Programing examples
Integrated Video Subsystems
visual
workstation
The integrated Video Subsystems
of the Silicon Graphics 320 and 540 provides state of the art video capture
and playback capabilities in its base model configuration.
Base Model Video Specification
| Video standard |
CCIR 601 525 (NTSC), CCIR 601
625 (PAL), SMPTE 259M |
| Video Input |
1 x Composite Video, 1 x S-Video
(Y/C) |
| Video Output |
1 x Composite Video, 1 x S-Video
(Y/C) |
| Video Capture Rate |
29.97 fps for 601-525 timing,
25 fps for 601-625 timing |
| Capture Area |
Arbitrary Clipping, including
720 x 486 (525) and 720 x 576 (625) |
| Output Placement |
Arbitrary Placement, including
720 x 486 (525) and 720 x 576 (625) |
| Square-Non-Square Pixel Conversion
on Input & Output |
Hardware Mitchell Filter, including
640 x 486 (525) and 768 x 576 (625) |
| Downscaling on Input |
Arbitrary Scaling Ratio |
| Controls |
Brightness, Contrast, Saturation,
Hue, Sharpness, Gain Control |
Application Support
| Video For Windows |
Video In for all formats. Video
Out for UYVY format |
| QuickTime (3.0.2 or higher) |
Full support of Video In, Video
Out and Video Effects Components |
Uncompressed capture/playback minimum
configuration requirements
- Base model 320/540 machine, single
or dual processor, 128MB
- Disk stripe set with 4x 7200RPM
SCSI drives or 2x 10000RPM SCSI drives
- Ultra SCSI controller (we recommend
Qlogic 1080 & Qlogic 1240)
Formats for Real-Time Video Capture/Output
| |
Video for Windows Capture |
Video for Windows Video Output |
QuickTime Capture |
QuickTime Video Output |
| RGB uncompressed |
32-bit BGRA
16-bit BGRA |
N/A |
?BGRA?, 'ABGR' |
'BGRA', 'ABGR' |
| YCrCb uncompressed |
UYVY |
UYVY |
?2vuy? |
'2vuy' |
| JPEG |
N/A |
N/A |
?mjpa?, ?jpeg? |
'mjpa', 'jpeg' |
| DV |
N/A |
N/A |
very
soon |
'dvc ', 'dvcp' |
Our YCrCb support expects the components
to be in CCIR 601 nominal range.
The Silicon Graphics optimized JPEG
compressor/decompressor can provide up to 1.5 MB/s data rate in real time.
The Silicon Graphics optimized DV decompressor is compliant to industry-standard
DV specification, interoperable with consumer DV cameras. These
software modules come installed on all base model configurations, and is accessible
via the Video for Windows and QuickTime components.
Our QuickTime components support
requires QuickTime 3.0.2 or higher revision.
Real Time Video Effects
RealTime video effects (3D DVEs)
support is provided via our QuickTime effects component.
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