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WebP Discussion

1–30 of 1590

Welcome to webp-discuss

This is the place to ask everything about WebP, the image compression format.

Main page: https://developers.google.com/speed/webp/
Bug tracker: https://issues.webmproject.org/

Discussions are rather technical most of the time, but not always!

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Apr 10

cwp2 does not accept a PNG file (WebP 2, libwebp2)

Please disregard this thread. There is no problem with the commit. It seems there was something wrong

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cwp2 does not accept a PNG file (WebP 2, libwebp2)

Please disregard this thread. There is no problem with the commit. It seems there was something wrong

Apr 10

Apr 9

The build of libwebp2 (WebP 2) fails with MSVC error C7555

I confirmed that the issue has been resolved. Thank you very much. 2025年4月8日火曜日 9:37:53 UTC+9

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The build of libwebp2 (WebP 2) fails with MSVC error C7555

I confirmed that the issue has been resolved. Thank you very much. 2025年4月8日火曜日 9:37:53 UTC+9

Apr 9

adit...@gmail.com, … CNCVelMart7

Apr 8

The Windows Explorer WEBP codec

Thanks, view webp file windows7, filebrowser, image(midle to extra large) mode. Previously, I could

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The Windows Explorer WEBP codec

Thanks, view webp file windows7, filebrowser, image(midle to extra large) mode. Previously, I could

Apr 8

Dima, James Zern3

Mar 13

Can webp animations be streamed?

On Wed, Mar 12, 2025 at 3:38 PM James Zern <jz...@google.com> wrote: Hi, On Tue, Mar 4, 2025 at

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Can webp animations be streamed?

On Wed, Mar 12, 2025 at 3:38 PM James Zern <jz...@google.com> wrote: Hi, On Tue, Mar 4, 2025 at

Mar 13

clark zheng, James Zern4

Mar 12

Cross-compiling error

On Wed, Mar 12, 2025 at 4:02 PM clark zheng <clarkz...@gmail.com> wrote: Hi, thanks for the

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Cross-compiling error

On Wed, Mar 12, 2025 at 4:02 PM clark zheng <clarkz...@gmail.com> wrote: Hi, thanks for the

Mar 12

Jason Carswell, … James Zern6

Mar 3

FastStone + WebP = I just want it to work.

On Thu, Feb 27, 2025 at 2:49 AM Dashkovsky <sun...@gmail.com> wrote: since i have discovered

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FastStone + WebP = I just want it to work.

On Thu, Feb 27, 2025 at 2:49 AM Dashkovsky <sun...@gmail.com> wrote: since i have discovered

Mar 3

Feb 25

Multiple errors occur during the build of libwebp2(WebP 2)

I have confirmed that the issue has been resolved. Thank you very much. 2025年2月22日土曜日 13:40:29 UTC+9

unread,

Multiple errors occur during the build of libwebp2(WebP 2)

I have confirmed that the issue has been resolved. Thank you very much. 2025年2月22日土曜日 13:40:29 UTC+9

Feb 25

Serge, … James Zern7

Feb 21

Comparative Analysis on WebP and JPEG Decoding Performance

On Wed, Feb 19, 2025 at 4:25 PM James Zern <jz...@google.com> wrote: Hi, On Tue, Feb 18, 2025

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Comparative Analysis on WebP and JPEG Decoding Performance

On Wed, Feb 19, 2025 at 4:25 PM James Zern <jz...@google.com> wrote: Hi, On Tue, Feb 18, 2025

Feb 21

Panagiotis Paraskeva, … Rishabh Gupta11

Feb 9

Android import for Libwebp

hey i checkout your repo, it's not support transparent background earlier i use this repo

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Android import for Libwebp

hey i checkout your repo, it's not support transparent background earlier i use this repo

Feb 9

Jan 23

Re: Issue 391092769: Bitmap.Clone() doesn't always honor requested PixelFormat and thus results in Stackoverflow in Encode() recursion.

Ok On Thu, 23 Jan 2025, 10:00 pm , <buganize...@google.com> wrote: Replying to this email

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Re: Issue 391092769: Bitmap.Clone() doesn't always honor requested PixelFormat and thus results in Stackoverflow in Encode() recursion.

Ok On Thu, 23 Jan 2025, 10:00 pm , <buganize...@google.com> wrote: Replying to this email

Jan 23

Mathias Schindler

Jan 2

Steganography using WebP

In 2023, Katarzyna Koptyra and Marek R. Ogiela published "An Efficient Steganographic Protocol

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Steganography using WebP

In 2023, Katarzyna Koptyra and Marek R. Ogiela published "An Efficient Steganographic Protocol

Jan 2

Linda Cannon, … James Zern6

12/21/24

Bulk conversions?

Glad to hear it. If you have any other questions please feel free to ask. On Fri, Dec 20, 2024 at 5:

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Bulk conversions?

Glad to hear it. If you have any other questions please feel free to ask. On Fri, Dec 20, 2024 at 5:

12/21/24

12/20/24

[ANN] libwebp 1.5.0 release candidate

Hi, On Fri, Dec 13, 2024 at 12:42 PM James Zern <jz...@google.com> wrote: Hi, Source and binary

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[ANN] libwebp 1.5.0 release candidate

Hi, On Fri, Dec 13, 2024 at 12:42 PM James Zern <jz...@google.com> wrote: Hi, Source and binary

12/20/24

Etienne Loiseau, … Efren Bravo20

12/5/24

Webp in gmail / transparency issues

December 2024 and the problem persists. regards. On Thursday, August 15, 2024 at 12:55:38 PM UTC-4

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Webp in gmail / transparency issues

December 2024 and the problem persists. regards. On Thursday, August 15, 2024 at 12:55:38 PM UTC-4

12/5/24

William Borg Barthet, James Zern2

11/12/24

WebP for Java applications

Hi, On Tue, Nov 12, 2024 at 6:38 AM William Borg Barthet <william.b...@bloomreach.com>

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WebP for Java applications

Hi, On Tue, Nov 12, 2024 at 6:38 AM William Borg Barthet <william.b...@bloomreach.com>

11/12/24

Tim Janik, James Zern4

11/7/24

Feature Request: Add -sharp_yuv Command Line Option for Improved GIF to WEBP Conversion

On Mon, Nov 4, 2024 at 1:53 PM James Zern <jz...@google.com> wrote: On Mon, Nov 4, 2024 at 11:

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Feature Request: Add -sharp_yuv Command Line Option for Improved GIF to WEBP Conversion

On Mon, Nov 4, 2024 at 1:53 PM James Zern <jz...@google.com> wrote: On Mon, Nov 4, 2024 at 11:

11/7/24

Joshex Dirad, James Zern2

11/5/24

Making a webp addon for legacy browsers

Hi, On Tue, Nov 5, 2024 at 10:07 AM Joshex Dirad <jos...@world-of-nintendo.com> wrote: I'm

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Making a webp addon for legacy browsers

Hi, On Tue, Nov 5, 2024 at 10:07 AM Joshex Dirad <jos...@world-of-nintendo.com> wrote: I'm

11/5/24

Dan Weaver, … ayan4

9/15/24

Webp In GDrawings, GSlides, GDocs: UNSUPPORTED Image Type

yeah I don't think WebP is coming to GSuite anytime soon... On Sunday, September 15, 2024 at 2:12

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Webp In GDrawings, GSlides, GDocs: UNSUPPORTED Image Type

yeah I don't think WebP is coming to GSuite anytime soon... On Sunday, September 15, 2024 at 2:12

9/15/24

Aaaaaa, Frank Altpeter (frank42)2

9/14/24

Google doesn't support its own image format?!

I just came across a similar experience. Google Drawings doesn't support webp either (importing

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Google doesn't support its own image format?!

I just came across a similar experience. Google Drawings doesn't support webp either (importing

9/14/24

8/27/24

A bug report for Webp 2(libwebp2)

The issue has been confirmed to be fixed in commit 318fa1dd2d7d91658d7bd38917b0fb0e0e243a16. Thank

unread,

A bug report for Webp 2(libwebp2)

The issue has been confirmed to be fixed in commit 318fa1dd2d7d91658d7bd38917b0fb0e0e243a16. Thank

8/27/24

广州老林, Yannis Guyon2

8/19/24

Coff2omf problem

Thank you for your interest in libwebp. Could you describe where your libwebp.lib file comes from,

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Coff2omf problem

Thank you for your interest in libwebp. Could you describe where your libwebp.lib file comes from,

8/19/24

7/18/24

WebM/WebP Issue Tracker migration starts now

This is complete. The new tracker is live at https://issues.webmproject.org/. On Thu, Jul 18, 2024 at

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WebM/WebP Issue Tracker migration starts now

This is complete. The new tracker is live at https://issues.webmproject.org/. On Thu, Jul 18, 2024 at

7/18/24

w… via monorail, … gdee… via monorail9

7/17/24

Issue 643 in webp: libwebp WASM decoding performance

Comment #8 on issue 643 by w...@utexas.edu: libwebp WASM decoding performance https://bugs.chromium.

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Issue 643 in webp: libwebp WASM decoding performance

Comment #8 on issue 643 by w...@utexas.edu: libwebp WASM decoding performance https://bugs.chromium.

7/17/24

7/17/24

webm/webp monorail to buganizer migration

As you might be aware, Chromium moved over to a new issue tracker earlier this year [1]. We're

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webm/webp monorail to buganizer migration

As you might be aware, Chromium moved over to a new issue tracker earlier this year [1]. We're

7/17/24

tha… via monorail, jz… via monorail4

7/16/24

Issue 646 in webp: "Canvas Assembly from Frames" in spec is incomplete and misleading

Comment #3 on issue 646 by jz...@google.com: "Canvas Assembly from Frames" in spec is

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Issue 646 in webp: "Canvas Assembly from Frames" in spec is incomplete and misleading

Comment #3 on issue 646 by jz...@google.com: "Canvas Assembly from Frames" in spec is

7/16/24

victo… via monorail, … jz… via monorail9

7/11/24

Issue 644 in webp: Undefined symbols for architecture arm64: _SharpYuvConvert

Updates: Status: Done Comment #8 on issue 644 by jz...@google.com: Undefined symbols for architecture

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Issue 644 in webp: Undefined symbols for architecture arm64: _SharpYuvConvert

Updates: Status: Done Comment #8 on issue 644 by jz...@google.com: Undefined symbols for architecture

7/11/24

jz… via monorail, … Git Watcher via monorail8

7/11/24

Issue 499 in webp: [x86] lossless asm/C mismatch w/gcc 8-10, clang 11

Comment #7 on issue 499 by Git Watcher: [x86] lossless asm/C mismatch w/gcc 8-10, clang 11 https://

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Issue 499 in webp: [x86] lossless asm/C mismatch w/gcc 8-10, clang 11

Comment #7 on issue 499 by Git Watcher: [x86] lossless asm/C mismatch w/gcc 8-10, clang 11 https://

7/11/24

victo… via monorail, vrab… via monorail2

7/4/24

Issue 645 in webp: Undefined symbols for architecture arm64: _SharpYuvConvert

Updates: Mergedinto: 644 Status: Duplicate Comment #1 on issue 645 by vra...@google.com: Undefined

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Issue 645 in webp: Undefined symbols for architecture arm64: _SharpYuvConvert

Updates: Mergedinto: 644 Status: Duplicate Comment #1 on issue 645 by vra...@google.com: Undefined

7/4/24

Sumit Mahipal, Roshan Baliga2

7/2/24

Could you say a little more about what you're trying to do? Kali is Debian-based, so it should

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Could you say a little more about what you're trying to do? Kali is Debian-based, so it should

7/2/24

Yongzhi Liao, James Zern2

6/25/24

Hi, On Mon, Jun 24, 2024 at 10:44 AM Yongzhi Liao <liaoyon...@gmail.com> wrote: Hello, I

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Hi, On Mon, Jun 24, 2024 at 10:44 AM Yongzhi Liao <liaoyon...@gmail.com> wrote: Hello, I

6/25/24