{"id":207302,"date":"2025-07-08T11:08:09","date_gmt":"2025-07-08T03:08:09","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207302\/"},"modified":"2025-07-08T11:08:09","modified_gmt":"2025-07-08T03:08:09","slug":"%e4%bd%bf%e7%94%a8-go-%e5%9b%be%e5%83%8f%e5%ba%93%e4%bb%8e%e6%a0%87%e5%87%86%e8%be%93%e5%87%ba%e8%a7%a3%e7%a0%81-bmp-%e5%9b%be%e5%83%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207302\/","title":{"rendered":"\u4f7f\u7528 go \u56fe\u50cf\u5e93\u4ece\u6807\u51c6\u8f93\u51fa\u89e3\u7801 bmp \u56fe\u50cf"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u4f7f\u7528 go \u56fe\u50cf\u5e93\u4ece\u6807\u51c6\u8f93\u51fa\u89e3\u7801 bmp \u56fe\u50cf<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-21 16:09:33<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u5c0f\u4f19\u4f34\u4eec\u6709\u6ca1\u6709\u89c9\u5f97\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u5f88\u6709\u610f\u601d\uff1f\u6709\u610f\u601d\u5c31\u5bf9\u4e86\uff01\u4eca\u5929\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u4f7f\u7528 go \u56fe\u50cf\u5e93\u4ece\u6807\u51c6\u8f93\u51fa\u89e3\u7801 bmp \u56fe\u50cf\u300b<\/span>\uff0c\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u82e5\u662f\u5728\u5b66\u4e60\u4e2d\u5bf9\u5176\u4e2d\u90e8\u5206\u77e5\u8bc6\u70b9\u6709\u7591\u95ee\uff0c\u6216\u8bb8\u770b\u4e86\u672c\u6587\u5c31\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u6b63\u5728\u5c1d\u8bd5\u4f7f\u7528 image \u548c golang.org\/x\/image\/bmp \u5e93\u89e3\u7801 bmp \u56fe\u50cf\u3002\u56fe\u50cf\u7531 ffmpeg \u8f93\u51fa\u5230 stdout\u3002\u8fd9\u662f\u83b7\u53d6\u6846\u67b6\u7684\u4ee3\u7801\uff1a<\/p>\n<pre>cmd := exec.command(\"ffmpeg\", \"-accurate_seek\", \"-ss\", strconv.itoa(index), \"-i\",\n    filename, \"-frames:v\", \"1\", \"-hide_banner\", \"-loglevel\", \"0\", \"pipe:.bmp\")\nvar out bytes.buffer\ncmd.stdout = &amp;out\nerr := cmd.run()\nif err != nil {\n    log.fatal(err)\n}\n\no := bufio.newreader(&amp;out)<\/pre>\n<p>\u7136\u540e\u6211\u4f7f\u7528 <code>img, _, err := image.decode(o)<\/code> \u5bf9\u5176\u8fdb\u884c\u89e3\u7801 \u7136\u800c\uff0c\u8fd9\u7ed9\u51fa\u4e86\u201c\u56fe\u50cf\uff1a\u672a\u77e5\u683c\u5f0f\u201d\u7684\u9519\u8bef\u3002\u6211\u5df2\u7ecf\u5728 main \u65b9\u6cd5\u4e2d\u6ce8\u518c\u4e86 bmp \u683c\u5f0f\uff0c\u5e76\u4e14\u6211\u4e4b\u524d\u5df2\u7ecf\u6210\u529f\u5730\u4ece\u78c1\u76d8\u89e3\u7801\u4e86\u5b9e\u9645\u7684 bmp \u6587\u4ef6\uff0c\u53ea\u662f\u4e0d\u662f\u4ece stdout \u89e3\u7801\u3002<\/p>\n<p>\u6211\u5c1d\u8bd5\u4ec5\u4f7f\u7528 bmp.decode \u800c\u4e0d\u662f image.decode\uff0c\u4f46\u8fd9\u53ea\u4f1a\u7ed9\u51fa\u9519\u8bef\u201ceof\u201d\u3002<\/p>\n<p>\u6211\u60f3\u4e5f\u8bb8\u6211\u6ca1\u6709\u4ee5\u6b63\u786e\u7684\u65b9\u5f0f\u83b7\u53d6\u6807\u51c6\u8f93\u51fa\uff0c\u4f46\u5982\u679c\u6211\u76f4\u63a5\u5c06\u5176\u5199\u5165\u6587\u4ef6\uff1a<\/p>\n<pre>o := bufio.NewReader(&amp;out)\n\noutputfile, err := os.Create(\"test.bmp\")\nif err != nil {\n    log.Fatal(err)\n}\ndefer outputfile.Close()\nio.Copy(outputfile, o)<\/pre>\n<p>\u7136\u540e\u5b83\u5de5\u4f5c\u6b63\u5e38\uff0c\u6211\u53ef\u4ee5\u6253\u5f00\u5b83\u3002<\/p>\n<p>\u7f16\u8f91\uff1a\u4ee3\u7801<\/p>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p><strong>\u66f4\u65b0\uff1a<\/strong>\u4e8b\u5b9e\u8bc1\u660e\uff0c\u95ee\u9898\u662f <code>-ss<\/code> \u9700\u8981\u65f6\u95f4\u800c\u4e0d\u662f\u5e27\u7d22\u5f15\u3002<\/p>\n<p>\u6211\u5c1d\u8bd5\u91cd\u73b0\u8be5\u95ee\u9898\uff0c\u4f46\u5b83\u4f3c\u4e4e\u5bf9\u6211\u6709\u7528\u3002\u4e5f\u8bb8\u6dfb\u52a0 <code>cmd.stderr = os.stderr<\/code> \u4ee5\u67e5\u770b ffmpeg \u8f93\u51fa\u662f\u5426\u7ed9\u51fa\u7ebf\u7d22\u3002\u60a8\u8fd8\u53ef\u4ee5\u53d1\u5e03\u4e00\u4e2a\u5b8c\u5168\u53ef\u8fd0\u884c\u7684\u793a\u4f8b\u5417\uff1f<\/p>\n<pre>package main\n\nimport (\n    \"bytes\"\n    \"image\"\n    \"log\"\n    \"os\"\n    \"os\/exec\"\n\n    _ \"golang.org\/x\/image\/bmp\"\n)\n\nfunc main() {\n    cmd := exec.Command(\n        \"docker\", \"run\",\n        \"--rm\",\n        \"mwader\/static-ffmpeg\",\n        \"-ss\", \"5\",\n        \"-f\", \"lavfi\",\n        \"-i\", \"testsrc\",\n        \"-frames:v\", \"1\",\n        \"-f\", \"image2\",\n        \"-vcodec\", \"bmp\",\n        \"pipe:1\",\n    )\n    var out bytes.Buffer\n    cmd.Stderr = os.Stderr\n    cmd.Stdout = &amp;out\n    err := cmd.Run()\n    if err != nil {\n        log.Fatal(err)\n    }\n\n    img, imgFormat, imgErr := image.Decode(&amp;out)\n\n    log.Printf(\"img.Bounds(): %#+v\\n\", img.Bounds())\n    log.Printf(\"imgFormat: %#+v\\n\", imgFormat)\n    log.Printf(\"imgErr: %#+v\\n\", imgErr)\n}<\/pre>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u4f7f\u7528 go \u56fe\u50cf\u5e93\u4ece\u6807\u51c6\u8f93\u51fa\u89e3\u7801 bmp \u56fe\u50cf\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207302","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207302","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207302"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207302\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207302"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207302"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207302"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}