New version of libwebp (version 0.1.99) with Alpha & Lossless is rolled out today. - WebP Discussion

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Message from discussion New version of libwebp (version 0.1.99) with Alpha & Lossless is rolled out today.
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Date: Fri, 20 Jul 2012 16:21:53 -0700
Message-ID: <CAKkUsvxM-dJR-AZtOpkT-GOFNg9um2Om6WQBAMs7dCkD5Rp...@mail.gmail.com>
Subject: Re: New version of libwebp (version 0.1.99) with Alpha & Lossless is
 rolled out today.
From: Pascal Massimino <pascal.massim...@gmail.com>
To: webp-disc...@webmproject.org
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Hi,

On Fri, Jul 20, 2012 at 3:07 PM, Vikas Arora <vik...@google.com> wrote:

> Hi -
>
> Last few months, WebP team has been working on adding two enhancement
> features to WebP format v.i.z Alpha Channel support and Lossless
> support. Today we pushed out the next version of libwebp (ver 0.1.99<https://code.google.com/p/webp/downloads/list>),
> that contains these two features. The archives are available at [1] and the
> git repository has been tagged 'v0.1.99'. The iOS-App has been updated too
> with the latest codec and WIC coded will be updated soon. This is a
> pre-release of version 0.2.0, to allow for further incompatible changes
> based on user feedback.  We encourage community to try out these two
> features and provide any feedback on the format.
>
> Last week we also published the study<https://developers.google.com/speed/webp/docs/webp_lossless_alpha_study> with
> compression and decompression characteristics of WebP with these two (Alpha
> & Lossless) newly added features and compared them with libpng and pngout.
> It was shown in the study that with these two new features, 97% of the
> Lossless (PNG) web images can be better compressed and one can relatively
> easily change these from PNG to WebP format. WebP with default compression
> settings can compress 34% better than libpng and 25% better than pngout.
> This suggests that WebP is promising for speeding up image heavy websites.
>
> In addition to adding these two new features, following changes (from NEWS
> file) have been done since last release (V0.1.3):
> - Add TIFF input support to cwebp (webp encoder).
> - Deprecated function WebPINew() has been removed.
> - Decode function signatures have changed to consistently use size_t
> over int/uint32_t.
> - decode_vp8.h is no longer installed system-wide.
>
>
note also that the doc site has been updated to incorporate the latest
changes,<https://gerrit.chromium.org/gerrit/#patch,sidebyside,27962,1,ChangeLog>too.
In particular:

  * the API description:  https://developers.google.com/speed/webp/docs/api
  * the RIFF container description:
https://developers.google.com/speed/webp/docs/riff_container

As Vikas mentioned, this release is about having a frozen API that
incorporates transparency
and lossless support (transparently [pun intended!] for high-level
functions). ABI should be stabilized too.
Underneath, of course, things are still open to feedback if it appears
something is really missing or
vastly sub-optimal! The goal is to have the bitstream spec frozen in 0.2.0
to something we're
fully comfortable with.
Meanwhile, expect some parameter tuning and default settings adjustments on
the road to 0.2.0.

Also, there's more container additions to come post 0.2.0 (actually, some
code is already
in the tree, cf. src/mux/*), but let's take a moment to be sure the new
chunks are fit to the intended
use (tiles, animation, color profile, etc.)

skal

[1]: http://code.google.com/p/webp/downloads/list
>
> Thanks & Regards,
> Vikas
>
>  --
> You received this message because you are subscribed to the Google Groups
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> To post to this group, send email to webp-disc...@webmproject.org.
> To unsubscribe from this group, send email to
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> For more options, visit this group at
> http://groups.google.com/a/webmproject.org/group/webp-discuss/?hl=en.
>

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Hi,<br><br><div class=3D"gmail_quote">On Fri, Jul 20, 2012 at 3:07 PM, Vika=
s Arora <span dir=3D"ltr">&lt;<a href=3D"mailto:vik...@google.com" target=
=3D"_blank">vik...@google.com</a>&gt;</span> wrote:<br><blockquote class=3D=
"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding=
-left:1ex">
Hi -<div><br></div><div>Last few months, WebP team has been working on addi=
ng two enhancement features to WebP format v.i.z Alpha Channel support and =
Lossless support.=A0Today we pushed out the next version of libwebp (<a hre=
f=3D"https://code.google.com/p/webp/downloads/list" target=3D"_blank">ver 0=
.1.99</a>), that contains these two features. The archives are available at=
 [1] and the git repository has been tagged &#39;v0.1.99&#39;. The iOS-App =
has been updated too with the latest codec and WIC coded will be updated so=
on.=A0This=A0is a pre-release of version 0.2.0, to allow for further=A0inco=
mpatible changes based on user feedback.=A0=A0We encourage community to try=
 out these two features and provide any feedback on the format.</div>

<div><br></div><div>Last week we also=A0published the <a href=3D"https://de=
velopers.google.com/speed/webp/docs/webp_lossless_alpha_study" target=3D"_b=
lank">study</a>=A0with compression and decompression characteristics of Web=
P with these two (Alpha &amp; Lossless) newly added features and compared t=
hem with libpng and pngout. It was shown in the study that with these two n=
ew features, 97% of the Lossless (PNG) web images can be better compressed =
and one can relatively easily change these from PNG to WebP format. WebP wi=
th default compression settings can compress 34% better than libpng and 25%=
 better than pngout. This suggests that WebP is promising for speeding up i=
mage heavy websites.</div>

<div><br></div><div>In addition to adding these two new features, following=
=A0changes (from NEWS file) have been done since last release (V0.1.3):</di=
v><div>-=A0Add TIFF input support to cwebp (webp encoder).</div><div><div>
- Deprecated function WebPINew() has been removed.</div>
<div>- Decode function signatures have changed to consistently use size_t o=
ver=A0int/uint32_t.</div><div>- decode_vp8.h is no longer installed system-=
wide.</div></div><div><br></div></blockquote><div><br></div><div>note also =
that the doc site has been updated to incorporate the <a href=3D"https://ge=
rrit.chromium.org/gerrit/#patch,sidebyside,27962,1,ChangeLog">latest change=
s,</a> too. In particular:</div>
<div><br></div><div>=A0 * the API description: =A0<a href=3D"https://develo=
pers.google.com/speed/webp/docs/api">https://developers.google.com/speed/we=
bp/docs/api</a></div><div>=A0 * the RIFF container description:=A0<a href=
=3D"https://developers.google.com/speed/webp/docs/riff_container">https://d=
evelopers.google.com/speed/webp/docs/riff_container</a></div>
<div><br></div><div>As Vikas mentioned, this release is about having a froz=
en API that incorporates transparency</div><div>and lossless support=A0(tra=
nsparently [pun intended!] for=A0high-level functions). ABI should be stabi=
lized too.</div>
<div>Underneath, of course, things are still open to feedback if it appears=
 something is really missing or</div><div>vastly sub-optimal! The goal is t=
o have the bitstream spec frozen in 0.2.0 to something we&#39;re</div><div>
fully comfortable with.</div><div>Meanwhile, expect some parameter tuning a=
nd default settings adjustments=A0on the road to 0.2.0.</div><div>=A0</div>=
<div>Also, there&#39;s more container additions to come post 0.2.0 (actuall=
y, some code is already</div>
<div>in the tree, cf. src/mux/*), but let&#39;s take a moment to be sure th=
e new chunks are fit to the intended</div><div>use (tiles, animation, color=
 profile, etc.)</div><div><br></div><div>skal</div><div><br></div><blockquo=
te class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc so=
lid;padding-left:1ex">
<div></div><div><span style=3D"color:rgb(34,34,34);font-size:12.49999904632=
5684px;font-family:arial,sans-serif">[1]:=A0</span><a href=3D"http://code.g=
oogle.com/p/webp/downloads/list" style=3D"color:rgb(17,85,204);font-size:12=
.499999046325684px;font-family:arial,sans-serif" target=3D"_blank">http://c=
ode.google.com/p/webp/downloads/list</a></div>

<div><br></div><div>Thanks &amp; Regards,</div><div>Vikas</div><span class=
=3D"HOEnZb"><font color=3D"#888888"><div><br></div>

<p></p>

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</font></span></blockquote></div><br>

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