Convertion animated GIF creates black pixels.

[lorcap]

Hi!
This is my original animated GIF.

After conversion:

Code: Select all

> convert.exe orig.gif %04d.jpg

output images covered with black pixels.
Here is 0001.jpg for example.

Why this happening?

Code: Select all

> identify.exe orig.gif
1321211391814.gif[0] GIF 512x288 512x288+0+0 8-bit PseudoClass 256c 1.344MB 0.000u 0:00.000
1321211391814.gif[1] GIF 512x288 512x288+0+0 8-bit PseudoClass 256c 1.344MB 0.000u 0:00.046
...
1321211391814.gif[25] GIF 512x288 512x288+0+0 8-bit PseudoClass 256c 1.344MB 0.031u 0:00.296

> convert.exe -version
Version: ImageMagick 6.7.3-6 2011-11-10 Q16 http://www.imagemagick.org Features: OpenMP

[fmw42]

It appears to be due to your gif animation optimization? this works for me by adding -coalesce

convert orig.gif -coalesce orig_%d.jpg

[lorcap]

Thanks, fmw42!
With -coalesce it's works fine.