Animated webp - garbled appearance when animation for multipage files are diasbled

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Sprintdriver
Posts: 62
Joined: Mon Feb 02, 2009 11:46 pm

Animated webp - garbled appearance when animation for multipage files are diasbled

Post by Sprintdriver »

When manually scrolling through the frames in an animated webp page using Next/Previous page buttons, only the first opened image looks like intended. All following frames look garbled (i.e. probably XnView simply view one frame at a time with masking, disregarding previous frame instead of adding on top of previous).

The behaviour is the same for the following version combos of XnView and OS:
  • Windows 10, XnView 1.7.1
  • Linux Fedora (Cinnamon spin), XnView 1.6.2 (Flatpak)
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xnview
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Re: Animated webp - garbled appearance when animation for multipage files are diasbled

Post by xnview »

what do you have for second frame?
Pierre.
Sprintdriver
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Re: Animated webp - garbled appearance when animation for multipage files are diasbled

Post by Sprintdriver »

The webp file consist of 8 frames.

The second frame - if rendered properly should look like this:
skjermkopi-anim_08-images_frame2-exported.png
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xnview
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Re: Animated webp - garbled appearance when animation for multipage files are diasbled

Post by xnview »

what do you have in Xn?
Pierre.
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Re: Animated webp - garbled appearance when animation for multipage files are diasbled

Post by Sprintdriver »

Ah, yes - here is how the second frame actually looks on screen
Screenshot from 2024-05-13 18-35-50.png
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xnview
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Re: Animated webp - garbled appearance when animation for multipage files are diasbled

Post by xnview »

the file is opened from browser?
Pierre.
Sprintdriver
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Re: Animated webp - garbled appearance when animation for multipage files are diasbled

Post by Sprintdriver »

xnview wrote: Tue May 14, 2024 1:03 pm the file is opened from browser?

Firefox
firefox_frame-2_filter.png
Brave
brave_frame-2-filter.png
So in both Firefox and Brave, the webp frames appear normally.
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user0
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Re: Animated webp - garbled appearance when animation for multipage files are diasbled

Post by user0 »

from Browser tab of XnViewMP :D

I can't reproduce this issue on a clean unzipped 171, no matter how the file is opened.
Sprintdriver
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Re: Animated webp - garbled appearance when animation for multipage files are diasbled

Post by Sprintdriver »

user0 wrote: Tue May 14, 2024 3:38 pm from Browser tab of XnViewMP :D
Ah, of course, my mistake :)
Screenshot XnView browsingMode frame-2 filtered.png
Here, I've manually shifted to frame 2 by right click on image canvas and "Navigate to --> Next page"
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user0
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Re: Animated webp - garbled appearance when animation for multipage files are diasbled

Post by user0 »

Your file is fine, it's just optimized - 1st frame contains the full image, other frames only contain the changes.
to reproduce:
1. check "Disable GIF/JIF/APNG/ANI animation" (Settings > View > Misc)
2. navigate frames


However, there is an issue in Browser
to reproduce:
0. have clean unzipped version
☐ Disable GIF/JIF/APNG/ANI animation
1. have folder with any animated image and subfolder
2. select image in Browser mode
3. do 'Previous/Next/First/Last page' command (right click on image>Navigate to OR View>Preview>Page OR via custom shortcut)
4. select subfolder
preview turns blank, but image is still cached?
5. repeat step 3
preview will scroll file frames
aomaoyyw
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Re: Animated webp - garbled appearance when animation for multipage files are diasbled

Post by aomaoyyw »

实际上,这个bug在1.7.1版本中还不存在,言下之意,这个webp文件能在我的1.7.1版本中正常显示。但是随着我升级到1.7.2之后,我也遇到了相同的问题,所以才来论坛里寻求帮助 :)
Actually, this bug does not exist in version 1.7.1, which means that this webp file can be displayed normally in my version 1.7.1. But after I upgraded to 1.7.2, I also encountered the same problem, so I came to the forum to seek help :)
——Translated by Google
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xnview
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Re: Animated webp - garbled appearance when animation for multipage files are diasbled

Post by xnview »

aomaoyyw wrote: Sat Jul 20, 2024 8:24 pm 实际上,这个bug在1.7.1版本中还不存在,言下之意,这个webp文件能在我的1.7.1版本中正常显示。但是随着我升级到1.7.2之后,我也遇到了相同的问题,所以才来论坛里寻求帮助 :)
Actually, this bug does not exist in version 1.7.1, which means that this webp file can be displayed normally in my version 1.7.1. But after I upgraded to 1.7.2, I also encountered the same problem, so I came to the forum to seek help :)
——Translated by Google
Please post a webp file
Pierre.