame between key-frames
                        (0=only keyframes)
 -kmin <int> .......... minimum number of frame between key-frames
                        (0=disable key-frames altogether)
 -mixed ............... use mixed lossy/lossless automatic mode
 -v ................... verbose mode
 -h ................... this help

Per-frame options (only used for subsequent images input):
 -d <int> ............. frame duration in ms (default: 100)
 -lossless  ........... use lossless mode (default)
 -lossy ... ........... use lossy mode
 -q <float> ........... quality
 -m <int> ............. method to use

example: img2webp -loop 2 in0.png -lossy in1.jpg
                  -d 80 in2.tiff -o out.webp

Change-Id: I23771b90eaf0660f420d7ffd304e704155386286
This commit is contained in:
Pascal Massimino
2016-12-02 11:44:17 +01:00
parent ea72cd60cb
commit 03f40955a3
10 changed files with 493 additions and 4 deletions
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@@ -413,6 +413,37 @@ $ make -f makefile.unix examples/vwebp
> nmake /f Makefile.vc CFG=release-static \
../obj/x64/release-static/bin/vwebp.exe
Animation creation tool:
========================
The utility 'img2webp' can turn a sequence of input images (PNG, JPEG, ...)
into an animated WebP file. It offers fine control over duration, encoding
modes, etc.
Usage:
img2webp [file-level options] [image files...] [per-frame options...]
File-level options (only used at the start of compression):
-min_size ............ minimize size
-loop <int> .......... loop count (default: 0, = infinite loop)
-kmax <int> .......... maximum number of frame between key-frames
(0=only keyframes)
-kmin <int> .......... minimum number of frame between key-frames
(0=disable key-frames altogether)
-mixed ............... use mixed lossy/lossless automatic mode
-v ................... verbose mode
-h ................... this help
Per-frame options (only used for subsequent images input):
-d <int> ............. frame duration in ms (default: 100)
-lossless ........... use lossless mode (default)
-lossy ... ........... use lossy mode
-q <float> ........... quality
-m <int> ............. method to use
example: img2webp -loop 2 in0.png -lossy in1.jpg
-d 80 in2.tiff -o out.webp
Animated GIF conversion:
========================
Animated GIF files can be converted to WebP files with animation using the