Convert xvid to aac

What is the difference between .xvid and .aac?

Developer: Xvid; Bell Labs, Fraunhofer Institute, Dolby Labs, Sony and Nokia

Description: Xvid-encoded video files are digital video files that have been compressed and encoded using the Xvid codec, an open-source video codec designed for compressing video data in order to facilitate faster transmission over computer networks or for more efficient storage on computer disks. Xvid, which is a reverse spelling of "DivX," emerged as a popular format due to its ability to compress video files without significant loss of quality.; Compressed audio file similar to an .MP3 file, but offers several performance improvements; examples include a higher coding efficiency for both stationary and transient signals, a simpler filterbank, and better handling of frequencies above 16 kHz; maintains quality nearly indistinguishable from the original audio source.