[wp-trac] [WordPress Trac] #53653: Scaled down WebP images may be with much larger file size than the original

[WordPress Trac]

#53653: Scaled down WebP images may be with much larger file size than the original
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 Reporter:  azaozz                     |       Owner:  (none)
     Type:  defect (bug)               |      Status:  new
 Priority:  normal                     |   Milestone:  5.8
Component:  Media                      |     Version:  trunk
 Severity:  normal                     |  Resolution:
 Keywords:  needs-patch needs-testing  |     Focuses:
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Comment (by mikeschroder):

 Replying to [comment:3 adamsilverstein]:
 > In [attachment:"53653.diff"]
 > * Only use lossless format for WebP output when header detection
 determines image is lossless.
 >
 > Fixes previous logic to favor using lossy format as default <snip>

 Tested this, and it looks to do as expected so far.

 It would be even better if we could detect lossless images more accurately
 (there are still `VP8L` images located within files that begin with `VP8X`
 sections, which core is currently not detecting), but I agree that it's
 much better to default to assuming we should save as lossy than lossless.

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Ticket URL: <https://core.trac.wordpress.org/ticket/53653#comment:5>
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