{"id":391,"date":"2022-01-31T18:13:42","date_gmt":"2022-01-31T10:13:42","guid":{"rendered":"http:\/\/192.168.0.122:8088\/?p=391"},"modified":"2022-06-11T03:14:49","modified_gmt":"2022-06-10T19:14:49","slug":"ffmpeg%e5%91%bd%e4%bb%a4%e5%88%86%e6%9e%90-ss","status":"publish","type":"post","link":"https:\/\/www.xianwaizhiyin.net\/?p=391","title":{"rendered":"ffmpeg\u547d\u4ee4\u5206\u6790-ss"},"content":{"rendered":"\n<p>\u672c\u7cfb\u5217 \u4ee5 ffmpeg4.2 \u6e90\u7801\u4e3a\u51c6\uff0c\u4e0b\u8f7d\u5730\u5740\uff1a\u94fe\u63a5\uff1a<a href=\"https:\/\/pan.baidu.com\/s\/1VpUvpLhew-nuq4Dns80mOw\">\u767e\u5ea6\u7f51\u76d8<\/a> \u63d0\u53d6\u7801\uff1ag3k8<\/p>\n\n\n\n<p>\u672c\u7cfb\u5217\u4e3b\u8981\u5206\u6790\u5404\u79cd ffmpeg \u547d\u4ee4\u53c2\u6570 \u5728\u4ee3\u7801\u91cc\u662f\u5982\u4f55\u5b9e\u73b0\u7684\u3002a.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<p>\u547d\u4ee4\u5982\u4e0b\uff1a<code class=\"prettyprint\" >ffmpeg -ss 3 -i a.mp4 a2.mp4<\/code><\/p>\n\n\n\n<p><strong>-ss 3<\/strong> \uff0cseek \u5230\u8f93\u5165\u6587\u4ef6\u7684\u7b2c\u4e09\u79d2\u5f00\u59cb\u63d0\u53d6\u89c6\u9891<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p><strong>\u547d\u4ee4\u884c\u53c2\u6570 -ss \u5b9a\u4e49\u5982\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >ffmpeg_opt.c 3412\u884c\n{ &quot;ss&quot;,HAS_ARG | OPT_TIME | OPT_OFFSET | OPT_INPUT | OPT_OUTPUT,{ .off = OFFSET(start_time) }, &quot;set the start time offset&quot;, &quot;time_off&quot; },<\/code><\/pre>\n\n\n\n<p>\u4ece\u4e0a\u9762\u5b9a\u4e49\u53ef\u4ee5\u770b\u51fa\uff0c<strong>-ss 3<\/strong> \u4f1a\u89e3\u6790\u8d4b\u503c \u7ed9 OptionsContext \u7684 start_time \u5b57\u6bb5\u3002<\/p>\n\n\n\n<p>\u5728\u524d\u9762\u6587\u7ae0\u300aFFmpeg\u6e90\u7801\u5206\u6790-\u547d\u4ee4\u884c\u300b\uff0c\u5206\u6790\u8fc7\u547d\u4ee4\u884c\u53c2\u6570\u7684\u7c7b\u522b\uff0c\u4e3b\u8981\u67093\u7c7b\u3002<\/p>\n\n\n\n<p>1\uff0c\u4f5c\u7528\u4e8e \u8f93\u5165\u6587\u4ef6 \u7684\u53c2\u6570\u3002<\/p>\n\n\n\n<p>2\uff0c\u4f5c\u7528\u4e8e \u8f93\u51fa\u6587\u4ef6 \u7684\u53c2\u6570\u3002<\/p>\n\n\n\n<p>3\uff0c\u5168\u5c40\u53c2\u6570\u3002<\/p>\n\n\n\n<p>\u56e0\u4e3a -ss \u662f\u5728 -i \u524d\u9762\uff0c\u6240\u4ee5 \u73b0\u5728\u7684 -ss \u662f\u4f5c\u7528\u4e8e\u8f93\u5165\u6587\u4ef6\u7684\u53c2\u6570\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>\u4e0b\u9762\u5c31\u6765\u770b\u770b OptionsContext \u7684 start_time \u6700\u540e\u7528\u5728\u54ea\u91cc\uff0c\u5982\u4e0b\u622a\u56fe<\/p>\n\n\n\n<figure 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