The video part is usually compressed with MPEG-4, and the audio is usually compressed using AAC, which is the audio format associated with iTunes. MP4 videos are made up of video and audio elements that are compressed separately. MP4 is usually the preferred format for uploading videos to YouTube, Vimeo or other websites. As MP4 is a standardised format, it will normally play easily on most devices and media players, including Windows Media Player, QuickTime, and VLC. It was originally developed by the Moving Picture Experts Group (MPEG) but has become an ISO standard, meaning that it’s now maintained by the International Organisation for Standardization. MP4 was developed to be easily played and shared. MP4, sometimes called MPEG4, is one of the most common video formats. Indeed, only a handful of applications support the files including the VLC player and the MPlayer Whilst popular, they are not universally supported. MKV files are popular for a number of reasons, one being that they are open source and another being that they support multiple tracks within the same file and support almost any type of format meaning they’re very adaptable.
These all form a single file but each element has its own type of encoding around it. First, the file itself is a multimedia container format which is made up of three parts, namely audio, video and text in the form of subtitles. The name stems from the Russian word for Nesting Dolls, matryoshka because, like the Nesting Doll, an MKV file has many layers to it.
MKV files were developed in Russia by Matroska in 2002 and are a popular video format, specifically with users who download video content the Internet. MKV files go by the full name of a Matroska Video File.
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