https://bugzilla.wikimedia.org/show_bug.cgi?id=28631
--- Comment #5 from Brion Vibber <[email protected]> 2011-04-28 00:54:48 UTC --- I can confirm here with ImageMagick 6.6.2-6 (Ubuntu 10.10 x86_64). The '+map' (along with the -fuzz and layer optimization) was added in r71354 for bug 11822: "I also tried adding +map to reduce to prevent per frame colortables, but this option doesn't deal very well with transparency unfortunately (because it does significantly reduce filesize)." My current man pages don't list the '+map' option for convert, but older ones floating on the internet do: ========================== -map filename choose a particular set of colors from this image. By default, color reduction chooses an optimal set of colors that best represent the original image. Alternatively, you can choose a particular set of colors from an image file with this option. Use +map to reduce all images provided on the command line to a single optimal set of colors that best represent all the images. ========================== The '+map' tells it to rebuild the colormap from the input files, so presumably this is behaving differently from the default (given that it's the same input file, still). Somehow in the process of converting colors we lose some of the transparency, and various chunks of various frames are getting mapped to a non-transparent color by mistake. In theory an animated GIF can have different color maps for each frame, but I don't know if that's a case that's actually hitting stuff. I'm a bit unclear on if/where there's a bug tracker for ImageMagick, but there are forums where you can report bugs in the 'bugs' section. I don't see any entries searching for 'map animated gif'. -- Configure bugmail: https://bugzilla.wikimedia.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. You are on the CC list for the bug. _______________________________________________ Wikibugs-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikibugs-l
