imagemagick: 对损坏的gif图做拆分(ImageMagick 6.9.10)

一，对正常的gif图拆分:

[lhdop@blog img2]$ identify maoshu.gif
maoshu.gif[0] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[1] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[2] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[3] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[4] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[5] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[6] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[7] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[8] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[9] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[10] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[11] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[12] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[13] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[14] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[15] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[16] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[17] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[18] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[19] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[20] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[21] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[22] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[23] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[24] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[25] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[26] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[27] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[28] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.001
maoshu.gif[29] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.000
maoshu.gif[30] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.000
maoshu.gif[31] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.000
maoshu.gif[32] GIF 400x224 400x224+0+0 8-bit sRGB 256c 0.000u 0:00.000
maoshu.gif[33] GIF 400x224 400x224+0+0 8-bit sRGB 256c 1.84787MiB 0.000u 0:00.000
[lhdop@blog img2]$ convert maoshu.gif maoshu.png
[lhdop@blog img2]$ ls
a.jpeg     maoshu-0.png   maoshu-13.png  maoshu-17.png  maoshu-20.png  maoshu-24.png  maoshu-28.png  maoshu-31.png  maoshu-4.png  maoshu-8.png  yz.gif
b.png      maoshu-10.png  maoshu-14.png  maoshu-18.png  maoshu-21.png  maoshu-25.png  maoshu-29.png  maoshu-32.png  maoshu-5.png  maoshu-9.png
dog49.png  maoshu-11.png  maoshu-15.png  maoshu-19.png  maoshu-22.png  maoshu-26.png  maoshu-2.png   maoshu-33.png  maoshu-6.png  maoshu.gif
dog.gif    maoshu-12.png  maoshu-16.png  maoshu-1.png   maoshu-23.png  maoshu-27.png  maoshu-30.png  maoshu-3.png   maoshu-7.png  red.png

说明：对图片做identify时没有报错表示图片没有损坏

说明：convert时会用gif文件名加-帧数做为文件名

gif图:

 

提取的第9帧

 

说明：刘宏缔的架构森林是一个专注架构的博客，

网站：https://blog.imgtouch.com
本文: https://blog.imgtouch.com/index.php/2023/06/03/imagemagick-dui-sun-huai-de-gif-tu-zuo-chai-fen-imagemagick/

         对应的源码可以访问这里获取： https://github.com/liuhongdi/
         或: https://gitee.com/liuhongdi

说明：作者:刘宏缔 邮箱: 371125307@qq.com

二，处理损坏的gif

1,convert时报错

[lhdop@blog img2]$ convert dog.gif dog.png
convert: corrupt image `dog.gif' @ error/gif.c/DecodeImage/513.
convert: corrupt image `dog.gif' @ error/gif.c/ReadGIFImage/1389.
convert: no images defined `dog.png' @ error/convert.c/ConvertImageCommand/3226.

用identify查看:

[lhdop@blog img2]$ identify dog.gif
dog.gif[0] GIF 250x250 250x250+0+0 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[1] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[2] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[3] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[4] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[5] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[6] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[7] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[8] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[9] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[10] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[11] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[12] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[13] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[14] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[15] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[16] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[17] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[18] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[19] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[20] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[21] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[22] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[23] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[24] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[25] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[26] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[27] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[28] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[29] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[30] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[31] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[32] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[33] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[34] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[35] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[36] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[37] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[38] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[39] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[40] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[41] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[42] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[43] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[44] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[45] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[46] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[47] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[48] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[49] GIF 248x248 250x250+1+1 8-bit sRGB 32c 0.000u 0:00.002
dog.gif[50] GIF 248x248 250x250+1+1 8-bit sRGB 32c 901120B 0.000u 0:00.002
identify: corrupt image `dog.gif' @ error/gif.c/PingGIFImage/965.

用identify查看时有corrupt报错提示

2,解决:

可以逐帧提取:

[lhdop@blog img2]$ convert dog.gif[49] dog-49.png
[lhdop@blog img2]$ ls
a.jpeg  b.png  dog-49.png  dog49.png  dog.gif  maoshu.gif  red.png  yz.gif
[lhdop@blog img2]$ convert dog.gif[50] dog-50.png
convert: corrupt image `dog.gif' @ error/gif.c/DecodeImage/513.
convert: corrupt image `dog.gif' @ error/gif.c/ReadGIFImage/1389.
convert: no images defined `dog-50.png' @ error/convert.c/ConvertImageCommand/3226.

3,例子中用到gif图:

 

提取的第49帧

 

三，查看imagemagick的版本:

[lhdop@blog img]$ convert -version
Version: ImageMagick 6.9.10-86 Q16 x86_64 2020-01-13 https://imagemagick.org
Copyright: © 1999-2020 ImageMagick Studio LLC
License: https://imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP(4.5)
Delegates (built-in): bzlib cairo fftw fontconfig freetype gslib gvc jbig jng jp2 
jpeg lcms ltdl lzma openexr pangocairo png ps raqm raw rsvg tiff webp wmf x xml zlib