[comp.sys.sgi] VideoCreator/Vlan example needed

LEE@krdc.int.alcan.ca (10/28/90)

We just received a Videocreator with a Vlan unit to
control a JVC 811 VCR to try and make video making simple,
but now the work has just begun.  We've got to figure out
how to make the graphics programs smoothly control the generation
of animation.
Does anyone have an piece of example code on setting the vcr to
pre-roll, grab a few frames and then reposition?  The problem is
not the coding, but none of us know much about video, and all the
steps a vcr should undergo to get frame acurrate recordings.

Peter Lee    lee@krdc.alcan.int.ca

baron@kk.asd.sgi.com (Baron Roberts) (10/31/90)

In article <12AC4B0952BFE00B53@KRDC.INT.Alcan.CA>, LEE@krdc.int.alcan.ca
writes:
|> We just received a Videocreator with a Vlan unit to
|> control a JVC 811 VCR to try and make video making simple,
|> but now the work has just begun.  We've got to figure out
|> how to make the graphics programs smoothly control the generation
|> of animation.
|> Does anyone have an piece of example code on setting the vcr to
|> pre-roll, grab a few frames and then reposition?  The problem is
|> not the coding, but none of us know much about video, and all the
|> steps a vcr should undergo to get frame acurrate recordings.
|> 
|> Peter Lee    lee@krdc.alcan.int.ca

Here is an sample V-LAN command script to perform a single event edit. This
code will position the tape to the IN point, pre-roll back 5 seconds and record
one frame of video. Note that the comments should not be typed when issuing
the V-LAN commands.

	ND 1		# Select device on network node 1
	TSV		# Indicate that video is to be recorded
	PR 5:00		# Pre-roll 5 seconds
	SI 00:00:16:30	# Set the IN (start) point at tape location 16:30
	SD 1		# Set record duration for 1 frame
	PF		# Perform the edit

When PF is entered the editing takes place. Instead of specifying a
duration with
SD an OUT (end) point can be specified using SO.


Best of luck,

Baron Roberts