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In QuickTime Pro's MPEG-4 Export dialog, an option called "Passthrough" allows a clean export to MP4 without affecting the audio or video streams. One discrepancy ushered in by QuickTime 7 released on April 29, 2005, is that the QuickTime file format supports multichannel audio (used, for example, in the high-definition trailers on Apple's site ...
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 following comparison of video players compares general and technical information for notable software media player programs.. For the purpose of this comparison, video players are defined as any media player which can play video, even if it can also play audio files.
The M4V file format is a video container format developed by Apple and is very similar to the MP4 format. The primary difference is that M4V files may optionally be protected by DRM copy protection. Apple uses M4V to encode video files in its iTunes Store.
No installer for QuickTime 7 is included with these software packages, but users can download the QuickTime 7 installer from the Apple support site. QuickTime X on later versions of macOS support cut, copy and paste functions similarly to the way QuickTime 7 Pro did; the interface has been significantly modified to simplify these operations ...
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.
QuickTime Alternative is a smaller package and lacks the full complement of software included in Apple QuickTime, including QuickTime Player, PictureViewer, and any QuickTime Pro features. In addition, QuickTime Alternative does not run background processes such as the optional QuickTime Tray Icon from the official distribution. [citation needed]