Exporting to Webp color change

[Fookisan]

When I am exporting an image to webp format, the color seems to be significantly duller/muted/less vibrant than the original. When I export it as png or jpg it seems correct. Is this a limitation of webp or is there a color profile change when exporting in photo2? Thanks!

[walt.farrell]

It would help to know

• your OS,
• which app you're using, 
• the color format of the original, and of the export,
• other details of your export parameters.

Also, to have screenshots of the original and the result, and possibly sample documents for both.

[walt.farrell]

33 minutes ago, Red Sands said:

but I don't think webp supports embedded colour profiles - at least they can't be exported from Affinity, as far as I can see.

The WebP specification doesn't mention color profiles as far as I can see, so I suspect they are not supported. And the color format it supports is a bit different than I've seen, and depends on the compression format you specify. I haven't looked to see what Affinity provides in its export options.

From the Google Developer FAQ:

Quote

What color spaces does the WebP format support?

Consistent with the VP8 bitstream, lossy WebP works exclusively with an 8-bit Y'CbCr 4:2:0 (often called YUV420) image format. Please refer to Section 2, "Format Overview" of RFC 6386, VP8 Data Format and Decoding Guide for more detail.

Lossless WebP works exclusively with the RGBA format. See the WebP Lossless Bitstream specification.

 

[Lisbon]

On 12/24/2022 at 1:15 AM, Fookisan said:

When I am exporting an image to webp format, the color seems to be significantly duller/muted/less vibrant than the original... Is this a limitation of webp... ?

It's possible.

In areas of rapid transition from highly saturated/vibrant to less vibrant, the issue you are experiencing becomes more noticeable.

There is an interesting video by Greg Benz where he mentions this limitation. I skipped the video to the part related to your issue.
Greg Benz Photography: Exporting webP files

I believe you can overcome these limitations by tweaking your export settings. Unfortunately, it's only my second day of testing A.Photo v2, so I can't help with that matter.