Saturday, July 16, 2005

Capturing Process

from http://www.clickandgovideo.ac.uk/capturing2.htm

This Capturing Process, put simple, takes you through the stages necessary to deliver the film that is on your camera in a streaming format.

Definition

If the source footage is analogue, "capture" refers to the act of digitisation (conversion to a digital format) to make the video usable on a computer and, usually, the simultaneous application of compression to reduce the video to a manageable data rate for processing and storage.

If the source video is digital, "capture" typically refers to the simple transfer of video from an external device, such as a digital camcorder or tape deck, to a computer hard drive.

The term digitising is often used interchangeably with capturing.

Acquire video. Shooting a scene with a camera or gathering pre-recorded content

Capture video. Digitise the video to a standard file format, such as AVI or QuickTime.

Edit the on-demand video if necessary with your video editing software. If you are broadcasting live, however, you encode the streaming video directly from the source.

Encode clip. Encode your source into streaming format e.g. RealVideo. Targeting a network bandwidth(s) or set of bandwidths and choose a codec.

Mount to server. You FTP (File Transfer Protocol) all the relevant files to the streaming server.

Deliver clip. With your presentation is ready, you make your clip or broadcast available through your website with links. If you are combining video with another streaming clip you write the code, e.g. SMIL, that assembles the pieces

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