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Location : OVS > RED Camera Manual User Help Guide > RED One Theory of Operation > Red Video Monitoring Outputs
RED ONE CAMERA: OPERATIONS GUIDE Companion - CH 4 Theory of Operation - Red Video Monitoring Options - by Will Wagner
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Red Video Monitoring Outputs

Video Monitoring

The combinations of monitoring options can seem a little confusing at first.  They are not as confusing when you sort them into a few basic categories.  First are the on-camera monitors - the LCD Monitor and the EVF.  Then there the HD-SDI signals for Video Assist on-set.  Finally is the HDMI out.

 

The next basic rule of thumb is that only two of the monitors can have the  GUI overlays on them at any time.  This includes the EVF and LCD.  So if you are using the LCD and EVF you will not be able to have overlays on your other monitors.  If you are using one or none of the on-board monitors (like for crane work) then you can get more information to the remote monitors.  We'll get to that a few paragraphs below.

 

RED-EVF and RED-LCD

RED-EVF: 1280 x 848 resolution RGB 4:4:4 progressive video display with Surround View, frame guides and safe action / title overlays, zebra and false color exposure overlays, waveforms, camera status and operation menus.
 
RED-LCD: 1024 x 600 resolution RGB 4:4:4 progressive video display with Surround View, frame guides and safe action / title overlays, zebra and false color exposure overlays, waveforms, camera status and operation menus.

Note that the neither of these monitors has a pixel for pixel accurate representation of the 4K image.  This is not necessarily a detriment to the quality of the monitors.  They are small screens, and offer a good reference for the operator.

 

HD-SDI and HDMI Monitors

PROGRAM HD-SDI: When in record mode, these connectors provide two extra copies of the HD-SDI PREVIEW signal. When in playback mode, these connectors provide a dual-link 10-bit
RGB 4:4:4 video signal. 
 
PREVIEW HD-SDI: 1280 x 720 resolution 10-bit 4:2:2 video output (720p 50.00 /59.94 Hz). 
 
PREVIEW HDMI: 1280 x 720 resolution 10-bit 4:2:2 video output (720p 50.00 /59.94 Hz). 

Again, two basic types here: Program and Preview. 

  1. The Program HD-SDI is a dual-link (2 cables) at 4:4:4 10-bit color.  We certainly have talked enough about what this means  - so its enough to say that this is your best on-set reference.  When in dual-link mode, both channels are required for playback during recording.
     
  2. The Preview HD-SDI and HDMI are the lowest resolution monitors, and they are compressed to 4:2:2 color, but they are also the ones where off-camera overlays are sent if there are not two on-camera monitors.  To get the overlays to appear on the off-camera monitor you need to select the Preview Mode (System > Monitor > Preview > Video or Menus.

Framing Guides, Meters and Scopes

- Surround View, which is an additional visible area outside the actual recorded image.  
- Frame guidelines show common film presentation and television formats such as 2.40:1 and 1.85:1, picture center, and/or television aspect ratios such as 16:9, 14:9 and 4:3. 
- Focus is aided by the high resolution of the displays, 1:1 Focus Check function, and two user selectable waveform based focus assist meters.
- Exposure is aided by dual zebras a false color meter and Luma and RGB histograms.

Surround view is the semi-transparent area around the actual image being recorded.

Frame Guides show the common aspect ratios.  You can not adjust the shape of these guides, but there are guides in all the most common formats.

The 1:1 focus assist is very heplful for critical focus by eye.  It matches the monitors to the resolution of the chip - you will not be able to see the whole image, but the reference will be much truer and appear much larger than the regular mode.

The waveform focus assists are a little trickier to use and we'll talk about them a little more later.

The Zebras, False Color, Luma and Histograms merit a page to themselves, so I won't focus on them here (no pun intended).

System Information

System information including instantaneous frame rate, sensitivity, shutter speed, color temperature, recording format, clip name, timecode, battery and media remaining is provided in the RED-LCD or RED-EVF monitor outputs, and the rear status display on the camera back. 

While the camera is operating, there is too much information to cram it all on the monitors or overlays, so you can get some of this information from the lcd on the back panel of the camera.

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