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Attachments (additional files, such as fonts for subtitles) are only supported in Matroska, [41] MP4 and QTFF. M2TS supports attachments as multiple files in a specific file structure: fonts for subtitles are in .otf files in the /BDMV/AUXDATA/ directory. Interactive menus are only supported in MP4, QTFF, M2TS, EVO and DMF.
The quality the codec can achieve is heavily based on the compression format the codec uses. A codec is not a format, and there may be multiple codecs that implement the same compression specification – for example, MPEG-1 codecs typically do not achieve quality/size ratio comparable to codecs that implement the more modern H.264 specification.
Video converters are computer programs that can change the storage format of digital video. They may recompress the video to another format in a process called transcoding, or may simply change the container format without changing the video format.
In contrast to that, some very general-purpose container types like AVI (.avi) and QuickTime (.mov) can contain video and audio in almost any format, and have file extensions named after the container type, making it very hard for the end user to use the file extension to derive which codec or program to use to play the files.
mp4 (Also known as MPEG-4 Part 14 or ISOBMFF or MPEG-4 Part 12 or JPEG 2000 Part 12) and mov (QTFF) are the same format. The only difference is that for mp4 H.261, H.262, H.263, H.264, H.265 (the last one only in MPEG-4 Part 14) are the only allowed video codecs. Similar restrictions are in place for audio and subtitle formats.
Audio Video Interleave (also Audio Video Interleaved and known by its initials and filename extension AVI, usually pronounced / ˌ eɪ. v iː ˈ aɪ / [3]) is a proprietary multimedia container format and Windows standard [4] introduced by Microsoft in November 1992 as part of its Video for Windows software.
Container format parts have various names: "chunks" as in RIFF and PNG, "atoms" in QuickTime/MP4, "packets" in MPEG-TS (from the communications term), and "segments" in JPEG. The main content of a chunk is called the "data" or "payload". Most container formats have chunks in sequence, each with a header, while TIFF instead stores offsets.
The only filename extension for MPEG-4 Part 14 files as defined by the specification is .mp4. MPEG-4 Part 14 (formally ISO / IEC 14496-14:2003 ) is a standard specified as a part of MPEG-4 . Portable media players are sometimes advertised as " MP4 players ", although some are simply MP3 players that also play AMV video or some other video ...