V-LAN is a networked system from VideoMedia for frame-accurately controlling and synchronizing video V-LAN devices, such as videotape recorders. VCP-Recorder includes an interface module which allows it to communicate with a V-LAN transmitter and thereby remotely control a VTR for frame-accurate capture and lay-down of video clips.
Integrating V-LAN and VCP-Recorder is discussed in the following sections:
Refer to the V-LAN Installation guide for the correct installation of the V-LAN hardware and for connecting the V-LAN transmitter to VCP-Recorder via a serial data connection.
For each V-LAN device controlled by VCP-Recorder, you enter a line in /usr/vtr/config/vlan.conf. The general form of the configuration line is:
control type serial_port speed parity VLAN_node |
where
type is one of the following:
rs232, for a RS-232 control connection.
rs422, for a RS-422 control connection. The RS-422 connection is available on Origin and Onyx2 servers, only.
serial_port is the serial port number (for example, 1 or 2).
For example, serial port 2, which may be referred to as tty2 in the hardware inventory (see hinv(1M)) or as /dev/ttyd2 by some software programs, is specified simply by the number 2.
speed is the speed of the connection.
The speed must match the speed that has been configured on the V-LAN transmitter. The speed is usually 9600 BPS.
parity must be no parity (0).
VLAN_node is a number that identifies the target receiver on the V-LAN network.
There can be multiple deck-controlling receivers connected to the transmitter. The VLAN_node specifies which one VCP-Recorder controls.
The following example defines an RS-422 control connection that uses serial port 2 at a speed of 9600 BPS, no parity, and a V-LAN node of 1:
control rs422 2 9600 0 1 |