{"id":693,"date":"2012-09-19T14:54:56","date_gmt":"2012-09-19T14:54:56","guid":{"rendered":"http:\/\/skisoo.com\/blog\/en\/?p=693"},"modified":"2013-04-23T09:45:13","modified_gmt":"2013-04-23T09:45:13","slug":"how-to-remove-the-fisheye-effect-from-gopro-hero-2-videos-with-free-software","status":"publish","type":"post","link":"https:\/\/skisoo.com\/blog\/en\/2012\/how-to-remove-the-fisheye-effect-from-gopro-hero-2-videos-with-free-software\/","title":{"rendered":"How to remove the fisheye effect from GoPro Hero 2 videos with free software ?"},"content":{"rendered":"<p>The GoPro Hero 2 is a great camera that can shoot beautiful video with a very wide angle. I find the fisheye effect pretty cool for videos with lots of activity with a person in the middle but on videos with landscapes the fisheye effect can bring some annoying distortions. The GoPro is my first camera, so I do not have any professional video editing software (and I do not want to buy one).<\/p>\n<div id=\"attachment_699\" style=\"width: 594px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/img1.skisoo.com\/2012\/09\/fisheyeCorrection.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-699\" class=\" wp-image-699 \" title=\"Fisheye Correction example on 1080p Wide Video from Go Pro Hero 2\" alt=\"Fisheye Correction example on 1080p Wide Video from Go Pro Hero 2\" src=\"https:\/\/img1.skisoo.com\/2012\/09\/fisheyeCorrection-584x328.jpg\" width=\"584\" height=\"328\" srcset=\"https:\/\/img1.skisoo.com\/2012\/09\/fisheyeCorrection-584x328.jpg 584w, https:\/\/img1.skisoo.com\/2012\/09\/fisheyeCorrection-300x168.jpg 300w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/a><p id=\"caption-attachment-699\" class=\"wp-caption-text\">Fisheye Correction example on 1080p Wide Video from Go Pro Hero 2<\/p><\/div>\n<h2>How to remove the fisheye effect of the GoPro Hero 2 with free software?<\/h2>\n<p>By using the free software Virtualdub\u00a0with the\u00a0 plugin <em>Barrel distortion correction<\/em>, I got the following result:<\/p>\n<p><iframe loading=\"lazy\" title=\"Fisheye correction example on GoPro Hero 2 HD 1080p videos\" width=\"584\" height=\"329\" src=\"https:\/\/www.youtube.com\/embed\/GMHBqRcRnOs?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>And here is a video explaining how to use\u00a0virtualdub with the plugin:<\/p>\n<p><iframe loading=\"lazy\" title=\"How to remove the fisheye effect from GoPro Hero 2 HD videos with free software\" width=\"584\" height=\"329\" src=\"https:\/\/www.youtube.com\/embed\/XyQQHnlJ_XI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h2>Step by step explanation<\/h2>\n<ul>\n<li>\u00a0\u00a0\u00a0 download <a title=\"Virtualdub\" href=\"http:\/\/www.virtualdub.org\/\" target=\"_blank\">Virtualdub <\/a>32 bits (the plugin is not available for the 64-bit version)<\/li>\n<li>\u00a0\u00a0\u00a0 download the <a title=\"Emiliano Ferrari website\" href=\"http:\/\/emiliano.deepabyss.org\/\" target=\"_blank\">plugin pack<\/a> containing the plugin Barrel Distortion Correction from Emiliano Ferrari<\/li>\n<li>\u00a0\u00a0\u00a0 Copy the vdf files from the plugin pack into the <em>plugins<\/em> folder of virtualdub<\/li>\n<li>\u00a0\u00a0\u00a0 Start virtualdub<\/li>\n<li>\u00a0\u00a0\u00a0 Open the video (the video must be in AVI to be opened in virtualdub, you can use GoPro CineForm Studio software supplied with the GoPro to convert video to AVI)<\/li>\n<li>\u00a0\u00a0\u00a0 Select <em>Full processing mode<\/em> in the <em>video<\/em> menu<\/li>\n<li>\u00a0\u00a0\u00a0 In the <em>video<\/em> menu, click on <em>Filters &#8230;<\/em>, and then add the filter <em>Barrel Distortion<\/em><\/li>\n<li>\u00a0\u00a0\u00a0 Uncheck <em>Aspect Ratio<\/em> and put the following values according to the angle used to film the video:<\/li>\n<\/ul>\n<blockquote>\n<pre><strong>wide<\/strong>\r\n alpha=-0.3\r\n beta=0.08<\/pre>\n<pre><strong>medium<\/strong>\r\n alpha=-0.16900\r\n beta=0.03300<\/pre>\n<pre><strong>narrow<\/strong>\r\n alpha=-0.082\r\n beta=0.015<\/pre>\n<\/blockquote>\n<p>To determine the correct values, you first need to modify <em>alpha<\/em> (in the negative numbers) until the parts in the top center and bottom center are vertical, then you need to modify <em>beta<\/em> by going towards positive numbers until things are correctly horizontal. If you find better values, do not hesitate to send them to me.<\/p>\n<ul>\n<li>Then, as we are in the mode <em>Full processing mode<\/em>, you must choose a compression codec ( menu <em>video<\/em>, then <em>compression<\/em>). If you leave <em>uncompressed<\/em> expect to have videos of several gigabytes.<\/li>\n<li>Finally, you just have to save the video and wait for virtualdub to finish the job.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The GoPro Hero 2 is a great camera that can shoot beautiful video with a very wide angle. I find the fisheye effect pretty cool for videos with lots of activity with a person in the middle but on videos &hellip; <a href=\"https:\/\/skisoo.com\/blog\/en\/2012\/how-to-remove-the-fisheye-effect-from-gopro-hero-2-videos-with-free-software\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":696,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[110],"tags":[105,102,101,104,106,107,78,82,108,109,103],"class_list":["post-693","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gopro","tag-aspect-ratio","tag-barrel-distortion","tag-distortion-correction","tag-distortions","tag-fisheye","tag-free-software","tag-gopro-hero-2","tag-video","tag-video-editing","tag-video-editing-software","tag-virtualdub"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/skisoo.com\/blog\/en\/wp-json\/wp\/v2\/posts\/693","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/skisoo.com\/blog\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/skisoo.com\/blog\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/skisoo.com\/blog\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/skisoo.com\/blog\/en\/wp-json\/wp\/v2\/comments?post=693"}],"version-history":[{"count":1,"href":"https:\/\/skisoo.com\/blog\/en\/wp-json\/wp\/v2\/posts\/693\/revisions"}],"predecessor-version":[{"id":926,"href":"https:\/\/skisoo.com\/blog\/en\/wp-json\/wp\/v2\/posts\/693\/revisions\/926"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/skisoo.com\/blog\/en\/wp-json\/wp\/v2\/media\/696"}],"wp:attachment":[{"href":"https:\/\/skisoo.com\/blog\/en\/wp-json\/wp\/v2\/media?parent=693"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/skisoo.com\/blog\/en\/wp-json\/wp\/v2\/categories?post=693"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/skisoo.com\/blog\/en\/wp-json\/wp\/v2\/tags?post=693"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}