Issue 495 in webp: Animated WebP Frame Extraction Broken - Artifact outputs

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toono… via monorail

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Dec 13, 2020, 10:12:02 PM12/13/20
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Status: New
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Labels: Type-Defect Priority-Medium

New issue 495 by toono...@gmail.com: Animated WebP Frame Extraction Broken - Artifact outputs
https://bugs.chromium.org/p/webp/issues/detail?id=495

What steps will reproduce the problem?
1.Extract any animated WebP files frames


What is the expected output? What do you see instead?

Garbled images


What version of the product are you using? On what operating system?

Latest, windows 10


Please provide any additional information below.

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Yannis Guyon

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Dec 14, 2020, 3:46:07 AM12/14/20
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Could you provide more information about the tool or command line you used? Adding the source animation and the garbled frames as attachment here could also help investigate.
I would recommend the anim_dump tool (can be downloaded through the latest libwebp-*-windows-x64.zip archive):
  anim_dump animation.webp -folder C:/path/to/frames/directory/

jz… via monorail

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Dec 23, 2020, 9:46:38 PM12/23/20
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Labels: Needs-Feedback

Comment #1 on issue 495 by jz...@google.com: Animated WebP Frame Extraction Broken - Artifact outputs
https://bugs.chromium.org/p/webp/issues/detail?id=495#c1

Thanks for the report. Which tool were you using? webpmux or anim_dump? webpmux won't composite the full image, it will just extract individual frames. anim_dump will fully reconstruct the frame.

andre… via monorail

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Aug 9, 2021, 7:22:58 PMAug 9
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Comment #3 on issue 495 by andre...@gmail.com: Animated WebP Frame Extraction Broken - Artifact outputs
https://bugs.chromium.org/p/webp/issues/detail?id=495#c3

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