{"id":288,"date":"2022-03-13T12:19:49","date_gmt":"2022-03-13T04:19:49","guid":{"rendered":"https:\/\/www.hgostand.com\/?p=288"},"modified":"2022-03-23T15:27:15","modified_gmt":"2022-03-23T07:27:15","slug":"gif-%e6%96%87%e4%bb%b6%e7%9a%84%e4%b8%80%e4%ba%9b%e7%89%b9%e6%80%a7","status":"publish","type":"post","link":"https:\/\/wite.oxoooo.com\/?p=288","title":{"rendered":"GIF \u6587\u4ef6\u7684\u4e00\u4e9b\u7279\u6027"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">\u5927\u591a\u6570\u4eba\u773c\u4e2d\u7684 gif<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b63\u5982\u5927\u591a\u6570\u4eba\u6240\u77e5\u9053\u7684\u90a3\u6837\uff0cgif \u662f\u4e00\u79cd\u52a8\u753b\u6587\u4ef6\u683c\u5f0f\u3002\u4f60\u53ef\u80fd\u770b\u8fc7 gif \u6587\u4ef6\u7684\u4fe1\u606f\uff0c\u89c9\u5f97\u8fd9\u4e9b\u6587\u4ef6\u53ef\u771f\u591f\u5927\u7684\u3002\u4e5f\u8bb8\u4f60\u770b\u4e86\u5b83\u4eec\u540e\u4f1a\u60f3\uff1a\u54c7\uff0c\u8fd9\u4e9b\u56fe\u7247\u7684\u6e05\u6670\u5ea6\u597d\u4f4e\u554a\u3002\u4f46\u4e0d\u7ba1\u600e\u6837\uff0c\u63d0\u5230 gif \u65f6\uff0c\u4f60\u5bf9\u5b83\u7684\u5370\u8c61\u5e94\u8be5\u5c31\u662f\u4e00\u79cd\u77ed\u5c0f\u7684\u52a8\u753b\u6587\u4ef6\u683c\u5f0f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u800c\uff0c\u8fd9\u79cd\u7528\u4f8b\u548c\u7f16\u5199 gif \u7684\u5f00\u53d1\u8005\u6240\u671f\u671b\u7684\u7528\u9014\u5927\u76f8\u5f84\u5ead\u3002\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u6df1\u5165\u4e86\u89e3 gif \u6587\u4ef6\u7684\u7ed3\u6784\uff0c\u5e76\u5728\u8fd9\u4e00\u8fc7\u7a0b\u4e2d\u8ba8\u8bba\u5b83\u7684\u4e00\u4e9b\u6709\u8da3\u7279\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bf7\u6ce8\u610f\uff0c\u8fd9\u7bc7\u6587\u7ae0\u8981\u63a2\u7d22\u7684\u662f\u5982\u4f55\u7406\u89e3 gif \u683c\u5f0f\u8fd9\u4e00\u4e3b\u9898\uff0c\u5e76\u8003\u5bdf\u5b83\u7684\u4e00\u4e9b\u66f4\u6df1\u5965\u7684\u7279\u6027\u3002\u5982\u679c\u4f60\u60f3\u6df1\u5165\u5b66\u4e60\u5982\u4f55\u89e3\u6790 gif \u6587\u4ef6\uff0c\u6211\u63a8\u8350\u4ee5\u4e0b\u8fd9\u4e9b\u8d44\u6e90\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>W3<a href=\"https:\/\/www.w3.org\/Graphics\/GIF\/spec-gif89a.txt\" target=\"_blank\" rel=\"noreferrer noopener\">\u89c4\u8303<\/a><\/li><li>Matthew Flickinger\uff1a<a href=\"http:\/\/www.matthewflickinger.com\/lab\/whatsinagif\/\" target=\"_blank\" rel=\"noreferrer noopener\">gif\u91cc\u6709\u4ec0\u4e48<\/a>\uff1f<\/li><li>\u6211\u53d1\u73b0 ntfs.com \u7684\u8fd9\u4efd<a href=\"https:\/\/www.ntfs.com\/gif-signature-format.htm\" target=\"_blank\" rel=\"noreferrer noopener\">\u6307\u5357<\/a>\u4e5f\u53ef\u4ee5\u5e2e\u52a9\u5165\u95e8<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5199\u6587\u7ae0\u7684\u65f6\u5019\u6211\u5b9e\u9645\u4e0a\u7528\u8fd9\u4e9b\u8d44\u6e90\u505a\u4e86\u4e00\u4e2a\u52c9\u5f3a\u7b26\u5408\u8981\u6c42\u7684 gif \u89e3\u6790\u5668\uff0c\u540d\u4e3a<a href=\"https:\/\/gitlab.com\/DarrienG\/awful-gif\" target=\"_blank\" rel=\"noreferrer noopener\">awful-gif<\/a>\uff0c\u53ef\u4ee5\u89e3\u6790\u4e00\u4e9b gif\u3002\u6211\u4e0d\u5efa\u8bae\u5927\u5bb6\u4f7f\u7528\u5b83\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u8fdb\u5165\u6b63\u9898\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">gif \u7684\u5386\u53f2<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">gif \u6587\u4ef6\u683c\u5f0f\u662f\u7531 Compuserve \u5728 1987 \u5e74\u521b\u5efa\u7684\u3002\u5728 1987 \u5e74\u7684\u65f6\u5019\uff0cgif \u8fd8\u662f\u4e00\u4e2a\u76f8\u5f53\u7d27\u51d1\u7684\u683c\u5f0f\uff01\u5b83\u4f7f\u7528\u4e86\u538b\u7f29\u65b9\u6cd5\uff0c\u800c\u4e14\u4e0d\u662f\u4e00\u822c\u7684\u538b\u7f29\u65b9\u6cd5\uff0c\u800c\u662f LZW \u538b\u7f29\u6280\u672f\u3002\u8bb8\u591a\u65e7\u7684\u6587\u4ef6\u683c\u5f0f\uff08\u5176\u4e2d\u6709\u4e9b\u662f Compuserve \u5236\u4f5c\u7684\uff09\u4f7f\u7528\u7684\u5219\u662f RLE\uff08Run Length Encoding\uff09\uff0c\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\u6548\u7387\u6ca1\u90a3\u4e48\u9ad8\u3002gif \u7684\u4e00\u4e2a\u91cd\u8981\u53d6\u80dc\u56e0\u7d20\u5c31\u662f\u5176\u826f\u597d\u7684\u538b\u7f29\u7387\u548c\u8272\u57df\uff08\u5168 256 \u8272\uff0c\u592a\u68d2\u4e86\uff01\uff09\u3002\uff08\u6ce8 1\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e24\u5e74\u540e\uff0cgif \u6587\u4ef6\u683c\u5f0f\u52a0\u5165\u4e86\u8865\u5145\u5185\u5bb9\uff08gif89a\uff09\uff0c\u589e\u52a0\u4e86\u8bb8\u591a\u6211\u4eec\u4eca\u5929\u4f17\u6240\u5468\u77e5\u548c\u559c\u7231\u7684\u7279\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7 gif89a<a href=\"https:\/\/www.w3.org\/Graphics\/GIF\/spec-gif89a.txt\" target=\"_blank\" rel=\"noreferrer noopener\">\u89c4\u8303<\/a>\uff0c\u6211\u4eec\u53ef\u4ee5\u5feb\u901f\u603b\u7ed3\u51fa gif89 \u4e0e gif87a \u652f\u6301\u7684\u6240\u6709\u7279\u6027\u7684\u533a\u522b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>Appendix<\/code><code>A. Quick Reference Table.<\/code><code>Block Name                  Required   Label       Ext.   Vers.<\/code><code>Application Extension       Opt. (*)   0xFF (255)  yes    89a<\/code><code>Comment Extension           Opt. (*)   0xFE (254)  yes    89a<\/code><code>Global Color Table          Opt. (1)   none        no     87a<\/code><code>Graphic Control Extension   Opt. (*)   0xF9 (249)  yes    89a<\/code><code>Header                      Req. (1)   none        no     N\/A<\/code><code>Image Descriptor            Opt. (*)   0x2C (044)  no     87a (89a)<\/code><code>Local Color Table           Opt. (*)   none        no     87a<\/code><code>Logical Screen Descriptor   Req. (1)   none        no     87a (89a)<\/code><code>Plain Text Extension        Opt. (*)   0x01 (001)  yes    89a<\/code><code>Trailer                     Req. (1)   0x3B (059)  no     87a<\/code><code>Unlabeled Blocks<\/code><code>Header                      Req. (1)   none        no     N\/A<\/code><code>Logical Screen Descriptor   Req. (1)   none        no     87a (89a)<\/code><code>Global Color Table          Opt. (1)   none        no     87a<\/code><code>Local Color Table           Opt. (*)   none        no     87a<\/code><code>Graphic-Rendering Blocks<\/code><code>Plain Text Extension        Opt. (*)   0x01 (001)  yes    89a<\/code><code>Image Descriptor            Opt. (*)   0x2C (044)  no     87a (89a)<\/code><code>Control Blocks<\/code><code>Graphic Control Extension   Opt. (*)   0xF9 (249)  yes    89a<\/code><code>Special Purpose Blocks<\/code><code>Trailer                     Req. (1)   0x3B (059)  no     87a<\/code><code>Comment Extension           Opt. (*)   0xFE (254)  yes    89a<\/code><code>Application Extension       Opt. (*)   0xFF (255)  yes    89a<\/code><code>legend:           (1)   if present, at most one occurrence<\/code><code>                  (*)   zero or more occurrences<\/code><code>                  (+)   one or more occurrences<\/code><code><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u6ca1\u6709\u8bfb\u8fc7\u6574\u4efd\u89c4\u8303\u7684\u4eba\u4eec\u6765\u8bf4\uff0c\u8fd9\u91cc\u9762\u7684\u5927\u90e8\u5206\u5185\u5bb9\u53ef\u8c13\u4e0d\u77e5\u6240\u4e91\uff0c\u6240\u4ee5\u8ba9\u6211\u4eec\u8ba8\u8bba\u4e00\u4e0b gif \u662f\u5982\u4f55\u7ec4\u5408\u5728\u4e00\u8d77\u7684\uff0c\u987a\u4fbf\u518d\u8c08\u8c08\u5b83\u7684\u4e00\u4e9b\u5947\u602a\u4e4b\u5904\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6211\u4eec\u5f00\u59cb\u4e4b\u524d\uff0c\u5148\u4ece\u89c4\u8303\u4e2d\u627e\u4e9b\u4e50\u8da3\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>Appendix<\/code><code>D. Conventions.<\/code><code><br><\/code><code>Animation - The Graphics Interchange Format is not intended as a platform for<\/code><code>animation, even though it can be done in a limited way.<\/code><code><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u9644\u5f55<\/p><\/blockquote>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>D.\u516c\u7ea6\u3002<\/p><\/blockquote>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u52a8\u753b\u2014\u2014\u8fd9\u4e2a\u56fe\u5f62\u4ea4\u6362\u683c\u5f0f\u4e0d\u662f\u8981\u6210\u4e3a\u4e00\u4e2a\u52a8\u753b\u5e73\u53f0\uff0c\u5c3d\u7ba1\u5b83\u5728\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u53ef\u4ee5\u505a\u5230\u8fd9\u4e00\u70b9\u3002<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">gif \u7684\u7ed3\u6784<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u6211\u4f1a\u7528\u4e00\u4e2a\u4f8b\u5b50\u6765\u5177\u4f53\u5206\u6790\u3002\u5982\u679c\u4f60\u60f3\u8ddf\u7740\u505a\uff0c\u4e0b\u8f7d\u5b83\u5373\u53ef\u3002\uff08\u6ce8 2\uff09<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"220\" height=\"261\" src=\"https:\/\/www.hgostand.com\/wp-content\/uploads\/2022\/03\/hgostand1.gif\" alt=\"\" class=\"wp-image-290\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f60\u5728\u5bb6\u91cc\u8ddf\u7740\u5b66\uff0c\u53ea\u9700\u8981\u4e00\u53f0\u5b89\u88c5\u6709 hexdump \u5de5\u5177\u7684\u673a\u5668\u5373\u53ef\u3002\u6211\u8981\u7528\u7684\u662f xxd\uff0c\u5b83\u9884\u88c5\u5728\u5927\u591a\u6570 unix \u7cfb\u7edf\uff08Linux\u3001macOS\uff09\u4e0a\uff0c\u6216\u8005\u53ef\u4ee5\u901a\u8fc7<a href=\"https:\/\/stackoverflow.com\/questions\/36179338\/official-fedora-package-for-xxd-command\" target=\"_blank\" rel=\"noreferrer noopener\">vim-common<\/a>\u5305\u5b89\u88c5\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>gif \u5934<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bcf\u4e2a gif \u90fd\u4ee5\u4e00\u4e2a\u5934\u5f00\u59cb\uff0c\u5176\u4e2d\u7684 magic \u4f4d\u6807\u5fd7\u7740\u5b83\u662f\u4ec0\u4e48\u7c7b\u578b\u7684 gif\uff0c\u8fd8\u6709\u4e00\u70b9\u989d\u5916\u7684\u4fe1\u606f\uff0c\u63d0\u4f9b\u5173\u4e8e\u56fe\u50cf\u7684\u57fa\u672c\u7ec6\u8282\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? xxd Sunflower_as_gif_websafe_89a.gif | head -1 # and some arrows<\/code><code>00000000: -&gt; 4749 4638 3961 &lt;- dc00 0501 f700 0002 0102  gif89a..........<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7528 xxd \u53ef\u4ee5\u8f7b\u677e\u628a gif \u5934\u4fe1\u606f\u89e3\u7801\u4e3a ascii\uff08\u5982\u679c\u5b83\u6709\u610f\u4e49\u7684\u8bdd\uff09\u3002\u770b\u770b\u4e0a\u9762\u7684\u5185\u5bb9\u5199\u7740\uff0cgif89a\uff01\u8fd9\u662f\u4e00\u4e2a\u7ecf\u8fc7\u8ba4\u8bc1\u7684\u6709\u6548 gif!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bcf\u4e2a\u5b57\u6bcd\u90fd\u662f\u4e00\u4e2a\u5b57\u8282\uff0c\u6240\u4ee5\u6211\u4eec\u5728\u8fd9\u91cc\u8981\u627e\u7684 magic \u5b57\u8282\u662f\uff1a0x47\u3001\uff1b0x49\u30010x46\u30010x38\u30010x39\u30010x61\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53e6\u5916\uff0c\u6700\u540e\u4e09\u4e2a\u5b57\u8282\u53ef\u80fd\u662f\uff1a0x38\u30010x37\u30010x61\uff0c\u5982\u679c\u53ea\u652f\u6301 gif87a \u6587\u4ef6\u683c\u5f0f\u4f1a\u662f\u8fd9\u6837\u3002\u6211\u4eec\u4e3b\u8981\u7814\u7a76 gif89\uff0c\u8001\u7248\u672c\u7684\u683c\u5f0f\u5c31\u4e00\u5e26\u800c\u8fc7\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u5916 gif \u5934\u91cc\u9762\u5c31\u6ca1\u6709\u4ec0\u4e48\u6709\u8da3\u7684\u4e1c\u897f\u4e86\uff0c\u56e0\u4e3a\u5b83\u53ea\u662f\u9759\u6001\u6587\u672c\uff0c\u6240\u4ee5\u6211\u4eec\u7ee7\u7eed\u5f80\u524d\u8d70\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u5148\u7b49\u4e00\u4e0b\u95ee\u4e2a\u95ee\u9898\uff1a\u8c01\u4f1a\u63a5\u53d7 gif87a \u5462\uff1f<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u7814\u7a76 gif \u65f6\uff0c\u6211\u60f3\u770b\u770b\u4e3b\u8981\u7684 gif \u6258\u7ba1\u4f9b\u5e94\u5546\u662f\u5426\u4f1a\u63a5\u53d7\u548c\u4fdd\u7559 gif87a \u89c4\u8303\u7684\u683c\u5f0f\u3002\u5b83\u4eec\u80fd\u6b63\u5e38\u4f7f\u7528\u5417\uff0c\u8fd8\u662f\u8bf4\u53ea\u80fd\u62a5\u9519\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u6211\u4eec\u4e4b\u524d\u770b\u5230\u7684\u5411\u65e5\u8475\u7684 gif87a \u7248\u672c\u3002\u8fd9\u4e2a\u7248\u672c\u53ea\u7528\u5728\u8fd9\u91cc\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"250\" height=\"297\" src=\"https:\/\/www.hgostand.com\/wp-content\/uploads\/2022\/03\/hgostand2.gif\" alt=\"\" class=\"wp-image-291\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u6765\u628a\u56fe\u50cf\u4e0a\u4f20\u5230 4 \u5bb6\u5934\u90e8 gif \u6258\u7ba1\u4f9b\u5e94\u5546\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/tenor.com\/view\/gif-24508919\" target=\"_blank\" rel=\"noreferrer noopener\">tenor<\/a><\/li><li><a href=\"https:\/\/giphy.com\/gifs\/BtZghZWUX9XwYWLKHv\" target=\"_blank\" rel=\"noreferrer noopener\">giphy<\/a><\/li><li><a href=\"https:\/\/i.imgur.com\/aUxm3NN.gif\" target=\"_blank\" rel=\"noreferrer noopener\">imgur<\/a><\/li><li>gfycat<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u5f00\u59cb\u7684\u65f6\u5019 gif \u5934\u662f\u8fd9\u6837\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? xxd Sunflower_as_gif_websafe_gif87a.gif | head -1<\/code><code>00000000: 4749 4638 3761 fa00 2901 f500 00ff cc33  gif87a..)......3<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u662f\u91cd\u65b0\u4e0b\u8f7d\u6211\u521a\u4e0a\u4f20\u7684\u56fe\u7247\u540e\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tenor \u91cd\u7f16\u7801\u4e3a gif89a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? Downloads xxd tenor.gif | head -1<\/code><code>00000000: 4749 4638 3961 a401 f201 f700 0006 0406  gif89a..........<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">giphy \u91cd\u7f16\u7801\u4e3a gif89a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? Downloads xxd giphy.gif | head -1<\/code><code>00000000: 4749 4638 3961 fa00 2901 f525 0000 0000  gif89a..)..%....<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u5b9e\u8fd9\u6709\u70b9\u5ffd\u60a0\u4eba\uff0cgiphy <strong>\u53ea<\/strong>\u63a5\u53d7\u52a8\u753b\u5f62\u5f0f\u7684 gif\uff0c\u6240\u4ee5\u6211\u4eec\u5fc5\u987b\u70b9\u51fb\u7f16\u8f91\u6309\u94ae\uff08\u663e\u793a\u5e27\u7f16\u8f91\u5668\uff09\uff0c\u7136\u540e\u70b9\u51fb\u5b8c\u6210\u624d\u884c\u3002gif87a \u89c4\u8303\u4e2d\u5141\u8bb8\u5b58\u50a8\u591a\u5f20\u56fe\u7247\uff0c\u4f46\u5b83\u4eec\u4e0d\u80fd\u6709\u5ef6\u8fdf\uff08\u56e0\u6b64\u6ca1\u6709\u52a8\u753b\uff0c\u89c1\u6ce8 3\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">imgur \u4fdd\u7559\u4e86\u539f\u59cb\u6587\u4ef6\uff01\uff01\uff01<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? Downloads xxd aUxm3NN.gif | head -1<\/code><code>00000000: 4749 4638 3761 fa00 2901 f500 00ff cc33  gif87a..)......3<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u81f3\u4e8e gfycat\uff0c\u5b83\u4e00\u76f4\u5361\u5728\u6700\u540e\u7684\u201c\u7f16\u7801\u201c\u9636\u6bb5\u6574\u6574 20 \u5206\u949f\u3002\u5e0c\u671b\u6211\u6ca1\u6709\u5728\u5468\u672b\u8ba9\u4ed6\u4eec\u7684\u4e00\u4f4d\u53ef\u601c\u7684\u5de5\u7a0b\u5e08\u770b\u5230\u4ec0\u4e48\u8b66\u62a5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0a\u7b80\u77ed\u5206\u6790\u8868\u660e\uff0c\u7531\u4e16\u754c\u4e0a\u6700\u5927\u7684\u4e24\u5bb6\u79d1\u6280\u516c\u53f8\u6240\u6709\u7684\u4e24\u5bb6\u6700\u5927\u7684\u6258\u7ba1\u4f9b\u5e94\u5546\u5e76\u4e0d\u5c0a\u91cd\u6211\u7684\u65e7 gif \u6587\u4ef6\uff0c\u800c\u662f\u5b8c\u5168\u91cd\u5199\u4e86\u5b83\u3002\u4e8b\u5b9e\u4e0a\uff0c\u5bf9\u4e8e giphy \u8fd9\u5bb6\u516c\u53f8\u6765\u8bf4\uff0c\u5b83\u4f3c\u4e4e\u53ea\u5c0a\u91cd\u4e00\u79cd gif&#8230;&#8230;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u603b\u4e4b\u56de\u5230\u63a2\u7d22\u6587\u4ef6\u683c\u5f0f\u7684\u8bdd\u9898\u4e0a\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u903b\u8f91\u5c4f\u5e55\u63cf\u8ff0\u7b26<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u90a3\u4e48\u4f60\u7684\u56fe\u50cf\u662f\u5982\u4f55\u663e\u793a\u6210\u67d0\u4e2a\u5206\u8fa8\u7387\u7684\u5462\uff1f\u5047\u8bbe\u6211\u4eec\u5728 macOS \u7684 Preview \u4e2d\u4f7f\u7528\u201cget info\u201c\u7279\u6027\uff0c\u5b83\u662f\u600e\u4e48\u77e5\u9053\u8fd9\u5f20\u56fe\u7247\u662f 220&#215;261 \u7684\uff1f<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"377\" height=\"969\" src=\"https:\/\/www.hgostand.com\/wp-content\/uploads\/2022\/03\/hgostand3.webp\" alt=\"\" class=\"wp-image-292\" srcset=\"https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand3.webp 377w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand3-117x300.webp 117w\" sizes=\"(max-width: 377px) 100vw, 377px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fe1\u4e0d\u4fe1\u7531\u4f60\uff0c\u8fd9\u662f\u5728\u6587\u4ef6\u683c\u5f0f\u4e2d\u5185\u7f6e\u7684\uff01\uff08\u6ce8 4\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b57\u8282 0x6-0xA \u5c31\u662f\u8fd9\u90e8\u5206\u4fe1\u606f\uff0c\u53e6\u5916\u8fd8\u52a0\u4e86\u70b9\u5185\u5bb9\u3002\u5b57\u8282 0x6 \u548c 0x8 \u6307\u7684\u662f\u957f\u5ea6\u548c\u5bbd\u5ea6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? xxd Sunflower_as_gif_websafe_89a.gif | head -1 # and some arrows<\/code><code>00000000:  4749 4638 3961 -&gt; dc00 0501 &lt;- f700 0002 0102  gif89a..........<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bcf\u4e2a\u7ef4\u5ea6\u6709\u4e24\u4e2a\u5b57\u8282\u6765\u6307\u5b9a\u5927\u5c0f\u3002\u540c\u6837\u4e00\u5b9a\u8981\u8bb0\u4f4f\uff0cgif \u6587\u4ef6\u683c\u5f0f\u4e2d\u7684\u6240\u6709\u5b57\u8282\u90fd\u88ab\u6307\u5b9a\u4e3a\u5c0f endian\uff08\u6ce8 5\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\u662f\u5bbd\u5ea6\uff0c\u662f 0x00dc\uff08\u4ece dc00 \u91cd\u65b0\u6392\u5e8f\uff09=&gt; 220\uff08\u5341\u8fdb\u5236\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u540e\u662f\u957f\u5ea6\uff0c\u662f 0x0105\uff08\u4ece 0501 \u91cd\u65b0\u6392\u5e8f\uff09=&gt; 261\uff08\u5341\u8fdb\u5236\uff09\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u6162\u7740\uff0c\u8fd9\u662f\u5426\u610f\u5473\u7740\u6211\u4eec\u7684 gif \u6709\u4e00\u4e2a\u5206\u8fa8\u7387\u9650\u5236\uff1f<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5c31\u5bf9\u4e86\uff01\u56e0\u4e3a\u6bcf\u4e2a\u4f4d\u7f6e\u53ea\u6709\u4e24\u4e2a\u5b57\u8282\uff0c\u6240\u4ee5\u5bbd\u5ea6\u6216\u957f\u5ea6\u90fd\u4e0d\u80fd\u5927\u4e8e 65535\u3002\u6211\u4eec\u53ef\u4ee5\u5c1d\u8bd5\u5728 gimp \u4e2d\u5236\u4f5c\u4e00\u4e2a 1&#215;65536 \u7684\u65b0 gif \u6765\u9a8c\u8bc1\u8fd9<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"402\" height=\"195\" src=\"https:\/\/www.hgostand.com\/wp-content\/uploads\/2022\/03\/hgostand4.webp\" alt=\"\" class=\"wp-image-293\" srcset=\"https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand4.webp 402w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand4-300x146.webp 300w\" sizes=\"(max-width: 402px) 100vw, 402px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4ed6\u6587\u4ef6\u683c\u5f0f\u5728\u8fd9\u65b9\u9762\u4e5f\u5dee\u4e0d\u591a\u3002\u5982\u679c\u4f60\u60f3\u4e0b\u8f7d\u7406\u8bba\u4e0a\u6700\u5bbd\u7684 png\uff0c\u53ef\u4ee5\u70b9<a href=\"https:\/\/blog.darrien.dev\/you-dont-know-gif\/loooong-boye.png\" target=\"_blank\" rel=\"noreferrer noopener\">\u8fd9\u91cc<\/a>\u3002\u8fd9\u4e2a\u6587\u4ef6\u5f88\u5c0f\uff0c\u4f46\u6253\u5f00\u5b83\u7684\u65f6\u5019\u4f60\u7684\u56fe\u50cf\u6d4f\u89c8\u5668\u53ef\u80fd\u4f1a\u5d29\u6e83\u3002Firefox \u6d4f\u89c8\u5668\u5f88\u96be\u6253\u5f00\u5b83\uff0c\u5e76\u62a5\u544a\u4e86\u4e00\u4e2a\u9519\u8bef\uff0c\u5c3d\u7ba1\u5b83\u662f\u7b26\u5408\u89c4\u8303\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"808\" height=\"46\" src=\"https:\/\/www.hgostand.com\/wp-content\/uploads\/2022\/03\/hgostand5.webp\" alt=\"\" class=\"wp-image-294\" srcset=\"https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand5.webp 808w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand5-300x17.webp 300w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand5-768x44.webp 768w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand5-535x30.webp 535w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand5-500x28.webp 500w\" sizes=\"(max-width: 808px) 100vw, 808px\" \/><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u56de\u5230\u903b\u8f91\u5c4f\u5e55\u63cf\u8ff0\u7b26\u4e0a<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u8fc7\u903b\u8f91\u5c4f\u5e55\u63cf\u8ff0\u7b26\u8fd8\u6ca1\u8bf4\u5b8c\uff0c\u63a5\u4e0b\u6765\u662f\u4e00\u7ec4\u6253\u5305\u7684\u5b57\u6bb5\u3002\u7528\u89c4\u8303\u4e2d\u7684\u56fe\u8868\u89e3\u91ca\u6bd4\u8f83\u5bb9\u6613\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>     &lt;Packed Fields&gt;  =      Global Color Table Flag       1 Bit<\/code><code>                             Color Resolution              3 Bits<\/code><code>                             Sort Flag                     1 Bit<\/code><code>                             Size of Global Color Table    3 Bits<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u6709\u5173\u4e8e\u5168\u5c40\u989c\u8272\u8868\uff08Global Color Table\uff09\u7684\u4fe1\u606f\uff0c\u5982\u679c\u8bbe\u7f6e\u4e86\u5168\u5c40\u989c\u8272\u8868\u4f4d\uff0c\u5b83\u5c06\u51fa\u73b0\u5728\u903b\u8f91\u5c4f\u5e55\u63cf\u8ff0\u7b26\u4e4b\u540e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u989c\u8272\u5206\u8fa8\u7387\uff08Color Resolution\uff09\u51b3\u5b9a\u4e86\u5168\u5c40\u989c\u8272\u8868\u4e2d\u6bcf\u79cd\u989c\u8272\u6709\u591a\u5c11\u4e2a\u5b57\u8282\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6392\u5e8f\u6807\u5fd7\uff08Sort Flag\uff09\u4f1a\u544a\u8bc9\u89e3\u7801\u5668\u6392\u5728\u524d\u9762\u7684\u989c\u8272\u66f4\u91cd\u8981\uff0c\u5b83\u4f1a\u4ee5\u6709\u7528\u7684\u7a0b\u5ea6\u4ece\u9ad8\u5230\u4f4e\u6392\u5e8f\u989c\u8272\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u5168\u5c40\u989c\u8272\u8868\u7684\u5927\u5c0f\u662f\u8bf4\uff0c\u989c\u8272\u8868\u6709\u591a\u5927\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6211\u4eec\u5411\u65e5\u8475\u56fe\u7247\u7684 0xA \u5b57\u8282\u4e2d\uff0c\u6211\u4eec\u6709 0xF7 \u7684\u7ed3\u679c<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? xxd Sunflower_as_gif_websafe_89a.gif | head -1<\/code><code>00000000: 4749 4638 3961 dc00 0501 -&gt; f7 &lt;- 00 0002 0102  gif89a..........<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6216\u8005\u5728\u4e8c\u8fdb\u5236\u4e2d\u5c31\u662f\uff1a1111 0111<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u610f\u5473\u7740\u6211\u4eec\u7684 gif \u57fa\u672c\u6ee1\u8f7d\uff0c\u9664\u4e86 GCT \u6ca1\u6709\u6392\u5e8f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>                             \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500GCT not sorted<\/code><code>                             \u25bc          by importance<\/code><code>                        1111 0111<\/code><code>                        \u25b2\u2500\u2500\u2500  \u2500\u2500\u2500<\/code><code>      GCT set\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u25b2    \u25b2<\/code><code>                          \u2502    \u2502<\/code><code>    3 bytes per           \u2502    \u2514\u2500\u2500\u2500\u2500\u2500GCT is 768 bytes<\/code><code>    color    \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518          (max size)<\/code><code>(max resolution)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5168\u5c40\u989c\u8272\u8868\u4fdd\u5b58\u4e86\u6bcf\u4e2a\u5b57\u8282\u90e8\u5206\u6240\u4f7f\u7528\u7684\u989c\u8272\u3002\u5b83\u4eec\u662f 0-255 \u7684\u6807\u51c6 RGB \u503c\uff0c\u4f60\u53ef\u4ee5\u5728\u4efb\u4f55\u73b0\u4ee3 RGB \u53d6\u8272\u5668\u91cc\u4f7f\u7528\u8fd9\u4e9b\u6570\u503c\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u7b49\u4e00\u4e0b\uff0c\u90a3\u4e2a\u5168\u5c40\u989c\u8272\u8868\u662f\u53ef\u9009\u7684\u5417\uff1f<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f60\u53ef\u80fd\u5df2\u7ecf\u6ce8\u610f\u5230 0xA \u5b57\u8282\u7684\u7b2c\u4e00\u4f4d\u8bf4 GCT \u53ef\u4ee5\u662f\u53ef\u9009\u7684\u3002\u8fd9\u7684\u786e\u5f88\u6709\u8da3\u3002\u6211\u4eec\u5982\u4f55\u5728\u6ca1\u6709\u6307\u5b9a\u5b83\u9700\u8981\u4ec0\u4e48\u989c\u8272\u7684\u60c5\u51b5\u4e0b\u6e32\u67d3\u56fe\u50cf\u5462\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6839\u636e\u4e0b\u9762\u7684\u89c4\u8303\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u989c\u8272\u8868\u2014\u2014\u5168\u5c40\u989c\u8272\u8868\u548c\u5c40\u90e8\u989c\u8272\u8868\u90fd\u662f\u53ef\u9009\u7684\uff1b\u5982\u679c\u5b58\u5728\u5168\u5c40\u989c\u8272\u8868\uff0c\u5b83\u5c06\u7528\u4e8e\u6570\u636e\u6d41\u4e2d\u6ca1\u6709\u7ed9\u51fa\u5c40\u90e8\u989c\u8272\u8868\u7684\u6240\u6709\u56fe\u50cf\uff1b\u5982\u679c\u5b58\u5728\u5c40\u90e8\u989c\u8272\u8868\uff0c\u5b83\u5c06\u8986\u76d6\u5168\u5c40\u989c\u8272\u8868\u3002\u7136\u800c\uff0c\u5982\u679c\u4e24\u4e2a\u989c\u8272\u8868\u90fd\u4e0d\u5b58\u5728\uff0c\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u81ea\u7531\u5730\u4f7f\u7528\u4e00\u4e2a\u4efb\u610f\u7684\u989c\u8272\u8868\u3002<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6211\u4eec\u62ff\u8d70\u4e00\u5f20\u56fe\u50cf\u7684\u5168\u5c40\u989c\u8272\u8868\uff0c\u73b0\u4ee3\u6e32\u67d3\u5668\u4f1a\u5bf9\u6211\u4eec\u7684\u56fe\u50cf\u505a\u4ec0\u4e48\u5462\uff1f\u6211\u6562\u80af\u5b9a\u4f1a\u6709\u4e00\u4e9b\u60ca\u4eba\u7684\u4e8b\u60c5\u53d1\u751f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u7684\u56fe\u50cf\u6307\u5b9a\u7684\u989c\u8272\u8868\u5927\u5c0f\u4e3a 768 \u5b57\u8282\u3002\u5b83\u4ece 0xA \u5b57\u8282\u5f00\u59cb&#8230;&#8230;\u5047\u8bbe\u6211\u4eec\u50cf\u8fd9\u6837\u628a 0xA \u5b57\u8282\u7684\u6700\u6709\u610f\u4e49\u7684\u6bd4\u7279\u6e05\u96f6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u540e\u5220\u9664\u5230\u7b2c 789 \u5b57\u8282\uff08\u72ec\u5360\uff09\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? xxd Sunflower_as_gif_89a-no-gct.gif | head -1<\/code><code>00000000: 4749 4638 3961 dc00 0501 007f 8121 f904  gif89a.......!..<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u5728\u7b2c\u4e00\u884c\u662f\u4e0a\u9762\u8fd9\u6837\u7ed3\u675f\u7684\uff0c\u8fd9\u4ecd\u7136\u662f\u4e00\u4e2a\u5b8c\u5168\u6709\u6548\u7684 gif\uff0c\u957f\u6210\u8fd9\u6837\u5b50\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"220\" height=\"261\" src=\"https:\/\/www.hgostand.com\/wp-content\/uploads\/2022\/03\/hgostand6.gif\" alt=\"\" class=\"wp-image-295\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b80\u76f4\u4e86\uff01\u5728\u5199\u8fd9\u7bc7\u6587\u7ae0\u7684\u65f6\u5019\uff0c\u5b83\u5c31\u53ea\u663e\u793a\u4e00\u4e2a\u5b8c\u7f8e\u7684\u9ed1\u8272\u65b9\u5757\u3002\u5728\u6211\u8bd5\u8fc7\u7684\u6bcf\u4e00\u4e2a\u6e32\u67d3\u5668\u4e2d\u90fd\u662f\u8fd9\u6837\u7684\u60c5\u51b5\u3002Gimp\u3001Chrome\u3001Firefox\u3001Preview\u3001gifiddle\uff0c\u968f\u4fbf\u54ea\u4e2a\u90fd\u4e00\u6837\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u603b\u4e4b\u56de\u5230\u903b\u8f91\u5c4f\u5e55\u63cf\u8ff0\u7b26\u4e0a\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u7ee7\u7eed\u8c08\u903b\u8f91\u5c4f\u5e55\u63cf\u8ff0\u7b26<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u63cf\u8ff0\u5168\u5c40\u989c\u8272\u8868\u7684\u5b57\u8282\u4e4b\u540e\uff0c\u6709\u4e24\u4e2a\u63cf\u8ff0\u5c4f\u5e55\u63cf\u8ff0\u7b26\u7684\u672b\u7aef\u5b57\u8282\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b57\u8282 B \u662f\u80cc\u666f\u989c\u8272\uff0c\u6307\u7684\u662f\u5168\u5c40\u989c\u8272\u8868\u7684\u7d22\u5f15\uff1b\u5b57\u8282 C \u662f\u50cf\u7d20\u957f\u5bbd\u6bd4\uff0c\u63cf\u8ff0\u4e86\u50cf\u7d20\u7684\u65b9\u6b63\u5ea6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? xxd Sunflower_as_gif_websafe_89a.gif | head -1<\/code><code>00000000: 4749 4638 3961 dc00 0501 f700 0002 0102  gif89a..........<\/code><code>                                     ^  ^<\/code><code>                                     |  |<\/code><code>Background color is color in index 0 of |<\/code><code>GCT                                     |<\/code><code>                                        Pixel aspect ratio is 0:0 or host<\/code><code>                                        pixel aspect ratio.<\/code><code><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u7b49\u4e00\u4e0b\uff0c\u50cf\u7d20\u957f\u5bbd\u6bd4\u662f\u4ec0\u4e48\uff1f<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u50cf\u7d20\u5e76\u4e0d\u603b\u662f\u6b63\u65b9\u5f62\u7684\uff01\u5b57\u8282\u4e5f\u4e0d\u603b\u662f 8 \u4f4d\uff0c\u4f46\u8fd9\u4e00\u70b9\u5c31\u4e0d\u591a\u8bf4\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">gif \u548c\u5176\u4ed6\u4e00\u4e9b\u6700\u6d41\u884c\u7684\u73b0\u4ee3\u56fe\u50cf\u683c\u5f0f\u90fd\u652f\u6301\u975e\u6b63\u65b9\u5f62\u50cf\u7d20\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u60f3\u77e5\u9053\u6700\u6d41\u884c\u7684 gif \u6e32\u67d3\u5668\u5728\u6e32\u67d3\u975e\u65b9\u5f62\u50cf\u7d20\u65f6\u517c\u5bb9\u6027\u5982\u4f55\u3002\u6211\u4eec\u5728 Firefox \u548c Chrome \u4e2d\u505a\u4e00\u4e2a\u6d41\u884c\u7684\u6d4b\u8bd5\uff0c\u770b\u770b\u5b83\u4eec\u770b\u8d77\u6765\u5982\u4f55\uff1a<a href=\"http:\/\/frs.badcoffee.info\/PAR_AcidTest\/\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/frs.badcoffee.info\/PAR_AcidTest\/<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"525\" src=\"https:\/\/www.hgostand.com\/wp-content\/uploads\/2022\/03\/hgostand7-1024x525.webp\" alt=\"\" class=\"wp-image-296\" srcset=\"https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand7-1024x525.webp 1024w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand7-300x154.webp 300w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand7-768x394.webp 768w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand7-535x275.webp 535w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand7-1536x788.webp 1536w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand7-900x462.webp 900w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand7-500x257.webp 500w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand7.webp 1598w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u4f9d\u6b21\u662f\uff1ajpg\u3001png \u548c gif\u3002\u800c Firefox\u3001Chrome \u548c Preview \u90fd\u5ffd\u7565\u4e86\u957f\u5bbd\u6bd4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u5e78\u7684\u662f\uff0c\u8fd9\u4e00\u7279\u6027\u666e\u904d\u4e0d\u88ab\u652f\u6301\uff0c\u800c\u4e14\u76ee\u524d\u5728 Firefox \u4e2d\u6709\u4e00\u4e2a 16 \u5e74\u7684\u8001 bug\uff1a<a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=333377\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=333377<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u751a\u81f3 gifiddle \u8fd9\u4e2a\u6211\u80fd\u627e\u5230\u7684\u517c\u5bb9\u6027\u6700\u597d\u7684 gif \u6d4f\u89c8\u5668\u4e5f\u4e0d\u652f\u6301\u975e\u65b9\u5f62\u50cf\u7d20\uff1a<a href=\"https:\/\/github.com\/ata4\/gifiddle\/issues\/1\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/github.com\/ata4\/gifiddle\/issues\/1<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f60\u771f\u7684\u60f3\u663e\u793a\u975e\u65b9\u5f62\u50cf\u7d20\uff0c\u53ef\u4ee5\u7528\u8c03\u6574\u8fc7\u7684<a href=\"https:\/\/retrocomputing.stackexchange.com\/a\/7078\" target=\"_blank\" rel=\"noreferrer noopener\">gimp<\/a>\u6765\u505a\u3002\u6b64\u5916\uff0cgrafx2 \u663e\u7136\u53ef\u4ee5<a href=\"https:\/\/retrocomputing.stackexchange.com\/a\/7081\" target=\"_blank\" rel=\"noreferrer noopener\">\u5904\u7406<\/a>\u975e\u5e38\u7279\u5b9a\u7684\u5947\u602a\u50cf\u7d20\u5206\u8fa8\u7387\u3002\u4e0d\u8fc7\u6211\u8fd8\u6ca1\u6709\u4eb2\u81ea\u6d4b\u8bd5\u8fc7\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u56de\u5230\u5168\u5c40\u989c\u8272\u8868<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u5168\u5c40\u989c\u8272\u8868\uff08GCT\uff09\u663e\u7136\u662f gif \u6700\u65e0\u804a\u7684\u90e8\u5206\u3002\u8fd9\u91cc\u771f\u7684\u6ca1\u6709\u4ec0\u4e48\u503c\u5f97\u8c08\u8bba\u7684\u4e1c\u897f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u7684 awful-gif \u9879\u76ee\u53ef\u4ee5\u8f93\u51fa\u5411\u65e5\u8475\u7684 GCT \u4e2d\u7684\u6240\u6709\u989c\u8272\uff08\u4e5f\u8bb8\u5176\u4ed6\u56fe\u50cf\u4e5f\u884c\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">GCT \u7684\u89e3\u6790\u5c31\u5728<a href=\"https:\/\/gitlab.com\/DarrienG\/awful-gif\/-\/blob\/main\/src\/gif_decoder\/gct_parser.rs\" target=\"_blank\" rel=\"noreferrer noopener\">\u8fd9\u91cc<\/a>\uff0c\u4f60\u53ef\u4ee5\u770b\u5230\u5b83\u771f\u7684\u6ca1\u6709\u4ec0\u4e48\u7279\u522b\u7684\u5730\u65b9\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7528\u4e0b\u9762\u7684\u547d\u4ee4\u8fd0\u884c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>cargo run --quiet -- --gif-file .\/experiments\/Sunflower_as_gif_websafe.gif<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u53ef\u9009\u7684\u56fe\u5f62\u63a7\u5236\u6269\u5c55<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u6211\u4eec\u8bb2\u56fe\u5f62\u63a7\u5236\u6269\u5c55\uff08GCE\uff09\uff0c\u7531\u6269\u5c55\u5f15\u5165\u5668 0x21 \u5f15\u5165\uff08extension introduced\uff09\uff0c\u7136\u540e\u662f 0xF9\uff08\uff01\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u7528\u7684\u6269\u5c55\u6709\u8bb8\u591a\uff0c\u4f46\u56fe\u5f62\u63a7\u5236\u6269\u5c55\u53ef\u4ee5\u8bf4\u662f\u6700\u91cd\u8981\u7684\u6269\u5c55\u4e4b\u4e00\uff0c\u81f3\u5c11\u5728\u73b0\u4ee3\u7528\u4f8b\u4e2d\u662f\u8fd9\u6837\u3002GCE \u5141\u8bb8\u5404\u5e27\u4e4b\u95f4\u5b58\u5728\u663e\u793a\u5ef6\u8fdf\uff0c\u8fd9\u6837 gif \u624d\u80fd\u6210\u4e3a\u201c\u52a8\u753b\u201c\u3002GCE \u8fd8\u5141\u8bb8\u5176\u4ed6\u4e00\u4e9b\u4e8b\u9879\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? xxd Sunflower_as_gif_websafe_89a.gif | head -50 | tail -2<\/code><code>00000300: 88ae b091 a5b1 a4b9 be94 887f 81 -&gt; 21 f904  .............!..<\/code><code>00000310: 0000 0000 &lt;- 0021 fe51 4669 6c65 2073 6f75  .....!.QFile sou<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a gif \u5e76\u4e0d\u662f\u52a8\u753b\uff0c\u6240\u4ee5\u8fd9\u91cc\u5e76\u6ca1\u6709\u53d1\u751f\u5f88\u591a\u4e8b\u60c5\u3002\u6b63\u5982\u4f60\u6240\u770b\u5230\u7684\uff0c\u4e0a\u9762\u6709\u5f88\u591a\u96f6\uff0c\u4f46\u6211\u4eec\u8fd8\u662f\u4e00\u4e2a\u5b57\u8282\u4e00\u4e2a\u5b57\u8282\u6765\u8bb2\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e00\u4e2a\u5b57\u8282\u662f\u5757\u5927\u5c0f\uff0c\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\u662f 0x04\uff0c\u4f46\u5b9e\u9645\u4e0a\u6839\u636e\u89c4\u8303\u5b83\u603b\u662f 0x04\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u7b49\u4e00\u4e0b\uff0c\u6211\u4eec\u80fd\u4e0d\u80fd\u628a\u5757\u5927\u5c0f\u53bb\u6389\uff1f<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5757\u5927\u5c0f\u603b\u662f\u4e00\u4e2a\u9759\u6001\u7684\u5e38\u6570\uff0c\u90a3\u4e48\u5b83\u5c31\u4e0d\u592a\u91cd\u8981\u4e86\u662f\u5417\uff1f\u4ece\u6280\u672f\u4e0a\u8bb2\uff0c\u5b83\u662f\u89c4\u8303\u7684\u4e00\u90e8\u5206\uff0c\u4f46\u5b9e\u9645\u4e0a\u5e76\u6ca1\u6709\u4ec0\u4e48\u4f5c\u7528\u3002\u6211\u4eec\u518d\u5728\u6d41\u884c\u7684\u56fe\u50cf\u6d4f\u89c8\u5668\u4e2d\u6253\u5f00\u5b83\u770b\u770b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fd9\u4e9b\u6d4b\u8bd5\u4e2d\u6211\u5c06\u4f7f\u7528\u4e00\u4e2a\u66f4\u7b80\u5355\u7684 gif\uff0c\u8fd9\u6837\u66f4\u5bb9\u6613\u770b\u5230\u53d1\u751f\u4e86\u4ec0\u4e48\u60c5\u51b5\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/static001.geekbang.org\/infoq\/64\/64b75f87872eb323b4b0eddc10ae9c97.gif\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e0b\u9762\u7684\u6d4b\u8bd5\u4e2d\u6211\u5bf9\u5b83\u505a\u4e86\u4fee\u6539\uff0c\u5220\u9664\u4e86 GCE\u3002\u4fee\u6539\u540e\u7684\u7248\u672c\u4ee5 xxd \u683c\u5f0f\u4fdd\u5b58\u5728\u4e0b\u9762\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>00000000: 4749 4638 3961 2000 3400 f0ff 00ff ffff  gif89a .4.......<\/code><code>00000010: 0000 0021 f903 0500 0002 002c 0000 0000  ...!.......,....<\/code><code>00000020: 2000 3400 0002 788c 8fa9 cb0b 0fa3 94ed   .4...x.........<\/code><code>00000030: cc7b abc1 1cea d075 5fc8 8d64 a69d 68a5  .{.....u_..d..h.<\/code><code>00000040: 4e66 eba5 702c 3675 cddc a5bd e34e bfcb  Nf..p,6u.....N..<\/code><code>00000050: 0131 ace1 ea47 0405 9128 9f42 9714 2667  .1...G...(.B..&amp;g<\/code><code>00000060: a70d 3564 bd1a b52e 25b7 f905 8729 de31  ..5d....%....).1<\/code><code>00000070: cd1c c9a2 016a 74db fc1e c7c3 f36f 9d7b  .....jt......o.{<\/code><code>00000080: d7e6 af7b 6a7f f607 13d8 32a8 5258 55e6  ...{j.....2.RXU.<\/code><code>00000090: 9608 b728 d748 f768 1789 f751 b950 0000  ...(.H.h...Q.P..<\/code><code>000000a0: 3b                                       ;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c06\u5176\u4fdd\u5b58\u5230\u4e00\u4e2a\u540d\u4e3a invalid.hex \u7684\u6587\u672c\u6587\u4ef6\u4e2d\uff0c\u7136\u540e\u6267\u884c\uff1axxd -r invalid.hex &gt; invalid.gif<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(\u66f4\u65b0\u7684\u5b57\u8282\u5728\uff1a0x16\uff0c\u4ece 0x4-&gt;0x03)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e00\u4e2a\u662f macOS Preview\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"274\" height=\"245\" src=\"https:\/\/www.hgostand.com\/wp-content\/uploads\/2022\/03\/hgoatand8.webp\" alt=\"\" class=\"wp-image-297\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Preview \u662f\u7b26\u5408\u6807\u51c6\u7684\uff01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\u6211\u4eec\u8bd5\u8bd5 Firefox\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"816\" height=\"348\" src=\"https:\/\/www.hgostand.com\/wp-content\/uploads\/2022\/03\/hgostand9.webp\" alt=\"\" class=\"wp-image-298\" srcset=\"https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand9.webp 816w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand9-300x128.webp 300w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand9-768x328.webp 768w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand9-535x228.webp 535w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand9-500x213.webp 500w\" sizes=\"(max-width: 816px) 100vw, 816px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Firefox \u77e5\u9053\u8fd9\u662f\u4e00\u4e2a\u9759\u6001\u503c\uff0c\u5e76\u5ffd\u7565\u4e86\u5b83\u7684\u7ed3\u679c\u3002\u8fd9\u5e76\u4e0d\u5b8c\u5168\u7b26\u5408\u6807\u51c6\uff0c\u4f46\u53ef\u80fd\u662f\u6700\u806a\u660e\u7684\u505a\u6cd5\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"625\" height=\"370\" src=\"https:\/\/www.hgostand.com\/wp-content\/uploads\/2022\/03\/hgostand10.webp\" alt=\"\" class=\"wp-image-299\" srcset=\"https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand10.webp 625w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand10-300x178.webp 300w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand10-535x317.webp 535w, https:\/\/wite.oxoooo.com\/wp-content\/uploads\/2022\/03\/hgostand10-500x296.webp 500w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u5757\u5927\u5c0f\u88ab\u79fb\u9664\u540e\uff0cChrome \u4f1a\u6709\u70b9\u6293\u72c2\u3002\u5728\u8fd9\u91cc\uff0cChrome \u80af\u5b9a\u662f\u6700\u4e0d\u7b26\u5408\u6807\u51c6\u7684\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u56de\u5230\u56fe\u5f62\u63a7\u5236\u6269\u5c55<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6211\u4eec\u8bfb\u5b8c\u5757\u5927\u5c0f\u4e4b\u540e\uff0c\u662f\u4e00\u4e2a\u5305\u88c5\u597d\u7684\u5b57\u6bb5\uff0c\u63cf\u8ff0\u5982\u4e0b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>      &lt;Packed Fields&gt;  =     Reserved                      3 Bits<\/code><code>                             Disposal Method               3 Bits<\/code><code>                             User Input Flag               1 Bit<\/code><code>                             Transparent Color Flag        1 Bit<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6211\u4eec\u7684\u56fe\u50cf\u4e2d\u6240\u6709\u8fd9\u4e9b\u5b57\u6bb5\u90fd\u88ab\u8bbe\u7f6e\u4e3a 0\uff0c\u6240\u4ee5\u6211\u53ea\u89e3\u91ca\u5b83\u4eec\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Reserved \u662f\u4e3a gif22a \u51fa\u73b0\u65f6\u8bbe\u7f6e\u7684\uff0c\u6211\u4eec\u9700\u8981\u8fd9\u4e09\u4e2a\u4f4d\u6765\u505a\u4e00\u4e9b\u597d\u4e8b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">User Input \u662f\u4e3a\u4e86\u63a5\u53d7\u7528\u6237\u8f93\u5165\uff0c\u901a\u8fc7\u70b9\u51fb\u9f20\u6807\u6216\u6309\u4e0b\u952e\u76d8\u5c06 gif \u56fe\u7247\u63a8\u8fdb\u5230\u4e0b\u4e00\u5e45\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u900f\u660e\u7d22\u5f15\u662f\u7528\u6765\u8bbe\u7f6e\u6211\u4eec\u662f\u5426\u5e94\u8be5\u5141\u8bb8\u900f\u660e\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u7b49\u4e00\u4e0b\uff0cgif \u53ef\u4ee5\u63a5\u53d7\u7528\u6237\u8f93\u5165\uff1f\uff1f\uff1f<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u662f\u7684\uff0c\u4f60\u6ca1\u770b\u9519\u3002gif \u53ef\u4ee5\u63a5\u53d7\u7528\u6237\u7684\u8f93\u5165\u6765\u63a8\u8fdb\u5230\u4e0b\u4e00\u5e27\u3002\u8fd9\u4e2a\u53ef\u601c\u7684<a href=\"https:\/\/www.igif.io\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u5bb6\u4f19<\/a>\u4e3a\u4e86\u7528 png \u91cd\u73b0\u8fd9\u4e00\u7279\u6027\u5efa\u7acb\u4e86\u4e00\u4e2a\u7f51\u7ad9\u3002\u771f\u53ef\u60dc\uff0c\u4ed6\u50cf\u6211\u4e00\u6837\u88ab\u56f0\u5728\u8fd9\u91cc\u4e86\uff0c\u5c31\u56e0\u4e3a\u4ed6\u6ca1\u770b\u8fc7 gif \u89c4\u8303\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u4e0d\u59a8\u8ba8\u8bba gif \u652f\u6301\u7684\u53e6\u4e00\u4e2a\u5947\u602a\u7279\u6027\uff0c\u5373\u7eaf\u6587\u672c\u6269\u5c55\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7eaf\u6587\u672c\u6269\u5c55\u5141\u8bb8 gif \u5236\u4f5c\u8005\u5728\u4ed6\u4eec\u559c\u6b22\u7684\u4efb\u4f55\u5730\u65b9\u5d4c\u5165\u5355\u8272\u6587\u672c\uff0c\u5e76\u76f4\u63a5\u5728\u56fe\u50cf\u4e0a\u8fdb\u884c\u4e00\u4e9b\u57fa\u672c\u7684\u6837\u5f0f\u8bbe\u8ba1\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7eaf\u6587\u672c\u6269\u5c55\u548c\u7528\u6237\u8f93\u5165\u6269\u5c55\u4e00\u6837\uff0c\u9664\u4e86\u50cf gifiddle \u7684\u8fd9\u6837\u4e3a\u4e86\u597d\u73a9\u800c\u5236\u4f5c\u7684 gif \u67e5\u770b\u5668\u5916\uff0c\u53ef\u80fd\u4ece\u672a\u88ab\u4efb\u4f55 gif \u67e5\u770b\u5668\u5b9e\u73b0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">BOB_89A.gif \u53ef\u80fd\u662f\u6709\u53f2\u4ee5\u6765\u5728\u4e92\u8054\u7f51\u4e0a\u53d1\u5e03\u7684\u7b2c\u4e00\u4e2a gif\uff0c\u662f\u4e00\u4e2a\u540c\u65f6\u4f7f\u7528\u8fd9\u4e24\u79cd\u65b9\u5f0f\u7684 gif \u4f8b\u5b50\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662f BOB_89A.gif \u5728\u73b0\u4ee3\u6d4f\u89c8\u5668\u4e2d\u7684\u6e32\u67d3\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"320\" height=\"200\" src=\"https:\/\/www.hgostand.com\/wp-content\/uploads\/2022\/03\/hgostand11.gif\" alt=\"\" class=\"wp-image-300\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u800c\uff0c\u5982\u679c\u4f60\u628a\u5b83\u653e\u5230 gifiddle \u4e2d\uff0c\u4f1a\u5f97\u5230\u4e00\u4e2a\u975e\u5e38\u4e0d\u540c\u7684\u7ed3\u679c\uff0c\u6700\u540e\u7684\u4fe1\u606f\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u4e8b\u5b9e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u8fc7\u6211\u4e0d\u4f1a\u5267\u900f\u8fd9\u4e2a\u60ca\u559c\u3002\u4f60\u53ef\u4ee5\u4e0b\u8f7d\u8fd9\u4e2a gif \u653e\u5230 gifiddle \u91cc\uff0c\u770b\u770b\u4f1a\u53d1\u751f\u4ec0\u4e48\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">gifiddle \u94fe\u63a5\uff1a<a href=\"http:\/\/ata4.github.io\/gifiddle\/\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/ata4.github.io\/gifiddle\/<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4efb\u4f55\u73b0\u4ee3\u6d4f\u89c8\u5668\u6216 gif \u6d4f\u89c8\u5668\u90fd\u4e0d\u652f\u6301\u8fd9\u4e24\u9879\u7279\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f60\u60f3\u9605\u8bfb\u66f4\u591a\u5173\u4e8e\u7eaf\u6587\u672c\u6269\u5c55\u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u770b<a href=\"https:\/\/entropymine.wordpress.com\/2018\/06\/23\/gif-plain-text-extensions\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u8fd9\u91cc<\/a>\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u53ef\u9009\u7684\u6ce8\u91ca\u6269\u5c55<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\u662f\u6ce8\u91ca\u6269\u5c55\uff0c\u5b9e\u9645\u4e0a\u5b83\u53ef\u4ee5\u51fa\u73b0\u5728\u4e00\u4e2a\u5757\u53ef\u80fd\u5f00\u59cb\u7684\u4efb\u4f55\u5730\u65b9\u3002\u7136\u800c\u5b83\u6700\u5e38\u51fa\u73b0\u5728 gif \u7684\u8fd9\u4e00\u90e8\u5206\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u91ca\u90e8\u5206\u53ea\u5141\u8bb8\u5305\u542b 7 \u4f4d\u7684 ascii\uff0c\u5e76\u4e14\u662f\u4f9b\u4eba\u7c7b\u9605\u8bfb\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7531\u4e8e\u6ce8\u91ca\u90e8\u5206\u53ea\u662f ascii\uff0c\u4f60\u53ef\u4ee5\u76f4\u63a5\u53d1\u5c04\u5b57\u7b26\u4e32\u5e76\u5728\u8f93\u51fa\u4e2d\u627e\u5230\u6ce8\u91ca\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? strings Sunflower_as_gif_websafe_89a.gif | head -7 | tail -1<\/code><code>QFile source: https:\/\/commons.wikimedia.org\/wiki\/File:Sunflower_as_gif_websafe.gif<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u7801<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fd9\u5f20\u56fe\u7247\u4e2d\uff0c\u5b83\u5f00\u59cb\u4e8e\u56fe\u7247\u7684 0x310 \u5b57\u8282\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>? xxd Sunflower_as_gif_websafe_89a.gif | head -55 | tail -6<\/code><code>00000310: 0000 0000 0021 fe51 4669 6c65 2073 6f75  .....!.QFile sou<\/code><code>00000320: 7263 653a 2068 7474 7073 3a2f 2f63 6f6d  rce: https:\/\/com<\/code><code>00000330: 6d6f 6e73 2e77 696b 696d 6564 6961 2e6f  mons.wikimedia.o<\/code><code>00000340: 7267 2f77 696b 692f 4669 6c65 3a53 756e  rg\/wiki\/File:Sun<\/code><code>00000350: 666c 6f77 6572 5f61 735f 6769 665f 7765  flower_as_gif_we<\/code><code>00000360: 6273 6166 652e 6769 6600 2c00 0000 00dc  bsafe.gif.,.....<\/code><\/pre>\n\n\n\n<p 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