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| Name | WEBM | MOV |
| Full name | WEBM - HTML5 video | MOV - QuickTime File Format |
| File extension | .webm | .mov, .qt |
| MIME type | video/webm, audio/webm | video/quicktime |
| Developed by | Apple Inc. | |
| Type of format | video file format | Media container |
| Description | WebM is a video file format. It is primarily intended to offer a royalty-free alternative to use in the HTML5 video tag. It has a sister project WebP for images. The development of the format is sponsored by Google, and the corresponding software is distributed under a BSD license. | QuickTime File Format (QTFF) is a computer file format used natively by the QuickTime framework. The International Organization for Standardization approved the QuickTime file format as the basis of the MPEG-4 file format. Because both the QuickTime and MP4 container formats can use the same MPEG-4 formats, they are mostly interchangeable in a QuickTime-only environment. |
| Technical details | The WebM container is based on a profile of Matroska. WebM initially supported VP8 video and Vorbis audio streams. In 2013 it was updated to accommodate VP9 video and Opus audio. | The format specifies a multimedia container file that contains one or more tracks, each of which stores a particular type of data: audio, video, or text (e.g. for subtitles). Each track either contains a digitally-encoded media stream (using a specific format) or a data reference to the media stream located in another file. |
| Associated programs | VLC media player, MPlayer, K-Multimedia Player, Mozilla Firefox, Opera, Google Chrome, FFmpeg. | QuickTime |
| Wiki | https://en.wikipedia.org/wiki/WebM | https://en.wikipedia.org/wiki/QuickTime_File_Format |