{"id":89616,"date":"2026-08-12T01:17:20","date_gmt":"2026-08-11T23:17:20","guid":{"rendered":"https:\/\/playdeck.tv\/?p=89616"},"modified":"2026-08-12T02:14:37","modified_gmt":"2026-08-12T00:14:37","slug":"recording-cc-scte","status":"publish","type":"post","link":"https:\/\/playdeck.tv\/zh\/recording-cc-scte\/","title":{"rendered":"\u5f55\u5236\u9690\u85cf\u5f0f\u5b57\u5e55\u4e0eSCTE"},"content":{"rendered":"<p class=\"wp-block-paragraph\">PLAYDECK \u53ef\u4ee5\u5f55\u5236&nbsp;<strong>\u5b57\u5e55<\/strong>&nbsp;\u4ee5\u53ca&nbsp;<strong>SCTE-35<\/strong>&nbsp;\u4fdd\u5b58\u4e3a\u6587\u4ef6\u2014\u2014\u4f46&nbsp;<strong>\u5e76\u975e\u6240\u6709\u5bb9\u5668\u90fd\u540c\u65f6\u652f\u6301\u8fd9\u4e24\u9879<\/strong>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5b57\u5e55<\/strong>&nbsp;\u53ef\u4ee5\u8fdb\u5165&nbsp;<strong>MKV&nbsp;<\/strong>\u6216&nbsp;<strong>MPEG-TS<\/strong>&nbsp;\uff08\u4ee5\u53ca\u76f8\u5173\u7684\u6d41\u5a92\u4f53\u5f0f\u5f55\u97f3\uff09\u3002.<\/li>\n\n\n\n<li><strong>SCTE-35<\/strong>&nbsp;\u4ec5\u6d89\u53ca&nbsp;<strong>MPEG-TS<\/strong>&nbsp;(<code>.ts<\/code>)\uff0c\u800c\u4e0d\u662fMKV\u683c\u5f0f\u3002.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u77e9\u9635\u4e0e\u5b9a\u4e49\u57df\uff1a&nbsp;<a href=\"https:\/\/playdeck.tv\/zh\/cc-scte\/\">\u9690\u85cf\u5f0f\u5b57\u5e55\u4e0eSCTE\u2014\u2014\u6982\u8ff0<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u672c\u6587\u5185\u5bb9\uff1a<\/strong><br>\u2192 <a href=\"#enable\" data-type=\"internal\" data-id=\"#enable\">\u5e94\u542f\u7528\u54ea\u4e9b\u529f\u80fd<\/a><br>\u2192 <a href=\"#containers\" data-type=\"internal\" data-id=\"#enable\">MKV \u4e0e MPEG-TS<\/a><br>\u2192 <a href=\"#sidecars\" data-type=\"internal\" data-id=\"#sidecars\">Sidecar \u6587\u4ef6\uff08.scc \/ .anc\uff09<\/a><br>\u2192 <a href=\"#verify\" data-type=\"internal\" data-id=\"#verify\">\u9a8c\u8bc1\u64ad\u653e<\/a><br>\u2192 <a href=\"#related\">\u76f8\u5173<\/a><br><\/p>\n\n\n<style>.wp-block-kadence-spacer.kt-block-spacer-89616_fac651-40 .kt-block-spacer{height:60px;}.wp-block-kadence-spacer.kt-block-spacer-89616_fac651-40 .kt-divider{border-top-width:1px;height:1px;border-top-color:#eee;width:100%;border-top-style:solid;}<\/style>\n<div class=\"wp-block-kadence-spacer aligncenter kt-block-spacer-89616_fac651-40\" id=\"enable\"><div class=\"kt-block-spacer kt-block-spacer-halign-center\"><hr class=\"kt-divider\"\/><\/div><\/div>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>\u5e94\u542f\u7528\u54ea\u4e9b\u529f\u80fd<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u201c\u53c2\u6570\/\u914d\u7f6e\u5b57\u7b26\u4e32\u201d\u4e2d\uff0c\u8bbe\u7f6e\u60a8\u9700\u8981\u7684\u6807\u5fd7\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>embed_cc='true'\nembed_scte35='true'\nscc_capture='true'\nanc_capture='true'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u53c2\u6570<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u76ee\u7684<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\"><code>embed_cc='true'<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5c06 CC \u5d4c\u5165\u89c6\u9891\u57fa\u672c\u6d41\u4e2d\uff08\u4f8b\u5982 H.264 \/ MPEG-2\uff09<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><code>scc_capture='true'<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5199\u4e00\u7bc7\u5e73\u884c\u6587&nbsp;<code><strong>.scc<\/strong><\/code>&nbsp;\u6587\u4ef6 (CEA-608)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><code>anc_capture='true'<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5199\u4e00\u7bc7\u5e73\u884c\u6587&nbsp;<code><strong>.anc<\/strong><\/code>&nbsp;\u6587\u4ef6 (CEA-708)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><code>embed_scte35='true'<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5c06 SCTE-35 \u5d4c\u5165\u5230\u4e00\u4e2a&nbsp;<strong>MPEG-TS<\/strong>&nbsp;\u4ec5\u9650\u5f55\u97f3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0e\u6d41\u5f0f\u4f20\u8f93\u7684\u539f\u7406\u76f8\u540c\uff1a\u8fd9\u4e9b\u6807\u5fd7\u5f88\u5bb9\u6613\u88ab\u5ffd\u7565\u2014\u2014\u5982\u679c\u6ca1\u6709\u5b83\u4eec\uff0c\u76f4\u901a\u5f0f CC \/ SCTE-35 \u5c06\u65e0\u6cd5\u6309\u9884\u671f\u5b58\u50a8\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u5f55\u5236 SCTE-35 \u65f6\uff0c\u6765\u81ea\u7247\u6bb5\u3001\u5757\u3001\u53e0\u52a0\u5c42\u6216\u52a8\u4f5c\u6309\u94ae\u7684\u706b\u6807\uff08<strong>SCTE-35<\/strong>&nbsp;\u7c7b\u578b\uff09\u3002.<\/p>\n\n\n<style>.wp-block-kadence-spacer.kt-block-spacer-89616_6f2478-7c .kt-block-spacer{height:60px;}.wp-block-kadence-spacer.kt-block-spacer-89616_6f2478-7c .kt-divider{border-top-width:1px;height:1px;border-top-color:#eee;width:100%;border-top-style:solid;}<\/style>\n<div class=\"wp-block-kadence-spacer aligncenter kt-block-spacer-89616_6f2478-7c\" id=\"containers\"><div class=\"kt-block-spacer kt-block-spacer-halign-center\"><hr class=\"kt-divider\"\/><\/div><\/div>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>MKV \u4e0e MPEG-TS<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\"><\/th><th class=\"has-text-align-left\" data-align=\"left\">MKV<\/th><th class=\"has-text-align-left\" data-align=\"left\">MPEG-TS (<code>.ts<\/code>)<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u5b57\u5e55<\/strong>s (<code>embed_cc<\/code>)<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u662f\u7684<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u662f\u7684<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u8fb9\u8f66<\/strong>&nbsp;<code>.scc<\/code>&nbsp;\/&nbsp;<code>.anc<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u662f\uff08\u5982\u679c\u542f\u7528\u4e86\u6355\u83b7\u6807\u5fd7\uff09\u7b80\u4f53\u4e2d\u6587\uff08\u5927\u9646\uff09<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u662f\uff08\u5982\u679c\u542f\u7528\u4e86\u6355\u83b7\u6807\u5fd7\uff09\u7b80\u4f53\u4e2d\u6587\uff08\u5927\u9646\uff09<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>SCTE-35<\/strong>&nbsp;(<code>embed_scte35<\/code>)<\/td><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u4e0d<\/strong><\/td><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u662f\u7684<\/strong><\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u5e38\u89c4\u68c0\u67e5<\/td><td class=\"has-text-align-left\" data-align=\"left\">PLAYDECK \u64ad\u653e\u5217\u8868\u663e\u793a CC<\/td><td class=\"has-text-align-left\" data-align=\"left\">MediaInfo\uff1a\u89c6\u9891\u683c\u5f0f\u4e3a EIA-608\/708\uff1bDVB Inspector\uff1aSCTE-35 \u63d0\u793a\uff1bPLAYDECK\uff1aCC +&nbsp;<code>&lt;&lt;<\/code>&nbsp;SCTE-35<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7ecf\u9a8c\u6cd5\u5219<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9700\u8981&nbsp;<strong>\u4ec5\u9650CC<\/strong>&nbsp;\uff08\u4ee5\u53ca\u53ef\u9009\u7684\u526f\u6587\u4ef6\uff09\u2192 MKV \u6216 TS\u3002.<\/li>\n\n\n\n<li>\u9700\u8981&nbsp;<strong>CC + SCTE-35<\/strong>&nbsp;\u5408\u5e76\u5230\u4e00\u4e2a\u6587\u4ef6\u4e2d \u2192&nbsp;<strong>MPEG-TS<\/strong>.<\/li>\n<\/ul>\n\n\n<style>.wp-block-kadence-spacer.kt-block-spacer-89616_7ecf0c-ee .kt-block-spacer{height:60px;}.wp-block-kadence-spacer.kt-block-spacer-89616_7ecf0c-ee .kt-divider{border-top-width:1px;height:1px;border-top-color:#eee;width:100%;border-top-style:solid;}<\/style>\n<div class=\"wp-block-kadence-spacer aligncenter kt-block-spacer-89616_7ecf0c-ee\" id=\"sidecars\"><div class=\"kt-block-spacer kt-block-spacer-halign-center\"><hr class=\"kt-divider\"\/><\/div><\/div>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Sidecar \u6587\u4ef6\uff08.scc \/ .anc\uff09<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528&nbsp;<code>scc_capture<\/code>&nbsp;\/&nbsp;<code>anc_capture<\/code>, PLAYDECK \u53ef\u4ee5\u521b\u5efa\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>yourfile.scc<\/code>&nbsp;\u2014 CEA-608\uff08\u9002\u7528\u4e8e\u591a\u79cd\u5de5\u5177\uff09<\/li>\n\n\n\n<li><code>yourfile.anc<\/code>&nbsp;\u2014 CEA-708 \u98ce\u683c\u7684 ANC\uff08\u4e3b\u8981\u4e3a Medialooks\/PLAYDECK\uff09<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u4e0a<strong>&nbsp;\u57fa\u540d<\/strong>&nbsp;\u4ee5\u53ca\u4e0e\u89c6\u9891\u540c\u540d\u7684\u6587\u4ef6\u5939\u3002\u5728\u64ad\u653e\u65f6\uff0cPLAYDECK \u53ef\u4ee5\u4f7f\u7528\u5d4c\u5165\u7684\u5b57\u5e55\u548c\/\u6216\u8fd9\u4e9b\u8f85\u52a9\u6587\u4ef6\uff08\u53e6\u8bf7\u53c2\u9605&nbsp;<a href=\"https:\/\/playdeck.tv\/zh\/cc-subtitles\/\">\u9690\u85cf\u5f0f\u5b57\u5e55\u4e0e\u5b57\u5e55<\/a>).<\/p>\n\n\n<style>.wp-block-kadence-spacer.kt-block-spacer-89616_f0da51-1b .kt-block-spacer{height:60px;}.wp-block-kadence-spacer.kt-block-spacer-89616_f0da51-1b .kt-divider{border-top-width:1px;height:1px;border-top-color:#eee;width:100%;border-top-style:solid;}<\/style>\n<div class=\"wp-block-kadence-spacer aligncenter kt-block-spacer-89616_f0da51-1b\" id=\"verify\"><div class=\"kt-block-spacer kt-block-spacer-halign-center\"><hr class=\"kt-divider\"\/><\/div><\/div>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>\u9a8c\u8bc1\u64ad\u653e&nbsp;<\/strong><\/p>\n\n\n\n<h6 class=\"wp-block-heading\">\u5b57\u5e55<\/h6>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5c06\u5f55\u5236\u7684\u6587\u4ef6\u6dfb\u52a0\u5230\u64ad\u653e\u5217\u8868\u4e2d\u3002.<\/li>\n\n\n\n<li>\u5982\u679c\u63d0\u4f9bCC\u97f3\u8f68\uff0c\u8bf7\u9009\u62e9\u8be5\u97f3\u8f68\u3002.<\/li>\n\n\n\n<li>\u5728\u9891\u9053\u9884\u89c8\u4e2d\u786e\u8ba4 CC\uff08\u6839\u636e\u914d\u7f6e\u91c7\u7528\u76f4\u901a\u6216\u53e0\u52a0\u663e\u793a\uff09\u3002.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e TS\uff0c,&nbsp;<strong>MediaInfo&nbsp;<\/strong>\u901a\u5e38\u4f1a\u5217\u51fa\u590d\u7528\u5230\u89c6\u9891\u4e2d\u7684\u5b57\u5e55\u8f68\u9053\uff08EIA-608 \/ EIA-708\uff09\u3002.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">SCTE-35\uff08\u4ec5\u9650TS\uff09<\/h6>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5728\u5f55\u97f3\u8fc7\u7a0b\u4e2d\uff0c\u901a\u8fc7\u201c\u52a8\u4f5c\u201d\uff08\u6216\u7247\u6bb5\u547d\u4ee4\uff09\u53d1\u9001 SCTE-35\u3002.<\/li>\n\n\n\n<li>\u6253\u5f00&nbsp;<code>.ts<\/code>&nbsp;\u5728&nbsp;<strong>DVB \u68c0\u67e5\u5668<\/strong>&nbsp;\uff08\u6216 TSDuck\uff09\uff0c\u5e76\u786e\u8ba4 splice\/SCTE-35 \u7684\u63d0\u793a\u4fe1\u606f\u3002.<\/li>\n\n\n\n<li>\u73a9\u6cd5\u76f8\u540c&nbsp;<code>.ts<\/code>&nbsp;\u5728 PLAYDECK \u2192 SCTE \u4e8b\u4ef6\u65e5\u5fd7\u4e2d\u5e94\u663e\u793a&nbsp;<code><strong>&lt;&lt;<\/strong><\/code>&nbsp;<strong>SCTE-35<\/strong>.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6ce8\uff1a<\/strong>&nbsp;\u626e\u6f14\u4e00\u4e2a&nbsp;<strong>MKV<\/strong>&nbsp;\u65e5\u5fd7\u4e2d\u4e0d\u4f1a\u663e\u793a SCTE-35 \u2014\u2014 \u8be5\u5bb9\u5668\u4e0d\u5305\u542b\u6b64\u4fe1\u606f\u3002MediaInfo \u4e5f\u7ecf\u5e38&nbsp;<strong>\u7701\u7565<\/strong>&nbsp;\u5373\u4f7f DVB Inspector \u663e\u793a\u4e86\u63d0\u793a\uff0cSCTE-35 \u4ecd\u4f1a\u6b63\u5e38\u5de5\u4f5c\uff1b\u5efa\u8bae\u4f7f\u7528 DVB Inspector \/ PLAYDECK&nbsp;<code>&lt;&lt;<\/code>&nbsp;\u7528\u4e8e SCTE \u68c0\u67e5\u3002.<\/p>\n\n\n<style>.wp-block-kadence-spacer.kt-block-spacer-89616_1f219b-2b .kt-block-spacer{height:60px;}.wp-block-kadence-spacer.kt-block-spacer-89616_1f219b-2b .kt-divider{border-top-width:1px;height:1px;border-top-color:#eee;width:100%;border-top-style:solid;}<\/style>\n<div class=\"wp-block-kadence-spacer aligncenter kt-block-spacer-89616_1f219b-2b\" id=\"related\"><div class=\"kt-block-spacer kt-block-spacer-halign-center\"><hr class=\"kt-divider\"\/><\/div><\/div>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>\u76f8\u5173 <\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u6587\u7ae0<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u4e3b\u9898<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/playdeck.tv\/zh\/cc-scte\/\">\u9690\u85cf\u5f0f\u5b57\u5e55\u4e0eSCTE\u2014\u2014\u6982\u8ff0<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5b8c\u6574\u77e9\u9635<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/playdeck.tv\/zh\/cc-subtitles\/\">\u9690\u85cf\u5f0f\u5b57\u5e55\u4e0e\u5b57\u5e55<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u97f3\u8f68\u3001\u70e7\u5f55\/\u76f4\u901a<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/playdeck.tv\/zh\/scte\/\">SDI\u4e0a\u7684SCTE (SCTE-104)<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">SDI VANC \u6807\u8bb0<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/playdeck.tv\/zh\/scte-35\/\">\u5c06 SCTE-35 \u53d1\u9001\u81f3\u6d41\u5a92\u4f53\u670d\u52a1\u5668<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u76f4\u64ad\u3001Nimble\u3001HLS<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>PLAYDECK \u53ef\u4ee5\u5c06\u9690\u85cf\u5f0f\u5b57\u5e55\u548c SCTE-35 \u5f55\u5236\u5230\u6587\u4ef6\u4e2d\u2014\u2014\u4f46\u5e76\u975e\u6240\u6709\u5bb9\u5668\u683c\u5f0f\u90fd\u540c\u65f6\u652f\u6301\u8fd9\u4e24\u79cd\u683c\u5f0f\u3002 \u77e9\u9635\u4e0e\u57df\uff1a\u9690\u85cf\u5f0f\u5b57\u5e55\u4e0e SCTE \u2014 \u6982\u8ff0\u3002\u672c\u6587\u5185\u5bb9\uff1a\u2192 \u9700\u542f\u7528\u7684\u529f\u80fd\u2192 MKV \u4e0e MPEG-TS \u5bf9\u6bd4\u2192 \u8f85\u52a9\u6587\u4ef6 (.scc \/ .anc)\u2192 \u9a8c\u8bc1\u64ad\u653e\u6548\u679c\u2192 \u76f8\u5173\u5185\u5bb9 \u9700\u542f\u7528\u7684\u529f\u80fd \u5728\u2026\u2026 <a class=\"kt-excerpt-readmore more-link\" href=\"https:\/\/playdeck.tv\/zh\/recording-cc-scte\/\" aria-label=\"\u5f55\u5236\u9690\u85cf\u5f0f\u5b57\u5e55\u4e0eSCTE\">\u9605\u8bfb\u66f4\u591a<\/a><\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"kt_blocks_editor_width":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-89616","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Recording Closed Captions &amp; SCTE - PLAYDECK<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/playdeck.tv\/zh\/recording-cc-scte\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Recording Closed Captions &amp; SCTE - PLAYDECK\" \/>\n<meta property=\"og:description\" content=\"PLAYDECK can record&nbsp;Closed Captions&nbsp;and&nbsp;SCTE-35&nbsp;into files \u2014 but&nbsp;not every container supports both. Matrix and domains:&nbsp;Closed Captions &amp; SCTE \u2014 Overview. 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