MOV to AVI
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| - Information about MOV |
| File extension |
| mov |
| File category |
| Video |
| Stands for |
| MPEG-4 Part-12 |
| Developer |
| Apple |
| Overview |
| An MOV file format is a multimedia container which is used to store videos, text, images, subtitles and audios. Although, it was developed by Apple, yet, it can be used by both platforms i.e. Mac/Macintosh and Windows. Softwares that are meant for video editing especially use this format. To compress files, it uses MPEG-4 Codec. It should be noted that there is great similarity between MOV and MP4 files and they both support Apple’s QuickTime Player. But MP4 is based on international standards that is the main reason it is supported broadly. Additionally, it has the potential to abstract data references for the multimedia data. Also, it separates the media data from its offsets. |
| Technical description |
| MOV is extremely suitable for editing as there is no need to re-write data because it has the ability to import and edit in place. There are different media tracks in which data can code using distinct codecs. The data structure in tracks follow the hierarchy and they consist of atoms. An atom can either represent itself as a parent to other atoms or can have media or can edit the data. The older version of QuickTime supported only viewing of these files but the latest versions like QuickTime Pro both support editing and exporting that can be easily done by the user. ‘Passthrough’ option in this software allows clean exporting of audio and video streams to MP4. This form is an extended form of MPEG-4 PART-12. |
| Links |
| wikipedia.org |
| - Information about AVI |
| File extension |
| avi |
| File category |
| Video |
| Stands for |
| Audio Video Interleave |
| Developer |
| Microsoft |
| Overview |
| This file format stores both audio and video files for playback purposes. It is used to store files that are of high quality as file compression is less in this extension. Windows OS uses this as the default format to store multimedia files but other operating systems such as Linux, Unix and Mac also support this. The data in it is encoded by various codecs such as DivX and XviD. There is a variety of software that support these files. For instance- Microsoft Movies & TV, Windows Media Player and Apple QuickTime player; etc. Due to its low compression ability, it is widely used to make short movies, promos and advertisements; etc. It should be noted that AVI format result in large files that is why it is rarely used for video streaming. |
| Technical description |
| In AVI extension, file's data is divided into blocks or chunks as it is a sub-format of RIFF(Resource Interchange file format). An identification of each chunk is done by FourCC tag. File header and metadata of video(like height, width and frame rate) are identified by ‘hdrl tag' which is sub-chunk and it is mandatory. There is one another chunk which is also obligatory that is ‘movi tag' and it has actual audio or video data. The last sub-chunk is ‘idx1 tag' and it records the offsets of the data chunks. This ‘idx1 tag' is completely optional. There is one limitation of this format that it does not contain variable bitrate data. |
| Links |
| wikipedia.org |
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