1~30,000 or so.
Introduction of video editing:
Video editing is the use of software for non-linear editing of the video source, added pictures, background music, special effects, scenes and other materials with the video remixed to the video source to cut, merge, and through the secondary encoding, to generate a new video with a different expressive power.
Video editing software is a software application that handles post-production editing of digital video on a computerized non-linear editing system (NLE). It replaces traditional flat celluloid negative editing tools, and analog videotape linear editing machines.
Non-linear editing software is usually based on a timeline (timeline) interface, recorded motion video clips (clip) in order to play in the timeline. Non-linear editing software provides a variety of tools for editing clips, including cropping, splitting, and cutting, as well as the ability to reorganize the clips on the timeline.
As nonlinear editing software has evolved, the capabilities it includes have expanded, and most consumer and professional nonlinear editing systems also include the ability to adjust video color, video correction, and visual effects, as well as the ability to edit or mix audio that is serially synchronized with the video.
When the editing project is complete, the nonlinear editing system can output the project to a variety of formats, including tape format for public broadcast, or compressed file formats that can be transferred over the Web, to DVD, and to mobile devices.