{"id":707,"date":"2022-02-14T16:12:08","date_gmt":"2022-02-14T08:12:08","guid":{"rendered":"http:\/\/124.223.94.246\/?p=707"},"modified":"2022-06-11T02:53:38","modified_gmt":"2022-06-10T18:53:38","slug":"707","status":"publish","type":"post","link":"https:\/\/www.xianwaizhiyin.net\/?p=707","title":{"rendered":"ffmpeg\u547d\u4ee4\u5206\u6790-tee\u8f93\u51fa\u591a\u8def\u6d41"},"content":{"rendered":"\n<p>\u672c\u6587 \u4ee5 ffmpeg4.4 \u6e90\u7801\u4e3a\u51c6\uff0ca.mp4\u4e0b\u8f7d\u94fe\u63a5\uff1a<a href=\"https:\/\/pan.baidu.com\/s\/1RN1xRsQDGx65MGyB_T1IzA\">\u767e\u5ea6\u7f51\u76d8<\/a>\uff0c\u63d0\u53d6\u7801\uff1anl0s \u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u65e9\u671f FFmpeg \u5728 \u8f6c \u7801 \u540e \u8f93\u51fa \u76f4\u64ad \u6d41 \u65f6\u5e76 \u4e0d\u652f\u6301 \u7f16\u7801 \u4e00\u6b21 \u4e4b\u540e \u540c\u65f6 \u8f93\u51fa \u591a\u8def \u76f4\u64ad \u6d41\uff0c \u9700\u8981 \u4f7f\u7528 \u7ba1\u9053 \u65b9\u5f0f \u8fdb\u884c \u8f93\u51fa\uff0c \u800c\u5728 \u65b0\u7248\u672c \u7684 FFmpeg \u4e2d \u5df2\u7ecf \u652f\u6301 tee \u6587\u4ef6 \u5c01\u88c5 \u53ca \u534f\u8bae \u8f93\u51fa\uff0c \u53ef\u4ee5 \u4f7f\u7528 tee \u8fdb\u884c \u591a\u8def \u6d41 \u8f93\u51fa\uff0c \u672c\u8282 \u5c06 \u4e3b\u8981 \u8bb2\u89e3 \u7ba1\u9053 \u65b9\u5f0f \u8f93\u51fa \u591a\u8def \u6d41 \u4e0e tee \u534f\u8bae \u8f93\u51fa \u65b9\u5f0f \u8f93\u51fa \u591a\u8def \u6d41\u3002<\/p><p>\u5218\u6b67; \u8d75\u6587\u6770. FFmpeg\u4ece\u5165\u95e8\u5230\u7cbe\u901a (\u7535\u5b50\u4e0e\u5d4c\u5165\u5f0f\u7cfb\u7edf\u8bbe\u8ba1\u4e1b\u4e66) (p. 405). \u5317\u4eac\u534e\u7ae0\u56fe\u6587\u4fe1\u606f\u6709\u9650\u516c\u53f8. Kindle Edition.<\/p><\/blockquote>\n\n\n\n<p>\u672c\u6587\u4e3b\u8981\u8bb2\u89e3 tee \u65b9\u5f0f \u8f93\u51fa\u591a\u8def\u6d41 \u5728 ffmpeg.c \u91cc\u9762\u7684\u903b\u8f91\u5b9e\u73b0\uff0c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >ffmpeg.exe -re -i a.mp4 -vcodec h264_mf -acodec aac -map 0 -f tee &quot;&#091;f=flv]tcp:\/\/127.0.0.1:1234\/live\/stream | &#091;f=flv]rtmp:\/\/192.168.0.122\/live\/livestream&quot;<\/code><\/pre>\n\n\n\n<p>\u4e0a\u9762\u7684\u547d\u4ee4 \u97f3\u9891\u7f16\u7801 \u4e3a AAC\uff0c\u89c6\u9891\u7f16\u7801\u4e3a H264\uff0c\u8f6c\u6210 flv \u7684\u5c01\u88c5\uff0c\u7136\u540e\u63a8\u4e86\u4e24\u8def\u6d41\u3002<\/p>\n\n\n\n<p>1\uff0ctcp \u6d41\uff0c\u628a flv \u7684\u6570\u636e\u653e\u5728 tcp \u5305\u91cc\u9762\u8fdb\u884c\u4f20\u8f93\u3002<\/p>\n\n\n\n<p>2\uff0crtmp \u6d41\uff0c\u628aflv \u7684\u6570\u636e\u653e\u5728 rtmp \u4e0a\u5c42\u8fdb\u884c\u4f20\u8f93\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e24\u8def\u6d41\u7684\u670d\u52a1\u5668\u8bf7\u81ea\u884c\u642d\u5efa\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>google_ads_content<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u9996\u5148\u5206\u6790 <code class=\"prettyprint\" >-map 0<\/code> \u53c2\u6570\u5728 ffmpeg.c \u91cc\u9762\u7684\u903b\u8f91\uff0cmap \u7684\u5b9a\u4e49\u5728 ffmpeg_opt.c \u91cc\u9762\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >{ &quot;map&quot;,            HAS_ARG | OPT_EXPERT | OPT_PERFILE |\n                    OPT_OUTPUT,                                  { .func_arg = opt_map },\n    &quot;set input stream mapping&quot;,\n    &quot;&#091;-]input_file_id&#091;:stream_specifier]&#091;,sync_file_id&#091;:stream_specifier]]&quot; },<\/code><\/pre>\n\n\n\n<p><code class=\"prettyprint\" >&quot;[-]input_file_id[:stream_specifier][,sync_file_id[:stream_specifier]]&quot;<\/code> \u8fd9\u53e5\u6ce8\u91ca\uff0c\u6211\u4e5f\u6ca1\u770b\u51fa\u8fd9\u4e2a map \u7684\u5177\u4f53\u7528\u6cd5\uff0c\u6240\u4ee5\u76f4\u63a5\u5206\u6790\u4ee3\u7801\u903b\u8f91\uff0c\u4ece\u4ee3\u7801\u903b\u8f91\u63a8\u5bfc\u51fa map\u7684 \u5177\u4f53\u7528\u6cd5\u3002<\/p>\n\n\n\n<p>\u4ece\u4ee3\u7801\u53ef\u4ee5\u770b\u51fa map \u4f1a\u8c03\u7528 opt_map \u51fd\u6570\u3002opt_map \u91cc\u9762\u4f1a \u64cd\u4f5c\u8fd9\u4e24\u4e2a\u53d8\u91cf <code class=\"prettyprint\" >o-&gt;nb_stream_maps<\/code> \u8ddf <code>o-&gt;stream_maps<\/code>\uff0c \u8fd9\u91cc\u9762\u6709\u4e00\u4e2a\u65b0\u7684\u7ed3\u6784 StreamMap\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >typedef struct StreamMap {\n    int disabled;           \/* 1 is this mapping is disabled by a negative map *\/\n    int file_index;\n    int stream_index;\n    int sync_file_index;\n    int sync_stream_index;\n    char *linklabel;       \/* name of an output link, for mapping lavfi outputs *\/\n} StreamMap;<\/code><\/pre>\n\n\n\n<p>opt_map\u51fd\u6570 \u7684\u91cd\u70b9\u5982\u4e0b\uff0c\u5df2\u7ecf\u5708\u51fa\u6765\u4e86\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"978\" height=\"748\" src=\"\/wp-content\/uploads\/2022\/02\/tee-1-1.png\" alt=\"\" class=\"wp-image-710\"\/><\/figure>\n\n\n\n<p><code class=\"prettyprint\" >o-&gt;nb_stream_maps<\/code> \u4f1a\u5bf9\u54ea\u4e9b\u903b\u8f91\u4ea7\u751f\u5f71\u54cd\u5462\uff1f\u8bf7\u7ee7\u7eed\u5f80\u4e0b\u770b\uff0c<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1092\" height=\"399\" src=\"\/wp-content\/uploads\/2022\/02\/tee-1-2.png\" alt=\"\" class=\"wp-image-711\"\/><\/figure>\n\n\n\n<p>\u4ece\u4e0a\u56fe\u53ef\u4ee5\u770b\u5230\uff0c\u5728 open_output_file \u51fd\u6570\u91cc\u9762\u4f7f\u7528\u4e86 nb_stream_maps \u8fd9\u4e2a\u53d8\u91cf\uff0c\u5982\u679c\u8fd9\u4e2a nb_stream_maps \u662f 0\uff0c\u5c31\u4f1a\u6267\u884c\u4ee5\u4e0b\u903b\u8f91\uff1a<\/p>\n\n\n\n<p>1\uff0c\u4ece\u8f93\u5165\u6587\u4ef6 \u9009\u51fa\u5206\u8fa8\u7387\u6700\u9ad8\u7684\u89c6\u9891\u6d41 \u4f5c\u4e3a \u89c6\u9891\u8f93\u51fa\u6d41\u7684 \u8f93\u5165\u3002<\/p>\n\n\n\n<p>2\uff0c\u4ece\u8f93\u5165\u6587\u4ef6 \u9009\u51fa\u58f0\u9053\u6570\u6700\u591a\u7684\u97f3\u9891\u6d41 \u4f5c\u4e3a \u97f3\u9891\u8f93\u51fa\u6d41\u7684 \u8f93\u5165\u3002<\/p>\n\n\n\n<p>\u7531\u4e8e \u6211\u4eec\u547d\u4ee4\u884c\u6307\u5b9a \u4e86 <code class=\"prettyprint\" >-map 0<\/code>\uff0c\u6240\u4ee5 nb_stream_maps \u7b49\u4e8e 2\uff0c\u56e0\u4e3a a.mp4 \u91cc\u9762\u6709\u4e24\u4e2a\u6d41\u3002\u6240\u4ee5\u4e0d\u4f1a\u8d70\u4e0a\u9762\u7684\u903b\u8f91\u3002\u800c\u662f\u8d70\u4e0b\u9762\u7684 else{}.<\/p>\n\n\n\n<p>open_output_file \u91cc\u9762\u7684\u91cd\u70b9\u903b\u8f91\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"945\" height=\"768\" src=\"\/wp-content\/uploads\/2022\/02\/tee-1-3.png\" alt=\"\" class=\"wp-image-709\"\/><\/figure>\n\n\n\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u672c\u6587\u7684\u547d\u4ee4\u4f1a\u8dd1\u8fdb\u53bb\u7ea2\u7b14\u5708\u51fa\u6765\u7684\u903b\u8f91\u3002<\/p>\n\n\n\n<p><code class=\"prettyprint\" >-map<\/code> \u53c2\u6570 \u5206\u6790\u5b8c\u6bd5\uff0c\u8fd9\u4e2a map \u9009\u9879 \u662f\u5bf9\u591a\u4e2a\u8f93\u5165\u8f93\u51fa\u6d41 \u505a\u6307\u5b9a\u7684\uff0c\u6307\u5b9a\u54ea\u4e2a\u8f93\u5165\u6d41\u5bf9\u5e94\u54ea\u4e2a\u8f93\u51fa\u6d41\u3002<\/p>\n\n\n\n<p><code class=\"prettyprint\" >-map 0<\/code> \u540e\u9762\u5e26\u4e00\u4e2a 0 \uff0c\u5b9e\u73b0\u7684\u529f\u80fd\u5c31\u662f \u628a\u8f93\u5165\u6587\u4ef6\u7684\u6240\u6709\u6d41\u90fd\u8f93\u51fa\u7ed9\u8f93\u51fa\u6587\u4ef6\uff0c\u4e0d\u9009\u6700\u597d\u7684\u6d41\u8fdb\u884c\u8f93\u51fa\uff0c\u6240\u6709\u6d41\u90fd\u8f93\u51fa\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u63a5\u4e0b\u6765 \u5206\u6790 -f tee \u7684\u5b9e\u73b0\uff0c<code class=\"prettyprint\" >-f<\/code> \u7684\u5b9a\u4e49\u5728 ffmpeg_opt.c \u91cc\u9762\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >{ &quot;f&quot;,              HAS_ARG | OPT_STRING | OPT_OFFSET |\n                    OPT_INPUT | OPT_OUTPUT,                      { .off       = OFFSET(format) },\n    &quot;force format&quot;, &quot;fmt&quot; },<\/code><\/pre>\n\n\n\n<p>\u5982\u679c\u4f60\u770b\u8fc7\u4e4b\u524d\u7684\u535a\u5ba2\u6587\u7ae0\uff0c\u5c31\u77e5\u9053 f \u662f\u5f3a\u5236\u6307\u5b9a\u5c01\u88c5\u683c\u5f0f\uff0c\u6240\u4ee5 tee \u80af\u5b9a\u662f\u4e00\u4e2a\u7c7b\u4f3c flv \u4e4b\u7c7b\u7684\u4f2a\u5c01\u88c5\u683c\u5f0f\u3002<\/p>\n\n\n\n<p>\u9996\u5148 -f \u7684\u89e3\u6790\u662f\u8fd9\u6837\u7684\uff0c-f tee \u6700\u540e\u4f1a\u4ee5 key=value \u7684\u65b9\u5f0f\uff0c\u4e5f\u5c31\u662f f=tee \u7684\u65b9\u5f0f\u4e22\u8fdb\u53bb o-&gt;g-&gt;format_opts\uff0c\u7136\u540e\u7ed9 avformat_open_input \u51fd\u6570\u7528\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >err = avformat_open_input(&amp;ic, filename, file_iformat, &amp;o-&gt;g-&gt;format_opts);<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5 -f tee \u8ddf -f flv \u662f\u7c7b\u4f3c\u7684\uff0c\u5728 api \u5c42\u4f7f\u7528\u6ca1\u6709\u592a\u5927\u7684\u533a\u522b\u3002<\/p>\n\n\n\n<p>\u8fd9\u6837\u4e00\u770b \u5c31\u77e5\u9053 tee \u80af\u5b9a\u662f \u5728 libavformat \u76ee\u5f55\u4e0b\u6709\u4e2a c\u6587\u4ef6\u7684\u5b9e\u73b0\uff0c\u679c\u7136\uff0c<code class=\"prettyprint\" >libavformat\\tee.c<\/code> \u6587\u4ef6\u5b58\u5728\uff0c\u90e8\u5206\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >static const AVClass tee_muxer_class = {\n    .class_name = &quot;Tee muxer&quot;,\n    .item_name  = av_default_item_name,\n    .option = options,\n    .version    = LIBAVUTIL_VERSION_INT,\n};<\/code><\/pre>\n\n\n\n<p>\u8fd9\u662f\u4e00\u4e2a \u4f2a\u5c01\u88c5\u683c\u5f0f\uff0c\u5e76\u4e0d\u662f\u771f\u6b63\u610f\u4e49\u7684\u97f3\u89c6\u9891\u5c01\u88c5\u683c\u5f0f\uff0c\u53ea\u662f\u4e3a\u4e86 api \u51fd\u6570\u7684\u901a\u7528\u6027\u8bbe\u8ba1\u51fa\u6765\u7684\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>tee \u8fd8\u6709\u53e6\u4e00\u79cd\u5199\u6cd5\uff0c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >ffmpeg.exe -re -i a.mp4 -vcodec h264_mf -acodec aac -map 0 -f flv &quot;tee:tcp:\/\/127.0.0.1:1234\/live\/stream|rtmp:\/\/192.168.0.122\/live\/livestream&quot;<\/code><\/pre>\n\n\n\n<p>\u8fd9\u79cd\u5199\u6cd5 tee \u770b\u8d77\u662f\u4e00\u79cd\u534f\u8bae\uff0c\u800c\u4e0d\u662f\u4e00\u79cd\u5c01\u88c5\uff0c\u5b9e\u9645\u4e0a\u662f\u4e00\u6837\u7684\uff0c\u8fd9\u4e5f\u662f\u4e00\u4e2a\u4f2a\u534f\u8bae\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u7248\u6743\u6240\u5c5e\uff1a\u77e5\u8bc6\u661f\u7403\uff1a\u5f26\u5916\u4e4b\u97f3\uff0cQQ\uff1a2338195090\u3002 \u7531\u4e8e\u7b14\u8005\u7684\u6c34\u5e73\u6709\u9650\uff0c \u52a0\u4e4b\u7f16\u5199\u7684\u540c\u65f6\u8fd8\u8981\u53c2\u4e0e\u5f00\u53d1\u5de5\u4f5c\uff0c\u6587\u4e2d\u96be\u514d\u4f1a\u51fa\u73b0\u4e00\u4e9b\u9519\u8bef\u6216\u8005\u4e0d\u51c6\u786e\u7684\u5730\u65b9\uff0c\u6073\u8bf7\u8bfb\u8005\u6279\u8bc4\u6307\u6b63\u3002\u5982\u679c\u8bfb\u8005\u6709\u4efb\u4f55\u5b9d\u8d35\u610f\u89c1\uff0c\u53ef\u4ee5\u52a0\u6211\u5fae\u4fe1 Loken1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587 \u4ee5 ffmpeg4.4 \u6e90\u7801\u4e3a\u51c6\uff0ca.mp4\u4e0b\u8f7d\u94fe\u63a5\uff1a\u767e\u5ea6\u7f51\u76d8\uff0c\u63d0\u53d6\u7801\uff1anl0s \u3002 \u65e9\u671f FFmpeg [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,17],"tags":[],"class_list":["post-707","post","type-post","status-publish","format-standard","hentry","category-ffmpeg","category-ffmpeg-cmds"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>ffmpeg\u547d\u4ee4\u5206\u6790-tee\u8f93\u51fa\u591a\u8def\u6d41 - \u5f26\u5916\u4e4b\u97f3<\/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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