Static WebP/SVG emojis falsely detected as animated in community settings

(#4061) Bug Confirmed P3 emoji

1h agoby _ edited

Reproduction steps

Go to Community settings > Emoji
Upload various static images of .webp or .svg format
Verify whether they are appropriately categorised

Unfortunately I can't seem to narrow down what traits are causing this, as even images from the same source are sometimes registered as static and others as animated, when they are all static. Of the attached images, this is how they were categorised upon upload:

Emoji	Type
blender.svg	Animated
2.webp	Static
3.webp	Static
4.webp	Animated
5.webp	Static
6.webp	Animated
7.webp	Static
8.webp	Animated

Expected behaviour

Static images would be categorised as static.

Actual behaviour

Certain static images are registered as animated.

2.webp
1000×1000 | 67 kB Link to 2.webp
3.webp
1000×1000 | 78 kB Link to 3.webp
Play animation Stop animation 4.webp

4.webp
1000×1000 | 82 kB Link to 4.webp
5.webp
1000×1000 | 86 kB Link to 5.webp
Play animation Stop animation 6.webp

6.webp
1000×1000 | 111 kB Link to 6.webp
7.webp
1000×1000 | 87 kB Link to 7.webp
Play animation Stop animation 8.webp

8.webp
1000×1000 | 60 kB Link to 8.webp

blender.svg 3 kB Link to blender.svg

Fullest changed the status from Needs triage to Confirmed 1h ago

History

1 comment

FullestReviewer 1 vote 1h ago

I think this might just be because of the files themselves.

❯ ffprobe 3.webp -hide_banner
Input #0, webp_pipe, from '3.webp':
  Duration: N/A, bitrate: N/A
  Stream #0:0: Video: webp, argb, 1000x1000, 25 fps, 25 tbr, 25 tbn

❯ ffprobe 4.webp -hide_banner
[webp @ 0x562a123f7900] skipping unsupported chunk: ANIM
[webp @ 0x562a123f7900] skipping unsupported chunk: ANMF
[webp @ 0x562a123f7900] image data not found
[webp_pipe @ 0x562a123f67c0] Could not find codec parameters for stream 0 (Video: webp, none): unspecified size
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, webp_pipe, from '4.webp':
  Duration: N/A, bitrate: N/A
  Stream #0:0: Video: webp, none, 25 fps, 25 tbr, 25 tbn

If you ignore the errors these are mostly the same, but there are some minor differences, and the errors might actually tell us something about how fluxer is interpreting these files. In any case, I can reproduce the issue so I'll pass this along.

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