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Conference bgsdev::multimedia_services

Title:Multimedia Services
Notice:Latest kit is always in hitujr::"/pub/"
Moderator:BGSDEV::MORRIS
Created:Fri Jul 02 1993
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:505
Total number of notes:2097

445.0. "Can we handle 30 fps w/o compression?" by NEWVAX::PAVLICEK (Zot, the Ethical Hacker) Thu Sep 19 1996 19:48

T.RTitleUserPersonal
Name
DateLines
445.1BGSDEV::MORRISTom Morris - Light & Sound EngineeringFri Sep 20 1996 02:0218
445.2don't forget spiralogSTAR::CROLLFri Sep 20 1996 11:2411
445.3ThanksNEWVAX::PAVLICEKZot, the Ethical HackerFri Sep 20 1996 20:0734
445.4examples exist....STAR::CROLLMon Sep 23 1996 10:3513
445.5re: .4 Thank you!NEWVAX::PAVLICEKZot, the Ethical HackerMon Sep 23 1996 23:071
445.6some side notesNAMIX::jptFIS and ChipsTue Sep 24 1996 06:5830
445.7re: .6 Excellent points! Thank you!NEWVAX::PAVLICEKZot, the Ethical HackerTue Sep 24 1996 09:291
445.8CCIR 601 levelsBGSDEV::MORRISTom Morris - Light & Sound EngineeringThu Sep 26 1996 20:3711
445.9The customer DEFINITELY has a choiceNEWVAX::PAVLICEKZot, the Ethical HackerThu Sep 26 1996 22:5315
445.10I was afraid I might forget something...NEWVAX::PAVLICEKZot, the Ethical HackerMon Sep 30 1996 18:5411
445.11GenlockBGSDEV::MORRISTom Morris - Light & Sound EngineeringMon Sep 30 1996 21:3124
445.12NEWVAX::PAVLICEKZot, the Ethical HackerMon Sep 30 1996 22:3117
445.133D camerasBGSDEV::MORRISTom Morris - Light & Sound EngineeringThu Oct 03 1996 01:557
445.14Imagine improving that by a few orders of magnitudeNEWVAX::PAVLICEKZot, the Ethical HackerThu Oct 03 1996 18:4915
445.15DECWET::VOBASun Mar 02 1997 09:3911
    Re .*, on a recent experimentation using an Alpha XL 366, 96 MB memory,
    Pathlight DataPump SSA adapter, Siemens-Nixdorf Informationssysteme SSA
    storage subsystem (12 x 4 GB - striped), running NT 4.0/SP2 and VidCap,
    i was able to capture with ZERO lost frame.  Nice!
    
    The VidCap video format settings included 8-bit w/ default pallete,
    direct to disk (10 GB allocated space), full (640x480), and NTSC.  I
    was able to record at any length of time and no frames lost during any
    of them.
    
    --svb
445.16BGSDEV::MORRISTom Morris - Light & Sound EngineeringWed Mar 05 1997 04:2110
Thanks for the data.  Applications which want "uncompressed" video data
are typically talking about RGB24 or YUV 4:2:2 not palletized RGB8, so
it would be more interesting to see what rates could be achieved with
one of these formats.  What data rate can the PathLight adapter sustain?

Also, what video card did you use?  If it was an AV301/AV321, you should
be able to do 640x480 YUV 4:2:2 at 30 fps off the capture board, as long
as you can stream it to disk fast enough.

Tom
445.17DECWET::VOBAWed Mar 05 1997 16:335
    Re .16, Pathlight's Data Pump can sustain up to 70 MBytes per second
    for 50% read/50% write mix, and greater than 4000 I/O operations per
    second for commercial load of 70% reads/30% writes, 4K block transfers.
    
    --svb