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81140d514f
Reencoding animated WebPs into JPEG loses all frames except the first one.
Avatars we still reencode because we don't want animated avatars anyway.
animated.webp is produced with this script using Pillow 12.3.0:
```
#!/usr/bin/env python3
from PIL import Image, ImageOps
with Image.open("avatar900x900.png") as im:
frames = [im.rotate(x) for x in range(10, 360, 10)]
im.save(
"animated.webp",
"webp",
append_images=frames,
lossless=True,
duration=200,
save_all=True,
)
```
Resulting image is 677K, just slightly larger than the size needed to trigger reencoding.