{"id":6387,"date":"2017-12-19T07:04:11","date_gmt":"2017-12-19T07:04:11","guid":{"rendered":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/?p=6387"},"modified":"2018-01-12T01:50:08","modified_gmt":"2018-01-12T01:50:08","slug":"ffmpeg%e3%83%a1%e3%83%a2","status":"publish","type":"post","link":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/?p=6387","title":{"rendered":"ffmpeg\u30e1\u30e2"},"content":{"rendered":"<p>\u53c2\u8003\u306b\u3057\u305f\u30b5\u30a4\u30c8<\/p>\n<p><a href=\"https:\/\/qiita.com\/makotok7\/items\/0e7d2f941e5da8cec8d1\">ffprobe\u3067\u52d5\u753b\u3092\u89e3\u6790\u3059\u308b<\/a><br \/>\n<a href=\"http:\/\/fixedpoint.jp\/ffmpeg\/ffmpeg-doc.html\">http:\/\/fixedpoint.jp\/ffmpeg\/ffmpeg-doc.html<\/a><br \/>\n<a href=\"http:\/\/takuya-1st.hatenablog.jp\/entry\/2014\/01\/14\/104752\">ffmpeg \u3067\u6307\u5b9a\u79d2\u6570\u3092\u5207\u308a\u51fa\u3057\u3066\u52d5\u753b\u3092\u6642\u9593\u3067\u5206\u5272\u3059\u308b<\/a><br \/>\n<a href=\"https:\/\/stackoverflow.com\/questions\/15931437\/ffmpeg-how-to-control-fps-tbr-tbn-tbc-parameters\">ffmpeg how to control fps tbr tbn tbc parameters<br \/>\n<\/a><\/p>\n<p>\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3055\u308c\u305f\u52d5\u753b\u30d5\u30a1\u30a4\u30eb\u3092\u30c7\u30fc\u30bf\u30fc\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3059\u308b\u3053\u3068\u3092\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u591a\u69d8\u306a\u30b5\u30a4\u30ba\u3084\u30af\u30aa\u30ea\u30c6\u30a3\u30fc\u306e\u30d5\u30a1\u30a4\u30eb\u304c\u9001\u3089\u308c\u3066\u304f\u308b\u3068\u60f3\u5b9a\u3057\u3066\uff0c\u30b5\u30a4\u30ba\u7b49\u306e\u5909\u63db\u3092\u3057\u307e\u3059\u3002<br \/>\n\u3000\u6700\u521d\u306b\uff0c\u6bd4\u3092\u4fdd\u3063\u305f\u307e\u307e\u30b5\u30a4\u30ba\u306e\u5909\u66f4\u3092\u3059\u308b\u305f\u3081\u306b\uff0c\u52d5\u753b\u30d5\u30a1\u30a4\u30eb\u306e\u7e26\u6a2a\u306e\u30b5\u30a4\u30ba\u3092\u5f97\u305f\u3044\u306e\u3067\u3059\u304c\u3001\u4ee5\u4e0b\u3067\u306f ffprobe \u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u4f59\u8a08\u306a\u51fa\u529b\u3092\u3057\u306a\u3044\u305f\u3081\u306b -v quiet -hide_banner \u3092\u4ed8\u3051\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre><code style=\"color:midnightblue; font-size:12px;\">$tmp=\"ffprobe -v quiet -hide_banner -show_streams -print_format json test.webm\";\r\n$str = shell_exec($tmp);\r\n$tmpjson = json_decode($str,true);\r\necho $tmpjson['streams'][0]['width'].\"\\n\";\r\necho $tmpjson['streams'][0]['height'].\"\\n\";<\/code><\/pre>\n<p>\u5909\u63db\u3059\u308b\u5834\u5408\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u3042\u3052\u307e\u3059\u3002-i \u306f\u5165\u529b\u30d5\u30a1\u30a4\u30eb\u306e\u6307\u5b9a\u3001-strict -2 \u306f<a href=\"http:\/\/fftest33.blog.fc2.com\/blog-entry-38.html\">\u97f3\u58f0\u30b3\u30fc\u30c7\u30c3\u30af\u306eaac\u304c\u5b9f\u9a13\u7684\u306a\u5b9f\u88c5\u3068\u3044\u3046\u3053\u3068\u3067\u3064\u3051\u3066\u3044\u307e\u3059<\/a>\u3002-y \u306f\u30d5\u30a1\u30a4\u30eb\u306e\u4e0a\u66f8\u304d\u3092\u78ba\u8a8d\u3057\u306a\u3044\u305f\u3081\u3001-s \u306f\u30b5\u30a4\u30ba\u306e\u6307\u5b9a\u3067\u3059\u304c\u3001\u6570\u5b57\u306f\u5076\u6570\u3067\u306a\u3044\u3068\u30a8\u30e9\u30fc\u3068\u306a\u308b\u3088\u3046\u3067\u3059\u3002-t \u306f\u79d2\u6570\u306e\u6307\u5b9a\u3067\u3001\u3053\u3053\u3067\u306f\u52d5\u753b\u306e\u5148\u982d\u304b\u308930\u79d2\u9593\u3092\u5909\u63db\u3059\u308b\u3088\u3046\u306b\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u9577\u3051\u308c\u3070\u5909\u63db\u304c\u9014\u4e2d\u3067\u6253\u3061\u5207\u3089\u308c\u307e\u3059\u304c\u300130\u79d2\u3088\u308a\u77ed\u3044\u52d5\u753b\u3092\u5909\u63db\u3057\u3066\u3082\u30a8\u30e9\u30fc\u3068\u306f\u306a\u3089\u305a\u3001\u5143\u306e\u30d5\u30a1\u30a4\u30eb\u306e\u9577\u3055\u3068\u540c\u3058\u9577\u3055\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre><code style=\"color:midnightblue; font-size:12px;\">ffmpeg -v quiet -hide_banner -i test.webm -strict -2 -y -s 640x428 -t 30 sample.mp4<\/code><\/pre>\n<p>WEBRTC \u306e\u6280\u8853\u3092\u5229\u7528\u3057\u3066\u3001\u52d5\u753b\u3092\u6295\u7a3f\u3059\u308b\u30b5\u30a4\u30c8\u3092\u4f5c\u6210\u3057\u3066\u307f\u307e\u3057\u305f\u3002\u30d6\u30e9\u30a6\u30b6\u304b\u3089\u30ab\u30e1\u30e9\u3068\u30de\u30a4\u30af\u3092\u5236\u5fa1\u3057\u3066\u52d5\u753b\u3092\u53d6\u308a\u8fbc\u307f\u307e\u3059\u3002<\/p>\n<p><a href=\"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/wp-content\/uploads\/2017\/12\/QA.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/wp-content\/uploads\/2017\/12\/QA-300x167.png\" alt=\"QA\" width=\"300\" height=\"167\" class=\"aligncenter size-medium wp-image-6416\" srcset=\"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/wp-content\/uploads\/2017\/12\/QA-300x167.png 300w, http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/wp-content\/uploads\/2017\/12\/QA-768x428.png 768w, http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/wp-content\/uploads\/2017\/12\/QA-600x334.png 600w, http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/wp-content\/uploads\/2017\/12\/QA.png 797w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>\u74b0\u5883\u306b\u3088\u308b\u306e\u3067\u3059\u304c\u3001\u52d5\u753b\u306e\u5909\u63db\u306b\u304b\u306a\u308a\u6642\u9593\u304c\u304b\u304b\u308b\u5834\u5408\u304c\u3042\u3063\u3066\u3001windows7 \u4e0a\u3067\u3001\u540c\u3058 firefox \u3067\u3082\u30d1\u30bd\u30b3\u30f3\u306b\u3088\u3063\u3066\u4e0a\u624b\u304f\u3044\u3063\u305f\u308a\u3044\u304b\u306a\u304b\u3063\u305f\u308a\u3057\u307e\u3059\u3002\u6642\u9593\u304c\u304b\u304b\u308b\u4e0a\u306b\u3001\u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u306e\u30b5\u30a4\u30ba\u3082\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002\u4e21\u65b9\u306e\u5834\u5408\u306e\u3001\u30d6\u30e9\u30a6\u30b6\u304c\u4f5c\u6210\u3057\u305f\u5143\u52d5\u753b\u3092 ffprobe \u3067\u8abf\u3079\u3066\u307f\u307e\u3057\u305f\u3002\u4e0b\u8a18\u304c\u305d\u306e\u51fa\u529b\u7d50\u679c\u3067\u3059\u3002<\/p>\n<pre><code style=\"color:midnightblue; font-size:12px;\">Input #0, matroska,webm, from 'img13':\r\n  Metadata:\r\n    encoder         : QTmuxingAppLibWebM-0.0.1\r\n  Duration: N\/A, start: 0.001000, bitrate: N\/A\r\n    Stream #0:0(eng): Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 1k tbr, 1k tbn, 1k tbc (default)\r\n    Stream #0:1(eng): Audio: opus, 48000 Hz, mono, fltp (default)\r\n\r\nInput #0, matroska,webm, from 'img19':\r\n  Metadata:\r\n    encoder         : QTmuxingAppLibWebM-0.0.1\r\n  Duration: N\/A, start: 0.001000, bitrate: N\/A\r\n    Stream #0:0(eng): Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 28.75 fps, 28.75 tbr, 1k tbn, 1k tbc (default)\r\n    Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default)<\/code><\/pre>\n<p>\u4e0a\u65b9\u306e img13 \u304c\u4e0a\u624b\u304f\u3044\u304b\u306a\u3044\u5834\u5408\u3001\u4e0b\u65b9\u306e img19 \u304c\u4e0a\u624b\u304f\u5909\u63db\u3055\u308c\u308b\u5834\u5408\u3067\u3059\u3002\u6bd4\u8f03\u3059\u308b\u3068\u3001fps \u306b\u95a2\u3059\u308b\u60c5\u5831\u304c\u6b20\u843d\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u6839\u62e0\u306f\u306a\u3044\u306e\u3067\u3059\u304c\u3001fps \u304c\u304a\u304b\u3057\u306a\u5024\u306e\u5834\u5408\u306b\u306f\u5f37\u5236\u7684\u306b30\u306b\u8a2d\u5b9a\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u305f\u3002&#8221;-r 30&#8243; \u3068\u3044\u3046\u90e8\u5206\u304c\u305d\u3046\u3067\u3059\u3002<\/p>\n<pre><code style=\"color:midnightblue; font-size:12px;\">ffmpeg -v quiet -hide_banner -i img13 -r 30 -strict -2 -y -s 640x480 -t 60 img13.mp4<\/code><\/pre>\n<p>\u3053\u308c\u3067\u5909\u63db\u304c\u901f\u304f\u306a\u308a\u307e\u3057\u305f\u3002 <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u53c2\u8003\u306b\u3057\u305f\u30b5\u30a4\u30c8 ffprobe\u3067\u52d5\u753b\u3092\u89e3\u6790\u3059\u308b http:\/\/fixedpoi &#8230; <a class=\"more-link\" href=\"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/?p=6387\">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-6387","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\/6387","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=6387"}],"version-history":[{"count":23,"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6387\/revisions"}],"predecessor-version":[{"id":6421,"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6387\/revisions\/6421"}],"wp:attachment":[{"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6387"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/zairyo.susi.oita-u.ac.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}