{"id":2007,"date":"2016-02-15T00:13:53","date_gmt":"2016-02-14T15:13:53","guid":{"rendered":"http:\/\/uda2.com\/blog\/?p=2007"},"modified":"2018-10-31T00:49:08","modified_gmt":"2018-10-30T15:49:08","slug":"scroll_video_seek","status":"publish","type":"post","link":"https:\/\/uda2.com\/blog\/scroll_video_seek\/","title":{"rendered":"\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u52d5\u753b\u3092\u30b7\u30fc\u30af"},"content":{"rendered":"<p>MacPro\u306e\u30b5\u30a4\u30c8\u3084\u3061\u3087\u3063\u3068\u524d\u306e\u30aa\u30ad\u30ca\u30ef\u30fc\u30ba\u3067\u4f7f\u308f\u308c\u3066\u308b\u52d5\u753b\u3092\u30b9\u30af\u30ed\u30fc\u30eb\u91cf\u3067\u65e9\u9001\u308a\u5dfb\u304d\u623b\u3057\u3059\u308b\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u6280\u3092\u8a66\u3057\u3066\u307f\u305f\u3002<br \/>\n<a href=\"http:\/\/uda2.com\/scrollvideo\/\" target=\"_blank\">DEMO<\/a><br \/>\n<!--more--><br \/>\n\u4eca\u56de\u306f\u8868\u793a\u901f\u5ea6\u3092\u5c11\u3057\u3067\u3082\u901f\u3081\u308b\u305f\u3081\u306bjQuery\u3058\u3083\u306a\u304f\u751f\u306eJavascript\u3067\u66f8\u3044\u3066\u307f\u305f\u3002<\/p>\n<pre><code>document.addEventListener(\"DOMContentLoaded\", init, false);\r\nfunction init() {\r\n\tvar video = document.getElementById(\"myVideo\");\r\n\tvar scrollObj = document.documentElement;\r\n\tif (navigator.userAgent.indexOf('WebKit') != -1) scrollObj = document.body;\r\n\tvar sizeObj = document.documentElement;\r\n\tif (video) {\r\n\t\tvar duration = 0;\r\n\t\tvar targetframe = 0;\r\n\t\tif (navigator.userAgent.indexOf('Firefox') != -1) duration = video.duration;\r\n\t\tvideo.addEventListener('loadedmetadata', function() {\r\n\t\t\tduration = video.duration;\r\n\t\t});\r\n\t\tdocument.addEventListener(\"scroll\", function () {\r\n\t\t\tif (duration == 0) return;\r\n\t\t\tvar scrollTop = scrollObj.scrollTop;\r\n\t\t\tvar winheight = sizeObj.clientHeight;\r\n\t\t\tif (scrollTop > 100) video.style.opacity = 1;\r\n\t\t\telse video.style.opacity = 0.5 + scrollTop\/200;\r\n\t\t\ttargetframe = Math.floor(duration*(scrollTop\/(10000-winheight))*10)\/10;\r\n\t\t}, false);\r\n\t\tsetInterval(function () {\r\n\t\t\tvar now = video.currentTime;\/\/console.log(now);\r\n\t\t\tif (now > targetframe) {\r\n\t\t\t\tnow -= 1;\r\n\t\t\t\tif (now <= targetframe) now = targetframe;\r\n\t\t\t\tvideo.currentTime = now;\r\n\t\t\t} else if (now < targetframe) {\r\n\t\t\t\tnow += 1;\r\n\t\t\t\tif (now >= targetframe) now = targetframe;\r\n\t\t\t\tvideo.currentTime = now;\r\n\t\t\t}\r\n\t\t}, 1000 \/ 10);\/\/10fps\r\n\t}\r\n}<\/code><\/pre>\n<p>\u30d6\u30e9\u30a6\u30b6\u306b\u3088\u308b\u30d6\u30ec\u3082IE8\u4ee5\u524d\u3092\u7121\u8996\u3057\u305f\u306e\u3067\u5c11\u306a\u304f\u3001\u751fJavascript\u306e\u5272\u306b\u30b7\u30f3\u30d7\u30eb\u306b\u306a\u3063\u305f\u3002<br \/>\n\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u5ea6\u306b\u30b7\u30fc\u30af\u3059\u308b\u3068\u53cd\u5fdc\u304c\u6c17\u6301\u3061\u60aa\u304b\u3063\u305f\u306e\u3067\u30b9\u30af\u30ed\u30fc\u30eb\u6642\u306f\u30b7\u30fc\u30af\u5148\u306e\u79d2\u6570\u3092\u8a18\u61b6\u3057\u3066\u304a\u3044\u3066\u300110fps\u306e\u30a4\u30f3\u30bf\u30fc\u30d0\u30eb\u3092\u7528\u610f\u3057\u3001\u3053\u306e\u4e2d\u3067\u5148\u307b\u3069\u6307\u5b9a\u3057\u305f\u30b7\u30fc\u30af\u5148\u306b\u8fd1\u3065\u3051\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u66f8\u304f\u4e8b\u3067\u30b9\u30e0\u30fc\u30ba\u306a\u30b9\u30af\u30ed\u30fc\u30eb\u306b\u3057\u3066\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MacPro\u306e\u30b5\u30a4\u30c8\u3084\u3061\u3087\u3063\u3068\u524d\u306e\u30aa\u30ad\u30ca\u30ef\u30fc\u30ba\u3067\u4f7f\u308f\u308c\u3066\u308b\u52d5\u753b\u3092\u30b9\u30af\u30ed\u30fc\u30eb\u91cf\u3067\u65e9\u9001\u308a\u5dfb\u304d\u623b\u3057\u3059\u308b\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u6280\u3092\u8a66\u3057\u3066\u307f\u305f\u3002 DEMO<\/p>\n","protected":false},"author":2,"featured_media":2009,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[205],"tags":[66,315],"class_list":["post-2007","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-creatorsdiary","tag-javascript","tag-315"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/uda2.com\/blog\/wp-json\/wp\/v2\/posts\/2007","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/uda2.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/uda2.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/uda2.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/uda2.com\/blog\/wp-json\/wp\/v2\/comments?post=2007"}],"version-history":[{"count":2,"href":"https:\/\/uda2.com\/blog\/wp-json\/wp\/v2\/posts\/2007\/revisions"}],"predecessor-version":[{"id":2278,"href":"https:\/\/uda2.com\/blog\/wp-json\/wp\/v2\/posts\/2007\/revisions\/2278"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/uda2.com\/blog\/wp-json\/wp\/v2\/media\/2009"}],"wp:attachment":[{"href":"https:\/\/uda2.com\/blog\/wp-json\/wp\/v2\/media?parent=2007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/uda2.com\/blog\/wp-json\/wp\/v2\/categories?post=2007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/uda2.com\/blog\/wp-json\/wp\/v2\/tags?post=2007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}