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GIF to WebP conversion issue: animation speed #2619
Description
Activity
This would be a good one for community contribution. It’s just timespan conversion stuff.
I looked a bit in the codebase to see if would be something that I might be able to do, and I think I stumbled on the bug:
This seems to be a conversion from a
Timespanto anuintthat should contain the duration in milliseconds. It uses.Millisecondsbut should instead use.TotalMilliseconds.For a Timespan of 5.5 seconds
Millisecondswould be 500, butTotalMillisecondswould be 5500.Reacted by James Jackson-South and Joel SweetmanThat'll be it then! My tests all contain sub-second frames so I never picked it up. Thanks for looking! 👍
Prerequisites
DEBUGandRELEASEmodeImageSharp version
3.1.1
Other ImageSharp packages and versions
ImageSharp.Web 3.1.0
Environment (Operating system, version and so on)
Windows 11
.NET Framework version
.NET 8
Description
When I saw that animated WebP encoding support landed, I started investigating it ASAP.
Our websites are full of animated GIF images, if we can automatically convert these to WebP using ImageSharp.Web (with acceptable quality) we can potentially save a lot of bandwidth.
On a first glance the quality seems fine, but there one problem. The animation speed of most images is way too high.
Steps to Reproduce
format=webpImages
Image (both original GIF and resulting WebP, I used a .zip file because GitHub does not allow uploading WebP):
aug_2022.zip