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A container format is a Computer File Format that can contain various types of data, compressed by means of standardized audio/video Codecs . The container file is used to identify and Interleave the different data types. Simpler container formats can contain different types of Audio Codecs , while more advanced container formats can support multiple audio and video streams, Subtitles , chapter-information, and meta-data ( Tags ) - along with the synchronization information needed to play back the various streams together. Some containers are exclusive to audio:
Other flexible containers can hold many types of audio and video, as well as other media. The most popular multi-media containers are:
There are many other container formats, such as , NUT , MPEG , MXF , RatDVD , SVI , VOB , and DivX Media Format (DMF) .divx Other containers are exclusive to still images:
See the Comparison Of Container Formats for details regarding these formats. ISSUES The differences between various container formats arise from five main issues: # Popularity; how widely supported a container is. # Overhead. This is the difference in file-size between two files with the same content in a different container. # Support for advanced codec functionality. Older formats such as AVI do not support new codec features like B-frame s, VBR audio, VFR natively, although the format may be "hacked" to add support, creating compatibility problems. # Support for advanced content, such as chapters, subtitles, meta-tags, user-data. # Support of Streaming Media SEE ALSO
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