A media container format or sometimes referred to as wrapper format is a format that can contain various types of data such as audio and video data. The data is compressed using a codec. A codec a compound of coder and decoder is an algorithm used to compress and or decompress a multimedia data stream in order to reduce the amount of bytes needed to store or send.
Some container formats are limited to audio, like WAV files for Windows, AIFF for Mac and XMF some are limited to still images such as FITS and TIFF. There are also containers that are flexible it can hold several types of audio, video and other media such as ASF files for Windows, MP4 and Metros. The most common multimedia containers are Popularity. Widely supported container. Overhead. Example a two-hour film may be 3MB larger when in AVI than when in Metros MKV. The overhead is the difference between AVI and MKV which is 3MB.Support new codec functionality and features. Some older container formats does not support codec feature such as VBR audio and Frames.
Subtitles, chapters, metatarsi, and user data support. Streaming media support. Here is a comparison of the different popular container formats today from Wikipedia. Support for Frames variable bit rate audio variable frame rate chapters and subtitles are via a third party modification support almost any video format through VFW support almost any youtube downloader video formats through ACMSupport for Frames, chapters, subtitles, and metadata tags variable bit rate audio variable frame rate support almost any video and audio formats. Support for Frames variable bit rate audio variable frame rate support MPEG1, MPEG2 video formats support MPEG1 Layers I, II, III mp3 audio formats, other formats only in private streams. Support for Frames, metadata tags, and menus variable bit rate audio variable frame rate chapters a in specially formatted text track, and b in user data atom cannot work together with the scene Description, or segment Descriptor text and BIFS subtitles, VobSubs subtitle with private objectTypeIndication is not working with the scene Description Support for Frames, chapters, and Gog Writ and Gog Kate subtitles variable bit rate audio variable frame rate support almost any video formats through VFW and supports almost any audio format through ACM.