{"id":123468,"date":"2024-03-24T11:25:29","date_gmt":"2024-03-24T02:25:29","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/go%e3%81%a7ffmpeg%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e9%9f%b3%e5%a3%b0%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%83%e3%83%88%e5%a4%89%e6%8f%9b%e3%81%a8%e5%9c%a7%e7%b8%ae%e3%82%92%e8%a1%8c\/"},"modified":"2024-04-04T07:37:09","modified_gmt":"2024-04-03T22:37:09","slug":"go%e3%81%a7ffmpeg%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e9%9f%b3%e5%a3%b0%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%83%e3%83%88%e5%a4%89%e6%8f%9b%e3%81%a8%e5%9c%a7%e7%b8%ae%e3%82%92%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/go%e3%81%a7ffmpeg%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e9%9f%b3%e5%a3%b0%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%83%e3%83%88%e5%a4%89%e6%8f%9b%e3%81%a8%e5%9c%a7%e7%b8%ae%e3%82%92%e8%a1%8c\/","title":{"rendered":"Go\u3067FFmpeg\u3092\u4f7f\u7528\u3057\u3066\u97f3\u58f0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5909\u63db\u3068\u5727\u7e2e\u3092\u884c\u3046\u65b9\u6cd5"},"content":{"rendered":"<p>FFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u3001Go\u8a00\u8a9e\u3067\u30aa\u30fc\u30c7\u30a3\u30aa\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u5909\u63db\u3084\u5727\u7e2e\u306e\u305f\u3081\u306b\u3088\u304f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002FFmpeg\u306f\u3001\u30aa\u30fc\u30c7\u30a3\u30aa\u3084\u30d3\u30c7\u30aa\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u5f62\u5f0f\u3092\u51e6\u7406\u3067\u304d\u308b\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u30de\u30eb\u30c1\u30e1\u30c7\u30a3\u30a2\u51e6\u7406\u30c4\u30fc\u30eb\u3067\u3059\u3002<\/p>\n<p>\u307e\u305a\u3001Go\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067FFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002ffmpeg\u306e\u6a5f\u80fd\u3092\u547c\u3073\u51fa\u3059\u305f\u3081\u306e\u30b7\u30f3\u30d7\u30eb\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u63d0\u4f9b\u3059\u308bgo-ffmpeg\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002 go-ffmpeg\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>go get github.com\/giorgisio\/goav\/avcodec\r\ngo get github.com\/giorgisio\/goav\/avformat\r\ngo get github.com\/giorgisio\/goav\/avutil\r\n<\/code><\/pre>\n<p>\u305d\u306e\u4e0a\u3067\u3001go-ffmpeg \u30d1\u30c3\u30b1\u30fc\u30b8\u5185\u306e\u95a2\u6570\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u30aa\u30fc\u30c7\u30a3\u30aa\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u5909\u63db\u3068\u5727\u7e2e\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u5165\u529b\u97f3\u58f0\u30d5\u30a1\u30a4\u30eb\u3092\u76ee\u7684\u306e\u5f62\u5f0f\u3078\u3068\u5909\u63db\u3057\u5727\u7e2e\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u305f\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">package<\/span> main\r\n<span class=\"hljs-keyword\">import<\/span> (\r\n<span class=\"hljs-string\">\"github.com\/giorgisio\/goav\/avcodec\"<\/span>\r\n<span class=\"hljs-string\">\"github.com\/giorgisio\/goav\/avformat\"<\/span>\r\n<span class=\"hljs-string\">\"github.com\/giorgisio\/goav\/avutil\"<\/span>\r\n)\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span><\/span> {\r\n<span class=\"hljs-comment\">\/\/ \u6253\u5f00\u8f93\u5165\u97f3\u9891\u6587\u4ef6<\/span>\r\ninputFileName := <span class=\"hljs-string\">\"input.wav\"<\/span>\r\ninputFormatContext := avformat.AvformatAllocContext()\r\n<span class=\"hljs-keyword\">if<\/span> avformat.AvformatOpenInput(&amp;inputFormatContext, inputFileName, <span class=\"hljs-literal\">nil<\/span>, <span class=\"hljs-literal\">nil<\/span>) != <span class=\"hljs-number\">0<\/span> {\r\n<span class=\"hljs-built_in\">panic<\/span>(<span class=\"hljs-string\">\"\u65e0\u6cd5\u6253\u5f00\u8f93\u5165\u97f3\u9891\u6587\u4ef6\"<\/span>)\r\n}\r\n<span class=\"hljs-keyword\">defer<\/span> avformat.AvformatCloseInput(inputFormatContext)\r\n<span class=\"hljs-comment\">\/\/ \u83b7\u53d6\u8f93\u5165\u97f3\u9891\u6d41\u4fe1\u606f<\/span>\r\n<span class=\"hljs-keyword\">if<\/span> avformat.AvformatFindStreamInfo(inputFormatContext, <span class=\"hljs-literal\">nil<\/span>) &lt; <span class=\"hljs-number\">0<\/span> {\r\n<span class=\"hljs-built_in\">panic<\/span>(<span class=\"hljs-string\">\"\u65e0\u6cd5\u83b7\u53d6\u8f93\u5165\u97f3\u9891\u6d41\u4fe1\u606f\"<\/span>)\r\n}\r\n<span class=\"hljs-comment\">\/\/ \u627e\u5230\u97f3\u9891\u89e3\u7801\u5668<\/span>\r\naudioStreamIndex := <span class=\"hljs-number\">-1<\/span>\r\n<span class=\"hljs-keyword\">for<\/span> i := <span class=\"hljs-number\">0<\/span>; i &lt; <span class=\"hljs-type\">int<\/span>(inputFormatContext.NbStreams()); i++ {\r\n<span class=\"hljs-keyword\">if<\/span> inputFormatContext.Streams()[i].CodecParameters().CodecType() == avformat.AVMEDIA_TYPE_AUDIO {\r\naudioStreamIndex = i\r\n<span class=\"hljs-keyword\">break<\/span>\r\n}\r\n}\r\n<span class=\"hljs-keyword\">if<\/span> audioStreamIndex == <span class=\"hljs-number\">-1<\/span> {\r\n<span class=\"hljs-built_in\">panic<\/span>(<span class=\"hljs-string\">\"\u627e\u4e0d\u5230\u97f3\u9891\u6d41\"<\/span>)\r\n}\r\naudioCodecParameters := inputFormatContext.Streams()[audioStreamIndex].CodecParameters()\r\naudioCodec := avcodec.AvcodecFindDecoder(audioCodecParameters.CodecId())\r\n<span class=\"hljs-keyword\">if<\/span> audioCodec == <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-built_in\">panic<\/span>(<span class=\"hljs-string\">\"\u627e\u4e0d\u5230\u97f3\u9891\u89e3\u7801\u5668\"<\/span>)\r\n}\r\n<span class=\"hljs-comment\">\/\/ \u6253\u5f00\u97f3\u9891\u89e3\u7801\u5668<\/span>\r\naudioCodecContext := avcodec.AvcodecAllocContext3(audioCodec)\r\n<span class=\"hljs-keyword\">if<\/span> avcodec.AvcodecParametersToContext(audioCodecContext, audioCodecParameters) &lt; <span class=\"hljs-number\">0<\/span> {\r\n<span class=\"hljs-built_in\">panic<\/span>(<span class=\"hljs-string\">\"\u65e0\u6cd5\u6253\u5f00\u97f3\u9891\u89e3\u7801\u5668\"<\/span>)\r\n}\r\n<span class=\"hljs-keyword\">if<\/span> avcodec.AvcodecOpen2(audioCodecContext, audioCodec, <span class=\"hljs-literal\">nil<\/span>) &lt; <span class=\"hljs-number\">0<\/span> {\r\n<span class=\"hljs-built_in\">panic<\/span>(<span class=\"hljs-string\">\"\u65e0\u6cd5\u6253\u5f00\u97f3\u9891\u89e3\u7801\u5668\"<\/span>)\r\n}\r\n<span class=\"hljs-keyword\">defer<\/span> avcodec.AvcodecClose(audioCodecContext)\r\n<span class=\"hljs-comment\">\/\/ \u6253\u5f00\u8f93\u51fa\u97f3\u9891\u6587\u4ef6<\/span>\r\noutputFileName := <span class=\"hljs-string\">\"output.mp3\"<\/span>\r\noutputFormatContext := avformat.AvformatAllocContext()\r\n<span class=\"hljs-keyword\">if<\/span> avformat.AvformatAllocOutputContext2(&amp;outputFormatContext, <span class=\"hljs-literal\">nil<\/span>, <span class=\"hljs-string\">\"\"<\/span>, outputFileName) &lt; <span class=\"hljs-number\">0<\/span> {\r\n<span class=\"hljs-built_in\">panic<\/span>(<span class=\"hljs-string\">\"\u65e0\u6cd5\u6253\u5f00\u8f93\u51fa\u97f3\u9891\u6587\u4ef6\"<\/span>)\r\n}\r\n<span class=\"hljs-keyword\">defer<\/span> avformat.AvformatFreeContext(outputFormatContext)\r\n<span class=\"hljs-comment\">\/\/ \u6dfb\u52a0\u97f3\u9891\u6d41\u5230\u8f93\u51fa\u6587\u4ef6<\/span>\r\noutputCodec := avcodec.AvcodecFindEncoder(avcodec.CodecId(avformat.AV_CODEC_ID_MP3))\r\n<span class=\"hljs-keyword\">if<\/span> outputCodec == <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-built_in\">panic<\/span>(<span class=\"hljs-string\">\"\u627e\u4e0d\u5230\u97f3\u9891\u7f16\u7801\u5668\"<\/span>)\r\n}\r\noutputStream := avformat.AvformatNewStream(outputFormatContext, <span class=\"hljs-literal\">nil<\/span>)\r\n<span class=\"hljs-keyword\">if<\/span> outputStream == <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-built_in\">panic<\/span>(<span class=\"hljs-string\">\"\u65e0\u6cd5\u521b\u5efa\u8f93\u51fa\u6d41\"<\/span>)\r\n}\r\noutputStream.SetCodec(outputCodec)\r\n<span class=\"hljs-comment\">\/\/ \u5206\u914d\u97f3\u9891\u5e27<\/span>\r\naudioFrame := avutil.AvFrameAlloc()\r\n<span class=\"hljs-keyword\">if<\/span> audioFrame == <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-built_in\">panic<\/span>(<span class=\"hljs-string\">\"\u65e0\u6cd5\u5206\u914d\u97f3\u9891\u5e27\"<\/span>)\r\n}\r\n<span class=\"hljs-comment\">\/\/ \u521d\u59cb\u5316\u8f6c\u6362\u5668\u4e0a\u4e0b\u6587<\/span>\r\nswrContext := swresample.SwrAllocSetOpts(\r\n<span class=\"hljs-literal\">nil<\/span>,\r\naudioCodecContext.ChannelLayout(),\r\naudioCodecContext.SampleFmt(),\r\naudioCodecContext.SampleRate(),\r\naudioCodecContext.ChannelLayout(),\r\naudioCodecContext.SampleFmt(),\r\naudioCodecContext.SampleRate(),\r\n<span class=\"hljs-number\">0<\/span>, <span class=\"hljs-literal\">nil<\/span>,\r\n)\r\n<span class=\"hljs-keyword\">if<\/span> swrContext == <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-built_in\">panic<\/span>(<span class=\"hljs-string\">\"\u65e0\u6cd5\u521d\u59cb\u5316\u97f3\u9891\u8f6c\u6362\u4e0a\u4e0b\u6587\"<\/span>)\r\n}\r\n<span class=\"hljs-keyword\">defer<\/span> swresample.SwrFree(swrContext)\r\n<span class=\"hljs-comment\">\/\/ \u521d\u59cb\u5316\u8f6c\u6362\u5668\u7f13\u51b2\u533a<\/span>\r\nmaxDstNbSamples := <span class=\"hljs-type\">int<\/span>(swrContext.GetOutSamples(maxSrcNbSamples))\r\ndstData := <span class=\"hljs-built_in\">make<\/span>([]<span class=\"hljs-type\">uint8<\/span>, maxDstNbSamples*avutil.SizeofUint16)\r\ndstSamples := <span class=\"hljs-built_in\">make<\/span>([][]<span class=\"hljs-type\">uint8<\/span>, audioCodecContext.Channels())\r\n<span class=\"hljs-keyword\">for<\/span> i :=\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>FFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u3001Go\u8a00\u8a9e\u3067\u30aa\u30fc\u30c7\u30a3\u30aa\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u5909\u63db\u3084\u5727\u7e2e\u306e\u305f\u3081\u306b\u3088\u304f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002FFmpeg\u306f\u3001\u30aa\u30fc\u30c7\u30a3\u30aa\u3084\u30d3\u30c7\u30aa\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u5f62\u5f0f\u3092\u51e6\u7406\u3067\u304d\u308b\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u30de\u30eb\u30c1\u30e1\u30c7\u30a3\u30a2\u51e6\u7406\u30c4\u30fc\u30eb\u3067\u3059\u3002 \u307e\u305a\u3001Go [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-123468","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Go\u3067FFmpeg\u3092\u4f7f\u7528\u3057\u3066\u97f3\u58f0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5909\u63db\u3068\u5727\u7e2e\u3092\u884c\u3046\u65b9\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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content=\"FFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u3001Go\u8a00\u8a9e\u3067\u30aa\u30fc\u30c7\u30a3\u30aa\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u5909\u63db\u3084\u5727\u7e2e\u306e\u305f\u3081\u306b\u3088\u304f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002FFmpeg\u306f\u3001\u30aa\u30fc\u30c7\u30a3\u30aa\u3084\u30d3\u30c7\u30aa\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u5f62\u5f0f\u3092\u51e6\u7406\u3067\u304d\u308b\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u30de\u30eb\u30c1\u30e1\u30c7\u30a3\u30a2\u51e6\u7406\u30c4\u30fc\u30eb\u3067\u3059\u3002 \u307e\u305a\u3001Go [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/go\u3067ffmpeg\u3092\u4f7f\u7528\u3057\u3066\u97f3\u58f0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5909\u63db\u3068\u5727\u7e2e\u3092\u884c\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-24T02:25:29+00:00\" \/>\n<meta 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