Issue 560 in webp: Animation not Working on Mobile

[marac… via monorail]

Status: New
Owner: ----
Labels: Type-Defect Priority-Medium

New issue 560 by marac...@gmail.com: Animation not Working on Mobile
https://bugs.chromium.org/p/webp/issues/detail?id=560

What steps will reproduce the problem?
1. Run the following Python script to generate a WebP animation based on the pictures:
import glob, webp

from PIL import Image
def make_webp(frame_folder):
frames = [Image.open(image) for image in glob.glob(f"{frame_folder}/*.JPG")]
webp.save_images(frames, 'test4.webp', fps=0.75, lossless=True)

if __name__ == "__main__":
make_webp("path/to/image/folder")

2.Upload the WebP file and try accessing it from a mobile browser.

What is the expected output? What do you see instead?
The expected output is for the animation to run just like on desktop browsers, instead it stays static. Same applies to the latest Google Photos and Google Drive versions.

What version of the product are you using? On what operating system?
I used Chrome 98.0.4758.101, on AndroidOne 11

Please provide any additional information below.

Attachments:
IMG_20210801_205900.jpg 3.3 MB
IMG_20210801_210436.jpg 3.1 MB
IMG_20210801_210953.jpg 3.4 MB
IMG_20210801_211226.jpg 3.3 MB
IMG_20210801_211445.jpg 2.6 MB
IMG_20210801_211836.jpg 3.3 MB
IMG_20210801_212036.jpg 2.1 MB
IMG_20210801_212154.jpg 3.0 MB

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[jz… via monorail]

Updates:
Status: Invalid

Comment #1 on issue 560 by jz...@google.com: Animation not Working on Mobile
https://bugs.chromium.org/p/webp/issues/detail?id=560#c1

Sorry for the slow reply. In Chrome 102 the animation [1] works for me on desktop and Android.

In drive on desktop the full size image works. Previews in drive on web and in the app seem to use a still image. I thought the restriction might be size related so I resized this to 256x192. At that resolution in the drive app the thumbnail will work, but clicking through to the preview is still shown as a still image.

If you're still seeing an issue in chrome it would be better to file something at https://bugs.chromium.org/p/chromium. For other products it would be helpful if you could file feedback either on the site or in the app. Looking quickly I don't see any related issues. I'll see if we can follow up with the teams.

I'm going to close this as it's not related to an issue in libwebp. Thank you for bringing it to our notice, though.

[1] https://storage.googleapis.com/downloads.webmproject.org/tmp/crbug-webp-560/test4-crbug-webp-560.webp

[jz… via monorail]

Comment #2 on issue 560 by jz...@google.com: Animation not Working on Mobile
https://bugs.chromium.org/p/webp/issues/detail?id=560#c2

I filed a bug internally against drive referencing this bug.