{"id":128708,"date":"2021-12-20T16:35:15","date_gmt":"2021-12-20T08:35:15","guid":{"rendered":"http:\/\/www.idc.net\/help\/128708\/"},"modified":"2021-12-20T16:35:15","modified_gmt":"2021-12-20T08:35:15","slug":"linux%e4%b8%8b%e4%bd%bf%e7%94%a8ffmpeg%e8%8e%b7%e5%8f%96%e9%9f%b3%e9%a2%91%e6%97%b6%e9%95%bf-linux-ffmpeg%e8%8e%b7%e5%8f%96%e9%9f%b3%e9%a2%91%e6%97%b6%e9%95%bf","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/128708\/","title":{"rendered":"Linux\u4e0b\u4f7f\u7528FFmpeg\u83b7\u53d6\u97f3\u9891\u65f6\u957f (linux ffmpeg\u83b7\u53d6\u97f3\u9891\u65f6\u957f)"},"content":{"rendered":"<p>FFmpeg\u662f\u4e00\u4e2a\u591a\u529f\u80fd\u7684\u5f00\u6e90\u97f3\u89c6\u9891\u89e3\u51b3\u65b9\u6848\uff0c\u53ef\u4ee5\u7528\u6765\u83b7\u53d6\u97f3\u9891\u6216\u89c6\u9891\u7684\u4fe1\u606f\u3001\u5904\u7406\u97f3\u89c6\u9891\u6587\u4ef6\u3001\u6d41\u5a92\u4f53\u4f20\u8f93\u7b49\u3002\u5728Linux\u5e73\u53f0\u4e0b\u4f7f\u7528FFmpeg\u83b7\u53d6\u97f3\u9891\u65f6\u957f\u975e\u5e38\u65b9\u4fbf\uff0c\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528FFmpeg\u83b7\u53d6\u97f3\u9891\u65f6\u957f\u3002<\/p>\n<p>\u5b89\u88c5FFmpeg<\/p>\n<p>\u9996\u5148\u9700\u8981\u5728Linux\u7cfb\u7edf\u4e0a\u5b89\u88c5FFmpeg\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5728Ubuntu\u7cfb\u7edf\u4e0b\u5b89\u88c5\u6700\u65b0\u7248\u672c\u7684FFmpeg\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>sudo apt-get update<\/p>\n<p>sudo apt-get install ffmpeg<\/p>\n<p>\u201c`<\/p>\n<p>\u83b7\u53d6\u97f3\u9891\u65f6\u957f<\/p>\n<p>\u6709\u591a\u79cd\u65b9\u5f0f\u53ef\u4ee5\u4f7f\u7528FFmpeg\u83b7\u53d6\u97f3\u9891\u65f6\u957f\uff0c\u4e0b\u9762\u5c06\u4ecb\u7ecd\u4e24\u79cd\u5e38\u89c1\u7684\u65b9\u5f0f\u3002<\/p>\n<p>1. \u4f7f\u7528ffprobe\u547d\u4ee4<\/p>\n<p>ffprobe\u662fFFmpeg\u5de5\u5177\u5957\u88c5\u4e2d\u7684\u4e00\u4e2a\u547d\u4ee4\u884c\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u6765\u83b7\u53d6\u97f3\u89c6\u9891\u7684\u4fe1\u606f\uff0c\u5305\u62ec\u65f6\u957f\u3001\u6bd4\u7279\u7387\u7b49\u7b49\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u83b7\u53d6\u97f3\u9891\u6587\u4ef6\u7684\u603b\u65f6\u957f\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>ffprobe -i [\u97f3\u9891\u6587\u4ef6\u8def\u5f84] -show_entries format=duration -v quiet -of csv=\u201dp=0\u2033<\/p>\n<p>\u201c`<\/p>\n<p>\u5176\u4e2d\uff0c[\u97f3\u9891\u6587\u4ef6\u8def\u5f84]\u4e3a\u5f85\u83b7\u53d6\u65f6\u957f\u7684\u97f3\u9891\u6587\u4ef6\u7684\u8def\u5f84\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u83b7\u53d6\u4e00\u4e2a\u540d\u4e3aaudio.mp3\u7684\u97f3\u9891\u6587\u4ef6\u7684\u65f6\u957f\uff0c\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>ffprobe -i audio.mp3 -show_entries format=duration -v quiet -of csv=\u201dp=0\u2033<\/p>\n<p>\u201c`<\/p>\n<p>\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>267.810000<\/p>\n<p>\u201c`<\/p>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u8be5\u97f3\u9891\u6587\u4ef6\u7684\u603b\u65f6\u957f\u4e3a267.81\u79d2\u3002<\/p>\n<p>2. \u4f7f\u7528ffmpeg\u547d\u4ee4<\/p>\n<p>\u9664\u4e86ffprobe\u547d\u4ee4\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528ffmpeg\u547d\u4ee4\u6765\u83b7\u53d6\u97f3\u9891\u6587\u4ef6\u7684\u65f6\u957f\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u83b7\u53d6\u97f3\u9891\u6587\u4ef6\u7684\u65f6\u957f\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>ffmpeg -i [\u97f3\u9891\u6587\u4ef6\u8def\u5f84] 2&gt;&amp;1 | grep \u2018Duration\u2019 | cut -d \u2018 \u2018 -f 4 | sed s\/,\/\/<\/p>\n<p>\u201c`<\/p>\n<p>\u5176\u4e2d\uff0c[\u97f3\u9891\u6587\u4ef6\u8def\u5f84]\u4e3a\u5f85\u83b7\u53d6\u65f6\u957f\u7684\u97f3\u9891\u6587\u4ef6\u7684\u8def\u5f84\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u83b7\u53d6\u4e00\u4e2a\u540d\u4e3aaudio.mp3\u7684\u97f3\u9891\u6587\u4ef6\u7684\u65f6\u957f\uff0c\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>ffmpeg -i audio.mp3 2&gt;&amp;1 | grep \u2018Duration\u2019 | cut -d \u2018 \u2018 -f 4 | sed s\/,\/\/<\/p>\n<p>\u201c`<\/p>\n<p>\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>00:04:27.81<\/p>\n<p>\u201c`<\/p>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u8be5\u97f3\u9891\u6587\u4ef6\u7684\u603b\u65f6\u957f\u4e3a4\u520627.81\u79d2\u3002<\/p>\n<p>\u7ed3\u8bba<\/p>\n<p>\u901a\u8fc7\u672c\u6587\u4ecb\u7ecd\u7684\u4e24\u79cd\u65b9\u6cd5\uff0c\u53ef\u4ee5\u4f7f\u7528FFmpeg\u5728Linux\u7cfb\u7edf\u4e0b\u65b9\u4fbf\u5730\u83b7\u53d6\u97f3\u9891\u6587\u4ef6\u7684\u65f6\u957f\u3002\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u8981\u9009\u62e9\u9002\u5408\u7684\u65b9\u6cd5\u3002\u76f8\u4fe1\u672c\u6587\u5bf9Linux\u7528\u6237\u4f7f\u7528FFmpeg\u83b7\u53d6\u97f3\u9891\u65f6\u957f\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<p><strong>\u76f8\u5173\u95ee\u9898\u62d3\u5c55\u9605\u8bfb\uff1a<\/strong><\/p>\n<ul>\n<li>ffmpeg # probesize &amp; yzeduration<\/li>\n<\/ul>\n<h3>ffmpeg # probesize &amp; yzeduration<\/h3>\n<p>ffmpeg\u5728avformat_find_stream_info\u4e2d\u4f1a\u8bfb\u53d6\u4e00\u90e8\u5206\u6e90\u6587\u4ef6\u7684\u97f3\u89c6\u9891\u6570\u636e\uff0c\u6765\u5206\u6790\u6587\u4ef6\u4fe1\u606f\uff0c\u90a3\u4e48\u8fd9\u4e2a\u64cd\u4f5c\u8bfb\u53d6\u591a\u5c11\u6570\u636e\u5462?<\/p>\n<p> \u7b54\u6848\u662f\uff1a <\/p>\n<p> \u901a\u8fc7probesize\u548cyzeduration\u4e24\u4e2a\u53c2\u6570\u6765\u63a7\u5236\u6db2\u5bdf<\/p>\n<p> \u3002<\/p>\n<p> \u76f4\u63a5\u7528\u547d\u4ee4\u884c\u67e5\u770b\u8fd9\u4e24\u4e2a\u53c2\u6570:<\/p>\n<p> -probesize\u548c -yzeduration\u5b9a\u4e49\u5728 libavformat\/options_table.h \u4e2d<\/p>\n<p> \u53ef\u4ee5\u770b\u5230probesize\u9ed8\u8ba4\u4e3a\uff0c \u800cyzeduration\u9ed8\u8ba4\u4e3a0.<\/p>\n<p> \u4f20\u5165\u7684\u53c2\u6570\u4fdd\u5b58\u5728 libavformat\/avformat.h \u4e2dAVFormatContext\u7684probesize\u548cmax_yze_duration\u53d8\u91cf\u4e2d\u3002<\/p>\n<p> \u4ece\u4e0a\u53ef\u4ee5\u770b\u51fa<\/p>\n<p> probesize\u662f\u4ece\u6e90\u6587\u4ef6\u4e2d\u8bfb\u53d6\u7684\u66f4\u5927\u5b57\u8282\u6570\uff0c\u5355\u4f4d\u4e3a\u5b57\u8282\u3002<\/p>\n<p> max_yze_duration\u662f\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u7684\u66f4\u5927\u65f6\u957f\uff0c\u5355\u4f4d\u4e3a AV_TIME_BASE units<\/p>\n<p> \u3002<\/p>\n<p> probesize\u7684\u5355\u4f4d\u662f\u5b57\u8282\u3002<\/p>\n<p> \u6700\u5c0f\u662f32\u5b57\u8282\u3002\u95f9\u4f59\u8304<\/p>\n<p> \u9ed8\u8ba4\u662f\u5b57\u8282\u3002<\/p>\n<p> avformat_find_stream_info\u51fd\u6570\u4e2d:<\/p>\n<p> \u53ef\u4ee5\u770b\u5230yzeduration\u53c2\u6570\u4e0d\u8bbe\u7f6e\u65f6\uff0c\u5373yzeduration\u9ed8\u8ba4\u7b49\u4e8e0\u65f6\uff0c\u53ef\u4ee5\u770b\u5230<\/p>\n<p> \u9ed8\u8ba4\u7684\u5206\u6790\u65f6\u957f\u4e3a5\u79d2<\/p>\n<p> :<\/p>\n<p> \u800c\u5982\u679c\u662fflv\u6587\u4ef6\u7684\u65f6\u5019, \u9ed8\u8ba4\u4e3a90\u79d2<\/p>\n<p> \uff1a<\/p>\n<p> mpeg\u548cmpegts\u6587\u4ef6\u7684\u65f6\u5019\uff0c\u9ed8\u8ba47\u79d2<\/p>\n<p> :<\/p>\n<p> \u7ed3\u8bba\u662f: <\/p>\n<p> \u8c01\u5148\u8fbe\u5230\u5c31\u542c\u8c01\u7684<\/p>\n<p> \u3002<\/p>\n<\/p>\n<p> \u4ee5\u4e0a\u7684\u4f8b\u5b50\u662f\u8bfb\u53d650M\u7684\u6570\u636e\u6216100\u79d2\u7684\u6570\u636e\uff0c\u90a3\u4e2a\u6807\u51c6\u5148\u8fbe\u5230\uff0c\u90a3\u5c31\u542c\u8c01\u7684\uff0c\u505c\u6b62probe<\/p>\n<p> \u3002\u6bc1\u597d<\/p>\n<p> ffmpeg\/doc\/ffmpeg-formats.texi<\/p>\n<p> ffmpeg\/doc\/faq.texi<\/p>\n<p>\u5173\u4e8elinux ffmpeg\u83b7\u53d6\u97f3\u9891\u65f6\u957f\u7684\u4ecb\u7ecd\u5230\u6b64\u5c31\u7ed3\u675f\u4e86\uff0c\u4e0d\u77e5\u9053\u4f60\u4ece\u4e2d\u627e\u5230\u4f60\u9700\u8981\u7684\u4fe1\u606f\u4e86\u5417 \uff1f\u5982\u679c\u4f60\u8fd8\u60f3\u4e86\u89e3\u66f4\u591a\u8fd9\u65b9\u9762\u7684\u4fe1\u606f\uff0c\u8bb0\u5f97\u6536\u85cf\u5173\u6ce8\u672c\u7ad9\u3002<\/p>\n<p><a href=\"http:https:\/\/idc.net\/\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\u9996\u9009\u540e\u6d6a\u4e91\uff0c2H2G\u9996\u670810\u5143\u5f00\u901a\u3002<br \/>\u540e\u6d6a\u4e91\uff08www.IDC.Net\uff09\u63d0\u4f9b\u7b80\u5355\u597d\u7528\uff0c\u4ef7\u683c\u539a\u9053\u7684\u9999\u6e2f\/\u7f8e\u56fd\u4e91\u670d\u52a1\u5668\u548c\u72ec\u7acb\u670d\u52a1\u5668\u3002IDC+ISP+ICP\u8d44\u8d28\u3002ARIN\u548cAPNIC\u4f1a\u5458\u3002\u6210\u719f\u6280\u672f\u56e2\u961f15\u5e74\u884c\u4e1a\u7ecf\u9a8c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>FFmpeg\u662f\u4e00\u4e2a\u591a\u529f\u80fd\u7684\u5f00\u6e90\u97f3\u89c6\u9891\u89e3\u51b3\u65b9\u6848\uff0c\u53ef\u4ee5\u7528\u6765\u83b7\u53d6\u97f3\u9891\u6216\u89c6\u9891\u7684\u4fe1\u606f\u3001\u5904\u7406\u97f3\u89c6\u9891\u6587\u4ef6\u3001\u6d41\u5a92\u4f53\u4f20\u8f93\u7b49\u3002\u5728L [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[],"class_list":["post-128708","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/128708","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=128708"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/128708\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=128708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=128708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=128708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}