How to split video without re-Encoding?

Without Re-Encoding output format is an ability to edit video file avoiding decoding/coding of each frame.

VideoCharge Studio includes an ability to edit video avoding decoding/coding of each frame. As decoding/coding of each frame takes considerable amount of time, using of this mode will give you fantastic increase of file editing speed. Besides, this method of video processing saves 100% of original video and audio quality.

Of course, all editing operations are not accessible while using this method. It is impossible to change file format, parameters of video or audio coding, to add a watermark or precisely cut a video fragment. But some operations such as join single-type files, cutting scenes, splitting files into parts (when precision up to frame is not critical) can be performed.

Operation principle of this method is based on the following: when you split video into parts, cut scenes the nearest index frame independent from others is used as an initial frame. This restriction leads to unprecise video splitting.

While working with the given method of file processing, VideoCharge Studio allows you to use "Editing" mode. This mode decodes/codes lacking frames and you receive a precise result as you would decode/code a complete video. Using this mode you even can add a watermark to a video! Of course, if the watermark shouldn't be visible during full video duration. Unfortunately, this ability is not accessible to all file formats. First, codecs used to video compression are necessary; second, some file formats don't give a possibility to correctly apply this method.

http://www.videocharge.com/Products/vcs/doc/without_re_encoding.php