Comments (1)
heyitsbryanm
commented on July 24, 2024
2
@ChelseaRong Turns out, the artifact is caused by the q parameter being set at a very low value (q=1). Full breakdown of what's happening:
- The parameter
q=1&auto=compressis applied, which renders the lowest quality version of the image- Since the quality is so low, the compressed, rendered version of the image ends up having artifacts (a large blurred line in this case)
- The parameter
auto=formatcauses this issue to show only in some browsers/crawlers- Since social scrapers don't have a detected user agent that supports WebP, we serve the
.jpgversion which compresses at a much lower quality compared to WebP - This is also why we don't see the issue in a browser that supports WebP (such as Chrome or Firefox)
- Since social scrapers don't have a detected user agent that supports WebP, we serve the
To fix this, I'd recommend setting the q parameter to at least 25.
I'll close this issue since it isn't an imgix-core-js bug, but if you need further debugging for the imgix rendering API, contact [email protected].
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