Siva-Karthi / webp

Automatically exported from code.google.com/p/webp
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when I Convert webp, color is gone?? #235

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago
What steps will reproduce the problem?
1. color is reduce (red color)
2.

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?
windows 8.1 64bit or anyOS
Convert program : XNconvert(http://www.xnview.com/en/xnconvert/) , 
honeyview(http://www.bandisoft.co.kr/honeyview/)

bpg format is better color than webp format

Original issue reported on code.google.com by x86andro...@gmail.com on 25 Dec 2014 at 5:21

Attachments:

GoogleCodeExporter commented 9 years ago
The change in red color is due to YUV420 subsampling.

One way to mitigate this effect is to use the '-pre 4' option in cwebp.

For instance: 

     cwebp -pre 4 source.png -o webp_pre4.webp

Attached is the resulting WebP file (75kB)

Original comment by pascal.m...@gmail.com on 26 Dec 2014 at 4:57

Attachments: