{"id":21892,"date":"2023-03-20T12:08:59","date_gmt":"2023-03-20T10:08:59","guid":{"rendered":"https:\/\/www.wjst.de\/blog\/?p=21892"},"modified":"2023-04-10T22:11:48","modified_gmt":"2023-04-10T20:11:48","slug":"audio-video-sync-latency-test-file","status":"publish","type":"post","link":"https:\/\/www.wjst.de\/blog\/sciencesurf\/2023\/03\/audio-video-sync-latency-test-file\/","title":{"rendered":"Audio\/video sync + latency test file"},"content":{"rendered":"<p>Here is an 60 fps audio\/video test file with a 440 Hz beep every 3s to test latency in <a href=\"https:\/\/obsproject.com\/de\">OBS<\/a>.<\/p>\n<p><a href=\"https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2023\/03\/test60.mp4\">Direct download here.<\/a><\/p>\n<div style=\"width: 474px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-21892-1\" width=\"474\" height=\"267\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2023\/03\/test60.mp4?_=1\" \/><a href=\"https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2023\/03\/test60.mp4\">https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2023\/03\/test60.mp4<\/a><\/video><\/div>\n<p>&nbsp;<\/p>\n<p><!--more--><\/p>\n<p>Just take a photo showing the original video screen and the OBS preview screen. The time difference of the two counters gives you the <strong>video<\/strong> latency. Seconds are shown on a decimal dial.<\/p>\n<p>To calculate the <strong>audio<\/strong> latency record the original sound in the left and the OBS processed sound in the right channel and calculate the time difference by comparing both tracks in <a href=\"https:\/\/www.audacity.de\/\">audacity<\/a>.<\/p>\n<p><a href=\"https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2023\/03\/Bildschirm\u00adfoto-2023-03-20-um-21.47.26-1.jpg\" rel=\"key\" data-rel=\"key-image-0\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-21910\" src=\"https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2023\/03\/Bildschirm\u00adfoto-2023-03-20-um-21.47.26-1-620x257.jpg\" alt=\"\" width=\"465\" height=\"193\" srcset=\"https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2023\/03\/Bildschirm\u00adfoto-2023-03-20-um-21.47.26-1-620x257.jpg 620w, https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2023\/03\/Bildschirm\u00adfoto-2023-03-20-um-21.47.26-1-1206x500.jpg 1206w, https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2023\/03\/Bildschirm\u00adfoto-2023-03-20-um-21.47.26-1-768x318.jpg 768w, https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2023\/03\/Bildschirm\u00adfoto-2023-03-20-um-21.47.26-1.jpg 1491w\" sizes=\"auto, (max-width: 465px) 100vw, 465px\" \/><\/a><\/p>\n<p>Subtract the audio latency from the video latency <a href=\"https:\/\/www.youtube.com\/watch?v=KTrS5l0zKQg\">and enter the resulting value (in milliseconds) as latency compensation in OBS<\/a> for perfectly synchronous output&#8230;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n\n<p>&nbsp;<\/p>\n<div class=\"bottom-note\">\n  <span class=\"mod1\">CC-BY-NC Science Surf , accessed 27.04.2026<\/span>\n <\/div>","protected":false},"excerpt":{"rendered":"<p>Here is an 60 fps audio\/video test file with a 440 Hz beep every 3s to test latency in OBS. Direct download here. &nbsp; &nbsp; CC-BY-NC Science Surf , accessed 27.04.2026<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[3558,4134,4147,4145,4146,4135,4148,2735,2758],"class_list":["post-21892","post","type-post","status-publish","format-standard","hentry","category-computer-software","tag-obs","tag-audio","tag-centi","tag-clock","tag-decimal","tag-latency","tag-seconds","tag-sync","tag-video"],"_links":{"self":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/21892","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/comments?post=21892"}],"version-history":[{"count":19,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/21892\/revisions"}],"predecessor-version":[{"id":21990,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/21892\/revisions\/21990"}],"wp:attachment":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/media?parent=21892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/categories?post=21892"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/tags?post=21892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}