Containers are sometimes referred to as file extensions, e.g. Some codecs can be wrapped in multiple different containers. For example, MP4 is a container, and can hold different types of video compression, for example, MPEG-2 Part 2, MPEG-4 AVC, or HEVC, as well as audio (again compressed in a variety of formats) and metadata (for example subtitles). NOTE: It's important to distinguish between file container formats and compression formats, or codecs. Additionally, you may want to retain alpha channel transparency, which means you cannot use a format such as MP4. You might want to convert MOV files to AVI because AVI is supported for native playback on more devices than MOV. AVI files are one of the few container formats that support alpha channel, or transparency. AVI is often used to save uncompressed, or lossless video, but because of this AVI files tend to be very large - 2-3 GB for every minute of video. MOV files are one of the few container formats that support alpha channel, or transparency.Īudio Video Interleave or AVI files are a popular video container created by Microsoft in 1992 and are the standard across Windows machines. They were built as a cross-platform format, meaning they can be played on many Mac and Windows applications. MOV files were created by Apple, are associated with the application Quicktime and often times use the MPEG-4 codec for compression.
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