![]() ![]() Because both file elements are compressed, MP4s normally have a smaller file size than many other video formats, but still maintain relatively high quality for sharing online. 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. MPEG-4 è basato sugli standard MPEG-1, MPEG-2 e Apple QuickTime technology, supportandone tutte le caratteristiche ISO approvò il formato QuickTime come base per lo standard MPEG-4, dato che lMPEG group riteneva che fosse la migliore base di partenza e che integrasse già alcune caratteristiche essenziali 1. Command-line utilities afconvert (to convert audio formats), avconvert (to convert video formats) and qtmodernizer (to automatically convert older formats to H.264/AAC) are provided with macOS for power users. 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. The QuickTime framework provides the following: Encoding and transcoding video and audio from one format to another. MP4 was developed to be easily played and shared. MP4, sometimes called MPEG4, is one of the most common video formats. ![]()
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