{"id":9069,"date":"2020-05-12T05:44:09","date_gmt":"2020-05-12T05:44:09","guid":{"rendered":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/?p=9069"},"modified":"2021-09-07T01:20:13","modified_gmt":"2021-09-07T01:20:13","slug":"20200512%e4%bd%9c%e6%a5%ad%e3%83%a1%e3%83%a2-ffmpeg-%e3%81%a7%e5%8b%95%e7%94%bb%e3%82%92%e5%88%86%e5%89%b2","status":"publish","type":"post","link":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/?p=9069","title":{"rendered":"(20200512\u4f5c\u696d\u30e1\u30e2) ffmpeg \u3067\u52d5\u753b\u3092\u5206\u5272\uff0c\u97f3\u91cf\u3092\u3042\u3052\u308b"},"content":{"rendered":"<p><strong>\u52d5\u753b\u3092\u5206\u5272\u3059\u308b<\/strong><\/p>\n<p><a href=\"https:\/\/nico-lab.net\/cutting_ffmpeg\/\">\u3053\u306e\u30b5\u30a4\u30c8<\/a>\u3092\u53c2\u8003\u306b\u3057\u307e\u3057\u305f\u3002\u30b3\u30de\u30f3\u30c9\u3092\u8a18\u9332\u3057\u307e\u3059\u3002<\/p>\n<pre><code style=\"color:midnightblue; font-size:12px;white-space:pre-wrap\">ffmpeg -ss [duration] -to [hh:mm:ss] -i input.mp4 -c copy output.mp4<\/code><\/pre>\n<p>duration \u306f\u79d2\u5358\u4f4d\u3002\u5148\u982d\u304b\u3089 duration \u3067\u6307\u5b9a\u3055\u308c\u308b\u6642\u9593\u3092\u30ab\u30c3\u30c8\u3057\u3066\uff0chh:mm:ss \u3067\u6307\u5b9a\u3055\u308c\u308b\u3068\u3053\u308d\u307e\u3067\u3092\u5207\u308a\u51fa\u3059\u3002<\/p>\n<p>\u306a\u305c\u304b\uff0c\u6700\u8fd1\u4e0a\u8a18\u306e\u65b9\u6cd5\u304c\u5931\u6557\u3059\u308b\u3002\u3053\u3061\u3089\u3082\u691c\u8a0e\u3057\u3066\u307f\u308b\u30023174 \u306f\u30b9\u30bf\u30fc\u30c8\u306e\u6642\u523b\uff0c1745 \u306f\u305d\u3053\u304b\u3089\u306e\u6642\u9593\uff08\u9593\u9694\uff09\u3002<\/p>\n<pre><code style=\"color:midnightblue; font-size:12px;white-space:pre-wrap\">ffmpeg.exe -ss 3174 -t 1745 -i original.mp4 -c copy output.mp4<\/code><\/pre>\n<p><strong>\u97f3\u91cf\u3092\u4e0a\u3052\u308b<\/strong><\/p>\n<p>\u53c2\u8003\u30b5\u30a4\u30c8\u306f<a href=\"https:\/\/qiita.com\/mml\/items\/c28d69ab889eb36dd522\">\u3053\u3053<\/a>\u3067\u3059\u3002\u30b3\u30de\u30f3\u30c9\u3092\u8a18\u9332\u3057\u307e\u3059\u3002\u307e\u305a\u4e2d\u8eab\u306e\u8abf\u67fb\u3002\u6700\u5927\u97f3\u91cf(max-volume)\u3092\u898b\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre><code style=\"color:midnightblue; font-size:12px;white-space:pre-wrap\">ffmpeg -i inputfilename -vn -af volumedetect -f null -<\/code><\/pre>\n<p>\u5148\u306e\u30b5\u30a4\u30c8\u306b\u4f9d\u308c\u3070\uff0cmax-volume \u3092 0 dB \u7a0b\u5ea6\u306b\u3059\u308c\u3070\u826f\u3044\u3088\u3046\u3067\u3059\u3002\u4e0b\u8a18\u306f\uff0c +6 dB \u3042\u3052\u308b\u5834\u5408\u306e\u30b3\u30de\u30f3\u30c9\u3067\u3059\u3002<\/p>\n<pre><code style=\"color:midnightblue; font-size:12px;white-space:pre-wrap\">ffmpeg -i inputfilename -af volume=6dB outputfilename<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u52d5\u753b\u3092\u5206\u5272\u3059\u308b \u3053\u306e\u30b5\u30a4\u30c8\u3092\u53c2\u8003\u306b\u3057\u307e\u3057\u305f\u3002\u30b3\u30de\u30f3\u30c9\u3092\u8a18\u9332\u3057\u307e\u3059\u3002 ffmpeg &#8230; <a class=\"more-link\" href=\"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/?p=9069\">Read More &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-9069","post","type-post","status-publish","format-standard","hentry","category-column"],"_links":{"self":[{"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9069","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9069"}],"version-history":[{"count":8,"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9069\/revisions"}],"predecessor-version":[{"id":10605,"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9069\/revisions\/10605"}],"wp:attachment":[{"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9069"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9069"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9069"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}