The MOD file format was developed by Panasonic and JVC for camcorders that record onto a hard disk or SD memory card rather than tape. MOD continues to be the format of choice for a number of camcorder manufacturers. The file type is very similar to MPEG2 format. MOD files are capable of containing both standard definition and high definition video, however a number of manufacturers use the TOD file format instead as this allows for full 1080i high definition.
A .mod file supports a maximum resolution of 720 x 480 and a video signal of 480i or 576i. The supported frame aspect ratios are 4:3 or 16:9, however in some situations decoders fail to detect the correct aspect and display in 4:3. A separate file is created along with the MOD file called an MOI file. This records metadata relating to the recording such as date, time etc. This format should not be confused with the MOD sound file format, developed for use in the 1980s for early Amiga consoles.
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3GP is a file format designed for video on mobile phones. 3GP is a container that facilitates the creation, editing, transfer and viewing of video and audio using a 3G mobile phone. It is supported by most smartphones, including the Apple iPhone.
3GP is based on the structure of MPEG-4 Part 14, otherwise known as MP4. 3GP was designed to reduce the overhead in terms of storage and bandwidth to allow video files that could be handled by smartphones.
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