Below are examples of command line tools that concatenate or append Video formats together, the merging is accomplished using the command called cat. This common unix tool is extremely versatile with many uses not related to the function we intend for it. The easiest way to demonstrate a use for cat is a practical application of it's use.
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We wanted to be able to play flv's on a standalone player, however as you can not stream the video backwards or forwards when playing through a site's Flash videos or with a standalone player, it was though preferable to convert the flv's videos into formats that would allow a greater degree of file manipulation.