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[Resolved] possible bug disposal background IM 6.7.7.6
Posted: 2012-06-06T16:36:45-07:00
by fmw42
IM 6.7.7.6 Q16 Mac OSX Snow Leopard
I am not sure if this is a bug or not. But I am lead to believe that -disposal background should clear the frame to transparent background before going on. Anthony's example at
http://www.imagemagick.org/Usage/anim_b ... background seems to be leaving black holes rather than transparent. Do I misunderstand or is this a bug.
Re: possible bug gif animation disposal background IM 6.7.7.
Posted: 2012-06-06T20:18:09-07:00
by anthony
It doesn't for me!
Re: possible bug gif animation disposal background IM 6.7.7.
Posted: 2012-06-06T20:21:47-07:00
by fmw42
anthony wrote:It doesn't for me!
On Safari it has a white background and leaves black squares. On Firefox it has a transparent background and is fine.
So it appears to be a limitation of Safari.
Fred
Re: [Resolved] possible bug disposal background IM 6.7.7.6
Posted: 2012-06-06T21:24:47-07:00
by anthony
I was testing with "animate".
Re: [Resolved] possible bug disposal background IM 6.7.7.6
Posted: 2012-06-06T21:28:41-07:00
by fmw42
anthony wrote:I was testing with "animate".
It was a test for something I am scripting and want to show as an animation on my web site. So I needed to use a browser to test. Too bad Safari is not up to speed on disposal methods in gif animations.
Re: [Resolved] possible bug disposal background IM 6.7.7.6
Posted: 2012-08-19T07:19:15-07:00
by Offshore
Same problem:
convert -delay 15 -dispose background ...files... -channel A -ordered-dither o8x8 result.gif
The result (view on Safari to see the bug, appears on Safari for Windows, on iPad 2, on New iPad, possibly Safari for MacOS and iPad 1):
In Opera, Chrome (webkit engine, as Safari), IE and Firefox everything is fine.