Epiphan screen capture devices

Supported devices

MediaRecorder support the following Epiphan screen capture devices:


• Epiphan DVI2USB 3.0 – A frame grabber device with which you connect the
   output of the video card of the test computer to a USB 3 port of the
   recording computer (see also USB 2 and 3 ports)ports). The device has inputs for
   VGA and DVI signals. It can be connected to a USB 2 or USB 3 port. But it
   can record with a higher frame rate (up to 30 fps) when connected to a USB
   3 port.
  
  
• Epiphan VGADVI broadcaster – A frame grabber that streams the output of
   the video card over Ethernet to the computer with MediaRecorder.
  

See Set up the VGADVI Broadcaster how to install it and select it in
 MediaRecorder.

Driver

Use the driver from the MediaRecorder installation USB stick for the following
 devices:


• Epiphan DVI2USB 3.0
  

The Epiphan VGADVI broadcaster does not require driver installation.

To install the drivers, choose Epiphan Screen Capture driver in the Drivers and
 Tools field of the MediaRecorder installation window. Alternatively, browse to
 Drivers and Tools\Drivers\Epiphan\VGA_DVI2USB\X64 on the MediaRecorder
 installation USB stick and double-click the file setup.exe.
IMPORTANTexe.

important  Do not download an update of the driver from the Epiphan website!
 Otherwise, the screen capture devices may not work properly in combination with
 MediaRecorder.
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Supported setups

The table below shows the maximum supported (1) resolution, (2) frame rate (fps),
 (3) number of devices and (4) recording time (hours) and (5) whether the test has
 been carried out on a desktop PC (Dell T3640) or a laptop (3551).

* camera audio = audio over RTSP.
Logitech

Brio +
DVI2USB
(separate videos,
Picture-by-picture,
Picture-in-picture,
line-in)
1920 x 1080
30
1+1
1
L
Logitech Brio +
DVI2USB
(separate videos,
Picture-by-picture,
Picture-in-picture,
Logitech Brio
microphone)
1920 x 540
30
1+1
1
L
Axis M1065-L +
Broadcaster
(separate videos,
line-in audio and
camera audio (no
audio broadcaster)
(do NOT use
Picture-by-picture
or picture-in-
picture)
1920 x 1080
30
1+1
1
L
Axis P1375 +
Broadcaster +
Nikon ME-W1
microphone
(separate videos,
Picture-by-picture,
Picture-in-picture
(broadcaster view
in camera view,
camera audio only)
1920 x 1080
30
1+1
1
L
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Cable length

USB devices – USB devices can be connected to the computer without an amplifier
 with a cable of 5 m. For every subsequent 5 m an amplifier must be used. In theory,
 when using a standard resolution, the cables could be extended to 30 m. However
 this will not work with a screen capture device. We know that extending the
 standard 1 m cable with one 5 m cable with amplifier works well with
 MediaRecorder.

DVI signal – We know that DVI cables of up to 5 m work well with MediaRecorder.

Notes

Audio

To record audio, connect a microphone to the sound card of your computer and
 select that source in MediaRecorder settings. Although the VGADVI broadcaster can
 stream audio to MediaRecorder, we know that audio and video will not be
 synchronous in the video file. Also for this device, record audio with a separate
 microphone.

Input

All screen capture devices have inputs for different signals like DVI, VGA and HDMI,
 have only been tested with DVI input.

Frame rate

The actual frame rate of the recorded video is limited by the bandwidth of the
 screen capture device. It may be much lower than 25-30 frames per second. The
 DVI2USB 3 can record with at least 30 fps at high resolution.

Resolution

To record enough screen detail, we recommend to use these devices at high
 resolution. MediaRecorder supports a resolution of 1920 x 1200. However, screen
 capture devices by default use the resolution of the screen of the test computer. To
 change the recorded resolution, change the resolution of the monitor of the test
 computer.

Set the resolution to fixed

To avoid a change in resolution in the recorded video when the resolution of the
 test computer changes, you may want to choose a fixed resolution. With fixed
 resolution images from monitors with a lower or higher resolution will be scaled to
 the chosen resolution. This is especially useful if you record computer games, since
 the menu often has another resolution than the game itself. By fixing the resolution
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 you make sure that the entire screen is recorded, even if the resolution of the test
 computer changes.

Select other frame rate or resolution

For the Epiphan DVI2USB 3.0, Epiphan VGADVI broadcaster, changes you make in
 MediaRecorder to the frame rate and resolution are not persistent. They are lost
 when you close and restart MediaRecorder.

Changes you make to the Epiphan AV. io HD are persistent. Select the frame rate
 and resolution from the lists in the Video Settings window, or select additional
 options in the Advanced video settings.

See Select a video device

in Record video

To make persistent changes to the frame rate and resolution in the Epiphan
 DVI2USB 3.0, Epiphan VGADVI broadcaster, follow the procedure below.
1.

1. Locate the executable v2ugui2.exe.exe. By default this is located in the folder
    C:\Program Files\Epiphan\Frame Grabber Software.
   2.
   
2. Right-click it and select Properties.
   3.
   Properties.
3. Open the tab Compatibility.Compatibility. Under Privilege level,level, select the checkbox
    Run this program as an administrator.administrator. Ask you system administrator for
    help if you do not have administrator rights on your computer.
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   4.
   

   

4. Connect the screen capture device.
   5.
   
5. Open the Epiphan capture tool.
   6.
   
6. Choose Capture > Configure device.
   7.
   device.
7. Open the tab DirectShow.
   8.
   DirectShow.
8. Select the checkbox next to Fix resolution and choose a resolution from
    the list.
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   9.
   

   

9. Select Limit frame rate to and enter the frame rate.