The extension .264 refers to the files of the type Ripped video data files. The files are a kind of temporary video files that are generated during video processing.

The file structure is designed in such a way to store the temporary information of the video in bits and pieces and stich together after processing to produce the end result. Popular programs such as StaxRip and RipBot264 generate the Ripped video data files which have this .264 extension. The video data from this can be reprocessed and also encoded to other popular formats for video sharing.