Abstract: There is provided a method of creating a digital stream contents to be distributed via a network from an input stream signal such as a video signal and an audio signal with a simple operation. A new moving image file is created every time a “NEW” button is clicked at such as a point where scenes of an image switch, and a moving image data from such point until the “NEW” button is clicked again is stored in the moving image file. Further, a speaker name and a slide file name of each scene may be obtained from a file which is prepared separately, and recorded in an administration file in relation with a corresponding moving image file name and a time code. The moving image file may however be a single file which is not separated for every scene.