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Technical Details for AV Recording at the CSS


There are 9 rooms capable of recording digital video and audio.  Additionally the camera live feeds can be monitored from the main conference room.  This document describes what I have learned about the equipment and wiring.

The Computers

Every camera has a corresponding joystick controller, computer for recording, and stack of support equipment. 

The cameras output a standard definition composite video feed.  The controller uses separate PTZ wiring.

The camera feed is connected to the composite input on a kramer VM-312 (video distributor).  This produces two composite outputs, one runs to the hauppauge PVR HD, and the other runs to the kramer VP-419 (video scaler) .  The scaler creates a component signal which is routed back to the distributor, then sent to the conference room.

The microphone feed is connected to a preamplifier.  The pre-amp provides phantom power for the mic, as well as producing a stereo composite signal for the distributor.  The distributor creates two composite signals, one for the hauppauge, the other for the conference room.


The Support Equipment

The stack of support equipment includes the mic preamp (top), the hauppauge hd pvr, the video scaler, and the video distributor. 

The support equipment supports HD over component cables, but is setup and wired for SD over composite cables.  This is because the cameras only support SD.  Additionally, we wanted to record in SD to reduce the size of the digital files.

IMPORTANT: The scaler must be configured for 480p for the composite cables to function.  This is easiest to do with the IR remote, just press 480p a couple times until it activates.


Pictures of Wiring and Support Equipment




Hauppauge HD PVR Settings

These are the best settings I have found for the hauppauge.  The defaults aren't terrible, but these settings will use less storage space and have equivalent image quality: