Closed GoogleCodeExporter closed 9 years ago
I guess i used the webp encoder the wrong way.
Size does increases if conversion :
1. is from lossy to lossless
2. is from lower quality lossy to higher quality lossy
Not an issue with libwebp tools.
Thanks
Original comment by vahbia...@gmail.com
on 4 Jun 2015 at 10:43
Growing in size is frequent when you're recompressing at a quality that is
*larger* than the source. You're just adding bits without adding new
information.
This would happen when recompressing to JPEG for instance. If you take a
regular JPEG, compressed at q=85 and try to re-compress it at q=100, size will
grow too.
Try:
cjpeg -quality 100 -outfile input_new.jpg input.jpg
for instance!
Original comment by pascal.m...@gmail.com
on 4 Jun 2015 at 1:25
ImageMagick's identify is one way to determine the source jpeg quality:
$ identify -verbose image.jpeg |grep Quality
Original comment by jz...@google.com
on 4 Jun 2015 at 9:29
Original issue reported on code.google.com by
vahbia...@gmail.com
on 4 Jun 2015 at 7:08