This page discusses
Visitors often ask how I learned to write backwards. It's fun to explain that the board is photographed in reflection, using a mirror. My studio uses a mirror, but there are actually 4 good solutions:
One of the things the Switcher can do is superimpose graphics from a computer onto the live image from the videocamera. The graphics can be from a powerpoint presentation, and can even include other videos. The Switcher sums the signals from the videocamera and the powerpoint presentation. My powerpoint slides are therefore done in 16x9 aspect ratio, and with a black background, so that the background doesn't show up in the summed video stream (see example slide below). I've provided a sample powerpoint deck.
The new HD model switcher has a new feature that we found very useful (in addition to its 1080p60 capability of course). It has two output streams, while the older non-HD model only has one. We use one of the output streams to mix the lightboard video with powerpoint graphics, and then send this to the H.264 Pro Recorder and via USB to a computer for capture. On the other channel we can mix not only the lightboard video and powerpoint graphics, but also a "teleprompter" script from yet another computer source. This output goes to the presenter's monitor, discussed next.
Switcher (video mixer)
Video mixing panel
The switcher recognizes up to six video inputs (Cam1 through Cam6), plus there is an all-black pseudo-input (Blk).
Audio mixing panel
Our wireless mic signals go into the audio inputs of the main videocamera (Cam6), and so its channel is the is the only one that I enable for audio on the audio mixer panel. Audio channels from all other cameras and laptops are disabled, so that we don't pick up unwanted sound.
I found that the ATEM switcher audio mixer's volume sliders don't work correctly, so I set them all at full volume (0 db), and I use other volume controls to adjust the audio level. Specifically, I first set the wireless mic receiver's output volume control knob to about 50%. Then I set the videocamera's manual audio level to get a reasonable level on the ATEM audio tab's VU meters. Thereafter, to fine tune for different presenters, I only need to adjust the wireless mic receiver's output volume control knob, which is the one most easily at hand.
The VU meters on the ATEM's audio mixer tab should bounce into the red rarely, but get close often. But if I need to adjust this, I don't use the audio mixer's sliders, which are still defective (as of 2016).
Video "capture to file" tab
The built-in capture now works well (as of ~2015). It is important to set the recording format to "native", not "native progressive"
The video format is H.264 inside an "mp4" filetype. If your computer doesn't have enough RAM, or isn't fast enough, it won't be able to keep up with the stream for long. If you want to check this file format, you can download a 3-second sample at the bottom of this page (videosample.mp4)