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OGV to 3G2
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Information about OGV |
|---|
| File extension |
| ogv |
| File category |
| Video |
| Stands for |
| Ogg Video File |
| Developer |
| Xiph.org |
| Overview |
| OGV is a free and an open container format for digital media(Audio, Video and text). It is unpatented software and can be used by users free of cost. It compresses the files using lossy compression and discards the redundant information which human ear incapable to process. It is used especially for online streaming. Furthermore, this format is also good for data manipulation and it is standardized by OGG Vorbis. This format is a container format used for Audio, Video and metadata files. For compressing of files, it uses Vorbis Compression Technology. The recorded content can be played using different software like VideoLan VLC Media player and Helix player; etc. |
| Technical description |
| An OGV file can have separate unrestricted open-source codecs for varied media types like audio, video, text. Theora and DivX are some examples. It supports variable bit rate and based on Discrete cosine transform (DCT) compression pattern. To compress or encode videos it uses Chroma subsampling (Due to low acuity for colours by humans, it uses less resolution to encode images),block-based motion compensation and an 8-by-8 DCT block. The pixels in it are grouped together in various structures- blocks, super blocks and macroblocks. Videos on the web pages can be played using HTML coding i.e. HTML5< video > tag. Although these files have different source code, yet, the videos in this format are often addressed as OGG files in HTML source code. In addition to this, a DirectShow codec pack is provided by the developers so that this format can be used both as open-source and for commercial applications as well. |
| Links |
| wikipedia.org |
Information about 3G2 |
|---|
| File extension |
| 3g2 |
| File category |
| Video |
| Stands for |
| 3GPP2 (An extended form of MPEG-4 Part 12) |
| Developer |
| 3rd Generation Partnership Project 2 |
| Overview |
| The 3G2 format is an upgraded version of .3GP file and it functions to save both audio and video files in 3G phones which are based on CDMA (Code Division multiple access). By using this format, we can transfer files over the internet and can store videos on mobile phones. It consumes less storage space when compared to the 3GP file. Therefore, it helps to save the disk space. Also, this format is very good for mobile streaming and downloading as it supports bandwidth, which is easily compatible with 3G cell phones. Moreover, this is both ISO Base media file format MPEG-4 Part 12 and MP4 file format MPEG-4 Part 14. We can use various software to open these files. For example, Apple’s free QuickTime, VLC Media player; etc. |
| Technical description |
| It is a parallel format of MPEG-4 Part 14 or MP4 but a simplified version, not the complex one. This is the perfect format for 3G cell phones to store videos as low bandwidth is required and besides this, it takes less space to store videos. 3GPP2 can store similar video and audio streams as of 3GP and some additional streams as well. For instance- AMR-NB, AMR-WB, AMR-WB+, AAC-LC, HE-AAC v1, and HE-AAC v2. In addition to these aforesaid streams, EVR-C, EVRC-B, EVRC-WB, VMR-WB are other extra streams used in this format. MPEG-4 media is stored in 3G2 format using MP4 and AVC file format specifications. |
| Links |
| wikipedia.org |
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