GraphicsMagick / Bugs / #660 graphic magic faile when convert webp to gif

Bob Friesenhahn - 2022-01-30

GraphicsMagick does not currently support animated WebP. In my testing I do get data returned but it is just the first frame from the GIF file.

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asd - 2022-01-30

that will be awesome better than no data returned gm 1.3.36

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- Bob Friesenhahn - 2022-01-30
  
  On Sun, 30 Jan 2022, asd wrote:
  
  that will be awesome better than no data returned gm 1.3.36
  
  What is the origin of the GraphicsMagick build you are using? What
  operating system are you using?
  
  Bob
  
  Bob Friesenhahn
  bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
  GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
  Public Key, http://www.simplesystems.org/users/bfriesen/public-key.txt
  
  If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

asd - 2022-01-30

windows 8.1

GraphicsMagick 1.3.36 20201226 Q16 http://www.GraphicsMagick.org/
Copyright (C) 2002-2020 GraphicsMagick Group.
Additional copyrights and licenses apply to this software.
See http://www.GraphicsMagick.org/www/Copyright.html for details.

Feature Support:
Native Thread Safe yes
Large Files (> 32 bit) yes
Large Memory (> 32 bit) yes
BZIP yes
DPS no
FlashPix no
FreeType yes
Ghostscript (Library) no
JBIG yes
JPEG-2000 yes
JPEG yes
Little CMS yes
Loadable Modules yes
Solaris mtmalloc no
Google perftools tcmalloc no
OpenMP yes (200203 "2.0")
PNG yes
TIFF yes
TRIO no
Solaris umem no
WebP yes
WMF yes
X11 no
XML yes
ZLIB yes

Windows Build Parameters:

MSVC Version: 1500

centos 7

GraphicsMagick 1.3.36 20201226 Q16 http://www.GraphicsMagick.org/
Copyright (C) 2002-2020 GraphicsMagick Group.
Additional copyrights and licenses apply to this software.
See http://www.GraphicsMagick.org/www/Copyright.html for details.

Feature Support:
Native Thread Safe yes
Large Files (> 32 bit) yes
Large Memory (> 32 bit) yes
BZIP yes
DPS no
FlashPix no
FreeType yes
Ghostscript (Library) no
JBIG yes
JPEG-2000 yes
JPEG yes
Little CMS yes
Loadable Modules yes
Solaris mtmalloc no
Google perftools tcmalloc no
OpenMP yes (201107 "3.1")
PNG yes
TIFF yes
TRIO no
Solaris umem no
WebP yes
WMF yes
X11 yes
XML yes

If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
- Roberto de Deus Barbosa Murta - 2022-01-30
  
  I downloaded the image and did a quick check, and the file is indeed a gif.
  There is no animated webp (that I know), the equivalent usage for small animations is webm.
  --
  Sent from Yandex.Mail for mobile
  
  18:58, 30 de janeiro de 2022, asd <lolgithubrox@users.sourceforge.net>:
  windows 8.1
  
  GraphicsMagick 1.3.36 20201226 Q16 http://www.GraphicsMagick.org/
  Copyright (C) 2002-2020 GraphicsMagick Group.
  Additional copyrights and licenses apply to this software.
  See http://www.GraphicsMagick.org/www/Copyright.html for details.
  
  Feature Support:
    Native Thread Safe yes
    Large Files (> 32 bit) yes
    Large Memory (> 32 bit) yes
    BZIP yes
    DPS no
    FlashPix no
    FreeType yes
    Ghostscript (Library) no
    JBIG yes
    JPEG-2000 yes
    JPEG yes
    Little CMS yes
    Loadable Modules yes
    Solaris mtmalloc no
    Google perftools tcmalloc no
    OpenMP yes (200203 "2.0")
    PNG yes
    TIFF yes
    TRIO no
    Solaris umem no
    WebP yes
    WMF yes
    X11 no
    XML yes
    ZLIB yes
  
  Windows Build Parameters:
  
    MSVC Version: 1500
  
    centos 7
  
    GraphicsMagick 1.3.36 20201226 Q16 http://www.GraphicsMagick.org/
  Copyright (C) 2002-2020 GraphicsMagick Group.
  Additional copyrights and licenses apply to this software.
  See http://www.GraphicsMagick.org/www/Copyright.html for details.
  
  Feature Support:
    Native Thread Safe yes
    Large Files (> 32 bit) yes
    Large Memory (> 32 bit) yes
    BZIP yes
    DPS no
    FlashPix no
    FreeType yes
    Ghostscript (Library) no
    JBIG yes
    JPEG-2000 yes
    JPEG yes
    Little CMS yes
    Loadable Modules yes
    Solaris mtmalloc no
    Google perftools tcmalloc no
    OpenMP yes (201107 "3.1")
    PNG yes
    TIFF yes
    TRIO no
    Solaris umem no
    WebP yes
    WMF yes
    X11 yes
    XML yes
  
  ---
  
  [bugs:#660] graphic magic faile when convert webp to gif
  
  Status: open
  Group: v1.0_(example)
  Created: Sun Jan 30, 2022 05:29 AM UTC by asd
  Last Updated: Sun Jan 30, 2022 02:50 PM UTC
  Owner: nobody
  
  Use graphic magic in proxy script today got strange errors
  
  I know image has gif extension but its output as animated webp
  https://cdn-www.mandatory.com/assets/uploads/2017/02/0_mandatory_gifs_of_the_week_2_2_17.gif
  
  RIFF WEBPVP8X
  
  save as 1.webp
  then
  
  gm convert 1.webp 2.gif
  
  no data returned
  
  ---
  
  Sent from sourceforge.net because you indicated interest in <https://sourceforge.net/p/graphicsmagick/bugs/660/>
  
  To unsubscribe from further messages, please visit <https://sourceforge.net/auth/subscriptions/>
  
  Related
  
  Bugs: ~~#660~~
  
  If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
  - Roberto de Deus Barbosa Murta - 2022-01-30
    
    Also, try doing the opposit, or converting gif to gif
    
    --
    Sent from Yandex.Mail for mobile
    
    19:06, 30 de janeiro de 2022, Roberto de Deus Barbosa Murta <robertomurta@yandex.com>:
    I downloaded the image and did a quick check, and the file is indeed a gif.
    There is no animated webp (that I know), the equivalent usage for small animations is webm.
    --
    Sent from Yandex.Mail for mobile
    
    18:58, 30 de janeiro de 2022, asd <lolgithubrox@users.sourceforge.net>:
    windows 8.1
    
    GraphicsMagick 1.3.36 20201226 Q16 http://www.GraphicsMagick.org/
    Copyright (C) 2002-2020 GraphicsMagick Group.
    Additional copyrights and licenses apply to this software.
    See http://www.GraphicsMagick.org/www/Copyright.html for details.
    
    Feature Support:
      Native Thread Safe yes
      Large Files (> 32 bit) yes
      Large Memory (> 32 bit) yes
      BZIP yes
      DPS no
      FlashPix no
      FreeType yes
      Ghostscript (Library) no
      JBIG yes
      JPEG-2000 yes
      JPEG yes
      Little CMS yes
      Loadable Modules yes
      Solaris mtmalloc no
      Google perftools tcmalloc no
      OpenMP yes (200203 "2.0")
      PNG yes
      TIFF yes
      TRIO no
      Solaris umem no
      WebP yes
      WMF yes
      X11 no
      XML yes
      ZLIB yes
    
    Windows Build Parameters:
    
      MSVC Version: 1500
    
      centos 7
    
      GraphicsMagick 1.3.36 20201226 Q16 http://www.GraphicsMagick.org/
    Copyright (C) 2002-2020 GraphicsMagick Group.
    Additional copyrights and licenses apply to this software.
    See http://www.GraphicsMagick.org/www/Copyright.html for details.
    
    Feature Support:
      Native Thread Safe yes
      Large Files (> 32 bit) yes
      Large Memory (> 32 bit) yes
      BZIP yes
      DPS no
      FlashPix no
      FreeType yes
      Ghostscript (Library) no
      JBIG yes
      JPEG-2000 yes
      JPEG yes
      Little CMS yes
      Loadable Modules yes
      Solaris mtmalloc no
      Google perftools tcmalloc no
      OpenMP yes (201107 "3.1")
      PNG yes
      TIFF yes
      TRIO no
      Solaris umem no
      WebP yes
      WMF yes
      X11 yes
      XML yes
    
    ---
    
    [bugs:#660] graphic magic faile when convert webp to gif
    
    Status: open
    Group: v1.0_(example)
    Created: Sun Jan 30, 2022 05:29 AM UTC by asd
    Last Updated: Sun Jan 30, 2022 02:50 PM UTC
    Owner: nobody
    
    Use graphic magic in proxy script today got strange errors
    
    I know image has gif extension but its output as animated webp
    https://cdn-www.mandatory.com/assets/uploads/2017/02/0_mandatory_gifs_of_the_week_2_2_17.gif
    
    RIFF WEBPVP8X
    
    save as 1.webp
    then
    
    gm convert 1.webp 2.gif
    
    no data returned
    
    ---
    
    Sent from sourceforge.net because you indicated interest in <https://sourceforge.net/p/graphicsmagick/bugs/660/>
    
    To unsubscribe from further messages, please visit <https://sourceforge.net/auth/subscriptions/>
    
    Related
    
    Bugs: ~~#660~~
    
    If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
    - asd - 2022-02-01
      
      Firefox webp -- Chrome gif
      
      content-length 1087528
      content-type image/webp
      date Tue, 01 Feb 2022 01:18:14 GMT
      
      All this gif webiste somtimes shows gif somtimes webp i think some cache posison on backed.
      
      https://drive.google.com/file/d/1FnLN_CblYgI5OAxHH4KN_kN5mf024689/view?usp=sharing
      
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Bob Friesenhahn - 2022-02-05

Apparently animated WebP is "WEBM". Regardless, this is a RIFF structured format which requires significant re-work of the existing WebP reader regardless of if it reads just one frame, or a sequence. So I think this is a major feature request rather than a "bug".

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Bob Friesenhahn - 2023-01-08

status: open --> closed-invalid

assigned_to: Bob Friesenhahn
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Bob Friesenhahn - 2023-01-08

There is no plan at the moment to support WEBM format.

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