Slideshows and Videos

Conversations around originating a webcast for conference, including cameras and mixers.
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Slideshows and Videos

Postby drepouille » Mon Apr 13, 2015 9:00 am

If a presenter wants to show a PPT slideshow or an Internet video during a webcast, how can I capture it in the webcast?

We have been asked to set up a computer (probably a laptop) and a projector at the podium, so these things may be displayed on the screen behind the choir seats. I can use the crab box to connect the computer to the audio mixer, and then feed the sound from the mixer into the sound system and the VidiU.

Is my only option for capturing the projected video to simply point the camera at the screen and hope for the best? I know that such air gaps are deadly to both audio and video signals. I imagine the video would not come through very well at the receiving sites.
Dana Repouille, Plattsmouth, Nebraska

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Re: Slideshows and Videos

Postby russellhltn » Mon Apr 13, 2015 10:30 am

Unless you have a video mixer, I'm not sure as you have a choice. Using standard A/V switches will cause a loss of sync on each change. You also have the problem that if any pointers are used on the screen, that will not be captured by any connection to the video.

Some projectors have a "out" that you might be able to tap. But then you'd have to convert that to the HDMI that the VidiU needs. Just one caution on that. The projector's output may only be for a matching input and may not convert between types. So a composite "out" may not work when you're using the VGA "in". Only if the composite "in" is used. Be sure to test is that's your plan.
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