Dewdle

An open source Telestrator.

Installation

For full installation details please see INSTALL.

Dependencies

• Node.js (MIT) - Communication between the control panel and CEF keyer is done using a simple Node server.

Recommended Keyer Programs

For usage in a streaming environment:

• OBS Studio (GPL-2.0) - Versions 18.0 and up include 'Browser Plugin', earlier versions will need to manually install it.

For usage in a broadcast environment:

• Exavideo Exacore Keyer (GPL-3.0) - The Exacore keyer is used for overlaying graphics onto a video feed.
• Exacore CEF Plugin (BSD-3-Clause) - The Exacore keyer needs CEF support.

Usage

Dewdle is split into 3 pages (each of which can have multiple instances):

Draw

• Designed to be operated by talent to create drawings.
• Has full drawing controls and optional live status control.
• Set FORCE_OP_MODE to true to enable live status control.
• Set FORCE_OP_MODE to null for a button to enable live status control.
• Set FORCE_OP_MODE to false to disable live status control.

Control

• Designed for a control room operator.
• Previews the drawing and controls live status.
• Can adjust drawing controls for talent.
• Not strictly needed if live status control is enabled on draw pages.

Render

• Designed to be what is transparently overlaid onto a video feed.
• Canvas dimensions will be CANVAS_WIDTH by CANVAS_HEIGHT.
• FADE_DURATION controls how long it takes to show/hide the canvas.
• FADE_TIMER controls how long the canvas stays up on connection loss.
• Any encoding program should load this page.

License

Dewdle is licensed under GPL-3.0: LICENSE

FOSS Inclusions

The following are included, whole or in part, within this project. All included materials must have compatible licenses.

• jQuery (MIT)
• Fabric.js (MIT)
• FileSaver.js (MIT)