{"id":1250,"date":"2020-05-14T10:43:18","date_gmt":"2020-05-14T10:43:18","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=1250"},"modified":"2020-05-14T10:43:18","modified_gmt":"2020-05-14T10:43:18","slug":"the-secrets-of-how-mp4-film-and-video-compression-works","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/the-secrets-of-how-mp4-film-and-video-compression-works\/","title":{"rendered":"The secrets of how MP4 film and video compression works"},"content":{"rendered":"<p>You watch videos on an electronic device, tablet, smartphone or PC every day, but have you ever wondered how they work?<\/p>\n<p><a href=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/04\/Smartphone.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1175\" src=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/04\/Smartphone.jpg\" alt=\"mp4 video\" width=\"512\" height=\"301\" srcset=\"https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/04\/Smartphone.jpg 512w, https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/04\/Smartphone-300x176.jpg 300w\" sizes=\"auto, (max-width: 512px) 85vw, 512px\" \/><\/a><\/p>\n<p>If we can stream high-definition films on our computers today, it is ideal for the technologies that have been developed over the past 30 years and that have revolutionized our view of digital film archiving. Technologies that are part of video compression systems.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mp4gain.com\/mp4gain\/the-secrets-of-how-mp4-film-and-video-compression-works\/#How_does_a_video_work\" >How does a video work?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mp4gain.com\/mp4gain\/the-secrets-of-how-mp4-film-and-video-compression-works\/#Video_compression\" >Video compression<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mp4gain.com\/mp4gain\/the-secrets-of-how-mp4-film-and-video-compression-works\/#How_does_video_compression_work\" >How does video compression work?<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"How_does_a_video_work\"><\/span>How does a video work?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In general, a video is nothing more than a series of photos that appear in quick succession as quickly as possible.<\/p>\n<p>By displaying the images in succession on the order of a few tens per second, it is possible to achieve the motion effect typical of films.<\/p>\n<p><a href=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/05\/yt.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1203\" src=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/05\/yt.jpg\" alt=\"mp4 videos\" width=\"825\" height=\"330\" srcset=\"https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/05\/yt.jpg 825w, https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/05\/yt-300x120.jpg 300w, https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/05\/yt-768x307.jpg 768w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 61vw, (max-width: 1362px) 45vw, 600px\" \/><\/a><\/p>\n<p>In particular, the video we see every day generally shows 24 to 25 frames per second. The number of frames per second displayed in a video is called the frame rate or even FPS (frames per second), which you have probably heard in the field of video games.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Video_compression\"><\/span>Video compression<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If you do a quick calculation, it is clear that displaying 25 frames per second and saving exactly as you would save a photo on your computer would reach dimensions that are not realistic in terms of space.<\/p>\n<p>A short example: A medium resolution photo in JPEG requires 300 KB. If 25 photos per second have to be displayed, we need 7.5 MB per second. So a 1 hour movie would be 27 GB. Considering that a DVD can generally hold 4.7 GB of data, this would mean that the average movie should be spread over a dozen DVDs, with the effort required to replace the disc every ten minutes of the movie .<\/p>\n<p>Fortunately, we have managed to find a smarter way to play these films, and today we are generally used to recording video in kbps. H. eighth KB per second.<\/p>\n<p>An hour of 300 kbps video only consumes 135 MB, much less than the previous 27 GB, and a value that allows you to realistically transfer these videos over the Internet, creating systems like YouTube, Netflix, and the competition.<\/p>\n<p>Reducing the size of these videos is called &#8220;compression&#8221;. We generally speak of lossy compression, which is a type of compression that results in a slight loss of quality, most of which is aimed at being invisible to the eye. Human.<\/p>\n<p>The higher the compression, the greater the loss of quality, of course. And if poorly compressed video can be of very high quality if you increase the compression, you will easily get into the mistake of moving around the screen.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_does_video_compression_work\"><\/span>How does video compression work?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The compression process of a video is quite long and varied. A lot depends on the type of format used. MPEG2, H264, WEBM &#8230; There are dozens of ways to compress a video, and they all give more or less different results depending on the video type.<\/p>\n<p>In principle, however, all of these video compression formats have some strengths in common, which we will describe below.<\/p>\n<p>First we said that the video consists of a series of pictures and that we have to show all of these pictures one after the other to show the video.<\/p>\n<p>The problem is that storing all of these images takes up a lot of space. To save space, video formats generally don&#8217;t save all of the images. However, you save a single frame for every N images. Usually a complete picture is saved every 12 pictures. Of the remaining 11, only the parts of the image that have changed from the previous image are saved.<\/p>\n<p>This way, instead of having to save 12 whole images, we can save the first in its entirety and then only the piece that changes between the first and the second, then only the piece that changes between the second and the third and so on.<\/p>\n<p>The images that are completely saved are called I-FRAME and those whose only difference from the previous image is P-FRAME.<\/p>\n<p>mp4 compression ratio,,mp4 compression software,,mp4 compression percentage,,mp4 compression online,,mp4 compression tool,,mp4 compression information,,mp4 compression algorithm,,mp4 compression type,,mp4 compression app,,mp4 compression android,,mp4 compression audio,,mp4 compression apk,,mp4 average compression ratio,,mp4 average compression percentage,,mp4 vs avi compression,,mp4 best compression,,best mp4 compression software,,mp4 file size before compression,,best mp4 compression codec,,best mp4 compression settings,,mp4 compression codec,,mp4 compressor.com,,mp4 converter compressor,,mp4 codec compressor,,convert mp4 compression,,mp4 compression code,,mp4 compressor download,,mp4 compressor free download,,.mp4 compression,,mp4 compression explained,,compression mp4 en ligne,,compression mp4 en ligne gratuit,,mp4 compression for web,,mp4 compression free,,mp4 compression facts,,mp4 compression format,,mp4 compressor freeware,,mp4 compression factor,,mp4 compression file,,free mp4 compression,,compression mp4 gratuit,,logiciel compression mp4 gratuit,,how mp4 compression works,,handbrake mp4 compression,,how mp4 compression,,is mp4 compression lossy or lossless,,ios mp4 compression,,is mp4 compression lossy,,improve mp4 compression,,mp4 compression size,,mp4 compress,,mp4 compression lossy or lossless,,mp4 compression linux,,mp4 compression lossless,,mp4 lossy compression,,ffmpeg mp4 lossless compression,,mp4 compressor mac,,mp4 vs mov compression,,maximum mp4 compression,,mp4 compression to mov,,mp4 video compression,,ffmpeg mp4 no compression,,mp4 to gif no compression,,mp4 compression online free,,mp4 compression open source,,mp4 video compression online,,mp4 file compression online,,mp4 video compression online free,,mp4 compression software online,,mp4 compression premiere,,mp4 percent compression,,how much does mp4 compression percentage,,mp4 compression rate,,mp4 compression reddit,,mp4 file compression rate,,mp4 video compression ratio,,mov to mp4 compression ratio,,avi to mp4 compression ratio,,mp3 vs mp4 compression ratio,,mp4 compression software freeware,,mp4 compression settings,,mp4 video compression software,,mp4 compression technique,,mp4 unsupported compression type,,online mp4 compression tool,,free mp4 compression tool,,mp4 compression utility,,does mp4 use compression,,mp4 compression vlc,,mp4 compression virtualdub,,mp4 compressor vlc,,mp4 compressor video,,mp4 compression windows 10,,mp4 compression windows,,mp4 compression wiki,,mp4 compression wikipedia,,mp4 web compression,,how does mp4 compression work,,wordpress mp4 compression,,mp4 zip compression,,7zip mp4 compression<\/p>\n","protected":false},"excerpt":{"rendered":"<p>You watch videos on an electronic device, tablet, smartphone or PC every day, but have you ever wondered how they work? If we can stream high-definition films on our computers today, it is ideal for the technologies that have been developed over the past 30 years and that have revolutionized our view of digital film &hellip; <a href=\"https:\/\/mp4gain.com\/mp4gain\/the-secrets-of-how-mp4-film-and-video-compression-works\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;The secrets of how MP4 film and video compression works&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5996],"tags":[31113,31184,31162,31103,31104,31101,31115,31116,31125,31109,31171,31140,31146,31124,31169,31128,31181,31129,31127,31156,31133,31131,31132,31130,31126,31143,31161,25202,31098,31097,31100,31108,31135,31091,31094,31096,31093,31095,31110,31105,31114,31122,31119,31123,31117,31120,31118,31090,31137,31138,31136,31088,31148,31149,31087,31154,31157,31085,31158,31164,31134,31086,31163,31153,31166,31144,31089,31092,31170,31173,31172,31178,31179,31177,31176,31111,31112,31121,31141,31175,31174,31106,31107,31151,31159,31102,31139,31155,31147,31167,31145,31150,31152,31160,31165,31099,31142,31180,31183,31168,31182],"class_list":["post-1250","post","type-post","status-publish","format-standard","hentry","category-videogain","tag-mp4-compression","tag-7zip-mp4-compression","tag-avi-to-mp4-compression-ratio","tag-best-mp4-compression-codec","tag-best-mp4-compression-settings","tag-best-mp4-compression-software","tag-compression-mp4-en-ligne","tag-compression-mp4-en-ligne-gratuit","tag-compression-mp4-gratuit","tag-convert-mp4-compression","tag-does-mp4-use-compression","tag-ffmpeg-mp4-lossless-compression","tag-ffmpeg-mp4-no-compression","tag-free-mp4-compression","tag-free-mp4-compression-tool","tag-handbrake-mp4-compression","tag-how-does-mp4-compression-work","tag-how-mp4-compression","tag-how-mp4-compression-works","tag-how-much-does-mp4-compression-percentage","tag-improve-mp4-compression","tag-ios-mp4-compression","tag-is-mp4-compression-lossy","tag-is-mp4-compression-lossy-or-lossless","tag-logiciel-compression-mp4-gratuit","tag-maximum-mp4-compression","tag-mov-to-mp4-compression-ratio","tag-mp3-vs-mp4-compression-ratio","tag-mp4-average-compression-percentage","tag-mp4-average-compression-ratio","tag-mp4-best-compression","tag-mp4-codec-compressor","tag-mp4-compress","tag-mp4-compression-algorithm","tag-mp4-compression-android","tag-mp4-compression-apk","tag-mp4-compression-app","tag-mp4-compression-audio","tag-mp4-compression-code","tag-mp4-compression-codec","tag-mp4-compression-explained","tag-mp4-compression-factor","tag-mp4-compression-facts","tag-mp4-compression-file","tag-mp4-compression-for-web","tag-mp4-compression-format","tag-mp4-compression-free","tag-mp4-compression-information","tag-mp4-compression-linux","tag-mp4-compression-lossless","tag-mp4-compression-lossy-or-lossless","tag-mp4-compression-online","tag-mp4-compression-online-free","tag-mp4-compression-open-source","tag-mp4-compression-percentage","tag-mp4-compression-premiere","tag-mp4-compression-rate","tag-mp4-compression-ratio","tag-mp4-compression-reddit","tag-mp4-compression-settings","tag-mp4-compression-size","tag-mp4-compression-software","tag-mp4-compression-software-freeware","tag-mp4-compression-software-online","tag-mp4-compression-technique","tag-mp4-compression-to-mov","tag-mp4-compression-tool","tag-mp4-compression-type","tag-mp4-compression-utility","tag-mp4-compression-virtualdub","tag-mp4-compression-vlc","tag-mp4-compression-wiki","tag-mp4-compression-wikipedia","tag-mp4-compression-windows","tag-mp4-compression-windows-10","tag-mp4-compressor-download","tag-mp4-compressor-free-download","tag-mp4-compressor-freeware","tag-mp4-compressor-mac","tag-mp4-compressor-video","tag-mp4-compressor-vlc","tag-mp4-compressor-com","tag-mp4-converter-compressor","tag-mp4-file-compression-online","tag-mp4-file-compression-rate","tag-mp4-file-size-before-compression","tag-mp4-lossy-compression","tag-mp4-percent-compression","tag-mp4-to-gif-no-compression","tag-mp4-unsupported-compression-type","tag-mp4-video-compression","tag-mp4-video-compression-online","tag-mp4-video-compression-online-free","tag-mp4-video-compression-ratio","tag-mp4-video-compression-software","tag-mp4-vs-avi-compression","tag-mp4-vs-mov-compression","tag-mp4-web-compression","tag-mp4-zip-compression","tag-online-mp4-compression-tool","tag-wordpress-mp4-compression"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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Technologies that are part of video compression systems.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mp4gain.com\/mp4gain\/the-secrets-of-how-mp4-film-and-video-compression-works\/\" \/>\n<meta property=\"og:site_name\" content=\"mp4gain.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/mp4gain\" \/>\n<meta property=\"article:published_time\" content=\"2020-05-14T10:43:18+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/04\/Smartphone.jpg\" \/>\n<meta name=\"author\" content=\"R. Arias\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@mp4gain\" \/>\n<meta name=\"twitter:site\" content=\"@mp4gain\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"R. 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