3 Known Problems and Workarounds
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1. Introduction
The Live Video Digitizer (LVD) provides real-time frame grab
capability for IRIS-4D/GT and IRIS-4D/GTX workstations. The
software option is a set of sample programs that demonstrate
the features of the LVD frame grabber board. To properly
use the LVD demos, make sure that you've installed the
standard set of demos that comes with your 4D1-5.2 system
software.
Note: Your software package includes a Software License
Agreement. This software is provided to you solely
under the terms and conditions of the Software
License Agreement. Please take a few moments to
review the Agreement.
This document contains the following chapters:
1. Introduction
2. Installation Information
3. Bug Fixes
1.1 Release_Identification_Information
Following is the release identification information for LVD:
Software Option Product Live Video Digitizer
Version 1.5.1
System Software Requirements IRIX 5.2 or later
1.2 Online_Release_Notes
After you install the online documentation for a product
(the relnotes subsystem), you can view the release notes on
your screen.
If you have a graphics system, select ``Release Notes'' from
the Tools submenu of the Toolchest. This displays the
grelnotes(1) graphical browser for the online release notes.
Refer to the grelnotes(1) man page for information on
options to this command.
If you do not have a graphics system, you can use the
relnotes command. Refer to the relnotes(1) man page for
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accessing the online release notes.
1.3 Product_Support
Silicon Graphics, Inc., provides a comprehensive product
support maintenance program for its products.
If you are in North America and would like support for your
Silicon Graphics-supported products, contact the Technical
Assistance Center at
1-800-800-4SGI.
If you are outside North America, contact the Silicon
Graphics subsidiary or authorized distributor in your
country.
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2. Installation_Information
This chapter lists supplemental information to the IRIS
Software Installation Guide. The information listed here is
product-specific; use it with the Installation Guide to
install this product.
2.1 Live_Video_Digitizer_Subsystems
The Live Video Digitizer (LVD) software includes these
subsystems:
lvd.man.relnotes Live Video Digitizer release notes
lvd.sw.demos Live Video Digitizer demo executables
lvd.sw.src Live Video Digitizer demo source code
2.2 LVD_Subsystem_Disk_Space_Requirements
This section lists the subsystems (and their sizes) of the
LVD software.
If you are installing this software for the first time, the
subsystems marked ``default'' are the ones that are
installed if you use the ``go'' menu item. To install a
different set of subsystems, use the ``install,''
``remove,'' ``keep,'' and ``step'' commands in inst to
customize the list of subsystems to be installed, then
select the ``go'' menu item.
Note: The listed subsystem sizes are approximate. Refer to
the IRIS Software Installation Guide for information
on finding exact sizes.
Subsystem Name Subsystem Size
(512-byte blocks)
lvd.man.relnotes (default) 10
lvd.sw.demos (default) 369
lvd.sw.src (default) 244
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2.3 Installation_Method
All of the subsystems for the Live Video Digitizer can be
installed using IRIX. You do not need to use the miniroot.
Refer to the IRIS Software Installation Guide for complete
installation instructions.
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3. Known_Problems_and_Workarounds
In IRIX system software releases 3.3.3 and 4.0.1, a timing
bug existed in the graphics microcode that controls frame
transfers from the Live Video Digitizer. The bug causes
frame transfers to abort early, whenever a certain time
limit is exceeded. For standard NTSC-sized transfers, the
bug did not manifest itself. If you performed PAL-sized
transfers, or enabled alpha blending, the transfers aborted
early. This problem will be corrected in future versions of
the IRIX operating system. The only workaround in these
circumstances is to transfer fewer pixels per frame.