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| File extension | .OFR |
| Category | Audio File |
| Description | The inception of the OFR (OptimFROG) audio format is but another win against the ‘tyranny’ of MP3. OFR uses a lossless compression algorithm and high file size reduction (by 30-70%). The extent of compression depends on the density of audio data. Therefore, hard rock tracks require deeper compression than folk or classical tracks. Encoding is very fast: for AMD Athlon XP +1800, the real-time encoding speed for CD is 12.4x, and the real-time decoding rate is 17.4x. The format is supported by Windows and Linux. |
| Associated programs | VLC media player FFMpeg |
| Developed by | Florin Ghido |
| MIME type | |
| Useful links | More detailed information on OFR files |
| File extension | .MP4 |
| Category | Audio File |
| Description | MP4 files can contain video and sound data. It is a file container that supports different multimedia content types such as multiple audio streams, subtitles, 2D and 3D image frames. MP4 is also used for streaming media services (online or digital TV). This file type supports the control of transmission speeds for media signal, as well as correcting corrupted frames. Thanks to comparatively low system requirements, MP4 is now the most popular container type for sharing media. |
| Associated programs | Apple QuickTime Player Apple iTunes Microsoft Windows Media Player VideoLAN VLC Media Player |
| Developed by | Moving Picture Experts Group |
| MIME type | |
| Useful links | More detailed information on MP4 files |
