Broadcast Picture or other

Conversations around originating a webcast for conference, including cameras and mixers.
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Broadcast Picture or other

Postby mart1man » Tue Jun 03, 2014 3:01 pm

I am wondering if there is a way to broadcast over the Webcaster a Word Document , a scanned picture, or an Excel spreadsheet? and how to do it!!


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Re: Broadcast Picture or other

Postby michaelfish » Mon Jun 09, 2014 10:25 am

The Webcast Communicator accepts a single composite video signal, so to get any image from a PC like a Word document, scanned picture, Excel spreadsheet etc, is simply a matter of converting the output of the computer to a composite video signal, and connecting that cable to the Webcast Communicator instead of the camera cable. Note: It is not recommended to switch cables during an active broadcast as this will disrupt the stream - use a video mixer to switch (or mix) video signals...but that's another subject.

There are many ways to get a composite video signal from a computer. The easiest would be to use a device that already has a composite video output. For example, iPads have optional adapter cables (dongles) which can be purchased to do this, and some laptops have a composite video jack, etc.

The most common device people use in conferences is a PC laptop and the VGA or HDMI output port. Those ports can be used if the signal is converted to the correct composite video signal.

A VGA port is about an inch long and has 15 pin-holes. The outer shell is shaped like a "D". An HDMI port is also shaped like a "D" but is very thin and only about 1/2 inch long. These ports are usually activated when something (like a projector or other monitor) is plugged in or by pressing the Windows key and P simultaneously, which pops up a screen with an option to duplicate displays. Selecting duplicate will put the picture on the laptop screen and also the VGA or HDMI port.

To convert the signal, a converter box called a "Scan Converter" is necessary. They cost about $25 (on up). If you are comfortable with eBay, search for "VGA to TV scan converter" or "HDMI to composite converter"

I prefer to purchase used professional equipment that is built to much higher standards becuase they are more stable and generally last longer, and cost about the same (such as the Extron VSC-50, 75 or 100 models).

After all this, I suspect you are attempting to put the hymns lyrics on the screen during the congregational hymn at a conference. If that is the case, check out this post for additional direction.

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