Opened 7 years ago

Last modified 3 months ago

#4907 open enhancement

Support decoding animated WebP images

Reported by: Urvang Joshi Owned by:
Priority: important Component: avcodec
Version: git-master Keywords: webp
Cc: shaunspiller@gmail.com, pcgeek86@gmail.com, k.bumsik@gmail.com, me@jozen.blue, irdroid3@gmail.com, xanashi@gmail.com, Zipdox Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description

Summary of the bug:
Currently, FFmpeg can encode animated WebPs, but cannot decode them, which is inconvenient for users.

Decoding animated WebPs right now generates "image data not found error" due to "unsupported chunk": ​https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/webp.c#L1504

How to reproduce:
(example input image: ​https://www.gstatic.com/webp/animated/1.webp)

% ffmpeg -i 1.webp 1.gif
ffmpeg version N-75787-g1d4af04 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  configuration: --enable-libwebp
  libavutil      55.  2.100 / 55.  2.100
  libavcodec     57.  4.100 / 57.  4.100
  libavformat    57.  3.100 / 57.  3.100
  libavdevice    57.  0.100 / 57.  0.100
  libavfilter     6. 10.100 /  6. 10.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.100 /  2.  0.100
[webp @ 0x3782940] image data not found
[webp_pipe @ 0x3781360] decoding for stream 0 failed

< Rest of the output truncated >

Attachments (5)

1.webp​ (371.9 KB ) - added by Urvang Joshi 7 years ago.
An animated WebP image
animated.webp​ (36.5 KB ) - added by Josef Zlomek 2 years ago.
Another animated WebP image (RGB)
GP_G8eEAkCHHOP3W.webp​ (66.6 KB ) - added by Josef Zlomek 2 years ago.
Another animated WebP image (YUV)
test_webp_js.webp​ (1.3 MB ) - added by Josef Zlomek 2 years ago.
Non-animated WebP image
test.webp​ (149.7 KB ) - added by Josef Zlomek 2 years ago.
Animated WebP image (YUV) with transparent black surroundings of the object

Download all attachments as: .zip

Change History (21)

by Urvang Joshi, 7 years ago

Attachment: 1.webp​ added

An animated WebP image

comment:1 by Carl Eugen Hoyos, 7 years ago

Keywords: webp added
Priority: normal → wish
Reproduced by developer: set
Status: new → open
Version: unspecified → git-master

comment:2 by nobody, 3 years ago

Cc: shaunspiller@gmail.com added

comment:3 by pcgeek86, 2 years ago

Cc: pcgeek86@gmail.com added

comment:4 by Josef Zlomek, 2 years ago

Cc: josef@zlomek.net added

comment:5 by Josef Zlomek, 2 years ago

Is anybody working on this? I am thinking that I would eventually implement this but do not want to duplicate work.

by Josef Zlomek, 2 years ago

Attachment: animated.webp​ added

Another animated WebP image (RGB)

by Josef Zlomek, 2 years ago

Attachment: GP_G8eEAkCHHOP3W.webp​ added

Another animated WebP image (YUV)

by Josef Zlomek, 2 years ago

Attachment: test_webp_js.webp​ added

Non-animated WebP image

comment:6 by Josef Zlomek, 2 years ago

I am finishing the implementation.

by Josef Zlomek, 2 years ago

Attachment: test.webp​ added

Animated WebP image (YUV) with transparent black surroundings of the object

comment:7 by Josef Zlomek, 2 years ago

Cc: josef@zlomek.net removed

comment:8 by Bumsik Kim, 23 months ago

Cc: k.bumsik@gmail.com added

in reply to:  6 comment:9 by Zennn, 19 months ago

Replying to jzlomek:

I am finishing the implementation.

Has this been implemented yet?

comment:10 by Zennn, 19 months ago

Cc: me@jozen.blue added

comment:11 by Ian Dawson, 17 months ago

Cc: irdroid3@gmail.com added

comment:12 by Grey, 16 months ago

Cc: xanashi@gmail.com added

comment:14 by Rm Beer, 7 months ago

Another file with the same problem:
​https://0x0.st/-FzA.webp - (Link only available in less of 1 year)

comment:15 by Wladimir Leite, 6 months ago

Any update on this?

comment:16 by Zipdox, 3 months ago

Cc: Zipdox added
Priority: wish → important

I propose setting the priority to important. Not being able to decode animated WebP is a huge problem for projects that use FFmpeg for thumbnail generation and image/video scaling.

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