{"id":17771,"date":"2016-01-05T23:34:09","date_gmt":"2016-01-05T14:34:09","guid":{"rendered":"https:\/\/cg-method.com\/after-effects\/?p=17771"},"modified":"2026-10-03T17:14:03","modified_gmt":"2026-10-03T08:14:03","slug":"after-effects-composition-name-number-expression","status":"publish","type":"post","link":"https:\/\/cg-method.com\/after-effects\/after-effects-composition-name-number-expression\/","title":{"rendered":"After Effects\u3067\u30b3\u30f3\u30dd\u540d\u306e\u672b\u5c3e\u756a\u53f7\u3092\u53c2\u7167\u3059\u308b\uff5c\u6587\u5b57\u30fb\u9023\u756a\u753b\u50cf"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u30b3\u30f3\u30dd\u540d\u306e\u672b\u5c3e\u306b_1\u30fb_2\u30fb_3\u3092\u4ed8\u3051\u3001\u5bfe\u5fdc\u3059\u308b\u6587\u7ae0\u3084\u9023\u756a\u753b\u50cf\u3092\u9078\u3073\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u80cc\u666f_\u30b3\u30f3\u30dd_3\u300d\u306e\u3088\u3046\u306b\u9014\u4e2d\u306b\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u304c\u3042\u3063\u3066\u3082\u3001\u672b\u5c3e\u756a\u53f7\u3060\u3051\u3092\u53c2\u7167\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u7d42\u8abf\u67fb\u65e5\uff1a2026\u5e7410\u67083\u65e5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4eee\u306e\u5165\u529b\u5024\u3068\u69cb\u6587\u3092\u30ed\u30fc\u30ab\u30eb\u3067\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4eca\u56deAE\u672c\u4f53\u3067\u306e\u8868\u793a\u30fb\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u78ba\u8a8d\u306f\u884c\u3063\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30bd\u30fc\u30b9\u30c6\u30ad\u30b9\u30c8\u3092\u540d\u524d\u306e\u756a\u53f7\u3067\u5207\u308a\u66ff\u3048\u308b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7df4\u7fd2\u30b3\u30f3\u30dd\u540d\u3092\u300c\u30b3\u30f3\u30dd_1\u300d\u306b\u3057\u3001\u30c6\u30ad\u30b9\u30c8\u306e\u300c\u30bd\u30fc\u30b9\u30c6\u30ad\u30b9\u30c8\u300d\u306b\u6b21\u306e\u5f0f\u3092\u8cbc\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u5f8c\u306e\u6587\u5b57\u5217\u3092\u8fd4\u3059\u5f0f\u3067\u3001sourceText\u30d7\u30ed\u30d1\u30c6\u30a3\u3078\u4ee3\u5165\u3057\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" tabindex=\"0\" aria-label=\"\u6a2a\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u308b\u30b3\u30fc\u30c9\"><code>var choices = [&quot;\u304a\u306f\u3088\u3046&quot;, &quot;\u3053\u3093\u306b\u3061\u306f&quot;, &quot;\u304a\u3084\u3059\u307f&quot;];\nvar match = thisComp.name.match(\/_([1-9][0-9]*)$\/);\nvar number = match ? Number(match[1]) : 0;\n(number &gt;= 1 &amp;&amp; number &lt;= choices.length) ? choices[number - 1] : &quot;&quot;;\n<\/code><\/pre><\/div>\n\n\n\n<figure class=\"wp-block-table\" tabindex=\"0\" aria-label=\"\u6a2a\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u308b\u6bd4\u8f03\u8868\"><table class=\"has-fixed-layout\" style=\"min-width:24em\"><thead><tr><th style=\"min-width:8em !important\">\u5165\u529b\u30fb\u6761\u4ef6<\/th><th style=\"min-width:8em !important\">\u671f\u5f85\u3059\u308b\u7d50\u679c<\/th><th style=\"min-width:8em !important\">\u78ba\u8a8d\u70b9<\/th><\/tr><\/thead><tbody><tr><td>\u30b3\u30f3\u30dd_1<\/td><td>\u304a\u306f\u3088\u3046<\/td><td>\u914d\u5217\u306e1\u756a\u76ee<\/td><\/tr><tr><td>\u80cc\u666f_\u30b3\u30f3\u30dd_3<\/td><td>\u304a\u3084\u3059\u307f<\/td><td>\u672b\u5c3e\u3060\u3051\u53c2\u7167<\/td><\/tr><tr><td>\u30b3\u30f3\u30dd_4\u30fb\u30b3\u30f3\u30dd\u30fb\u30b3\u30f3\u30dd_0<\/td><td>\u7a7a\u6587\u5b57<\/td><td>\u7bc4\u56f2\u5916\u3068\u5f62\u5f0f\u9055\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">choices\u3078\u6587\u7ae0\u3092\u8ffd\u52a0\u3059\u308b\u3068\u3001\u305d\u306e\u914d\u5217\u306e\u6570\u307e\u3067\u756a\u53f7\u3092\u4f7f\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8907\u88fd\u3057\u305f\u30b3\u30f3\u30dd\u306e\u540d\u524d\u306f\u78ba\u8a8d\u3057\u3001\u5fc5\u8981\u306a\u672b\u5c3e\u756a\u53f7\u3078\u624b\u52d5\u3067\u5909\u66f4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e7\u5f0f\u306eeval\u306f\u3001\u5b58\u5728\u3057\u306a\u3044text4\u306a\u3069\u3092\u5b9f\u884c\u3057\u3088\u3046\u3068\u3057\u3066\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fee\u6b63\u7248\u306f\u914d\u5217\u306e\u7bc4\u56f2\u3092\u78ba\u8a8d\u3057\u3066\u53d6\u308a\u51fa\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1\u304b\u3089\u6570\u3048\u305f\u9023\u756a\u753b\u50cf\u3092\u9078\u3076<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u756a\u53f71\u30fb2\u30fb3\u3068\u8aad\u3081\u308b\u7df4\u7fd2\u753b\u50cf\u30923\u679a\u7528\u610f\u3057\u3001\u9023\u756a\u3068\u3057\u3066\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7d20\u6750\u306e\u89e3\u91c8\u306f24fps\u3001\u7df4\u7fd2\u30b3\u30f3\u30dd\u306f30fps\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9023\u756a\u30ec\u30a4\u30e4\u30fc\u306e\u30bf\u30a4\u30e0\u30ea\u30de\u30c3\u30d7\u3092\u6709\u52b9\u306b\u3057\u3001\u30bf\u30a4\u30e0\u30ea\u30de\u30c3\u30d7\u3078\u6b21\u306e\u5f0f\u3092\u8cbc\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u52d5\u753b\u3084\u9023\u756a\u306e\u8aad\u307f\u8fbc\u307f\u304c\u524d\u63d0\u3067\u3001\u901a\u5e38\u306e\u9759\u6b62\u753b\u30ec\u30a4\u30e4\u30fc\u306b\u306f\u4f7f\u3044\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" tabindex=\"0\" aria-label=\"\u6a2a\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u308b\u30b3\u30fc\u30c9\"><code>var match = thisComp.name.match(\/_([1-9][0-9]*)$\/);\nvar number = match ? Number(match[1]) : 0;\nvar step = thisLayer.source.frameDuration;\nvar frames = Math.floor(thisLayer.source.duration \/ step + 0.000001);\nvar result = value;\nif (number &gt;= 1 &amp;&amp; isFinite(step) &amp;&amp; step &gt; 0 &amp;&amp; frames &gt;= 1) {\n    result = (Math.min(number, frames) - 1) * step;\n}\nresult;\n<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u756a\u53f71\u306f\u7d20\u6750\u6642\u523b0\u3001\u756a\u53f73\u306f\u7d20\u6750\u6642\u523b2\/24\u79d2\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">fps\u3092\u7701\u7565\u3057\u305fframesToTime\u306f\u30b3\u30f3\u30dd\u57fa\u6e96\u306b\u306a\u308b\u305f\u3081\u3001\u3053\u306e\u5f0f\u306f\u7d20\u6750\u81ea\u8eab\u306eframeDuration\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\" tabindex=\"0\" aria-label=\"\u6a2a\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u308b\u6bd4\u8f03\u8868\"><table class=\"has-fixed-layout\" style=\"min-width:24em\"><thead><tr><th style=\"min-width:8em !important\">\u5165\u529b\u30fb\u6761\u4ef6<\/th><th style=\"min-width:8em !important\">\u671f\u5f85\u3059\u308b\u7d50\u679c<\/th><th style=\"min-width:8em !important\">\u78ba\u8a8d\u70b9<\/th><\/tr><\/thead><tbody><tr><td>\u30b3\u30f3\u30dd_1\uff0f\u7d20\u675024fps<\/td><td>\u7d20\u6750\u6642\u523b0<\/td><td>1\u679a\u76ee<\/td><\/tr><tr><td>\u30b3\u30f3\u30dd_3\uff0f\u7d20\u675024fps<\/td><td>\u7d20\u6750\u6642\u523b0.083333\u2026\u79d2<\/td><td>3\u679a\u76ee<\/td><\/tr><tr><td>\u30b3\u30f3\u30dd_99\uff0f3\u679a\u306e\u7d20\u6750<\/td><td>\u7d20\u6750\u6642\u523b0.083333\u2026\u79d2<\/td><td>\u6700\u5f8c\u306e\u6709\u52b9\u30d5\u30ec\u30fc\u30e0\u3078\u5236\u9650<\/td><\/tr><tr><td>\u756a\u53f7\u306a\u3057<\/td><td>\u5f0f\u3092\u5165\u308c\u308b\u524d\u306e\u5024<\/td><td>value\u3092\u8fd4\u3059<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u30a8\u30e9\u30fc\u30fb\u623b\u3057\u65b9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6587\u5b57\u304c\u7a7a\u306a\u3089\u672b\u5c3e\u756a\u53f7\u3068\u914d\u5217\u306e\u4ef6\u6570\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u753b\u50cf\u304c\u9055\u3046\u5834\u5408\u306f\u7d20\u6750\u3092\u958b\u304d\u3001\u89e3\u91c8\u3057\u305ffps\u30fb\u679a\u6570\u30fb\u8aad\u307f\u8fbc\u307f\u9806\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5909\u66f4\u524d\u306b\u30b3\u30f3\u30dd\u3068\u7d20\u6750\u8a2d\u5b9a\u3092\u4fdd\u7ba1\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u623b\u3059\u3068\u304d\u306f\u5f0f\u3092\u30aa\u30d5\u306b\u3057\u3001\u5143\u306e\u30bd\u30fc\u30b9\u30c6\u30ad\u30b9\u30c8\u3084\u30bf\u30a4\u30e0\u30ea\u30de\u30c3\u30d7\u306e\u30ad\u30fc\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7d20\u6750\u306e\u89e3\u91c8\u3092\u5909\u66f4\u3057\u305f\u5834\u5408\u306f\u5143\u306e\u8a2d\u5b9a\u3078\u623b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e2\u5b58GitHub\u306e\u53c2\u8003\u30b3\u30fc\u30c9\u306f\u65e7\u5f0f\u306e\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4eca\u56de\u306e\u4fee\u6b63\u7248\u306f\u3053\u306e\u672c\u6587\u306e\u5f0f\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u53c2\u7167\u8cc7\u6599<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/helpx.adobe.com\/after-effects\/desktop\/work-with-expressions\/expression-language-reference\/expression-language-reference.html\">Adobe\u306e\u6642\u9593\u5909\u63db\u30fb\u7d20\u6750\u53c2\u7167\u8cc7\u6599<\/a>\u3092\u53c2\u7167\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u95a2\u9023\u8a18\u4e8b\u30fb\u65e2\u5b58\u306e\u53c2\u8003\u8cc7\u6599<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u3058\u533a\u753b\u306e\u95a2\u9023\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5404\u8a18\u4e8b\u306e\u8cbc\u4ed8\u5148\u3068\u78ba\u8a8d\u7bc4\u56f2\u3092\u78ba\u8a8d\u3057\u3066\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-postLink\">\t\t\t<div class=\"p-blogCard -internal\" data-type=\"type1\" data-onclick=\"clickLink\">\n\t\t\t\t<div class=\"p-blogCard__inner\">\n\t\t\t\t\t<span class=\"p-blogCard__caption\">\u3042\u308f\u305b\u3066\u8aad\u307f\u305f\u3044<\/span>\n\t\t\t\t\t<div class=\"p-blogCard__thumb c-postThumb\"><figure class=\"c-postThumb__figure\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cg-method.com\/after-effects\/wp-content\/uploads\/2026\/09\/after-effects-matome-3-300x169.jpg\" alt=\"\" class=\"c-postThumb__img u-obf-cover\" width=\"320\" height=\"180\"><\/figure><\/div>\t\t\t\t\t<div class=\"p-blogCard__body\">\n\t\t\t\t\t\t<a class=\"p-blogCard__title\" href=\"https:\/\/cg-method.com\/after-effects\/after-effects-matome\/\">After Effects\u306e\u4f7f\u3044\u65b9\u307e\u3068\u3081\uff5c\u30a8\u30af\u30b9\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3\u30fb\u66f8\u304d\u51fa\u3057\u30fb\u30d7\u30e9\u30b0\u30a4\u30f3<\/a>\n\t\t\t\t\t\t<span class=\"p-blogCard__excerpt\">After Effects\u306e\u8a18\u4e8b\u3092\u3001\u4f5c\u308a\u305f\u3044\u8868\u73fe\u3084\u56f0\u3063\u3066\u3044\u308b\u4f5c\u696d\u304b\u3089\u63a2\u305b\u308b\u3088\u3046\u306b\u307e\u3068\u3081\u307e\u3057\u305f\u3002\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u5165\u529b\u3059\u308b\u30a8\u30af\u30b9\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3\u3068\u3001jsx\u30d5\u30a1\u30a4\u30eb\u3092\u5b9f\u884c\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u306f&#8230;<\/span>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n<div class=\"swell-block-postLink\">\t\t\t<div class=\"p-blogCard -internal\" data-type=\"type1\" data-onclick=\"clickLink\">\n\t\t\t\t<div class=\"p-blogCard__inner\">\n\t\t\t\t\t<span class=\"p-blogCard__caption\">\u3042\u308f\u305b\u3066\u8aad\u307f\u305f\u3044<\/span>\n\t\t\t\t\t<div class=\"p-blogCard__thumb c-postThumb\"><figure class=\"c-postThumb__figure\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cg-method.com\/after-effects\/wp-content\/uploads\/2026\/01\/after-effects-display-current-layer-name-expression-300x169.jpg\" alt=\"\" class=\"c-postThumb__img u-obf-cover\" width=\"320\" height=\"180\"><\/figure><\/div>\t\t\t\t\t<div class=\"p-blogCard__body\">\n\t\t\t\t\t\t<a class=\"p-blogCard__title\" href=\"https:\/\/cg-method.com\/after-effects\/after-effects-display-current-layer-name-expression\/\">After Effects\u3067\u518d\u751f\u4f4d\u7f6e\u306e\u66f2\u540d\u3092\u8868\u793a\uff5cIN\u30fbOUT\u3068\u97f3\u58f0\u30b9\u30a4\u30c3\u30c1<\/a>\n\t\t\t\t\t\t<span class=\"p-blogCard__excerpt\">\u518d\u751f\u4f4d\u7f6e\u306b\u3042\u308bBGM\u30ec\u30a4\u30e4\u30fc\u306e\u540d\u524d\u3092\u30c6\u30ad\u30b9\u30c8\u3078\u51fa\u3057\u307e\u3059\u3002 \u5bfe\u8c61\u306f\u8868\u793a\u30c6\u30ad\u30b9\u30c8\u3088\u308a\u4e0b\u306b\u3042\u308a\u3001\u540d\u524d\u304cBGM_\u3067\u59cb\u307e\u308b\u30ec\u30a4\u30e4\u30fc\u3067\u3059\u3002 \u6700\u7d42\u8abf\u67fb\u65e5\uff1a2026\u5e7410\u67083\u65e5\u3002 \u6570\u5024\u30fb\u53c2\u7167&#8230;<\/span>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n<div class=\"swell-block-postLink\">\t\t\t<div class=\"p-blogCard -internal\" data-type=\"type1\" data-onclick=\"clickLink\">\n\t\t\t\t<div class=\"p-blogCard__inner\">\n\t\t\t\t\t<span class=\"p-blogCard__caption\">\u3042\u308f\u305b\u3066\u8aad\u307f\u305f\u3044<\/span>\n\t\t\t\t\t<div class=\"p-blogCard__thumb c-postThumb\"><figure class=\"c-postThumb__figure\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cg-method.com\/after-effects\/wp-content\/uploads\/2026\/09\/after-effects-valueattime-300x169.jpg\" alt=\"\" class=\"c-postThumb__img u-obf-cover\" width=\"320\" height=\"180\"><\/figure><\/div>\t\t\t\t\t<div class=\"p-blogCard__body\">\n\t\t\t\t\t\t<a class=\"p-blogCard__title\" href=\"https:\/\/cg-method.com\/after-effects\/after-effects-valueattime\/\">After Effects\u2502valueAtTime\u3067\u6642\u9593\u3092\u305a\u3089\u3057\u3066\u52d5\u304b\u3059\u30a8\u30af\u30b9\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3\uff5c\u8ffd\u3044\u304b\u3051\u308b\u30fb\u9045\u308c\u3066\u52d5\u304f<\/a>\n\t\t\t\t\t\t<span class=\"p-blogCard__excerpt\">valueAtTime \u306f\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u300c\u6307\u5b9a\u3057\u305f\u6642\u9593\u306e\u5024\u300d\u3092\u53d6\u308a\u51fa\u3059\u30a8\u30af\u30b9\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3\u3067\u3059\u3002 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