3fr File extension 3fr is basically associated with an occupancy of Hasselblad devices used in the format of digital photography. The 3fr format is made up of the several Raw formats. It plays a similar role in digital systems as the negatives do in film photography. It comprises of aerial resolution of the digital photo along with meta-data. The raw image file like 3fr has a lot of benefits to a JPEG file, it has greater image attribute. All the transitions made on digital negatives are nondestructive. But its drawback is that its size is almost 2 to 6 times larger than JPEG file.
mtv The .mtv filename extension is the second filename extension that refers to the proprietary video file format container AMV. AMV is a video container modified from the AVI video format and is primarily associated with video enabled Chinese portable MP4 players. Video stream files with either the .amv or .mtv filename extension can be played back on these devices. To maintain a relatively low cost, these MP4/MTV players rely on this video format and inexpensive hardware rather than more common but expensive proprietary video playback formats.